Shanghai Huabang Industrial Business Network - Indoor vacuum circuit breaker

[Indoor vacuum circuit breaker]EVS1P-12/T1250-40 type vacuum circuit breaker

2026-6-10 19:56:35

EVS1P-12/T1250-40 vacuum circuit breaker

Technical Specifications

serial number	name		unit	Numerical value
one	rated voltage		kV	twelve
two	Rated insulation level	1-minute power frequency withstand voltage	kV	forty-two
		Impulse withstand voltage (peak value)		seventy-five
three	rated current		A	one thousand two hundred and fifty
four	Rated short-circuit breaking current		kA	forty
five	Rated short-circuit closing current (peak)			one hundred
six	Rated peak withstand current			one hundred
seven	Rated short-time withstand current			40
eight	Electrical lifespan		time	thirty
nine	Rated short-circuit current duration		s	four
ten	Rated operating sequence			Min-0.3s HeFen-180s HeFen
eleven	mechanical life		time	twenty thousand
twelve	Rated breaking current of a single capacitor bank		A	six hundred and thirty
thirteen	Rated back-to-back capacitor bank breaking current		A	four hundred

EVS1P-12/T1250-40 vacuum circuit breaker

[Indoor vacuum circuit breaker]EVS1P-12/T1250-31.5 type vacuum circuit breaker

2026-6-10 19:56:26

The EVS1P-12/T1250-31.5 vacuum circuit breaker is an indoor device with a rated voltage of 12kV and a three-phase AC frequency of 50Hz. It can be used for controlling and protecting electrical facilities in industrial and mining areas, enterprises, power plants, and substations. This product complies with the relevant provisions of GB1984-2003 "High Voltage AC Circuit Breakers", JB3855 "Indoor High Voltage AC Vacuum Circuit Breakers", DL403 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breakers" and IEC62271-100:2001 "High Voltage AC Circuit Breakers".
The EVS1P-12/T1250-31.5 series indoor high-voltage vacuum circuit breaker can be installed in both mobile and fixed switchgear. This circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard, low noise, and is suitable for harsh working conditions such as frequent operation.
Product Structure Features ��
The EVS1P-12/T1250-31.5 vacuum circuit breaker arranges the arc extinguishing chamber and the operating mechanism on a irregular frame, that is, an integrated layout. This structural design can make the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduce unnecessary intermediate transmission links, lower energy consumption and noise, and make the operating performance of the circuit breaker more reliable. Users can directly put it into operation without adjustment. The EVS1P-12/T1250-31.5 indoor high-voltage vacuum circuit breaker can be installed in both mobile and fixed switchgear.
The main circuit of the circuit breaker adopts a structure in which a vacuum arc extinguishing chamber is sealed inside the insulated pole. The vacuum arc extinguishing chamber is longitudinally sealed inside a tubular insulation cylinder, which is cast from epoxy resin using APG technology. This structural design not only prevents the vacuum arc extinguishing chamber from being damaged by external factors, but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.
The operating mechanism is an independent spring energy storage type, with manual and electric energy storage functions. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber and has a clamp plate structure.

Technical parameters of EVS1P-12/T1250-31.5 vacuum circuit breaker:

serial number	name		unit	Numerical value
one	rated voltage		kV	twelve
two	Rated insulation level	1-minute power frequency withstand voltage	kV	forty-two
		Impulse withstand voltage (peak value)		seventy-five
three	rated current		A	one thousand two hundred and fifty
four	Rated short-circuit breaking current		kA	thirty-one point five
five	Rated short-circuit closing current (peak)			eighty
six	Rated peak withstand current			eighty
seven	Rated short-time withstand current			thirty-one point five
eight	Electrical lifespan		time	thirty
nine	Rated short-circuit current duration		s	four
ten	Rated operating sequence			Min-0.3s HeFen-180s HeFen
eleven	mechanical life		time	twenty thousand
twelve	Rated breaking current of a single capacitor bank		A	six hundred and thirty
thirteen	Rated back-to-back capacitor bank breaking current		A	four hundred

EVS1P-12/T1250-31.5 vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN90-40.5/T2000-31.5 Indoor vacuum circuit breaker

2026-6-10 19:56:17

ZN90-40.5/T2000-31.5 Indoor Vacuum Circuit Breaker

The ZN90-40.5 fully assembled vacuum circuit breaker provides users with the opportunity to choose technologically advanced vacuum circuit breaker manufacturing technology
Leading technological means are the guarantee of high reliability
Excellent overall structure
Easy user operation
Design that is easy to operate and inspect, requiring minimal maintenance
The perfect anti misoperation locking design provides safety assurance for operators

Technical parameters of ZN90-40.5/T2000-31.5 indoor vacuum circuit breaker

Serial number	Project			unit	data
one	rated voltage			kV	forty point five
two	Rated insulation level	Short term (1-minute) power frequency withstand voltage			ninety-five
		Lightning impulse withstand voltage (peak value)			one hundred and eighty-five
three	rated frequency			Hz	fifty
four	rated current			A	1250��1600��2000
five	Rated short-time withstand current			kA	25, 31.5
six	Rated peak withstand current				63, 80
seven	Rated short-circuit duration			s	four
eight	Rated short-circuit breaking current			kA	25, 31.5
nine	The specified value of expected transient recovery voltage	Test Method 4		kV	sixty-nine point five
		Test Method 3			seventy-four point five
		Test methods 1 and 2			seventy-four point five
ten	Rated short-circuit closing current			kA	63, 80
eleven	Rated operating sequence				O-0.3s-CO-180s-CO
twelve	rated time parameter	Opening time		ms	50±15
		closing time			65±15
		Combination and division time			��150
		Cut off time			��90
		arcing time			��15
thirteen	Rated short-circuit breaking current breaking times			time	thirty
fourteen	mechanical life				ten thousand
fifteen	Rated operating voltage of closing and opening coils			V	AC:110��220
					DC:110��220
sixteen	Rated earth fault breaking current for different phases			kA	21.8, 27.3
seventeen	Rated breaking current of a single capacitor bank			A	six hundred and thirty
eighteen	Rated back-to-back capacitor bank breaking current				four hundred
nineteen	Rated capacitor Group closing surge	Single capacitor group	peak	kA	twelve point five
			frequency	Hz	��1000
		back-to-back capacitor bank	peak	kA	eight
			frequency	Hz	��1000

[Indoor vacuum circuit breaker]EVH1A-40.5/T2500-31.5 type solid sealed pole vacuum circuit breaker

2026-6-10 19:56:09

EVH1A-40.5/T2500-31.5 Solid Sealed Pole Vacuum Circuit Breaker

The EVH1A-40.5/T2500-31.5 solid sealed pole vacuum circuit breaker is an indoor device with a rated voltage of 40.5kV and a three-phase AC frequency of 50Hz. It is designed in accordance with the State Grid Corporation of China's material procurement standard (2009 edition) "General Technical Specification for 12kV, 24kV, 40.5kV High Voltage Switchgear" and can be used for control and protection of electrical facilities in industrial and mining areas, enterprises, power plants, and substations.
This product complies with the relevant provisions of GB1984-2003 "High Voltage AC Circuit Breakers", JB3855 "Indoor High Voltage AC Vacuum Circuit Breakers", DL403 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breakers" and IEC62271-100:2001 "High Voltage AC Circuit Breakers". The technical performance and parameters of this product meet the requirements of the centralized procurement technical specifications of State Grid Corporation of China.
The EVH1A-40.5/T2500-31.5 series indoor high-voltage solid sealed pole vacuum circuit breaker can be installed in a truck mounted switchgear. This circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard, low noise, and is suitable for harsh working conditions such as frequent operation.

Product Structure Features
The EVH1A-40.5/T2500-31.5 solid sealed pole vacuum circuit breaker arranges the arc extinguishing chamber and the operating mechanism on a shared frame, that is, an integrated layout. This structural design can make the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduce unnecessary intermediate transmission links, lower energy consumption and noise, and make the operating performance of the circuit breaker more reliable. The EVH1A-40.5/T2500-31.5 indoor high-voltage vacuum circuit breaker can be installed in a truck mounted switchgear.
The main circuit of the circuit breaker adopts a structure in which a vacuum arc extinguishing chamber is sealed inside the insulated pole. The vacuum arc extinguishing chamber is longitudinally sealed inside a tubular insulation cylinder, which is cast from epoxy resin using APG technology. This structural design not only prevents the vacuum arc extinguishing chamber from being damaged by external factors, but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.
The operating mechanism is an independent spring energy storage type, with manual and electric energy storage functions. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber and has a clamp plate structure.

Technical parameters of EVH1A-40.5/T2500-31.5 fixed sealed pole vacuum circuit breaker

serial number	Project			unit	Rated parameters
one	rated voltage			kV	forty point five
two	Rated insulation level	1-minute power frequency withstand voltage (effective value) for ground, phase to phase, and ordinary fracture surfaces		kV	ninety-five
		Lightning impulse withstand voltage (peak value) for ground, phase to phase, and ordinary fracture surfaces			one hundred and eighty-five
three	rated frequency			Hz	fifty
four	rated current			A	630, 1250, 1600, 2000, 2500
five	Rated short-time withstand current			kA	thirty-one point five
six	Rated peak withstand current			kA	eighty
seven	Rated short-circuit current duration			s	four
eight	Rated short-circuit closing current (peak)			kA	eighty
nine	Rated short-circuit breaking current		Effective value of communication component	kA	thirty-one point five
			Effective value of DC component		48%
ten	Rated operating sequence				Split -0.3s - Split -180s - Split - Split
eleven	Rated out of step breaking current			kA	eight
twelve	Rated out of phase breaking current				twenty-seven point three

[Indoor vacuum circuit breaker]EVH3R-2X31.5/T2000 series railway specific single-phase bipolar vacuum circuit breaker

2026-6-10 19:56:00

The EVH3R-2X31.5/T2000-31.5 series railway specific single-phase bipolar vacuum circuit breaker is a single-phase AC 50Hz, rated voltage of 31.5kV, suitable for indoor single-phase bipolar circuit breakers with miniaturized C-GIS. Specially used for railway substations and partition pavilions, for power supply, protection, and control of railway traction systems.
The circuit breaker adopts an integral layout, and the operating mechanism is an independent module with independent models. By adopting this form, the structure becomes simple and compact, and the mechanism can be individually packaged and then combined with the circuit breaker, greatly improving production efficiency and also greatly enhancing the mechanical operation reliability of the circuit breaker. The arc extinguishing chamber and operating mechanism of the circuit breaker are arranged in a front to back manner, with a reasonable structure and small volume.
The energy storage part, transmission part, buffering part, tripping part, and mechanical interlocking of the operating mechanism are all integrated into one, with only one output interface connected to the main circuit. The mechanism is composed of various forces in the mechanism, and the design will fully consider the effect of each force in the mechanism, making the arrangement of the transmission mechanism reasonable to ensure the minimum deformation of components. This not only ensures performance but also improves the reliability of the mechanism.

Characteristics of EVH3R-2X31.5/T2000 series railway specific single-phase bipolar vacuum circuit breaker

The main circuit structure is uniquely designed with uniform electric field distribution, high insulation performance, optimized mechanical structure design, and high strength.
The installation plate with thin plate welding and sealing ring structure is easy to manufacture, has high strength, and low cost.
The closing spring adopts a compression spring and a double sheet thin steel plate guide structure, which is compact in structure and stable in performance.
The outer surface of the vacuum impregnated insulation rod has a smooth arc transition, a reasonable structure, high mechanical strength, and good insulation performance.
The compression and transmission structure design of the contact spring is innovative, cleverly converting rotational motion into linear motion, and the pressure of the contact spring is very easy to adjust.
The connection structure between the insulation rod and the corrugated pipe guide rod is reliable and easy to assemble.
The circuit breaker panel is aesthetically pleasing and elegant.

Technical parameters of EVH3R-2X31.5/T2000 series railway specific single-phase bipolar vacuum circuit breaker

serial number	parameter name					unit	Numerical value
one	rated voltage					kV	2X31.5
two	Rated insulation level		1-minute power frequency withstand voltage (effective value)		to the ground	kV	ninety-five
					fracture		ninety-five
					Jijian		one hundred and forty
			Lightning impulse withstand voltage (peak value)		to the ground		two hundred
					fracture		two hundred and fifteen
					Jijian		three hundred and twenty-five
three	use altitude					rice	two thousand
four	rated frequency					Hz	fifty
five	rated current					A	two thousand
six	Rated short-time withstand current					kA	thirty-one point five
seven	Rated peak withstand current					kA	eighty
eight	Rated short-circuit current duration					s	four
nine	Rated short-circuit breaking current			Effective value of communication component		kA	thirty-one point five
nine	Rated short-circuit breaking current			Percentage of DC component			48%
ten	Rated operating sequence						O-0.3s-CO-180s-CO
eleven	Rated short-circuit closing current					kA	eighty
twelve	Rated main circuit resistance (between dynamic and static output lines)					�̦�	��15
thirteen	mechanical life					time	ten thousand
fourteen	Auxiliary and control circuits	Rated power supply voltage				V	DC��AC220 DC��AC110
fourteen	Auxiliary and control circuits	Rated power frequency				Hz	fifty

[Indoor vacuum circuit breaker]ZN65-12/4000-63 type generator outlet high-voltage vacuum circuit breaker

2026-6-10 19:55:51

ZN65-12/4000-63 Generator Outlet High Voltage Vacuum Circuit Breaker

Adopting an overall layout and modular design of units based on their functions
Using a unique variable transmission mechanism to drive the moving contact of the vacuum arc extinguishing chamber
The energy storage mechanism of the circuit breaker is simple and its functions are highly integrated
Good adaptability, can be easily used for various cabinet types such as JYN3, KYN3, KYN18C, XGN2, GG1A, etc
Complete specifications, serialized for convenient user selection

Technical parameters of ZN65-12/4000-63 generator outlet high-voltage vacuum circuit breaker

serial number	Rated parameters		Parameter values
one	Rated voltage kV		twelve
two	Rated insulation level (phase to phase, ground to ground, fracture)	1-minute power frequency withstand voltage (Effective value) kV	Alternating and facing the ground	forty-two
			fracture	fifty
		Lightning impulse withstand voltage (Peak) kV	Alternating and facing the ground	seventy-five
			fracture	eighty-five
three	Auxiliary circuit 1-minute power frequency withstand voltage kV		two thousand
four	Rated frequency Hz		fifty
five	Rated current A		four thousand
six	Rated short-time withstand current kA		sixty-three
seven	Rated peak withstand current kA		one hundred and seventy-six
eight	Rated short-circuit duration s		four
nine	Rated short-circuit breaking current kA		sixty-three
ten	DC component of rated short-circuit breaking current		��75%
eleven	Rated short-circuit closing current (peak) kA		one hundred and seventy-six
twelve	Rated operating sequence		Split -15 minutes - Split
thirteen	Rated out of step breaking current kA		thirty-one point five
fourteen	Rated load opening and closing times several times		one hundred
fifteen	Expected transient recovery voltage specified value for system source		Peak voltage kV		twenty-two
			Reference time �� s		four point nine
			Rising rate kV/�� s		four point five
seventeen	Closing time in milliseconds		55±10
eighteen	Opening time ms		45±10
nineteen	Closing bounce time ms		��2
twenty	Three phase closing and opening asynchronous ms		��2
twenty-two	Split time ms		one hundred
twenty-three	Rated breaking time in milliseconds		��70
twenty-four	Mechanical lifespan times		ten thousand
twenty-five	Allowable cumulative thickness of wear for dynamic and static contacts mm		three

[Indoor vacuum circuit breaker]EVH6-31.5(G)/2500 Plateau type railway dedicated single pole vacuum circuit breaker

2026-6-10 19:55:42

EVH6-31.5 (G)/2500 plateau railway dedicated single pole vacuum circuit breaker

It is an indoor single pole circuit breaker with a single-phase AC frequency of 50Hz and a rated voltage of 31.5kV. Indoor devices suitable for use in areas with an altitude of 4000 meters or below, specifically designed for railway substations and partition pavilions, used for power supply, protection, and control of railway traction systems.
The circuit breaker adopts an integral layout, and the operating mechanism is an independent module with independent models. By adopting this form, the structure becomes simple and compact, and the mechanism can be individually packaged and then combined with the circuit breaker, greatly improving production efficiency and also greatly enhancing the mechanical operation reliability of the circuit breaker. The arc extinguishing chamber and operating mechanism of the circuit breaker are arranged in a front to back manner, with a reasonable structure and small volume.
The energy storage part, transmission part, buffering part, tripping part, and mechanical interlocking of the operating mechanism are all integrated into one, with only one output interface connected to the main circuit. The mechanism is composed of various forces in the mechanism, and the design will fully consider the effect of each force in the mechanism, making the arrangement of the transmission mechanism reasonable to ensure the minimum deformation of components. This not only ensures performance but also improves the reliability of the mechanism.

Technical parameters of EVH6-31.5 (G)/2500 plateau railway dedicated single pole vacuum circuit breaker

serial number	parameter name						unit	Numerical value
one	rated voltage						kV	thirty-one point five
two	Rated insulation level	1-minute power frequency withstand voltage (effective value)		to the ground				Before correction*	After correction**
								ninety-five	one hundred and thirty-six
				fracture		Insulation inside the arc extinguishing chamber		ninety-five	ninety-five
						Outdoor insulation for arc extinguishing		ninety-five	one hundred and thirty-six
		Lightning impulse withstand voltage (peak value)		to the ground				one hundred and eighty-five	two hundred and seventy
				fracture		Insulation inside the arc extinguishing chamber		one hundred and eighty-five	one hundred and eighty-five
						Outdoor insulation for arc extinguishing		one hundred and eighty-five	two hundred and seventy
three	rated frequency						Hz	fifty
four	rated current						A	1250, 1600, 2000, 2500
five	Rated short-time withstand current						kA	thirty-one point five
six	Rated peak withstand current							eighty
seven	Rated short-circuit duration						s	four
eight	Rated short-circuit breaking current				Communication component		kA	thirty-one point five
					DC component			42%
nine	Rated short-circuit closing current (peak)						kA	eighty
ten	Rated operating sequence							O-0.3s-CO-180s-CO
eleven	Rated capacitive breaking current		Rated breaking current of a single capacitor bank				A	four hundred
twelve			Rated cable charging breaking current				A	fifty
thirteen	Split time (empty load)							one hundred and ten
fourteen	Rated breaking time							��75
fifteen	mechanical life						time	twenty thousand
sixteen	Allowable cumulative thickness of wear for dynamic and static contacts						mm	three
seventeen	Electrical lifespan						time	twenty

The value of EVH6-31.5 (G)/2500 plateau railway dedicated single pole vacuum circuit breaker during the 4000m altitude test * the corrected value of the product during the 1000m altitude test

[Indoor vacuum circuit breaker]EVH1-40.5 New type of solid sealed pole vacuum circuit breaker

2026-6-10 19:55:34

The EVH1-40.5/T2500-31.5 vacuum circuit breaker is an indoor device with a rated voltage of 40.5kV and a three-phase AC frequency of 50Hz. It can be used for controlling and protecting electrical facilities in industrial and mining areas, enterprises, power plants, and substations. This product complies with the relevant provisions of GB1984-2003 "High Voltage AC Circuit Breakers", JB3855 "Indoor High Voltage AC Vacuum Circuit Breakers", DL403 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breakers" and IEC62271-100:2001 "High Voltage AC Circuit Breakers".
The EVH1-40.5/T2500-31.5 series indoor high-voltage vacuum circuit breaker can be installed in a truck mounted switchgear. This circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard, low noise, and is suitable for harsh working conditions such as frequent operation.

Product Structure Features
The EVH1-40.5/T2500-31.5 vacuum circuit breaker arranges the arc extinguishing chamber and the operating mechanism in a shared frame, that is, an integrated layout. This structural design can make the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduce unnecessary intermediate transmission links, lower energy consumption and noise, and make the operating performance of the circuit breaker more reliable.
The main circuit of the circuit breaker adopts a structure in which a vacuum arc extinguishing chamber is sealed inside the insulated pole. The vacuum arc extinguishing chamber is longitudinally sealed inside a tubular insulation cylinder, which is cast from epoxy resin using APG technology. This structural design not only prevents the vacuum arc extinguishing chamber from being damaged by external factors, but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.
The operating mechanism is an independent spring energy storage type, with manual and electric energy storage functions. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber and has a clamp plate structure.

Technical parameters of EVH1-40.5 new fixed sealed pole vacuum circuit breaker

serial number	Project			unit	Rated parameters
one	rated voltage			kV	forty point five
two	Rated insulation level	1-minute power frequency withstand voltage (effective value) for ground, phase to phase, and ordinary fracture surfaces		kV	ninety-five
		Lightning impulse withstand voltage (peak value) for ground, phase to phase, and ordinary fracture surfaces			one hundred and eighty-five
three	rated frequency			Hz	fifty
four	rated current			A	630, 1250, 1600, 2000, 2500
five	Rated short-time withstand current			kA	thirty-one point five
six	Rated peak withstand current			kA	eighty
seven	Rated short-circuit current duration			s	four
eight	Rated short-circuit closing current (peak)			kA	eighty
nine	Rated short-circuit breaking current		Effective value of communication component	kA	thirty-one point five
			Effective value of DC component		48%
ten	Rated operating sequence				Split -0.3s - Split -180s - Split - Split
eleven	Rated out of step breaking current			kA	eight
twelve	Rated out of phase breaking current				twenty-seven point three

[Indoor vacuum circuit breaker]EVH6-31.5 series railway specific single pole vacuum circuit breaker

2026-6-10 19:55:25

The EVH6-31.5 series railway specific single pole vacuum circuit breaker is an indoor single pole circuit breaker with a single-phase AC frequency of 50Hz and a rated voltage of 31.5kV. Specially used for railway substations and partition pavilions, for power supply, protection, and control of railway traction systems.
The circuit breaker adopts an integral layout, and the operating mechanism is an independent module with independent models. By adopting this form, the structure becomes simple and compact, and the mechanism can be individually packaged and then combined with the circuit breaker, greatly improving production efficiency and also greatly enhancing the mechanical operation reliability of the circuit breaker. The arc extinguishing chamber and operating mechanism of the circuit breaker are arranged in a front to back manner, with a reasonable structure and small volume.
The energy storage part, transmission part, buffering part, tripping part, and mechanical interlocking of the operating mechanism are all integrated into one, with only one output interface connected to the main circuit. The mechanism is composed of various forces in the mechanism, and the design will fully consider the effect of each force in the mechanism, making the arrangement of the transmission mechanism reasonable to ensure the minimum deformation of components. This not only ensures performance but also improves the reliability of the mechanism.

Technical parameters of EVH6-31.5 series railway specific single pole vacuum circuit breaker

serial number	Characteristic parameters			performance metrics
one	Rated voltage (kV)			thirty-one point five
two	Rated current (A)			two thousand and five hundred
three	Rated short-circuit breaking current (kA)			thirty-one point five
four	Rated short-circuit current breaking times (times)			thirty
five	Rated insulation level (before and after disconnection)	Rated lightning impulse withstand voltage (kV)	Alternating and relative to each other	two hundred and ten
			Between fracture surfaces	two hundred and ten
		Rated power frequency withstand voltage (kV 1min)	Alternating and relative to each other	one hundred and ten
			Between fracture surfaces	one hundred and ten
			Auxiliary circuit and control circuit	two
six	Rated dynamic stability current (kA peak)			eighty
seven	Rated thermal stability current (kA 4s)			thirty-one point five
eight	Rated short-circuit closing current (kA peak)			eighty
nine	Mechanical lifespan (times)			twenty thousand

[Indoor vacuum circuit breaker]EVH1-24/1250-31.5kV Indoor vacuum circuit breaker

2026-6-10 19:55:16

The EVH1-24/T1250-31.5 vacuum circuit breaker is an indoor device with a rated voltage of 12kV and a three-phase AC frequency of 50Hz. It can be used for controlling and protecting electrical facilities in industrial and mining areas, enterprises, power plants, and substations. This product complies with the relevant provisions of GB1984-2003 "High Voltage AC Circuit Breakers", JB3855 "Indoor High Voltage AC Vacuum Circuit Breakers", DL403 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breakers" and IEC62271-100:2001 "High Voltage AC Circuit Breakers".
The EVH1-24/T1250-31.5 series indoor high-voltage vacuum circuit breaker can be installed in both mobile and fixed switchgear. This circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard, low noise, and is suitable for harsh working conditions such as frequent operation.

Product Structure Features
The EVH1-24/T1250-31.5 vacuum circuit breaker arranges the arc extinguishing chamber and the operating mechanism on a shared frame, that is, an integrated layout. This structural design can make the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduce unnecessary intermediate transmission links, lower energy consumption and noise, and make the operating performance of the circuit breaker more reliable. The EVH1-24/T1250-31.5 indoor high-voltage vacuum circuit breaker can be installed in both mobile and fixed switchgear.
The main circuit of the circuit breaker adopts a structure in which a vacuum arc extinguishing chamber is sealed inside the insulated pole. The vacuum arc extinguishing chamber is longitudinally sealed inside a tubular insulation cylinder, which is cast using epoxy resin technology. This structural design not only prevents the vacuum arc extinguishing chamber from being damaged by external factors, but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.
The operating mechanism is an independent spring energy storage type, with manual and electric energy storage functions. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber and has a clamp plate structure.

Technical parameters of EVH1-24/1250-31.5kV indoor vacuum circuit breaker

serial number	Name		unit	Numerical value
one	rated voltage		kV	twenty-four
two	Rated insulation level	1-minute power frequency withstand voltage	kV	65
		Impulse withstand voltage (peak value)		125
three	rated current		A	one thousand two hundred and fifty
four	Rated short-circuit breaking current		kA	thirty-one point five
five	Rated short-circuit closing current (peak)			80
six	Rated peak withstand current			eighty
seven	Rated short-time withstand current			thirty-one point five
eight	Electrical lifespan		time	thirty
nine	Rated short-circuit current duration		s	four
ten	Rated operating sequence			Min-0.3s HeFen-180s HeFen
eleven	mechanical life		time	10000
twelve	Rated breaking current of a single capacitor bank		A	six hundred and thirty
thirteen	Rated back-to-back capacitor bank breaking current		A	four hundred

[Indoor vacuum circuit breaker]EVH4-15/T6300-80F Indoor High Voltage AC Generator Circuit Breaker

2026-6-10 19:55:08

The EVH4-15/T6300-80F indoor high-voltage AC generator circuit breaker is a three-phase AC 50Hz indoor device with a rated voltage of 15kV and a rated current of 6300A. It is suitable for installation between the generator and the step-up transformer or between the generator and the power plant auxiliary transformer, and can be used for the protection and control of power plant generator facilities. The EVH4-15 indoor high-voltage AC generator circuit breaker is a new generation high-capacity and high-performance product developed by Tianshui Changcheng Switchgear Co., Ltd. based on decades of experience in designing and manufacturing vacuum circuit breakers.

Product Structure Features
EVH4-15 type vacuum circuit breaker suitable for high voltage electrical disconnection system
1. The fixed installation of the vacuum circuit breaker at the outlet of the EVH4-15/T6300-80 (F) generator has a rated current of up to 6300A and a rated short-circuit breaking current of up to 80kA under natural air cooling.
2. The vacuum circuit breaker at the outlet of the EVH4-15/T5000-63 (F) generator has a removable handcart structure and can withstand a rated current of 5500A and a rated short-circuit breaking current of 63kA under natural air cooling.
3. The main circuit adopts a large creepage distance, longitudinal magnetic field contact structure, and a dedicated generator outlet vacuum arc extinguishing chamber. A voltage equalization ring with a uniform electric field is designed between the main circuit and the ground.
4. The main circuit of the vacuum circuit breaker at the outlet of the EVH4-15 generator adopts a pure copper welded structure for the upper and lower outgoing lines, reducing the contact resistance caused by the assembled structure. Use analysis software to analyze the current density of the main circuit and make it uniform; The surface area of the heat sink.
5. Adopting the innovative design of the GLS type spring operated mechanism specifically designed for EVH series vacuum circuit breakers, the mechanical performance is stable and reliable.
6. The transmission structure adopts an optimized slider straightening mechanism to ensure excellent mechanical characteristics and stable mechanical parameters.

Technical parameters of EVH4-15/T6300-80F indoor high-voltage AC generator circuit breaker

serial number	parameter name					unit	Numerical value
one	rated voltage					kV	fifteen
two	Rated insulation level (Phase to phase, ground to ground, fracture surface)			1-minute power frequency withstand voltage (effective value)	Alternating and facing the ground		fifty
					fracture		fifty-nine
				Lightning impulse withstand voltage (peak value)	Alternating and facing the ground		ninety
					fracture		one hundred and two
three	1-minute power frequency withstand voltage of auxiliary circuit					V	two thousand
four	rated frequency					Hz	fifty
five	rated current					A	6300*
six	temperature rise	Static end of vacuum arc extinguishing chamber				��	seventy-five
		Vacuum arc extinguishing chamber moving end					seventy-five
		Conductive clamp block for moving contact					seventy-five
		Soft connection terminal					seventy-five
		Outgoing terminal on the circuit breaker					sixty-five
		Bottom terminal of circuit breaker					sixty-five
seven	Rated short-time withstand current					kA	eighty
eight	Rated peak withstand current						two hundred and twenty
nine	Rated short-circuit duration					s	four
ten	Rated short-circuit breaking current					kA	eighty
eleven	DC component of rated short-circuit breaking current						77%
twelve	Rated short-circuit closing current (peak)					kA	two hundred and twenty
thirteen	Rated operating sequence						CO-30min-CO
fourteen	Rated out of step symmetrical breaking current					kA	40 (DC component �� 20%)
fifteen	Rated asynchronous asymmetric breaking current						40 (DC component �� 77%)
sixteen	Rated Out of Step Closing Current (Peak)						fifty-six point five
seventeen	Rated load (6300A) opening and closing times					time	fifty
eighteen	System source TRV		Expected transient recovery voltage rise rate			kV/��s	four
			peak voltage			kV	twenty-seven point six
			Initial polar coefficient				one point five
nineteen	Generator source TRV		Expected transient recovery voltage rise rate			kV/��s	one point eight
			peak voltage			kV	twenty-seven point six
			Initial polar coefficient				one point five
twenty	Combination and division time					ms	one hundred
twenty-one	Rated breaking time					ms	��60
twenty-two	mechanical life					time	five thousand
twenty-three	Allowable cumulative thickness of wear for dynamic and static contacts					mm	three
twenty-four	Electrical lifespan					time	five

[Indoor vacuum circuit breaker]Indoor vacuum circuit breaker

2026-6-10 19:54:59

ZN63G-24 indoor vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN73Y series indoor permanent magnet vacuum circuit breaker

2026-6-10 19:54:50

ZN73Y series indoor permanent magnet vacuum circuit breaker

[Indoor vacuum circuit breaker]CV2-40.5 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:54:41

CV2-40.5 Indoor High Voltage Vacuum Circuit Breaker

project			unit	data
model				CV2-40.5
Rated voltage Ur Rated voltage			kV	forty point five
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value)	ground-to-ground, interphase	kV	ninety-five
		Between fracture surfaces	kV	one hundred and eighteen
	Lightning impulse withstand voltage Up (peak)	ground-to-ground, interphase	kV	one hundred and eighty-five
		Between fracture surfaces	kV	two hundred and fifteen
rated frequency			Hz	fifty
rated current			A	630, 1250
Rated short-circuit breaking current Isc (effective value)			kA	25, 31.5
Rated peak withstand current Ip			kA	63, 80
Rated short-circuit closing current			kA	63, 80
Rated short-time withstand current Ik (effective value)			kA	25, 31.5
Rated short-circuit duration			s	four
Rated short-circuit current breaking times (times) (DL/T 402-2007)			time	thirty
Rated back-to-back capacitor bank breaking current Ibb (effective value)			A	four hundred
Rated breaking current Isb (effective value) of a single capacitor bank			A	six hundred and thirty
Rated cable charging breaking current I_c(Effective value)			A	fifty
Rated operating sequence				Automatic reclosing: O-0.3s-CO-180s-CO
				Non automatic reclosing: O-180s-CO-180s-CO
mechanical life			time	ten thousand
Classification: Mechanical life/Electrical life/Capacitive current breaking				M2/E2/C2

CV2-40.5 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]CV2-24 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:54:33

CV2-24 Indoor High Voltage Vacuum Circuit Breaker

project			unit	data
model				CV2-24
Rated voltage Ur			kV	twenty-four
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value)	ground-to-ground, interphase	kV	sixty-five
		Between fracture surfaces	kV	seventy-nine
	Lightning impulse withstand voltage Up (peak)	ground-to-ground, interphase	kV	one hundred and twenty-five
	Lightning impulse withstand voltage Up (peak)	Between fracture surfaces	kV	one hundred and forty-five
Rated frequency fr			Hz	fifty
Rated current Ir			A	630, 1250, 1600
Rated short-circuit breaking current Isc (effective value)			kA	25, 31.5
Rated peak withstand current Ip			kA	63, 80
Rated short-circuit closing current			kA	63, 80
Rated short-time withstand current Ik (effective value)			kA	25, 31.5
Rated operating sequence				Automatic reclosing: O-0.3s-CO-180-CO
Rated operating sequence				Non automatic reclosing: O-180s-CO-180-CO
Rated power supply voltage Uop for closing and opening devices			V	AC��110�� 220�� DC��110�� 220
Rated power supply voltage Ua of auxiliary circuit			V	AC��110�� 220�� DC��110�� 220
Rated short-circuit breaking current breaking times			time	twenty
mechanical life			time	ten thousand
Classification: Mechanical life/Electrical life/Capacitive current breaking				M2/E2/C2

CV2-24 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]CVR1-12 type indoor mounted high-voltage vacuum circuit breaker

2026-6-10 19:54:24

The CVR1-12 indoor mounted high-voltage vacuum circuit breaker is a new layout structure product developed to meet the requirements of the power supply department. Its width is only 380mm, and it is installed in 800mm wide fixed cabinets and ring main units together with isolation switches. It can be used for on-site control and protection of large equipment in industrial and mining enterprises, as well as in substation switching stations and other places.
Rated current of circuit breaker: 630A, 1250A

project		unit	data
model			CV1	CVR1
Rated voltage Ur		kV	twelve
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value) Fracture, phase to phase, ground to ground	kV	forty-two
	Lightning impulse withstand voltage Up (peak) Fracture, phase to phase, ground to ground	kV	seventy-five
Rated frequency fr		Hz	fifty
Rated current Ir		A	630, 1250, 1600, 2000, 2500, 3150, 4000	630, 1250
Rated short-circuit breaking current Isc (effective value)		kA	25, 31.5, 40, 50	25, 31.5
Rated peak withstand current Ip		kA	63, 80, 100, 125	63, 80
Rated short-circuit closing current		kA	63, 80, 100, 125	63, 80
Rated short-time withstand current Ik (effective value)		kA	25, 31.5, 40, 50	25, 31.5
Rated short-circuit duration tk		s	four
Rated back-to-back capacitor bank breaking current Ibb (effective value)		A	four hundred
Rated back-to-back capacitor bank closing inrush current Ibi (peak)		kA	20 (frequency 4250Hz)
Rated cable charging breaking current Ic (effective value)		A	twenty-five
Rated operating sequence			Automatic reclosing: O-0.3s-CO-180-CO
			Non automatic reclosing: O-180s-CO-180-CO
Rated power supply voltage Uop for closing and opening devices		V	AC��110, 220�� DC��110, 220
Rated power supply voltage Ua of auxiliary circuit		V	AC��110, 220�� DC��110, 220
mechanical life		time	1250-31.5 and below: 20000	ten thousand
			1250-31.5 and above: 10000
Classification: Mechanical life/Electrical life/Capacitive current breaking			M2/E2/C2

CVR1-12 indoor mounted high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]AV-3S-40.5 Outdoor AC Permanent Magnet High Voltage Vacuum Circuit Breaker

2026-6-10 19:54:15

AV-3S-40.5 Outdoor AC Permanent Magnet High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]AVBG-40.5 Sealed High Voltage Vacuum Circuit Breaker

2026-6-10 19:54:06

AVBG-40.5 Sealed High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VBG-40.5 Sealed Circuit Breaker

2026-6-10 19:53:57

VBG-40.5 Sealed Circuit Breaker

[Indoor vacuum circuit breaker]ZN23-40.5/2000-31.5 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:53:49

ZN23-40.5/2000-31.5 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZJUV1-12 series indoor vacuum circuit breaker

2026-6-10 19:53:40

The ZJUV1-12 series indoor vacuum circuit breaker is used as an indoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz, serving as a control and protection unit for power grid equipment and industrial and mining enterprise power equipment. Due to the special advantages of vacuum circuit breakers, this product is suitable for frequent operations that require rated working current, or for places where multiple short-circuit currents are disconnected.
This circuit breaker has the advantages of long service life, simple maintenance, no pollution, no explosion hazard, low noise, and is suitable for harsh working conditions such as frequent operation. Circuit breakers can be installed in both mobile switchgear and fixed switchgear.

The ZJUV1-12 series indoor vacuum circuit breaker adopts an overall layout structure, and the spring operating mechanism used is quite mature, with a simple structure and reliable performance. The chassis adopts a reasonable grid structure, which makes the layout of each functional unit clear and easy to maintain.

The ZJUV1-12 series indoor vacuum circuit breaker complies with relevant standards such as GB1984-2003, DL/T403-2000, JB3855-1996, etc.

[Indoor vacuum circuit breaker]ZN12-27.5B Single stage railway switch

2026-6-10 19:53:31

ZN12-27.5B single-stage railway switch is an indoor high-voltage switchgear with a rated voltage of 27.5kV and single-phase AC of 50Hz. This circuit breaker is of the handcart type and is equipped with handcart tracks and current transformers.

The ZN12-27.5B single-stage railway switch is suitable for various operating places such as substations, switching stations, partition pavilions, etc. with BT power supply mode of electrified railway traction power supply system.

Main technical parameters of ZN12-27.5B single-stage railway switch

serial number	project		unit	data
one	rated voltage		kV	twenty-seven point five
two	Maximum operating voltage		kV	thirty-one point five
three	Rated insulation level	One minute power frequency withstand voltage	kV	Normal type: 95 (110 between fracture surfaces) Plateau type: 110 (125 between fractures)
three	Rated insulation level	Lightning impulse (peak value)	kV	185 260
four	rated current		A	1250,2000
five	Rated short-circuit breaking current		kA	25,31.5
six	Rated short-circuit breaking current breaking times		time	thirty
seven	Rated Dan furnace closing current (peak value)		kA	63,80
eight	Rated short-circuit duration		S	four
nine	Rated operating sequence			Min-0.3s HeFen-180s HeFen
ten	closing time		ms	��75
eleven	Opening time		ms	��60
twelve	Rated breaking current of capacitor bank		A	six hundred and thirty
thirteen	mechanical life		time	twenty thousand
fourteen	Allowable cumulative thickness of wear for dynamic and static contacts		mm	four
fifteen	Rated current ratio of current transformer			75��2000/1.5
sixteen	Overall dimensions		mm	Height 1675, depth 1220, width 690
seventeen	Total weight		kg	two hundred and sixty

ZN12-27.5B single-stage railway switch operating mechanism parameters

serial number	project	unit	data
one	Rated power of energy storage motor	W	two hundred and seventy-five
two	Rated voltage of energy storage motor	V	AC:110 220 DC:110 220
three	Energy storage time under rated working voltage	S	��15
four	The rated voltage of the closing electromagnet is supplied by an independent power source, and the rated voltage of the opening electromagnet is also supplied	V	AC:110 220 DC:110 220
five	Rated current of overcurrent release device	A	five
six	Rated current of auxiliary switch	A	AC:10 DC:5
seven	Continuous current allowed to pass through microswitches	A	two
eight	Opening and closing current (DC220V, DC110V)	A	0.89,1.91

[Indoor vacuum circuit breaker]VBK10-24 Indoor vacuum circuit breaker

2026-6-10 19:53:22

The VBK10-24 vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 24kV and three-phase AC 50Hz. It is a product independently developed, designed, and manufactured based on the technology of Siemens AG in Germany. The operating mechanism of this circuit breaker consists of a spring energy storage mechanism, a locking mechanism, a release spring, a switch spindle, a buffer, and a control device.

[Indoor vacuum circuit breaker]VBK9-12 Indoor vacuum circuit breaker

2026-6-10 19:53:14

The VBK9-12 (ZN65A-12/T4000-63) indoor vacuum circuit breaker is a large capacity indoor AC high-voltage switchgear with a rated voltage of 12kV and three-phase AC 50Hz. It adopts a spring energy storage operating mechanism and can be operated by AC, DC or manual. The structure is simple, the performance is reliable, and it can be used as an outlet protection switch for small generators.

[Indoor vacuum circuit breaker]VBK8-12-EP(ZN65A-EP) Solid sealed pole vacuum circuit breaker

2026-6-10 19:53:05

The VBK8-12-EP solid sealed pole vacuum circuit breaker is developed and produced based on the ZN65A. It eliminates the phase partition, further improving its anti pollution and anti mechanical collision capabilities. It has the characteristics of simple and reliable structure, long service life, and maintenance free, and can be used as a control and protection switch for power plants, urban power grids, and operating enterprises.

VBK8-12-EP (ZN65A-EP) solid sealed pole vacuum circuit breaker

[Indoor vacuum circuit breaker]VBK7-12 Indoor vacuum circuit breaker

2026-6-10 19:52:56

VBK7-12 (ZN65A-12/T3150-40) indoor vacuum circuit breaker is an innovative product that absorbs foreign technology. It is suitable for indoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz. The operating mechanism is a spring energy storage type. It has the characteristics of simple structure, strong breaking ability, long service life, complete operating functions, and easy maintenance, and can be used for small generator protection switches.

[Indoor vacuum circuit breaker]VBK6-40.5 Indoor vacuum circuit breaker

2026-6-10 19:52:47

VBK6-40.5 (ZN65A-12/T2000-31.5) indoor vacuum circuit breaker is an ultra long life indoor high-voltage electrical equipment with a rated voltage of 40.5kV and three-phase AC 50Hz. Its outstanding feature is that its mechanical life can reach 120000 times, suitable for distribution systems such as working enterprises and substations, as control and protection switches; Especially suitable for industries such as metallurgical arc steelmaking that require frequent operations, as a control and protection equipment.

[Indoor vacuum circuit breaker]VBK5-40.5 Indoor vacuum circuit breaker

2026-6-10 19:52:39

The VBK5-40.5 (ZN12-40.5) indoor vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 40.5kV and three-phase AC 50Hz. It is manufactured using Siemens 3AF technology. Strong breaking ability, long mechanical life, superior technical performance, and can also be used as control and protection switches for power plants, substations, and other transmission and distribution systems, especially suitable for places with frequent operations.

[Indoor vacuum circuit breaker]VBK4-12 Indoor vacuum circuit breaker

2026-6-10 19:52:29

The VBK4-12 (ZN65A-12/T1250-31.5) indoor vacuum circuit breaker is suitable for indoor high-voltage equipment with a rated voltage of 12kV and three-phase AC 50Hz. Its breaking capacity reaches 100 times, which is at the leading level in China. Suitable for use as control and protection switches in power plants, substations, and other transmission and distribution systems, especially in places where important loads are disconnected and frequent operations occur.

[Indoor vacuum circuit breaker]VBK3-12 Indoor vacuum circuit breaker

2026-6-10 19:52:20

VBK3-12 (ZN65A-12/T1250-25) indoor vacuum circuit breaker is a new economical circuit breaker. Its structure is a spring energy storage operating mechanism, suitable for power systems with a rated voltage of 12kV and three-phase AC 50Hz. Suitable for control and protection switches in power transmission and distribution systems and industrial and mining enterprises, especially in places with frequent operations.

[Indoor vacuum circuit breaker]VBK2-12(ZN12-12) AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:52:12

The VBK2-12 (ZN12-12) AC high-voltage vacuum circuit breaker is a product manufactured using 3AF technology from Siemens AG in Germany. It has a simple structure and stable performance. This includes all industrial and mining products, high-altitude products, low-temperature products, and three proof products. Suitable for use as control and protection switches in power plants and substations, especially in places where important loads are disconnected and frequent operations are carried out.

[Indoor vacuum circuit breaker]VBK1-12 Indoor vacuum circuit breaker

2026-6-10 19:52:03

The VBK1-12 (ZN63A-12G) indoor vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 12kV and three-phase AC 50Hz. It adopts a composite insulation method, and the vacuum arc extinguishing chamber is installed in a three-phase independent insulation cylinder. Therefore, the arc extinguishing chamber can reduce the influence of external environment and mechanical damage. Has strong anti pollution ability.

[Indoor vacuum circuit breaker]MZG32-40.5 Outdoor AC High Voltage Isolation Switch

2026-6-10 19:51:54

MZG32-40.5, 72.5, 126 (W) III/630, 1250, 1600, 2000 double column horizontal break V-shaped horizontal rotary outdoor three-phase AC high voltage isolation switch is used for switching high voltage lines under no-load conditions, as well as for electrically isolating high voltage electrical equipment such as high voltage busbars and circuit breakers under maintenance from live high voltage lines.

Structural features:
1. Environmental temperature: -40 �� to+40 ��;
2. Altitude: not exceeding 2000m;
3. The environmental pollution levels are II, III, and IV;
4. The thickness of ice cover shall not exceed 10mm;
5. The wind pressure does not exceed 700Pa;
6. Earthquake intensity: areas below 8 degrees;
7. The installation site should be free from flammable, explosive hazards, chemical corrosion, and severe vibrations.

MZG32-40.5 outdoor AC high voltage isolation switch model meaning

Main technical parameters of MZG32-40.5 outdoor AC high voltage isolation switch

Appearance and installation dimensions

MZG32-40.5 Outdoor AC High Voltage Isolation Switch

[Indoor vacuum circuit breaker]MZG13-12 Outdoor AC High Voltage Isolation Switch

2026-6-10 19:51:45

MZG13-12 outdoor single pole isolation switch (hereinafter referred to as the switch) is suitable for 10kV high-voltage transmission and distribution lines, used to cut off and close single-phase or three-phase circuits with no load and voltage. The switch is designed for single-phase use in three-phase systems, and its structure is simple, economical, and easy to use. The rated current of the switch is 200; 400�� 600 and 1000A. They are both composed of a base, post insulators, conductive parts, and mechanism parts. Adopting a knife type structure to open and close the circuit. Each phase switch blade is composed of two conductive blades, and compression springs are installed on both sides of the blades. Adjusting the height of the springs can obtain the contact pressure required for the switch blade. The insulation operating mechanism can be used to perform closing movement when opening and closing the switch. The knife switch has a self-locking device.

Structural features:
1. Altitude not exceeding 1000m;
2. Environmental humidity: The maximum environmental humidity shall not exceed+40 ��, and the minimum environmental humidity shall not be lower than -30 ��;
3. Outdoor wind speed not exceeding 35m/s;
4. The seismic intensity shall not exceed 8 degrees;
5. The installation site should be free of gases, vapors, chemical deposits, dust, dirt, and other explosive or corrosive media that seriously affect the insulation and conductivity of the switch;
6. The installation site should be free from frequent and severe vibrations.

MZG13-12 outdoor AC high voltage isolation switch model meaning

Main technical parameters of MZG13-12 outdoor AC high voltage isolation switch

MZG13-12 Outdoor AC High Voltage Isolation Switch

[Indoor vacuum circuit breaker]MZZ8-40.5 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:51:36

MZZ8-40.5 series indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor device with a rated voltage of 40.5kV, equipped with a dedicated 3AV3 spring mechanism. The circuit breaker can be configured in JYN1-10.5 (Z) movable metal enclosed switchgear or KYN61-40.5 assembled metal enclosed switchgear, and is currently the most ideal circuit breaker in 40.5KV devices. This series of products has high technical parameters, strong breaking ability, and reliable action. Stable performance, long lifespan, easy maintenance, and no explosion hazard or pollution. It is used for the protection and control of single busbar electrical facilities in industrial and mining enterprises, power plants, and substations, and is suitable for frequent operation places. It can also be used for special occasions such as capacitor banks. This product adopts an integrated and modular design, with a simple and reasonable overall structure. It is arranged vertically, with the arc extinguishing chamber on top and the interlocking and operating mechanism on the bottom. Using a dedicated 3AV3 spring operated mechanism, there is no need for adjustment, and the action is stable and reliable. The vacuum arc extinguishing chamber is arranged inside a closed insulation cylinder, which improves the insulation performance and reduces the overall size.

Structural features:
1. Environmental temperature: upper limit+40 ��, lower limit -15 ��. -25 �� in high-altitude regions;
2. The average daily relative humidity does not exceed 95%; The average daily water vapor pressure shall not exceed 2.2kPa, and the average monthly relative humidity shall not exceed 90%; The average monthly water vapor pressure shall not exceed 1.8kPa.
3. Altitude: 1000m;
5. The seismic intensity shall not exceed 8 degrees;
6. Not suitable for places with flammability, explosion, hazardous chemical corrosion, and severe vibration.

MZZ8-40.5 series indoor high-voltage vacuum circuit breaker model meaning

[Indoor vacuum circuit breaker]Indoor AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:51:27

MZ63A-12 (VS1) indoor AC high-voltage vacuum circuit breaker, suitable for three-phase AC 50Hz, rated voltage of 7.2KV~12KV power system. Widely used in various types of loads and frequent operations, it plays a protective and control role for electrical equipment in industrial and mining areas, enterprises, power plants, and substations. It can be used with KYN28A-12 (GZS1) and other mid mounted handcart switch cabinets, as well as XGN - �� fixed switch cabinets. This product complies with the national standards GB1984 "AC High Voltage Circuit Breaker", JB3855 "3.6-40.5KV Indoor AC High Voltage Vacuum Circuit Breaker", and IEC60056 "High Voltage AC Circuit Breaker". Meet the technical requirements for ordering 10-35KV indoor high-voltage vacuum circuit breakers (DL/T403).

Structural characteristics of MZ63A-12 (VS1) indoor AC high-voltage vacuum circuit breaker:
1. Altitude: not exceeding 1000m;
2. Environmental temperature: maximum temperature+40 ��, minimum temperature -15 �� (storage and transportation allowed at -30 ��)
3. Environmental temperature: Daily average relative humidity: �� 95% Monthly average relative humidity: �� 90% Daily average saturated vapor pressure: �� 2.2 × KPa Monthly average saturated vapor pressure: �� 1.8 × KPa

MZ63A-12 (VS1) Indoor AC High Voltage Vacuum Circuit Breaker Model Meaning

[Indoor vacuum circuit breaker]MZZ61-12 series vacuum circuit breaker

2026-6-10 19:51:18

The MZZ61-12 series vacuum circuit breaker is a high-voltage indoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz. This product complies with GB1984-89 standard, and its overall structure consists of two forms: integrated installation of switch body and operating mechanism, and separate installation of switch body and operating mechanism. The integrated structure is the basic type of MZZ61-12. The split structure is MZZ61A-12 type, suitable for various fixed switchgear such as GG-1A (Z), XGZ2A10 (Z), etc. This product can be equipped with CD17 and CD10A DC electromagnetic operating mechanisms, as well as CT17 and CT19 spring energy storage operating mechanisms.

Structural characteristics of MZZ61-12 series vacuum circuit breaker:
Model meaning

Working and environmental conditions
1. Environmental temperature: upper limit+40 ��, lower limit -15 ��.
2. Altitude: 1000m;
3. The daily average relative humidity of the air is not more than 95%, and the monthly average is not more than 90%. The daily average saturated vapor pressure is not greater than 2.2 × 10-3MPa,
The monthly average value shall not exceed 1.8 × 10-3MPa.
4. The seismic intensity shall not exceed 8 degrees;
5. The place of use is free from condensation, flammability, explosiveness, severe pollution, chemical corrosion, and severe vibration.

Main parameters of MZZ61-12 series vacuum circuit breaker

Appearance and installation dimensions
Figure 1MZZ61-12 Outline Dimensional Drawing of Vacuum Circuit Breaker

Figure 2: Dimensions of MZZ61-12/T Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:51:09

The MZZ7-24 indoor AC high-voltage vacuum circuit breaker is the latest generation of serialized 24kV vacuum circuit breakers developed by our company with reference to domestic and foreign technology research. The main design concept is to use solid sealed insulation performance as the main electrical circuit, improve the design operating mechanism, and ensure stable insulation performance, mechanical reliability, and significantly improved breaking performance of the circuit breaker, truly achieving maintenance free and longer mechanical and electrical life. And without explosion hazard and pollution, it is used for the protection and control of single busbar electrical facilities in industrial and mining enterprises, power plants, and substations, and is suitable for frequent operation places. It can also be used for special occasions such as capacitor banks.

Structural features:
This product complies with the national standards GB1984-2003 "AC High Voltage Circuit Breaker" and IE62271-100 "AC High Voltage Circuit Breaker". Meet the technical requirements for ordering 10-35kV indoor high-voltage vacuum circuit breakers (DL/T403).

MZZ7-24 indoor AC high-voltage vacuum circuit breaker model meaning

environmental conditions
Altitude: not exceeding 1000m;

Environmental temperature: maximum temperature+40 ��, minimum temperature -15 �� (storage and transportation allowed at -30 ��)

Environmental humidity: Daily average relative humidity: �� 95%
Monthly average relative humidity: �� 90%
Daily average saturated vapor pressure: �� 2.2 × KPa;
Monthly average saturated vapor pressure: �� 1.8 × KPa

Main technical parameters
1. Main technical parameters of MZZ7-24

name		unit	data
rated voltage		Kv	twenty-four
rated frequency		HZ	50/60
Rated insulation level	1-minute power frequency withstand voltage	KV	sixty
	Lightning impulse withstand voltage	Hz	one hundred and twenty-five
rated current		A	1250-3150
Rated short-circuit withstand current (4S)		KA	twenty	twenty-five	thirty-one point five
Rated peak withstand current		KA	fifty	sixty-three	eighty
Rated short-circuit breaking current		KA	twenty	twenty-five	thirty-one point five
Rated closing current		KA	fifty	sixty-three	eighty
Rated short-circuit breaking times		time	thirty
Rated short-circuit duration		second	four
Secondary circuit power frequency withstand voltage (1min)		V	two thousand
Rated capacitor group breaking current		A	400/630
Rated operating sequence			O-0.3s-CO-180s-CO
mechanical life		time	2000 (60000 cycles for magnetic permanent magnet mechanism)

2. MZZ7-24 mechanical characteristic parameters

name	unit	data
Contact opening distance	mm	14±1
overstroke	mm	3.5±1
Bouncing time of closing contact	ms	��2
Three phase asynchronous opening and closing	ms	��2
Average opening speed	ms	1.0±0.2
Average closing speed	m/s	1.3±0.2
Opening time	ms	35-70
closing time	ms	20-50
Main electrical circuit resistance	�̦�	630A 1250A one thousand and six hundred 2000A two thousand and five hundred 3150A	��50�̦� ��45�̦� ��35�̦� ��35�̦� ��30�̦� ��25�̦�
Rated power of energy storage motor	W	eighty
Energy storage time	s	<10

Appearance and installation dimensions

MZZ7-24 Indoor AC High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:51:01

MZZ6-12 indoor AC high-voltage vacuum circuit breaker, suitable for three-phase AC 50Hz, rated voltage of 7.2kV~12kV power system. Widely used in various types of loads and frequent operations, it plays a protective and control role for electrical equipment in industrial and mining areas, enterprises, power plants, and substations. It can be used with KYN28A-12 (GZS1) and other mid mounted handcart switch cabinets, as well as XGN - �� fixed switch cabinets.

The MZZ6-12 indoor AC high-voltage vacuum circuit breaker complies with the national standards GB1984 "AC High Voltage Circuit Breaker", JB3855 "3.6-40.5KV Indoor AC High Voltage Vacuum Circuit Breaker", and IEC60056 "AC High Voltage Circuit Breaker". Meet the technical requirements for ordering 10-35KV indoor high-voltage vacuum circuit breakers (DL/T403).

Structural features:
Model meaning

environmental conditions
Altitude:
Not exceeding 1000m;

Ambient temperature
Maximum temperature+40 ��, minimum temperature -15 �� (storage and transportation allowed at -30 ��)

ambient humidity:
Daily average relative humidity: �� 95%
Monthly average relative humidity: �� 90%
Daily average saturated vapor pressure: �� 2.2 × KPa
Monthly average saturated vapor pressure: �� 1.8 × KPa

Main electrical parameters
1. Main technical parameters of MZZ6-12 vacuum circuit breaker

name		unit	data
rated voltage		Kv	twelve	twelve	twelve	twelve	twelve
rated frequency		HZ	fifty	fifty	fifty	fifty	fifty
rated current		A	630, 1250	630, 1250	630, 1250, 1600	1250, 1600, 2000	2000, 2500, 3150
Rated insulation level	1-minute power frequency withstand voltage	KV	forty-two	forty-two	forty-two	forty-two	forty-two
Rated insulation level	Rated lightning impulse withstand voltage	KV	seventy-five	seventy-five	seventy-five	seventy-five	seventy-five
Rated short-circuit breaking current		KA	sixteen	twenty	twenty-five	thirty-one point five	forty
Rated short-circuit closing current (peak)			forty	fifty	sixty-three	eighty	one hundred
Rated (peak) withstand current			forty	fifty	sixty-three	eighty	one hundred
Rated short-circuit withstand current			sixteen	twenty	twenty-five	thirty-one point five	forty
Rated short-circuit breaking current breaking times			fifty	fifty	fifty	fifty	thirty
Rated short-circuit duration		second	four	four	four	four	four
Secondary circuit power frequency withstand voltage (1min)		V	two thousand	two thousand	two thousand	two thousand	two thousand
Rated operating sequence			O-t-CO-t1-Co
mechanical life			thirty thousand	thirty thousand	thirty thousand	thirty thousand	ten thousand

*16KA��20KA��25KA��31.5KA��t1=180s; 40kA��t=180s��t1=180s

3. Mechanical characteristic parameters of MZZ6-12 vacuum circuit breaker

name		unit	data
Contact opening distance		mm	11±1	11±1	11±1	11±1	11±1
overstroke		mm	3±0.5	3±0.5	3±0.5	3±0.5	3±0.5
Three phase asynchronous opening and closing		ms	<=2	<=2	<=2	<=2	<=2
Bouncing time of closing contact		ms	<=2	<=2	<=2	<=2	<=2
Distance from center to center			210±1.5	210±1.5	210±1.5	210±1.5	210±1.5
Closing contact distance pressure		N	16KA	20KA	25KA	31.5KA	40KA
			200±200	2400±200	2400±200	3100±200	4250±250
Average opening speed		ms	1.1±0.2
Average closing speed		m/s	0.6±0.2
Opening time, when the operating voltage is	highest	ms	��50
	rated		��60
	minimum		��60
closing time		ms	��100
Allowable wear thickness for light accumulation of moving and stationary contacts		mm	three
Main electrical circuit resistance		�̦�	630A 1250A 1600-2000A 2500-3150A 4000A		��50�̦� ��45�̦� ��35�̦� ��25�̦� ��20�̦�
Rated power of energy storage motor		W	70(40KA 100W)
Energy storage time		s	<10

4. Technical data of opening and closing coils

	trip coil	closing coil	Remarks
Rated operating voltage (V)	DC220,DC110; AC220,AC110	DC220,DC110; AC220,AC110	The opening coil is less than 30% rated operating power When pressing, do not open the switch
Coil power (W)	two hundred and forty-five	two hundred and forty-five
Normal operating voltage range	65% to 120% rated voltage	85% to 110% rated voltage

Exterior installation dimensions

MZZ6-12 Indoor AC High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VKP-24-2500-31.5 High Voltage Vacuum Circuit Breaker

2026-6-10 19:50:52

The rated parameters, design structure, technical requirements, inspection and testing, labeling, packaging, transportation, and storage of VKP-24/2500-31.5 indoor AC high-voltage vacuum circuit breaker.

Reference standards
GB/T11022-1999 Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards
GB1984-2003 High Voltage AC Circuit Breakers
GB/T3309-1989 "Mechanical Testing of High Voltage Switchgear at Room Temperature"
DL/T402-1999 Technical Conditions for Ordering AC High Voltage Circuit Breakers
JB/T8738-1998 "Vacuum arc extinguishing chamber for 3.6-40.5KV AC high voltage switchgear"
JB3855-1996 "3.6-40.5KV Indoor AC High Voltage Vacuum Circuit Breaker"

Rated Parameters of VKP-24-2500-31.5 High Voltage Vacuum Circuit Breaker (Table 1)

Environmental conditions for use
1. Environmental temperature
Maximum temperature:+40 ��;
Minimum temperature: -15 ��;
The daily average temperature does not exceed+35 ��.
2. Environmental humidity
Relative humidity: daily average �� 95%, monthly average �� 90%;
Water vapor pressure: daily average �� 2.2KPa, monthly average �� 1.8KPa.
The altitude of the equipment installation site shall not exceed 1000 meters.
4. Places without flammability, explosiveness, chemical corrosion, and severe vibration;
The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6KV
Design, Structure, and Technical Requirements
Vacuum arc extinguishing chamber: The structural dimensions shall meet the technical requirements, and the technical parameters shall comply with JB/T8738-1998 "Vacuum arc extinguishing chamber for 3.6-40.5KV AC high voltage switchgear".
Operating mechanism: Spring energy storage operating mechanism, with manual and electric closing and opening operation functions.
The mechanism is equipped with anti jumping devices, trip devices, operation frequency recorders, and opening and closing indicator devices, and can be equipped with overcurrent trip devices and voltage loss trip devices.

Technical parameters of the institution

Energy storage operation: When the operating voltage is between 85% and 110% of the rated voltage, the circuit breaker should ensure normal energy storage.
Tripping operation: Its reliable operating voltage should be 65% -120% of the rated voltage value. When the rated voltage value is lower than 30%, the release should not engage.
The energy storage handle used for manual energy storage mechanisms should not exceed 150mm.
The frame of a fixed circuit breaker should be equipped with a grounding thread no larger than M12 and marked with a grounding symbol.
There should be reliable mechanical interlocking between the chassis of the handcart circuit breaker and the operating mechanism of the circuit breaker.
The assembly and adjustment of circuit breakers should meet the parameter requirements in the following table.

Test content, methods, and inspection rules
The test includes type test and factory test
type test

[Indoor vacuum circuit breaker]VKP-12 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:50:43

The ZN73A (VKP) -12 indoor AC high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz indoor high-voltage switchgear with a rated voltage of 7.2-12KV. The circuit breaker complies with Chinese standards GB/T1984 "High Voltage AC Circuit Breakers", JB3855 "3.6-40.5KV Indoor AC High Voltage Vacuum Circuit Breakers" and relevant IEC standards, and has reliable interlocking function.
Circuit breakers can operate frequently and have the ability to open and close multiple times and quickly reclose.
The circuit breaker is designed as a front and rear split structure, which can be used as a fixed installation unit or as a separate handcart with the chassis.

Main technical parameters of VKP-12 indoor high-voltage vacuum circuit breaker
Mechanical characteristic parameters of circuit breaker

Mechanical characteristic parameters of circuit breaker

Note: The average closing and opening speed refers to the average speed at which the contact is fully open

Figure 1 Dimensions of Handcart ZN73-12: Rated current>1600A, dimensions in parentheses indicate rated current �� 1600A

Figure 1 Fixed ZN73-12 external dimension diagram: rated current>1600A, dimensions in parentheses indicate rated current �� 1600A

VKP-12 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:50:34

VS1-40.5 indoor high-voltage vacuum circuit breaker is mainly used in three-phase AC 50Hz power systems with a rated voltage of 40.5kV. It can be used for protection and control in industrial and mining enterprises, power plants, and substations, especially suitable for various frequent operating places. This product complies with the requirements of GB11022 "Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards", GB1984 "AC High Voltage Circuit Breakers", IEC56 "High Voltage AC Circuit Breakers" and other standards.

Main technical parameters of VS1-40.5 indoor high-voltage vacuum circuit breaker (indoor high-voltage vacuum circuit breaker VS-40.5 type)

serial number	project	unit	Technical Specifications
one	Contact opening distance	mm	18~20
two	overstroke		3~5
three	Allowable wear thickness of contacts		three
four	Average opening speed (8mm after contact separation)	m/s	1.0~1.5
five	Average closing speed (12mm before contact closure)		0.5~0.9
six	Contact closing bounce time		��3
seven	Three phase asynchronous disconnection		��2
eight	Three phase closing asynchrony	ms	��2
nine	closing time		��90
ten	Opening time		��60
eleven	DC resistance of each phase conductive circuit (between the upper and lower plum blossom contacts)	�̦�	1250A	1600A��2000A
			��50	��40
twelve	Interphase center distance	mm	300±2

serial number	project		unit	Technical Specifications
one	rated voltage		kV	forty point five
two	Rated insulation level	1-minute power frequency withstand voltage		ninety-five
		Lightning impulse withstand voltage (peak value)		one hundred and eighty-five
three	rated current		A	630��1250��1600��2000
four	Rated short-circuit breaking current		kA	twenty	twenty-five	thirty-one point five
five	Rated short-circuit closing current (peak)			fifty	sixty-three	eighty
six	Rated operating sequence			0-0.3s-Co-180s-Co
seven	Rated out of step breaking current		kA	five	six point two five	eight
eight	Rated out of phase short circuit opening and closing			seventeen point four	twenty-one point seven	twenty-seven point four
nine	Average DC component of rated short-circuit breaking current			��48%
ten	Rated breaking current of capacitor bank		A	four hundred
eleven	Rated short-circuit duration		S	four
twelve	Rated short-circuit breaking current breaking times		time	twenty
thirteen	Cut off time		ms	��80
fourteen	mechanical life		time	twenty thousand
fifteen	Circuit breaker quality		Kg	two hundred and sixty

VS1-40.5 Indoor High Voltage Vacuum Circuit Breaker Appearance and Installation Dimensions (Indoor High Voltage Vacuum Circuit Breaker VS-40.5 Type)

[Indoor vacuum circuit breaker]ZN63M-12 series indoor high-voltage permanent magnet vacuum circuit breaker

2026-6-10 19:50:25

I. Overview
The ZN63M-12 series indoor high-voltage permanent magnet vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz indoor high-voltage switchgear with a rated voltage of 12KV.
The ZN63M-12 series indoor high-voltage permanent magnet vacuum circuit breaker is a new type of indoor switchgear independently developed by our company. It mainly consists of three parts: the vacuum circuit breaker body, the controller, and the external high-voltage transformer. It has functions such as fault detection, protection control, and remote communication. The controller adopts advanced DSP chips and embedded operating systems, integrating control and protection. The controller has an RS485 interface and can be equipped with a remote communication module to meet the needs of remote communication and distribution automation in the power system, completing the four remote functions.

The ZN63M-12 series indoor high-voltage permanent magnet vacuum circuit breaker adopts a permanent magnet operating mechanism, with long service life, high reliability, and maintenance free. Suitable for exit switches of urban and rural power grid substations, segmented switches and branch switches of main lines, and user entrance switches.

[Indoor vacuum circuit breaker]VD4 series indoor vacuum circuit breaker

2026-6-10 19:50:17

VD4 vacuum circuit breaker is an indoor switchgear component insulated with air.

The circuit breaker complies with the provisions of GB1984, DL/T403, German DINVDE0670, IEC60056, 60694 and other standards. Whether under normal use conditions or fault conditions (especially short-circuit situations), as long as it is within the technical parameter range, the circuit breaker can ensure safe and reliable operation. VD4 vacuum circuit breaker can perform frequent operations or multiple short circuit current disconnections within the working current range. VD4 vacuum circuit breaker is suitable for reclosing operation and has extremely high operational reliability and service life.
The VD4 vacuum circuit breaker adopts a vertical insulation sleeve to resist the influence of various climates; And in terms of maintenance and upkeep, it is usually only necessary to occasionally clean or lubricate the operating mechanism.
The installation form of VD4 vacuum circuit breaker in the switchgear can be fixed, removable, or installed on the frame for use.

Project		unit	Data
rated voltage		kV	three point six
maximum voltage		kV	3.6 7.2 12
Rated insulation level voltage	1-minute power frequency withstand voltage	kV	forty-two
Rated insulation level voltage	Lightning impulse withstand voltage	kV	seventy-five
rated frequency		Hz	fifty
rated current		A	630��1250��1600��2000��2500��3150
Rated symmetrical short-circuit breaking current (effective value)		A	16��20��25��31.5��40��50
4S thermal stability current (effective value)		KA	16��20��25��31.5��40��50
Rated dynamic stability impulse current (peak value)		KA	40��50��63��80��100��125

[Indoor vacuum circuit breaker]VMD1-12KV/1250A Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:50:08

VMD1-12VV/1250A Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VMD2-12KV Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:49:59

VMD2-12KV Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VMD4-24KV Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:49:51

VMD4-24KV Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VMD5-40.5 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:49:42

The VMD5-40.5 indoor high-voltage vacuum circuit breaker has a new generation of 40.5kV vacuum circuit breakers that are at the forefront of domestic technology. Its main feature is the use of an upper and lower layout structure, effectively reducing the depth of the circuit breaker. The circuit breaker adopts a composite insulation (or solid sealed insulation) structure, which meets the requirements of air distance and creepage distance under normal operating conditions, effectively reducing the volume of the circuit breaker. The operating mechanism is a new type of spring operated mechanism.

The technical parameters comply with GB1984, GB/T11022, and the Chinese power industry standard DL403, as well as the regulations of IEC62271-100, IEC56 standards and other relevant standards of major industrialized countries.

VMD5-40.5 indoor high-voltage vacuum circuit breaker can be widely used in power plants, power grids, metallurgy, petrochemicals, urban infrastructure construction, such as airports, buildings, subways, etc.

[Indoor vacuum circuit breaker]VTK-40.5 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:49:33

The VTK-40.5 series indoor high-voltage vacuum circuit breaker is a brand new product independently developed by Taikai. It combines the highest quality vacuum arc extinguishing chamber with the most advanced permanent magnet operating mechanism, and has the advantages of high parameters, high performance, and long service life. It is particularly suitable for frequent operation and poor environmental conditions.

Key Features:
1. The Xi'an High Voltage Apparatus Research Institute has passed a complete set of type tests with complete parameter specifications;
2. For E2 level circuit breakers (with extended electrical life), the product has undergone 274 short-circuit current breaking tests and does not require maintenance;
3. For M2 level circuit breakers (with extended mechanical life), the permanent magnet mechanism has an ultra-high life of 100000 cycles, and the entire circuit breaker can withstand up to 60000 cycles without the need to replace the arc extinguishing chamber;
4. For the C2 level circuit breaker, the product has undergone a complete set of tests on the breaking capacitor bank at the Shaoxing test station, and has a very low breakdown rate;
5. The product fully meets domestic and international standards such as GB1984-2003, GB/T11022-2001, DL/T403-2001, IEC62271-100:2001, etc;
6. The product installation plan is flexible and can be assembled into fixed, handcart, or center mounted structures, suitable for various fixed switch devices such as XGN and KGN, as well as various movable switch devices such as KYN61, GBC, JYN1, etc., all of which can easily meet the five prevention requirements.

Main technical parameters of VTK-40.5 series indoor high-voltage vacuum circuit breaker:

serial number	project	unit	Parameters
one	rated voltage	kV	forty point five
two	Power frequency withstand voltage (1min)	kV	ninety-five
three	Lightning impulse withstand voltage (peak value)	kV	one hundred and eighty-five
four	rated frequency	Hz	fifty
five	rated current	A	1250, 1600, 2000, 2500
six	Rated short-circuit breaking current	kA	twenty-five	thirty-one point five
seven	4s rated short-time withstand current	kA	twenty-five	thirty-one point five
eight	Rated peak withstand current (peak)	kA	sixty-three	eighty
nine	Rated short-circuit closing current (peak)	kA	sixty-three	eighty
ten	Rated capacitor group breaking current	A	four hundred
eleven	mechanical life	time	sixty thousand
twelve	Rated short-circuit current breaking times	time	two hundred and seventy-four
thirteen	Rated operating sequence		Min-0.3 s - HeFen-180 s - HeFen

Ordering Instructions:
1. Name, model, specifications, quantity, and delivery time of the circuit breaker;
2. Voltage of energy storage motor and operating voltage of closing and opening coils;
3. Names and quantities of spare parts and components;
4. If the user has any other requirements, they can specify them when placing an order.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:49:24

Overview:
The VS1-12 series indoor high-voltage vacuum circuit breaker is mainly used in 12kV power systems as a protection and control unit for power equipment in power plants, substations, and industrial and mining enterprises. Suitable for frequent operating places.

Key Features:
1. The circuit breaker arranges the arc extinguishing chamber and the spring operating mechanism as a unified whole. This structural design makes the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduces unnecessary intermediate links, lowers energy consumption and noise, and greatly improves the operating performance of the circuit breaker.
2. The arc extinguishing chamber is a ceramic insulated shell with a large creepage distance, using copper chromium contacts, cup-shaped longitudinal magnetic structure, and large breaking capacity.
3. The primary conductive circuit of the circuit breaker is installed inside an insulation cylinder made of epoxy resin cast using APG technology, effectively preventing external factors such as external impact and polluted environment from affecting the arc extinguishing chamber.
4. The maximum rated current reaches 5000A, and the rated short-circuit breaking current reaches 50kA, which are the highest parameters in China.

Main technical parameters of VS1-12/5000-50 indoor high-voltage vacuum circuit breaker:

serial number	project	unit	Numerical value
one	rated voltage	kV	twelve
two	Power frequency withstand voltage (1min)		forty-two
three	Lightning impulse withstand voltage (peak value)		seventy-five
four	rated frequency	Hz	fifty
five	rated current	A	630, 1250, 1600, 2000, 2500, 3150, 4000, 5000
six	Rated short-circuit breaking current (effective value)	kA	twenty	twenty-five	thirty-one point five	forty	fifty
seven	Rated short-time withstand current (effective value)	kA	twenty	twenty-five	thirty-one point five	forty	fifty
eight	Rated short-circuit current duration	S	four
nine	Rated peak withstand current (peak)	kA	fifty	sixty-three	eighty	one hundred	one hundred and twenty-five
ten	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty	one hundred	one hundred and twenty-five
eleven	Rated breaking current of single/back-to-back capacitor bank	A	630/400
twelve	mechanical life	time	twenty thousand
thirteen	Rated short-circuit current breaking times	time	thirty			twenty
fourteen	Rated operating sequence		��			��
�� Min-0.3 s - HeFen-180 s - HeFen �� Min-180s - HeFen-180 s - HeFen

Forced air cooling is required for temperatures above 4000A
Ordering Instructions:
1. Name, model, specifications, quantity, and delivery time of the circuit breaker;
2. Select the control circuit schematic and rated operating voltage;
3. Configuration scheme for overcurrent protection and closing locking components;
4. Names and quantities of spare parts and components;
5. If the user has any other requirements, they can specify them when placing an order.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:49:16

1. Overview
The CV2-12 indoor high-voltage vacuum circuit breaker has undergone strict reliability testing and passed the full project type test. It is suitable for AC 50Hz, rated voltage 12kV, and rated current 630A~1250A, and is used for protection and control of power lines and power equipment in industrial and mining enterprises.

There are fixed and handcart types, and the handcart type is suitable for armored central cabinets such as KYN28A. Strict cabinet matching tests ensure interchangeability;
Rated power frequency withstand voltage of 42kV/1min, rated lightning impulse withstand voltage of 75kV;
Rated short-circuit breaking current 25kA~31.5kA, rated short-time withstand current 25kA~31.5kA/4s;
Adopting the APG process of first-class manufacturers to seal the pole, maintenance free, adaptable to a wide range of environments, safe and reliable, suitable for frequent operation or multiple breaking of short-circuit currents;
Using hundreds of thousands of CW series low-voltage circuit breaker spring operating mechanisms with safe operation experience, complete accessories to meet different needs, strict testing methods, and complete characteristic curve records to ensure high product quality;

According to the GB 1984 standard, it has extended electrical life E2 level, extended mechanical life M2 level, and capacitive current switching C2 level;

The circuit breaker meets the following standards:
IEC62271-100 GB 1984 "High Voltage AC Circuit Breakers"
IEC60694 GB/T 11022 Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards
JB 3855 High Voltage AC Vacuum Circuit Breaker
DL/T 403 "Technical Conditions for Ordering 12kV~40.5kV High Voltage Vacuum Circuit Breakers"
DL/T615 "Guidelines for Parameter Selection of AC High Voltage Circuit Breakers"

2. Normal usage conditions
Ambient temperature
Maximum temperature:+40 ��;
The average value measured within 24 hours shall not exceed+35 ��;
Minimum temperature: -5 ��.
ambient humidity:
The daily average relative humidity is not greater than 95%;
Monthly average relative humidity not exceeding 90%;
The daily average vapor pressure shall not exceed 2.2 × 10-3MPa;
The monthly average vapor pressure shall not exceed 1.8 × 10-3MPa.
Altitude: not exceeding 1000m;
Seismic intensity: not exceeding 8 degrees;
The surrounding air is not significantly polluted by dust, smoke, corrosive gases and/or flammable gases, vapors and salt spray;
The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.

Special usage conditions
If the working conditions used by the user differ from normal usage conditions, such as installation at an altitude exceeding 1000m, ambient air temperature exceeding the limit specified for normal usage conditions, or high temperature prone to condensation, please consult with our company.

3. Technical parameters
Technical Parameters Table of CV2-12 Indoor High Voltage Vacuum Circuit Breaker

project		unit	data
Rated voltage Ur		kV	twelve
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value)	kV	Fracture, phase to phase, ground to ground	forty-two
	Lightning impulse withstand voltage Up (peak)	kV	Fracture, phase to phase, ground to ground	seventy-five
Rated frequency fr		Hz	fifty
Rated current Ir		A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated short-circuit breaking current Isc (effective value)		kA	25, 31.5, 40, 50
Rated peak withstand current Ip		kA	63, 80, 100, 125
Rated short-circuit closing current		kA	63, 80, 100, 125
Rated short-time withstand current Ik (effective value)		kA	25, 31.5, 40, 50
Rated short-circuit duration tk		s	four
Rated back-to-back capacitor bank breaking current Ibb (effective value)		A	four hundred
Rated back-to-back capacitor bank closing inrush current Ibi (peak)		kA	20 (frequency 4250Hz)
Rated cable charging breaking current Ic (effective value)		A	twenty-five
Rated operating sequence		Automatic reclosing: O-0.3s-CO-180-CO
		Non automatic reclosing: O-180s-CO-180-CO
Rated power supply voltage Uop for closing and opening devices		V	AC��110, 220�� DC��110, 220
Rated power supply voltage Ua of auxiliary circuit		V	AC��110, 220�� DC��110, 220
Mechanical lifespan*	210mm phase to phase distance circuit breaker	time	twenty thousand
	Circuit breakers with phase spacing of 150mm and 275mm		ten thousand
Classification: Mechanical life/Electrical life/Capacitive current breaking		M2/E2/C2

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:49:07

1. Overview
CV1-40.5 (ZN85A) indoor high-voltage vacuum circuit breaker is suitable for AC 50Hz, rated voltage 40.5kV, rated current 630A~1600A, and is used for protection and control of power lines and power equipment in industrial and mining enterprises.

Suitable for KYN61A switchgear and can also be installed on KYN61 switchgear;
Rated power frequency withstand voltage of 95kV/1min, rated lightning impulse withstand voltage of 185kV;
Rated short-circuit breaking current 25kA~31.5kA, rated short-time withstand current 25kA~31.5kA/4s;
Adopting domestic first-class manufacturers' vacuum arc extinguishing chambers, with low maintenance and high reliability, suitable for frequent operation or multiple short-circuit current breaking;
Adopting mature and reliable spring operating mechanisms, strict testing methods, and complete characteristic curve records to ensure high product quality;
According to the GB 1984 standard, it has extended electrical life E2 level, extended mechanical life M2 level, and capacitive current switching C2 level;

The circuit breaker meets the following standards:
IEC60694 GB/T 11022 Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards
IEC62271-100 GB 1984 "High Voltage AC Circuit Breakers"
JB 3855 High Voltage AC Vacuum Circuit Breaker
DL/T 403 "Technical Conditions for Ordering 12kV~40.5kV High Voltage Vacuum Circuit Breakers"
DL/T 615 "Guidelines for Selection of Parameters for AC High Voltage Circuit Breakers"

2. Normal usage conditions

Ambient temperature
The highest temperature is+40 ��, and the average temperature measured continuously for 24 hours does not exceed+35 ��. The lowest temperature is -5 ��.

The altitude shall not exceed 1000m.
The surrounding air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapors, and salt spray.

ambient humidity:
The daily average relative humidity does not exceed 95%;
The daily average vapor pressure shall not exceed 2.2 × 10-3 MPa;
The monthly average relative humidity does not exceed 90%;
The monthly average vapor pressure shall not exceed 1.8 × 10-3MPa.

Vibration or ground motion from outside the switchgear and control equipment can be ignored.

The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.

Special usage conditions
If the working conditions used by the user differ from normal usage conditions, such as installation in places with an altitude exceeding 1000m, ambient air temperature exceeding the limit specified by normal applicable conditions, or high temperature prone to condensation, please consult with our company and reach a consensus.

Technical parameters of CV1-40.5 (ZN85A) indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:48:59

1. Overview

CV1-24 indoor high-voltage vacuum circuit breaker is suitable for AC 50Hz, rated voltage 24kV, rated current 630A~3150A, as protection and control for power lines and power equipment in industrial and mining enterprises. There are fixed and handcart types, and the handcart type is suitable for armored central cabinets such as KYN28A-24. Strict cabinet matching tests ensure interchangeability; Rated power frequency withstand voltage of 65kV/1min, with a break distance of 79 kV/1min; Rated lightning impulse withstand voltage of 125kV, with a break distance of 145kV; rated short-circuit breaking current of 25kA~31.5kA, rated short-time withstand current of 25kA~31.5kA/s;
Adopting domestic first-class manufacturers' vacuum arc extinguishing chambers, with low maintenance and high reliability, suitable for frequent operation or multiple short-circuit current breaking;
Adopting mature and reliable spring operating mechanisms, strict testing methods, and complete characteristic curve records to ensure high product quality;
According to GB1984 standard, it has extended electrical life E2 level, extended mechanical life M2 level, and capacitive current switching C2 level;

The circuit breaker meets the following standards:
IEC60694 GB/T 11022 "Common Technical Conditions for High Voltage Switchgear and Control Equipment"
IEC62271-100 GB 1984 "High Voltage AC Circuit Breakers"
JB 3855 High Voltage AC Vacuum Circuit Breaker
DL/T 403 "Technical Conditions for Ordering 12kV~40.5kV High Voltage Vacuum Circuit Breakers"
DL/T615 "Guidelines for Parameter Selection of AC High Voltage Circuit Breakers"
Q/GDW "Technical Specification for 20kV Circuit Breakers"

2. Normal usage conditions
Environmental temperature: maximum temperature+40 ��, average value measured within 24 hours not exceeding+35 ��, minimum temperature -5 ��;
Altitude not exceeding 1000m;
The surrounding air is not significantly polluted by dust, smoke, corrosive gases and/or flammable gases, vapors and salt spray;
Environmental humidity: The daily average relative humidity is not greater than 95%, the daily average vapor pressure is not greater than 2.2 × 10-3MPa, the monthly average relative humidity is not greater than 90%, and the monthly average vapor pressure is not greater than 1.8 × 10-3MPa;
Vibration or ground motion from outside the switchgear and control equipment can be ignored;
The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.

3. Technical parameters
Technical parameters of CV1-24 indoor high-voltage vacuum circuit breaker

project		unit	data
Rated voltage Ur		kV	twelve
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value)	kV	Fracture, phase to phase, ground to ground	forty-two
	Lightning impulse withstand voltage Up (peak)	kV	Fracture, phase to phase, ground to ground	seventy-five
Rated frequency fr		Hz	fifty
Rated current Ir		A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated short-circuit breaking current Isc (effective value)		kA	25, 31.5, 40, 50
Rated peak withstand current Ip		kA	63, 80, 100, 125
Rated short-circuit closing current		kA	63, 80, 100, 125
Rated short-time withstand current Ik (effective value)		kA	25, 31.5, 40, 50
Rated short-circuit duration tk		s	four
Rated back-to-back capacitor bank breaking current Ibb (effective value)		A	four hundred
Rated back-to-back capacitor bank closing inrush current Ibi (peak)		kA	20 (frequency 4250Hz)
Rated cable charging breaking current Ic (effective value)		A	twenty-five
Rated operating sequence		Automatic reclosing: O-0.3s-CO-180-CO
		Non automatic reclosing: O-180s-CO-180-CO
Rated power supply voltage Uop for closing and opening devices		V	AC��110, 220�� DC��110, 220
Rated power supply voltage Ua of auxiliary circuit		V	AC��110, 220�� DC��110, 220
Mechanical lifespan*	210mm phase to phase distance circuit breaker	time	twenty thousand
	Circuit breakers with phase spacing of 150mm and 275mm		ten thousand
Classification: Mechanical life/Electrical life/Capacitive current breaking		M2/E2/C2

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:48:50

The CV1-12 (VS1) indoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a new generation of vacuum circuit breakers developed and researched using advanced CAD/CAM/CAE design and manufacturing technology. This circuit breaker is used for control and protection in AC 50Hz, rated voltage 12kV and below power grids, and is widely used in industrial and mining enterprises, substations and other places.

project		unit	data
Rated voltage Ur		kV	twelve
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value)	kV	Fracture, phase to phase, ground to ground	forty-two
	Lightning impulse withstand voltage Up (peak)	kV	Fracture, phase to phase, ground to ground	seventy-five
Rated frequency fr		Hz	fifty
Rated current Ir		A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated short-circuit breaking current Isc (effective value)		kA	25, 31.5, 40, 50
Rated peak withstand current Ip		kA	63, 80, 100, 125
Rated short-circuit closing current		kA	63, 80, 100, 125
Rated short-time withstand current Ik (effective value)		kA	25, 31.5, 40, 50
Rated short-circuit duration tk		s	four
Rated back-to-back capacitor bank breaking current Ibb (effective value)		A	four hundred
Rated back-to-back capacitor bank closing inrush current Ibi (peak)		kA	20 (frequency 4250Hz)
Rated cable charging breaking current Ic (effective value)		A	twenty-five
Rated operating sequence		Automatic reclosing: O-0.3s-CO-180-CO
		Non automatic reclosing: O-180s-CO-180-CO
Rated power supply voltage Uop for closing and opening devices		V	AC��110, 220�� DC��110, 220
Rated power supply voltage Ua of auxiliary circuit		V	AC��110, 220�� DC��110, 220
Mechanical lifespan*	210mm phase to phase distance circuit breaker	time	twenty thousand
	Circuit breakers with phase spacing of 150mm and 275mm		ten thousand
Classification: Mechanical life/Electrical life/Capacitive current breaking		M2/E2/C2

CV1-12 (VS1) Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VS1 Indoor High Voltage Vacuum Circuit Breaker (VS1 Side Mounted)

2026-6-10 19:48:41

Application Fields of VDm Indoor High Voltage Vacuum Circuit Breaker
VDm type indoor high-voltage vacuum circuit breakers equipped with permanent magnet operating mechanisms can be widely used in power plants, substations, as well as various monitoring and usage links. For example, power supply for chemical plants, steel mills, automated chemical plants, airports, and large buildings.
VDm type vacuum circuit breaker is a modern vacuum circuit breaker
VDm vacuum circuit breaker is the first circuit breaker in China to realize the concept of maintenance free. The application of epoxy casting sealing technology in its high lifespan vacuum arc extinguishing chamber ensures maintenance free operation of the arc extinguishing system; The high reliability permanent magnet actuator used ensures maintenance free operation of the actuator; The electronic control part abandons the traditional auxiliary switch and replaces it with a photoelectric proximity switch, and adopts a fully electronic power supply and intelligent control unit to ensure maintenance free operation of the electronic control part.

Components and characteristics of VDm type vacuum circuit breaker
MS1 permanent magnet actuator
The core part of a vacuum circuit breaker completes the opening and closing process of the contacts and maintains the opening and closing position.
Electronic control unit
Control the opening and closing, energy storage and release of vacuum circuit breakers, and achieve various flexible locking functions.
capacitor bank
A highly reliable energy storage system.
Position detector
Used to detect the on/off position of the switch.
spindle
The only pure mechanical unit used to connect the permanent magnet actuator and the vacuum arc extinguishing chamber.

Maintenance free solution for VDm indoor high-voltage vacuum circuit breaker using bistable permanent magnet technology
The VDm vacuum circuit breaker adopts MS1 type permanent magnet operating mechanism. The institution utilizes a bistable magnetic circuit system, using two excitation coils to drive the moving iron core to the corresponding limit position, and utilizing the magnetic field energy provided by high-performance permanent magnets to keep it at the limit position. Stimulating one of the excitation coils to generate a driving force greater than the remaining holding force can activate the moving iron core of the permanent magnet mechanism.
When the control system malfunctions, a manual opening device can be used to urgently disconnect the circuit breaker.
The MS1 permanent magnet actuator eliminates the complex and vulnerable mechanical devices such as energy storage and locking of traditional mechanisms, simplifies the structure, and reduces the number of parts by more than 70% compared to traditional mechanisms, greatly improving the reliability and lifespan of the mechanism. At the same time, due to the use of capacitors as the operating power supply, it also avoids the dependence of traditional mechanisms on high-capacity dedicated power supplies and the impact of auxiliary power supply fluctuations on the operational characteristics of the mechanism.
The MS1 type permanent magnet actuator with excellent performance can operate frequently for a long time and truly achieve permanent maintenance free operation.

[Indoor vacuum circuit breaker]ZN56-12 High voltage vacuum circuit breaker

2026-6-10 19:48:33

ZN56-12 (V2000) indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor device with a rated voltage of 12KV. It is used for control and protection in industrial and mining enterprises, power plants, and substations in 10KV power systems, especially in places with frequent operation.

Introduction to the Structure of ZN56-12 High Voltage Vacuum Circuit Breaker
This circuit breaker is equipped with a ceramic vacuum arc extinguishing chamber, using copper chromium contact material and cup-shaped longitudinal magnetic field contact structure. The electrical wear rate of its contacts is low, the electrical life is long, the voltage resistance level of the contacts is high, the dielectric insulation strength is stable, the arc recovery is rapid, the current cutoff level is low, and the breaking ability is strong.

The overall structure of the circuit breaker adopts the form of operating mechanism and arc extinguishing chamber arranged in front and behind, and the main electrical circuit part is a three-phase floor standing structure. The operating mechanism is a flat spring energy storage mechanism with manual and electric energy storage functions. The operating mechanism is placed in the chassis in front of the arc extinguishing chamber, which is divided into five assembly spaces by four middle partitions. The energy storage part, transmission part, trip part, and buffer part of the operating mechanism are respectively installed in between.

[Indoor vacuum circuit breaker]ZN33B-12 Suspended High Voltage Vacuum Circuit Breaker

2026-6-10 19:48:23

ZN33B-12 suspension type high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a highly reliable and maintenance free product of new design, which absorbs the technical essence of VD4, VK and VS1 products at home and abroad on the basis of the original ZN33B-12 product. Circuit breakers are suitable for indoor high-voltage distribution equipment with three-phase AC 50HZ and rated voltage of 12kV and below. As a protection and control unit for power grid equipment and industrial and mining enterprise power equipment, the circuit breaker has excellent performance due to the patented CDY type permanent magnet mechanism attached to it. It is particularly suitable for places with frequent operation or multiple short-circuit current interruptions.

Technical parameters of ZN33B-12 suspended high-voltage vacuum circuit breaker

serial number S��N	project Item	unit Unit	numerical value Digital Value
one	rated voltage Rated Voltage	kV	twelve
two	Rated short-time power frequency withstand voltage (1min) Rated Short Period Work Frequency Voltage Endurance (1 min)		forty-two
three	Rated lightning impulse withstand voltage (peak) Rated Thunder and Lightening Striking Endurance Voltage (Peak Value)		seventy-five
four	rated frequency Rated Frequency	HZ	fifty
five	rated current Rated Current	A	630 1250	630 1250
six	Rated short-circuit breaking current Rated Short-circuit On and Off Current	KA	twenty	thirty-one point five
seven	Rated short-time withstand current Rated Short Period Endurance Current	KA	twenty	thirty-one point five
eight	Rated short-circuit duration Rated Short-circuit Continuing Time	S	four
nine	Rated peak withstand current Rated Peak Value Endurance Current	kA	fifty	eighty
ten	Rated short-circuit closing current Rated Short-circuit On-switch Current	kA	fifty	eighty
eleven	Secondary circuit power frequency withstand voltage (1min) Secondary Loop Work Frequency Voltage Endurance (1 minute)	V	two thousand
twelve	Rated Single/Back to Back Capacitor Group On and Off Current	A	630/400
thirteen	Rated capacitor bank closing inrush current Rated Capacitor Group Enclosed Surge	KA	12.5 (Frequency not larger than 1000Hz)
fourteen	mechanical life Mechanical Lifespan	time Times	twenty thousand
fifteen	Rated current breaking times Rated Current On and Off Times		twenty thousand
sixteen	Rated short-circuit current breaking times Rated Short-circuit Current On and Off Times		fifty
seventeen	Allowable cumulative thickness of wear for dynamic and static contacts Allowed Worm Accumulated Thickness of Dynamite and Static Contact Head	mm	three
eighteen	Rated operating sequence Rated Operating Sequence		OFF minute -0.3S-ON/OFF combined minute -180S-ON/OFF

[Indoor vacuum circuit breaker]ZN27-12 High voltage vacuum circuit breaker

2026-6-10 19:48:14

The ZN27-12 high-voltage vacuum circuit breaker is a three pole indoor high-voltage vacuum circuit breaker that uses electromagnetic or spring operation. It is suitable for indoor distribution systems with three-phase AC 50Hz and rated voltage of 12kV. It can be used for protection and control in industrial and mining enterprises, power plants, substations, etc. It is especially suitable for frequent operation places such as capacitor banks, medium voltage motors, and arc furnace transformers.

Meaning of ZN27-12 High Voltage Vacuum Circuit Breaker Model

Main features of ZN27-12 high-voltage vacuum circuit breaker
Non combustible, non explosive, non polluting to the environment, with a lifespan of 10000 cycles;
Has a good sliding guide device, stable mechanical characteristics, and no bouncing when closing;
Insulation level under all working conditions, safe to use;
Can be equipped with electromagnetic or spring mechanisms, with both integral and split types, to meet the usage requirements of different cabinet types;
The vacuum arc extinguishing chamber adopts a longitudinal magnetic field contact structure, which has good resistance to welding, low contact resistance, high withstand voltage after arc, and reliable use

[Indoor vacuum circuit breaker]ZN22-40.5 Indoor high-voltage vacuum circuit breaker

2026-6-10 19:48:05

serial number	parameter name	unit	Data
			20kA	25kA	31.5kA
one	rated voltage	kV	forty point five
two	rated current	A	630, 1250, 1600	630, 1250, 1600	1250, 1600, 2000, 2500
three	Rated short-circuit breaking current	kA	twenty	twenty-five	thirty-one point five
four	Rated short-time withstand current	kA	fifty	sixty-three	eighty
five	Rated short-circuit duration	s	four

six	Rated peak withstand current	kA	fifty	sixty-three	eighty

seven	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty

eight	Rated short-circuit breaking current breaking times	time	twelve	sixteen	twenty

nine	Rated operating sequence		Min-0.3s HeFen-180s HeFen
ten	Rated breaking current of capacitor bank	A	six hundred and thirty

eleven	Rated back-to-back capacitor bank breaking current	A	four hundred

twelve	Rated lightning impulse withstand voltage (full wave)	kV	one hundred and eighty-five

thirteen	Rated short-time power frequency withstand voltage (1min)	kV	ninety-five

fourteen	closing time	ms	��85

fifteen	Opening time	ms	��60

sixteen	mechanical life	time	ten thousand

seventeen	Rated power of energy storage motor	W	three hundred and fifty

eighteen	Rated voltage of energy storage motor	V	AC/DC110��AC/DC220

nineteen	Energy storage time	s	��15

twenty	Rated voltage of closing electromagnet	V	AC/DC110��AC/DC220

twenty-one	Rated voltage of the opening electromagnet	V	AC/DC110��AC/DC220

twenty-two	Rated voltage of energy storage type shunt release	V	AC/DC110��AC/DC220
twenty-three	Rated voltage of voltage loss release device	V	AC/DC110��AC/DC220

twenty-four	Rated current of overcurrent release device	A	3.5 5

twenty-five	Rated current of auxiliary switch	A	AC10 DC5

twenty-six	Weight	kg	one hundred and seventy

ZN22-40.5 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN72-40.5 Indoor high-voltage vacuum circuit breaker

2026-6-10 19:47:57

The ZN72-40.5 vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 40.5kV and three-phase AC 50Hz. This circuit breaker mechanism is integrated with the switch; The dedicated operating mechanism is a spring energy storage type, which can be operated using AC/DC energy storage or manually operated.

ZN72-40.5 indoor high-voltage vacuum circuit breaker has a simple structure, strong breaking capacity, long service life, complete operating functions, no explosion hazard, and easy maintenance. It is suitable for use as a control or protection switch in power plants, substations and other transmission and distribution systems, especially for breaking important loads and places with frequent operations.

serial number	name	unit	Technical Specifications
one	rated voltage	kV	forty point five
two	rated current	A	1250, 1600, 2000
three	Rated short-circuit breaking current	kA	25 31.5
four	Rated short-circuit closing current (peak)	kA	63 80
five	Rated operating sequence		O-0.3s-CO-180s-CO
six	Dynamic stability current (peak value)	kA	63 80
seven	4 S thermal stability current	kA	25 31.5
eight	Rated short-circuit current breaking times	time	twenty
nine	Rated lightning impulse withstand voltage (full wave)	kV	one hundred and eighty-five
ten	Rated short-time power frequency withstand voltage (1min)	kV	ninety-five
eleven	Rated current breaking times	time	6000 10000
twelve	mechanical life	time	6000 10000
thirteen	closing time	S	�� 0.09
fourteen	Opening time	S	�� 0.07
fifteen	Energy storage motor power	W	three hundred and fifty
sixteen	Rated voltage of energy storage motor	V	�� 110, �� 220
seventeen	Energy storage time	S	�� 15
eighteen	Rated voltage of closing electromagnet	V	-110 -220
nineteen	Rated voltage of the opening electromagnet	V	-110 -220
twenty	Rated current of overcurrent release device	A	five
twenty-one	Rated current of auxiliary switch	A	AC �� 10 DC �� 5

Note: The opening and closing times are the operating times at the highest, lowest, and rated operating voltages.

ZN72-40.5 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN70-12 Indoor high-voltage vacuum circuit breaker

2026-6-10 19:47:48

The technical performance of ZN70 (DZN) -12 indoor high-voltage vacuum circuit breaker products has reached the international leading level and complies with standards such as GB1984, DL/T402-1999, IEC60056, etc. The ZN70-12 product can be used as an indoor transformer and distribution device with a rated voltage of 12kV and three-phase AC 50Hz, especially suitable for breaking important loads, frequent operation, and maintenance free places.

[Indoor vacuum circuit breaker]ZN82-12 Vacuum Circuit Breaker

2026-6-10 19:47:39

The ZN82-12 vacuum circuit breaker adopts the world's advanced miniaturization and high-performance arc extinguishing chamber manufacturing technology. The contact is made of low current level copper chromium alloy, with small current flow (below 3.5A) and operating overvoltage less than 2.0 times. The shape of the contact part is deliberately processed, with a longitudinal rotating magnetic field for arc extinguishing below 31.5kA and a transverse rotating magnetic field for arc extinguishing above 40kA, which can prevent local overheating of the contact surface, reduce contact wear, extend contact life, and have a rated short-circuit current breaking frequency of not less than 100 times.

The ZN82-12 vacuum circuit breaker is equipped with an electric motor spring type operating mechanism, which can be used as both AC and DC power sources. It has a small operating current and a spring energy storage time of less than 5 seconds, making it suitable for frequent operating situations.

The configuration of the operating mechanism and the main switch body is reasonable, the mechanical performance is stable and reliable, the bounce is less than 2ms, and the mechanical life is up to 30000 times.

The circuit breaker has complete auxiliary functions: it comes with anti bounce function and low-voltage capacitor release, with up to three auxiliary switches and multiple reserved contacts for backup. There are 64 pairs of secondary contact points, and there is a reliable mechanical interlock with the handcart position. At the same time, the control power supply can be AC or DC, with strong adaptability.

The 40kA vacuum circuit breaker still has a fast reclosing function (O-0.3S-CO-180S-CO) due to its advanced arc extinguishing chamber design and excellent manufacturing.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:47:30

ZN80-12 indoor high-voltage vacuum circuit breaker is a three-phase AC 50HZ, rated voltage 12KV indoor high-voltage switchgear. This circuit breaker is a spring energy storage type, which can be operated by AC or DC or manually. It is a new type of circuit breaker that combines Siemens technology from Germany and Westinghouse technology from the United States. Suitable for control or protection switches in power plants, substations, and transmission and distribution systems, especially for breaking important loads and frequent operations in places.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:47:22

ZN76-40.5 (VY) indoor high-voltage AC vacuum circuit breaker is a three-phase AC 50HZ, rated voltage 40.5KV, rated current 1250A or 2000A indoor device, equipped with a dedicated spring operating mechanism, used for protection and control in industrial and mining enterprises, power plants and distribution stations, and suitable for frequent operation places.

[Indoor vacuum circuit breaker]ZN75-12 High voltage vacuum circuit breaker

2026-6-10 19:47:13

ZN75-12 (VK) indoor high-voltage vacuum circuit breaker is an indoor device with three-phase AC 50HZ, rated voltage of 12KV, and rated current of 630-4000A. It is equipped with a dedicated spring operated mechanism and is used for protection and control in industrial and mining enterprises, power plants, and distribution stations. It is also suitable for frequent operation sites. It can be used in areas with an altitude of up to 3000 meters and can be used in tropical, cold, and desert regions.

[Indoor vacuum circuit breaker]ZN18-12 High voltage vacuum circuit breaker

2026-6-10 19:47:04

Overview
The ZN18-12 (CK) vacuum circuit breaker is a derivative product developed based on the ZN18-12 (VK-10) vacuum circuit breaker to meet market competition demands and meet user requirements. Its main purpose is to enable the installation of the ZN18-12 (VK) vacuum circuit breaker on switchgear models such as ZS1 (ABB) and GZS1 (Senyuan), providing users with an additional choice of vacuum circuit breaker.

II. Environmental conditions for use
1. Surrounding air temperature:+40 ��~-15 ��, and the average value measured within 24 hours does not exceed 35 ��; Daily temperature difference less than 15k;
2. The altitude shall not exceed 1000m;
3. The surrounding air is not significantly polluted by dust, smoke, corrosive or combustible gases, steam or salt spray;
4. Relative temperature of indoor environment: daily average not exceeding 95%, monthly average not exceeding 90%;
5. The seismic intensity shall not exceed 8 degrees;
6. Indoor use;
7. Any requirements beyond the above environmental conditions shall be agreed upon by the user and the manufacturer.

Scope of use of ZN18-12 high-voltage vacuum circuit breaker
• Rated voltage 12kV;
Rated current 630A, 1250A, 3150A;
Rated short-circuit breaking current 25kA, 31.5kA, 40kA;
It can be used as a control and protection switch for substations, especially suitable for breaking important loads and frequent operations, such as substations and capacitor banks that require small footprint, oil-free safety and high reliability.

[Indoor vacuum circuit breaker]V2000-12 series indoor AC high-voltage vacuum circuit breaker

2026-6-10 19:46:55

The V2000-12 series indoor AC high-voltage vacuum circuit breaker is suitable for networks with 50Hz and rated voltage of 12kV. It is the second generation product of the VS1 series. The vacuum arc extinguishing chamber can achieve self-renewal, extending the working life. In the vacuum arc extinguishing chamber, the contact speed, quality, and stroke are small, and low spring force is sufficient to operate the circuit breaker. Therefore, the operating mechanism of the circuit breaker has minimal wear and almost no corresponding maintenance and upkeep. Its supporting products include mid mounted switchgear, fixed switchgear, etc., which can be used as control and protection equipment in industrial and mining enterprises, power plants, substations, and other places. It is especially suitable for industries that require frequent operation such as metallurgy and arc steelmaking.

The operating mechanism of the V2000-12 series indoor AC high-voltage vacuum circuit breaker is a spring energy storage type, which can be operated electrically or manually.

[Indoor vacuum circuit breaker]HSV1 series intelligent low-voltage vacuum circuit breaker

2026-6-10 19:46:46

The HSV1 series intelligent low-voltage vacuum circuit breaker is mainly suitable for distribution networks with AC 50Hz, rated working voltages of 400V and 690V, and rated working currents of 630A to 3200A. It is used to distribute electrical energy, protect lines, and prevent power equipment from being damaged by overload, undervoltage, short circuit, and single-phase grounding faults. Under normal conditions, it can also be used for infrequent switching of lines. The core components of the circuit breaker adopt intelligent controllers with precise selective protection, which can avoid the need for products to comply with GB 14048.2 and IEC 60947-2 standards.

[Indoor vacuum circuit breaker]3AV5 Type Sealed Pole Vacuum Circuit Breaker

2026-6-10 19:46:38

The primary part of the 3AV5 fixed sealed pole vacuum circuit breaker adopts fixed sealing technology, which assembles the upper and lower output sockets, conductive clamps, flexible connections, and insulation rods together, so that the surface of the arc extinguishing chamber is not affected by the external environment.

The 3AV5 fixed sealed pole vacuum circuit breaker has a small number of parts, simple operation, high reliability, long service life, and truly achieves complete maintenance. The phase spacing is small (150mm), the overall size is small, and a 650mm wide central cabinet can be used.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:46:29

The VGP (alternative to ZN96-12) indoor high-voltage vacuum circuit breaker is widely used in indoor armored air insulated switchgear. It complies with standards such as GB1984-2003, DL/T403-2000, German DINVDE0670, IEC62271-100:2001, and IEC60694. Under normal operating conditions, as long as it is within the technical parameters of the circuit breaker, it can ensure safe and reliable operation in the corresponding voltage level of the power grid.

The three-phase pole part of the VGP (which can replace ZN96-12) indoor high-voltage vacuum circuit breaker is composed of the vacuum interrupter and the upper and lower outlet terminals directly sealed in the epoxy resin through the automatic pressure gel process (APG). The arc extinguishing chamber is made by Siemens or made in Germany, which reduces the pollution of the circuit breaker adjustment link and the external environment on the arc extinguishing chamber shell and improves the reliability.

VGP vacuum circuit breakers have special advantages in situations where frequent operation or long breaking life is required. This vacuum circuit breaker has a reclosing function, extremely high operational reliability and service life, and the pole part is maintenance free.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:46:21

main purpose
The VGP-24 indoor high-voltage vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 24KV and three-phase AC 50HZ. It is suitable for control or protection switches in power plants, substations, industrial and mining enterprises and other transmission and distribution systems, especially for breaking important loads and frequent operations.
The manufacturing of circuit breakers complies with China's national standards GB1984-2003 "AC High Voltage Circuit Breakers", JB3855-1966 "Technical Conditions for Ordering 3.6-40.5KV Indoor Vacuum Circuit Breakers" and relevant IEC standards, and has reliable interlocking function.
The operating mechanism of the circuit breaker is a spring energy storage type, which can be operated by AC or DC energy storage or manually operated.
The circuit breaker can also be equipped with a long-life permanent magnet operating mechanism, with a mechanical lifespan of up to 100000 times, and can be used in extremely frequent operating situations.
The circuit breaker is designed in a front and rear split structure, which can be used as a fixed installation unit or as a mid mounted unit for use with chassis vehicles.

Normal working environment
1. Altitude: �� 2000m,>2000m requires special customization
2. Environmental humidity: maximum+40 ��, minimum -25 ��
3. Relative temperature: The daily average is not greater than 95%, and the monthly average is not greater than 90%.
4. Earthquake intensity: below level 8
5. Places without fire, explosion, corrosive gases, and severe vibrations.

Main technical parameters of VGP-24KV indoor high-voltage vacuum circuit breaker

project	unit	parameter
rated voltage	KV	twenty-four
rated frequency	HZ	fifty
rated current	A	630 1250 1600
Rated short-circuit breaking current	KA	20 25 31.5
Rated short-circuit closing current (peak)	KA	50 63 80
Rated short-circuit duration	S	four
Rated short-circuit breaking current breaking times	time	twenty
Rated operating sequence		0-0.3s-CO-180s-CO
Rated lightning impulse withstand voltage (peak)	KV	one hundred and twenty-five
1-minute power frequency withstand voltage	KV	sixty-five
closing time	ms	��100
Opening time	ms	��50
mechanical life	time	twenty thousand
Rated energy storage and operating voltage	V	��220/110
Cut off time	ms	��65
Energy storage time	s	��10

Mechanical characteristic adjustment parameters of VGP-24KV indoor high-voltage vacuum circuit breaker

project	unit	parameter
Contact opening distance	mm	15±1
Contact overtravel	mm	3.5±0.5
Opening speed	m/s	0.9-1.2
closing speed	m/s	0.5-0.8
Contact closing bounce time	ms	��2
Rated contact pressure	N	20KA(2000��200) 25KA(2400±200) 31.4KA(3100±200)
Three phase asynchronous opening and closing	ms	��2

Appearance and installation dimensions

VGP-24KV Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN73A-12/D Indoor High Voltage Permanent Magnet Vacuum Circuit Breaker

2026-6-10 19:46:12

ZN73A-12/D indoor high-voltage permanent magnet vacuum circuit breaker is an advanced product in China. This product adopts the self-developed YG type permanent magnet operating mechanism, which has manual and electric opening and closing functions. It eliminates the complex and vulnerable energy storage and locking devices in traditional spring mechanisms, greatly simplifying the transmission process, especially the manual opening device, which is used for emergency load opening operation in case of secondary operation circuit failure. This truly achieves high reliability, long service life, maintenance free, and simple maintenance. Under normal circumstances, the service life is up to 100000 times.

ZN73A-12/D indoor high-voltage permanent magnet vacuum circuit breaker model meaning

Main technical parameters of ZN73A-12/D indoor high-voltage permanent magnet vacuum circuit breaker

project	unit	parameter
rated voltage	KV	twelve
Rated short-time power frequency withstand voltage (1min)	KV	forty-two
Rated lightning impulse high voltage (peak)	KV	seventy-five
rated frequency	HZ	fifty
rated current	A	630-1250 1250-3150 1250-4000
Rated short-circuit breaking current	kA	20 25 31.5 40
Rated thermal stability current (effective value)	kA	20 25 31.5 40
Rated peak withstand current	kA	50 63 80 100
Rated short-circuit closing current	kA	50 63 80 100
Rated short-circuit duration	S	four
Secondary circuit power frequency withstand voltage (1min)	V	two thousand
Rated operating sequence		Off/off -0.3s - on/off -180s - on/off/off/on/off
Rated breaking current of single/back-to-back capacitor bank	A	six million three hundred and eight thousand and four hundred
Opening time (rated voltage)	ms	��50
Closing time (rated voltage)	ms	��75
mechanical life	time	��100000
Rated short-circuit current breaking times	mm	thirty
Allowable cumulative thickness of wear for dynamic and static contacts	mm	three
Contact opening distance	mm	11±1*
overstroke	mm	3.5±0.5
Contact closing bounce time	ms	��2(40KA��3)
Three phase asynchronous opening and closing	ms	��2
Average opening speed	m/s	0.8-1.2
Average closing speed	m/s	0.5-0.8
Interphase center distance	mm	210 275
Main electrical circuit resistance	u��	��45(Less than 1250A)��40(1600-2000A)��30(more than 2500A)
Contact closing contact pressure	N	2000±200(20kA) 2400±200(25KA) 3100±200(31.5KA) 4300±200(40KA)

There are special requirements for the operation power supply (such as DC110V, AC/DC operation), and the technical parameters of the permanent magnet mechanism need to be adjusted.
The contact distance of Westinghouse arc extinguishing chamber is 9 ± 1mm
The contact opening distance of Siemens arc extinguishing chamber is 8 ± 1mm

Appearance and installation dimensions of ZN73A-12/D indoor high-voltage permanent magnet vacuum circuit breaker

ZN73A-12/D indoor high-voltage permanent magnet vacuum circuit breaker

[Indoor vacuum circuit breaker]ZK2-500 type vacuum circuit breaker

2026-6-10 19:46:02

Outline dimensions and installation dimensions of ZK2-500 vacuum circuit breaker

ZK2-500 vacuum circuit breaker is suitable for industrial and mining enterprises, power plants, substations, and frequent operations with AC 50HZ, rated voltage up to 1140KV, and rated current up to 500A. Mainly used for the protection and control of electrical equipment.
The contact belongs to the vacuum medium, therefore, it has small volume, high pressure resistance, high breaking capacity, long service life, and does not require maintenance. Especially due to its advantages of not exposing the arc and being safe and reliable, it is widely used in industrial sectors such as coal, power, chemical, metallurgy, and petroleum.

Technical parameters of ZK2-500 vacuum circuit breaker

Rated working voltage 1140V
Rated working current 500A
Rated short-circuit breaking current 9KA
Rated short-circuit breaking frequency 16 times
Rated current breaking frequency 3000 times
Mechanical lifespan of 15000 cycles
Rated short-time withstand current 9KA
Rated short-time withstand time 4S
Rated power frequency withstand voltage 10KV
Rated opening torque 4 ± 0.4mm
Contact self closing force 100 ± 10N
Contact reaction force at rated opening moment 140 ± 14N
Contact resistance under rated contact pressure �� 100 ��

[Indoor vacuum circuit breaker]ZK3M-1.14/400 Permanent magnet vacuum circuit breaker

2026-6-10 19:45:53

ZK3M-1.4/400 permanent magnet vacuum circuit breaker

[Indoor vacuum circuit breaker]ZK2M-1.14/500 Permanent magnet vacuum circuit breaker

2026-6-10 19:45:45

ZK2M-11.4/500 permanent magnet vacuum circuit breaker

[Indoor vacuum circuit breaker]ZK1M-1.14/630 Permanent magnet vacuum circuit breaker

2026-6-10 19:45:36

ZK1M-11.4/630 permanent magnet vacuum circuit breaker

[Indoor vacuum circuit breaker]DZ-400/1140 AC Low Voltage Vacuum Circuit Breaker

2026-6-10 19:45:27

model	rated voltage	rated current	Ultimate on-off capability	Electrical lifespan	mechanical life	Inherent opening time	closing time
DZ1-400/1140	1140V	400A	8kA	3000 times	20000 times	�� 30ms	�� 100ms

DZ-400/1140 AC Low Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor vacuum circuit breaker

2026-6-10 19:45:18

ZN28Z-12 series integral vacuum circuit breaker

Product features
1. Complete product range: rated current from 630A to 4000A, rated short-circuit breaking current
From 20kA to 50kA.
2. Advanced miniaturized copper chromium contact longitudinal magnetic field arc extinguishing chamber
3. Convenient and flexible structural forms and installation methods
4. Guaranteed high reliability and stability
5. Good product series and universality, easy to maintain and use for users
6. Complete product type test: rated short-circuit opening and closing current, rated dynamic stability, full capacity opening and closing
The original indicators such as the DC component value during interruption are higher than the national standards.

Technical parameters of ZN28Z-12kV indoor vacuum circuit breaker

serial number	name		unit	model
serial number	name		unit	ZN28-12/20	ZN28-12/25	ZN28-12/32	ZN28-12/40	ZN28-12/50
one	rated voltage		kV	twelve
two	rated current		A	six hundred and thirty one thousand one thousand two hundred and fifty	one thousand one thousand two hundred and fifty	one thousand one thousand two hundred and fifty two thousand	one thousand two hundred and fifty one thousand and six hundred two thousand two thousand and five hundred three thousand one hundred and fifty	four thousand
three	1-minute power frequency withstand voltage	Phase by phase ground	kV	forty-two
three	1-minute power frequency withstand voltage	fracture		forty-eight
four	Lightning impulse withstand voltage	Phase by phase ground		seventy-five
four	Lightning impulse withstand voltage	fracture		eighty-four
five	Rated short-circuit breaking current		kA	twenty	twenty-five	thirty-one point five	forty	fifty
six	Rated short-circuit breaking current breaking times		time	fifty	fifty	fifty	thirty	twenty
seven	Percentage of DC component					45%	45%	35%
eight	Rated dynamic stability current (peak value)		kA	fifty	sixty-three	one hundred	one hundred and thirty	one hundred and thirty
nine	4s thermal stability current		kA	twenty	twenty-five	thirty-one point five	forty	fifty
ten	Rated operating sequence			��	��	��	��	��
eleven	Rated out of step breaking current		kA			eight	ten	twelve point five
twelve	Rated earth fault breaking current for different phases		kA	seventeen point three	twenty-one point seven	twenty-seven point three	thirty-four point six	forty-three point three
thirteen	Rated breaking current of a single capacitor bank		A	six hundred and thirty
fourteen	Rated back-to-back capacitor bank breaking current		A	four hundred
��O-0.3s-CO-180s-CO ��O-180s-CO-180s-CO

[Indoor vacuum circuit breaker]ZN63u-15 Vacuum Circuit Breaker

2026-6-10 19:45:10

ZN63u-15 vacuum circuit breaker

Product features

1. Mechanical durability and electrical durability
2. At rated current, the allowable number of disconnections is 10000 times
3. Under rated short-circuit current, the allowable number of disconnections is 20 times
4. Easy maintenance: only a small amount of cleaning or lubrication is needed for the operating mechanism
5. Rated current from 630A-1250A
6. The rated short-circuit breaking current ranges from 20kA to 31.5kA
7. Vertical insulation cylinder
8. Capable of defending against various environmental influences
9. Good product series and universality, easy to maintain and use for users

Technical parameters of ZN63u-15 vacuum circuit breaker

serial number	name		unit	model
				ZN63u-15
one	rated voltage		kV	fifteen
two	Limi power frequency withstand voltage	Relatively speaking, time	kV	forty-two
		Isolation fracture
three	Lightning impulse withstand voltage	Relatively speaking, time	kV	ninety-five
		Isolation fracture
four	Rated short-circuit breaking current		kA	thirty-one point five
five	Rated short-circuit breaking current breaking times		time	twenty
six	Percentage of DC component			41%
seven	Rated dynamic stability current (peak value)		kA	one hundred
eight	3-second thermal stability current		kA	thirty-one point five
nine	Rated operating sequence			��O-0.3s-CO-180s-CO
ten	Rated cable charging breaking current		kA	25A 24 times
eleven	Rated earth fault breaking current for different phases		kA
twelve	Rated breaking current of a single capacitor bank		A
thirteen	Rated back-to-back capacitor bank breaking current		A

[Indoor vacuum circuit breaker]VB85-40.5/T2000-31.5 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:45:01

The VB85-40.5/T2000-31.5 indoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is suitable for use in three-phase AC 50Hz, rated voltage 40.5kV power systems, and can be used for load current, overload current, and fault current in industrial and mining industries, power plants, and substations.
The circuit breaker and operating mechanism are arranged vertically, effectively reducing the depth of the circuit breaker.
The three-phase arc extinguishing chamber and associated charged body are isolated by three independent epoxy resin insulation cylinders, forming a composite insulation structure. The circuit breaker meets the requirements of air distance and creepage distance under normal operating conditions, and effectively reduces the volume of the circuit breaker. The main electrical circuit vacuum arc extinguishing chamber and the dynamic and static conductive connections are installed inside an insulating cylinder, with a phase spacing of only 300mm. All electrical connections in the main circuit are fixed and have high reliability. The insulation cylinder is installed above the circuit breaker frame.
The spring operated mechanism specially designed for this new type of circuit breaker is installed inside the circuit breaker frame, and its structural characteristics are more suitable for the upper and lower layout of the circuit breaker, and become an integral part of the overall structure of the circuit breaker. The mechanism design is simple, and the output curve and its performance are more suitable for the characteristics and requirements of 40.5KV vacuum circuit breakers. The overall layout is reasonable, beautiful, and concise. Compact size, flexible operation, reliable electrical performance, long service life, easy maintenance, and maintenance free mechanism.
This circuit breaker is suitable for frequent operation, various occasions, and places with harsh operating conditions.

Main Technical Parameters of VB85-40.5/T2000-31.5 Indoor High Voltage Vacuum Circuit Breaker

project	unit	data
rated voltage	kV	forty point five
rated current	A	two thousand
rated frequency	Hz	fifty
Rated short-circuit breaking current	kA	thirty-one point five
Rated short-circuit closing current (peak)		eighty
4s rated short-time withstand current		thirty-one point five
Rated peak withstand current		eighty
Short time (1min) power frequency withstand voltage	kV	ninety-five
Lightning impulse withstand voltage (peak value)	kV	one hundred and eighty-five
Rated operating sequence		O-0.3S-CO-180s-CO
Rated short-circuit breaking current breaking times	time	twenty
mechanical life	time	ten thousand
Cut off time	ms	��80
Single capacitor group breaking current	A	six hundred and thirty
Back to back capacitor bank breaking current	A	four hundred
Rated operating voltage	V	-110/��110��-220/��220

[Indoor vacuum circuit breaker]VB12-40.5 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:44:52

The VB12 indoor vacuum circuit breaker is suitable for 35KV three-phase AC 50HZ power systems. The arc extinguishing chamber of this circuit breaker is made of ceramic structure and adopts longitudinal magnetic field contacts. It has a small volume, and the diffusion arc current generated during disconnection is uniformly distributed on the contacts, without local melting phenomenon. It also has low arc energy voltage (20-200V) and low current cutoff value (4-5A), and is equipped with a highly reliable operating mechanism.

This circuit breaker adopts a spring energy storage mechanism, which can be operated by AC energy storage or DC, or manually. This circuit breaker uses special contact materials, which make the arc extinguishing chamber have high breaking capacity and long service life. This circuit breaker has a simple structure, strong breaking capacity, long service life, complete operating functions without explosion hazards, and simple maintenance. It is suitable for controlling or protecting switches in power plants, substations and other distribution systems, especially for breaking heavy loads and frequent operations.

Main technical parameters of VB12-40.5 indoor high-voltage vacuum circuit breaker

Appearance and installation dimensions

[Indoor vacuum circuit breaker]ZN103A-40.5 Vacuum Circuit Breaker

2026-6-10 19:44:43

The ZN103-40.5E indoor medium voltage AC vacuum circuit breaker is a new generation vacuum circuit breaker. The main circuit adopts a solid insulation structure and utilizes advanced epoxy sealing technology to organically combine the vacuum arc extinguishing chamber, main electrical circuit, insulation support, etc. into an integrated sealed pole for the first time, successfully solving the environmental tolerance problem of vacuum circuit breakers fundamentally. The integrated solid sealed pole adopts self convection ventilation technology, cleverly solving the problem of heat dissipation difficulties caused by solid insulation structures.

Features:

The main circuit and operating mechanism of the circuit breaker are arranged in an upper and lower structure, optimizing the electric field distribution, increasing insulation reliability, and reducing the size of the circuit breaker in the depth direction, resulting in a significant reduction in the depth of the switchgear.

The conductive part of the main circuit is integrated into the epoxy resin pole, which protects the arc extinguishing chamber from environmental and mechanical damage, and eliminates phase to phase and surface flashover of the circuit breaker, greatly improving the external insulation level of the circuit breaker.

The current carrying components are reliably fixed in their corresponding positions by epoxy resin poured around them, without the need for additional fasteners, reducing the number of parts for the circuit breaker pole, lowering assembly errors, and improving the reliability of installing circuit breakers.

Due to the adoption of sealing technology, the volume of the circuit breaker has been greatly reduced, and the equipped switchgear cabinet is 1200mm wide, 2400mm high, and 2600mm deep.

The ZN103 circuit breaker is a self-supporting structure based on the base plate, which completely overcomes the influence of the sinking of the circuit breaker on the engagement of the primary contact and is convenient for handling.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:44:35

ZN48A-40.5 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:44:26

ZN42-27.5 indoor high-voltage vacuum circuit breaker is mainly used for the power supply and distribution system of indoor single-phase AC 50HZ electrified railway traction substations, switching stations, and partition pavilions, as the railway power traction power supply system for receiving and distributing electrical energy.

One Main features of ZN42-27.5 indoor high-voltage vacuum circuit breaker
1. New spring operating mechanism and ceramic vacuum arc extinguishing chamber produced using advanced foreign technology
2. Strengthen the installation of insulation type current transformers on the frame (optional)
3. Can be equipped with manual or electric propulsion mechanism
4. It can be installed separately in the indoor grid type interval or in the 27.5KV electrified railway dedicated switchgear.

II Main technical parameters of ZN42-27.5 indoor high-voltage vacuum circuit breaker
Number Name Unit Value
Rated voltage KV 27.5
2. Maximum voltage KV 31.5
3 rated insulation level lightning impulse withstand voltage between the fracture points, relative to ground KV 185 (�� 1000M)/230 (�� 4000M)
1MIN power frequency withstand voltage fracture, relative to ground 95 (�� 1000M)/120 (�� 4000M)
4 rated frequency HZ 50
5 rated current A 1250, 1600
6 rated short-circuit breaking current KA 25, 31.5
7 rated short-circuit closing current KA 63, 80
8 rated peak withstand current KA 63, 80
Rated short-time withstand current KA 25, 31.5
10 rated short-circuit duration S 4
11 rated capacitor bank breaking current A 400
12 rated operating sequence O -&SHY; 0.3S-&SHY; CO-180S-&SHY; CO
13 Accumulated wear amount of dynamic and static contacts MM 3
14 rated short-circuit breaking current breaking times 30 times
15 mechanical life cycles 10000
Contact pressure of 16 contacts N 3000 ± 300
17 Closing time MS �� 150
18 opening time MS 25 �� S �� 60
19 disconnection time MS �� 80
20 Energy Storage Motor Power W 350
21 Energy storage motor voltage: AC110V, DC110V, AC220V, DC220V
22 Energy storage time S �� 15
23 points, rated voltage of closing electromagnet V AC110V, DC110V, AC220V, DC220V
24 contact opening distance MM 26+2-1
25 contact spring compression MM (25KA): 3.5-5 (31.5 KA): 6 ± 1
Main circuit resistance of 26 �� 50 (1250A), 35 �� (1600A)
27 average closing speed M/S 0.9+0.2-0.3
28 average opening speed M/S 1.4 ± 0.2
29 contact closing bounce time MS �� 3
Note: Number 3 in the table is a factory inspection parameter for lightning impulse withstand voltage of 230KV and 1MIN power frequency withstand voltage of 120KV at altitudes of 1000-4000M

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:44:17

ZN40-12/630~1250-31.5, ZN41-12/1600~4000-40/50 vacuum circuit breakers are indoor high-voltage switchgear with a rated voltage of 12kV and three-phase AC 50Hz. The structure of this circuit breaker is a frame structure. The circuit breaker can be equipped with CD10 electromagnetic operating mechanism or CT8 spring operating mechanism. It can be used as the preferred circuit breaker for switchgear such as GG1A (F2) and XGN2-12.

The ZN40-12 and ZN41-12 indoor high-voltage vacuum circuit breakers have a simple structure, strong breaking capacity, long service life, complete operating functions, no explosion hazard, and easy maintenance. They are suitable for use as control or protection switches in power plants, substations, and other transmission and distribution systems, especially for breaking important loads and frequent operations.

serial number	name	ZN40-12			ZN41-12
one	Rated voltage (kV)	twelve
two	Rated current (A)	six hundred and thirty	one thousand two hundred and fifty	one thousand and six hundred	2000 2500 3150 4000
three	Rated breaking current (kA)	sixteen twenty	twenty thirty-one point five	thirty-one point five	40 50
four	Dynamic stability current (kA) (peak value)	forty fifty	fifty eighty	eighty	100 125
five	4-second thermal stability current (kA)	sixteen twenty	twenty thirty-one point five	thirty-one point five	40 50(3s)
six	Rated short-circuit closing current (kA) (peak value)	forty fifty	fifty eighty	eighty	100 125
seven	Rated short-circuit current breaking times (times)	thirty			thirty
eight	operating sequence	O-0.3s-CO-180s-CO			O-180s-CO-180s-CO
nine	Rated lightning impulse withstand voltage (kA)	75 (85 between fracture surfaces)
ten	1-minute power frequency withstand voltage (kV)	42 (48 between fracture surfaces)
eleven	Mechanical lifespan (times)	ten thousand
twelve	Rated current breaking times (times)	ten thousand

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:44:08

ZN57-12 indoor high-voltage vacuum circuit breaker is used in XGN15-12 (Z) box type fixed AC metal enclosed switchgear, which can replace the load switch as the incoming switch of the distribution substation and provide backup protection for the outgoing cabinet; At the same time, it can also be used as an outgoing line protection switch and a distribution transformer with a control capacity greater than 1250kVA. It can also be used as a connecting circuit breaker for dual power supply incoming lines. This product is suitable for 3.6-12kV three-phase AC single busbar and single busbar segmented distribution systems.

Structural characteristics of ZN57-12 circuit breaker:

·The circuit breaker adopts a three column structure, with three vacuum arc extinguishing chambers fixed in insulation cylinders cast with epoxy resin. The phases are solid insulated, with small external dimensions and a phase distance of 210mm (similar to SF6 load switches), making it easy to install in XGN15-12 high-voltage switchgear and share the main busbar with SF6 load switchgear;
·The operating mechanism and circuit breaker are arranged in an integrated manner, with the mechanism installed on the side and the three-phase arc extinguishing chamber arranged in the rear, middle, and front. The operating mechanism can be installed outside the switch cabinet door for easy maintenance of the operating mechanism and its auxiliary switches. Its transmission system structure is simple, with few adjustment steps, fully ensuring the mechanical characteristic parameters of the arc extinguishing chamber, and the mechanical life can reach 20000 times. Circuit breakers have high reliability and require minimal maintenance.
·Oil free and pollution-free environment.
·The vacuum arc extinguishing chamber adopts copper chromium contact material and longitudinal magnetic field contact structure, which has the advantages of strong breaking ability, high insulation strength, low current cutoff value, light burning loss, long electrical life, and maintenance free operation throughout the entire working period.

ZN57-12 indoor high-voltage vacuum circuit breaker operating environment:

The ambient air temperature is+40 ��, -15 ��;
Altitude not exceeding 1000 meters;
Environmental temperature: Daily average relative humidity not exceeding 95%, monthly average relative humidity not exceeding 90%; Water vapor pressure: daily average not exceeding 2.2kPa, monthly average not exceeding 1.8kPa;
A place without fire, explosion, severe pollution, chemical corrosion, and severe vibration.

[Indoor vacuum circuit breaker]VSC1(SS1)-12 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:44:00

VSC1 (SS1) -12 indoor high-voltage vacuum circuit breaker is an indoor high-voltage switchgear suitable for use in three-phase power systems with a rated voltage of 12KV and 50HZ. It is used as a protective and control electrical device. Due to the special advantages of vacuum circuit breakers, it is particularly suitable for frequent operation at rated current or multiple short circuit current breaking locations. The VSC1 (SS1) -12 indoor high-voltage vacuum circuit breaker is installed in a fixed manner and is mainly used for fixed switchgear. This circuit breaker can be used independently or for ring network power supply, box type transformers, or various non-standard power supply systems.

VSC1 (SS1) -12 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VSC1(VBM7)-12 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:43:51

VSC1 (VBM7) -12 indoor high-voltage vacuum circuit breaker is an indoor high-voltage switchgear suitable for use in three-phase power systems with a rated voltage of 12 kV and a frequency of 50HZ. It is used as a protective and control electrical device. Due to the special advantages of vacuum circuit breakers, it is particularly suitable for frequent operation at rated current or multiple short-circuit current breaking locations. The VSC1 (VBM7) -12 indoor high-voltage vacuum circuit breaker adopts a fixed installation and is mainly used for fixed switchgear. This circuit breaker can be used independently or for ring network power supply, box type transformers, or various non-standard power supply systems.

serial number	project		unit	data
one	rated voltage		KV	twelve
two	Maximum operating voltage		KV	six hundred and thirty	six hundred and thirty	six hundred and thirty
three	rated current		A	one thousand two hundred and fifty	one thousand two hundred and fifty	one thousand two hundred and fifty
four	Rated short-circuit breaking current		KA	twenty	twenty-five	thirty-one point five
five	Rated short-circuit closing current		KA	fifty	sixty-three	eighty
six	Rated peak withstand current		KA	fifty	sixty-three	eighty
seven	4S rated short-circuit withstand current		KA	twenty	twenty-five	thirty-one point five
eight	Rated insulation level	Power frequency withstand voltage (before and after rated breaking)	KV	42 (fracture 48)
		Impact withstand voltage (before and after rated breaking)		75 (fracture 84)
nine	Rated operating sequence			Fen-0.3-HeFen180s-HeFen
ten	mechanical life		time	one thousand
eleven	Rated short-circuit breaking current breaking times		time	fifty
twelve	Rated closing voltage of operating mechanism (DC)		V	110,220
thirteen	Rated opening voltage of operating mechanism (DC)		V	110,220
fourteen	Contact stroke		mm	11±1
fifteen	Overtravel (compression length of contact spring)		mm	3.5±0.5
sixteen	Three phase opening and closing bounce time		ms	��2
seventeen	Contact closing bounce time		ms	��2
eighteen	Average opening speed		m/s	0.9~0.12
nineteen	Average closing speed		m/s	0.4~0.8
twenty	Opening time	Under the highest operating voltage	s	��0.05
		At the lowest operating voltage		��0.08
twenty-one	closing time		s	zero point one
twenty-two	Main circuit resistance of each phase		�Ԧ�	sixty		fifty
twenty-three	Dynamic and static contacts, allowable wear and accumulated thickness		mm	three

[Indoor vacuum circuit breaker]VD9-12 Indoor Permanent Magnet High Voltage Vacuum Circuit Breaker

2026-6-10 19:43:42

VD9-12 indoor permanent magnet high-voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is an indoor switchgear used in 12KV power systems, serving as a protection and control unit for power grid equipment and industrial and mining enterprise power equipment. Due to the use of patented CDY permanent magnet mechanism and direct transmission structure design, the circuit breaker has excellent performance, making it particularly suitable for frequent operation or multiple short-circuit current breaking places. The circuit breaker is equipped with a dedicated propulsion mechanism to form a handcart unit.

[Indoor vacuum circuit breaker]VD��-24 Type Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:43:33

VD �� -24 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]VST1-24 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:43:25

VST1-24 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZNY2-10(6)/630-12.5 type intelligent permanent magnet vacuum circuit breaker

2026-6-10 19:43:16

ZNY2-10 (6)/630-12.5 Intelligent Permanent Magnet Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN73A-12 Intelligent Permanent Magnet Vacuum Circuit Breaker

2026-6-10 19:43:07

ZN73A-12 Intelligent Permanent Magnet Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN85B series indoor high-voltage vacuum circuit breaker

2026-6-10 19:42:58

The ZN85B circuit breaker adopts a structure of arc extinguishing chamber and operating mechanism arranged in front and behind. The operating mechanism adopts a spring operating mechanism of the same form as VS1, which is placed in the chassis in front of the vacuum arc extinguishing chamber. Its operating performance is more in line with the opening and closing performance of the arc extinguishing chamber, reducing unnecessary intermediate links and making the performance of the circuit breaker more reliable; Adopting an improved screw propulsion mechanism, it is labor-saving, stable, and has good self-locking performance

Main technical parameters of ZN85B series indoor high-voltage vacuum circuit breaker

Rated voltage: 40.5KV
Rated frequency: 50HZ
Rated current: 630A-2000A
Rated short-circuit breaking current: 20KA-31.5KA
The optimized VS1 spring operating mechanism is equipped with KYN61, KYN61B and other switch cabinets.

[Indoor vacuum circuit breaker]VS1 Permanent magnet vacuum circuit breaker

2026-6-10 19:42:50

The VS1-12 permanent magnet vacuum circuit breaker achieves all the functions of a traditional circuit breaker by combining an electromagnet with a permanent special combination. The vacuum arc extinguishing chamber is longitudinally installed in a camp shaped insulation cylinder, which is made of epoxy resin and fired using APG technology. The inner wall of the cylinder has a skirt edge to increase the creepage distance, which can resist creepage and reduce the influence of the surrounding environment. At the same time, in warm and severely polluted environments, it exhibits high resistance to voltage effects and has a mechanical life of 40000 times.

VS1 permanent magnet vacuum circuit breaker

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:42:41

ZN28C-12 is a derivative model of ZN28A-12, which has a handcart structure and can be assembled with KYN1-12 handcart, KYN18-12 handcart, JYN2-12 handcart, JYN3-12 handcart. The circuit breaker and operating mechanism are arranged vertically, and can be configured with CD17 electromagnetic mechanism or CT19 spring mechanism.

[Indoor vacuum circuit breaker]ZN28G-12 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:42:32

Product Overview
1. The ZN28A-12 series indoor AC high-voltage vacuum circuit breaker is mainly used in fixed switchgear, as a protection and control component for electrical equipment in industrial and mining enterprises, power plants, and substations, and is suitable for frequent operation in places.
2. ZN28G-12 is a derivative model of ZN28A-12, which adopts an integrated layout of circuit breaker and operating mechanism in front and back, making installation and use more convenient and stable. It can be directly configured with CD17 electromagnetic mechanism and CT19 spring mechanism.
3. ZN28C-12 is a derivative model of ZN28A-12, which has a handcart structure and can be assembled with KYN1-12 handcart, KYN18-12 handcart, JYN2-12 handcart, JYN3-12 handcart. The circuit breaker and operating mechanism are arranged vertically, and can be configured with CD17 electromagnetic mechanism or CT19 spring mechanism.

ZN28G-12 series indoor high-voltage vacuum circuit breaker models and their meanings

Environmental conditions for use
1. Surrounding air temperature: upper limit+40 ��, lower limit -10 �� (storage and transportation allowed at -30 ��);
2. Relative humidity: daily average not exceeding 95%; Monthly average not exceeding 90%;
Daily average saturated vapor pressure: The daily average is not greater than 2.2KPa, and the monthly average saturated vapor pressure is not greater than 1.8kPa,
3. Altitude: not exceeding 2000m (2500m is considered high prototype);
4. Seismic intensity: not exceeding 8 degrees;
5. A place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration.

Main technical parameters of ZN28G-12 series indoor high-voltage vacuum circuit breaker

serial number	project	unit	Parameters
serial number	project	unit	ZN28A-12/630��1000��1250-20	ZN28A-12/630��1250��1600-25	ZN28A-12/630��1250��2500-31.5
one	rated voltage	kV	twelve	twelve	twelve
two	rated current	A	630 1000 1250	630 1250 1600	1250 1600 2000 2500
three	Rated short-circuit breaking current	kA	twenty	twenty-five	thirty-one point five
four	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty
five	Rated withstand current (peak)	kA	fifty	sixty-three	eighty
six	Rated short-time withstand current	kA	twenty	twenty-five	thirty-one point five
seven	Rated short-time duration	s	four	four	four
eight	Rated short-circuit breaking current breaking times	time	fifty	fifty	fifty
nine	Rated operating sequence		Min-0.3s HeFen-180s HeFen
ten	1-minute power frequency withstand voltage (effective value)	kV	forty-two	forty-two	forty-two
eleven	Lightning impulse withstand voltage		seventy-five	seventy-five	seventy-five
twelve	mechanical life	time	ten thousand	ten thousand	ten thousand
thirteen	Contact opening distance	mm	11±1	11±1	11±1
fourteen	Contact itinerary	mm	4±1	4±1	4±1
fifteen	Synchronization of three-phase opening and closing	ms	��2	��2	��2
sixteen	Bouncing time of closing contact	ms	��2	��2	��2
seventeen	Center distance between poles	mm	250±5	250±5	250±5
eighteen	Average opening speed (before contact with oil buffer)	m/s	0.7��1.3	0.7��1.3	0.9��1.3
nineteen	Average closing speed	m/s	0.4��0.8	0.4��0.8	0.4��0.8
twenty	Accumulated allowable wear thickness of dynamic and static contacts	mm	three	three	three

[Indoor vacuum circuit breaker]ZNTW Spring mechanism single-phase circuit breaker

2026-6-10 19:42:24

ZNTW spring mechanism single-phase circuit breaker

[Indoor vacuum circuit breaker]ZNYII-10(6) Type Permanent Magnet High Voltage Vacuum Circuit Breaker

2026-6-10 19:42:15

ZNYII-10 (6) type permanent magnet mechanism high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN3,ZN5-10 type vacuum circuit breaker

2026-6-10 19:42:06

The ZN3. ZN5-10 vacuum circuit breaker is a three-phase AC 50 Hz indoor high-voltage circuit breaker. The circuit breaker body and operating mechanism are connected together and belong to the integral type. The mechanical life has increased from 2000 times for the CD10 mechanism of the original split low oil circuit breaker to 10000 times. The advantage of the integral circuit breaker is that it overcomes the dead zone of the connecting rod existing in the original CD10, improves the reliability of opening, and ensures the safety of equipment and the power grid. The ZN5-10 vacuum circuit breaker has a large breaking capacity and is suitable for frequent operation and situations with many faults

ZN3, ZN5-10 type vacuum circuit breaker

[Indoor vacuum circuit breaker]VBP Type Sealed High Voltage Vacuum Circuit Breaker

2026-6-10 19:41:57

VBP type solid sealed high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]3AE-SION type vacuum circuit breaker

2026-6-10 19:41:48

3AE-SION vacuum circuit breaker is the latest generation product developed and produced by Siemens based on more than 30 years of experience in vacuum product design and operation, targeting the Chinese power market. Incorporating the latest technology from Germany, it represents the latest development direction of vacuum switches. The compact design is suitable for any switch between 7.2-24KV, with maximum electrical parameters of 40KA and 4000A. The modular design simplifies installation, flexible wiring, and optional spacing and pole spacing to meet various special needs. The mechanical and electrical lifespan can reach 30000 times, and under normal operating conditions, maintenance is free within 10000 operation times. The innovative insulation design and the application of new materials have improved the insulation strength

The 3AE-SION vacuum circuit breaker adopts a large creepage insulation design and is equipped with the latest developed large creepage vacuum arc extinguishing chamber, which is more suitable for the technical standards of China's power system and the requirements of full insulation operation conditions. Complete and efficient technical support, and able to provide expert level solutions.

model

Rated voltage (KV)

Rated closing current (KA)

Rated short-circuit breaking current (KA)

Thermal stability time (S)

Rated current (A)

Rated power frequency withstand voltage (KV)

Rated lightning impulse withstand voltage (KV)

Distance (mm)

one hundred and fifty

one hundred and sixty

two hundred and ten

2751��

Polar distance (mm)

two hundred and five

two hundred and seventy-five

three hundred and ten

two hundred and five

two hundred and seventy-five

three hundred and ten

two hundred and five

two hundred and seventy-five

three hundred and ten

3AE

twelve

sixty-three

twenty-five

three

eight hundred

forty-two

seventy-five

one thousand two hundred and fifty

one thousand and six hundred

two thousand

two thousand and five hundred

three thousand one hundred and fifty

40001��

eighty

thirty-one point five

three

eight hundred

one thousand two hundred and fifty

one thousand and six hundred

two thousand

two thousand and five hundred

three thousand one hundred and fifty

40001��

one hundred

forty

three

eight hundred

one thousand two hundred and fifty

one thousand and six hundred

two thousand

two thousand and five hundred

three thousand one hundred and fifty

40001��

Fixed/withdrawable

The entire functional unit

1��

If you have any further requirements, please contact us.

[Indoor vacuum circuit breaker]3AH series vacuum circuit breaker

2026-6-10 19:41:40

The Siemens vacuum circuit breaker 3AH series is a new generation product developed and produced based on years of product design and operation experience, the original 3AF vacuum circuit breaker, and improvements made to meet the insulation requirements of the Chinese power system. The 3AH vacuum circuit breaker is strictly controlled by Shanghai Siemens Switchgear Co., Ltd. in accordance with the requirements of the ISO9002 quality assurance system for the procurement, production, and inspection of raw materials. It adopts first-class component processing and product testing equipment synchronized with Germany, and relies on rich manufacturing experience to locally organize and produce high-tech products. The vacuum arc extinguishing chamber of the circuit breaker is manufactured using one-time sealing technology, and the contact material is Cr Cu alloy, which is melted by arc. The contact adopts advanced design shape and structure, with extremely high arc resistance and very small arc voltage drop. Therefore, while ensuring the rated short-circuit current for breaking, the volume of the arc extinguishing chamber can have the smallest size. Siemens, a new type of vacuum arc extinguishing chamber, also has the characteristic of low cutoff value. Therefore, when the circuit breaker is used to disconnect inductive loads such as transformers, there will be no harmful operating overvoltage. The excellent mechanical characteristics of the vacuum arc extinguishing chamber and spring operation also enable the 3AH vacuum circuit breaker to successfully close and open the capacitor group multiple times without the occurrence of reigning overvoltage. The operating mechanism of the circuit breaker adopts spring energy storage, which can be manually or electrically stored. In this organization, all components are tightly processed and assembled. Moreover, key components and materials are manufactured using special processes. In this way, it ensures that the entire operating mechanism has minimal friction, precise coordination between components, and reliable movement.

Technical parameters of 3AH series vacuum circuit breaker

model	rated voltage	Rated short-circuit closing current	Rated short-circuit breaking current	Thermal stability time	rated current	Rated power frequency withstand voltage (to ground/break)	Rated lightning impulse withstand voltage (to ground/fracture)
	(kV)	(kA)	(kA)	(s)	(A)	(kV)1)	(kV)1)	(mm)
3AH5404-1	12	63	25	4	800	42/48	75/85	210
3AH5404-2	12	63	25	4	1250	42/48	75/85	210
3AH3114-3	12	63	25	4	1600	42/48	75/85	210
3AH3114-4	12	63	25	4	2000	42/48	75/85	210
3AH3114-6	12	63	25	4	2500	42/48	75/85	210
3AH5115-2	12	80	31.5	4	1250	42/48	75/85	210
3AH3115-3	12	80	31.5	4	1600	42/48	75/85	210
3AH3115-4	12	80	31.5	4	2000	42/48	75/85	210
3AH3115-6	12	80	31.5	4	2500	42/48	75/85	210
3AH3116-2	12	110	40	4	1250	42/48	75/85	210
3AH3116-3	12	110	40	4	1600	42/48	75/85	210
3AH3116-4	12	110	40	4	2000	42/48	75/85	210
3AH3116-6	12	110	40	4	2500	42/48	75/85	210
3AH3116-7	12	110	40	4	3150	42/48	75/85	210
3AH3116-8	12	110	40	4	40002)	42/48	75/85	210
3AH3187-2	12	125	50	3	1250	42/48	75/85	210
3AH3187-3	12	125	50	3	1600	42/48	75/85	210
3AH3187-4	12	125	50	3	2000	42/48	75/85	210
3AH3187-6	12	125	50	3	2500	42/48	75/85	210
3AH3187-7	12	125	50	3	3150	42/48	75/85	210
3AH3187-8	12	125	50	3	40002)	42/48	75/85	210
1) If you require higher insulation levels and special distances, please contact us.
2) OEM switchgear forced air cooling.

[Indoor vacuum circuit breaker]3AH2-EP Type Sealed Vacuum Circuit Breaker

2026-6-10 19:41:31

The 3AH2-EP solid sealed vacuum circuit breaker is designed to meet the demand of the Chinese market for high-quality vacuum circuit breakers and easy adaptation to mainstream switchgear experience. Siemens has launched a new generation of 3AH2-EP solid sealed vacuum circuit breakers, which are suitable for use as protection and control appliances in three-phase power systems with a rated voltage of 12KV and a frequency of 50Hz, especially in places with frequent operation. The Siemens 3AH2-EP vacuum circuit breaker adopts a composite insulation method and a solid sealed structure. It is different from insulation covers and insulation cylinder structures. It is a circuit breaker composed of a vacuum arc extinguishing chamber and conductive connection parts sealed with epoxy resin through a special process to form a pole, and Siemens' long-life 3AH2 series mechanism. The Siemens 3AH2-EP vacuum circuit breaker can be used for both central and fixed switchgear, and can be easily interchanged with mainstream circuit breakers in China, with wide compatibility and interchangeability.

Technical parameters of 3AH2-EP solid sealed vacuum circuit breaker

project	unit	data
rated voltage	kV	12
rated frequency	Hz	50
Rated power frequency withstand voltage	kV	42
Rated lightning impulse withstand voltage (peak)	kV	75
rated current	A	Up to 3150
Rated short-circuit breaking current	kA	Up to 40
Rated short-time withstand current (4S)	kA	Up to 40
Rated short-circuit closing current (peak)	kA	Up to 100
Rated peak withstand current (peak value)	kA	Up to 100
Electrical lifespan	time	274 (E2 level)
Rated operation sequence automatic reclosing		O-0.3s-CO-180s-CO
mechanical life	time	30,000*
Secondary circuit power frequency withstand voltage (1min)	V	2,000
Meeting center distance	mm	��1600A 210 ± 1.5 2000~3150A 275 ± 1.5
Closing and opening different periods	ms	�� 2
Closing bounce time	ms	�� 2
closing time	ms	<75
Opening time	ms	<65

[Indoor vacuum circuit breaker]3AH Vacuum generator outlet circuit breaker

2026-6-10 19:41:22

The 3AH high current generator outlet vacuum circuit breaker has become a standard for up to 4500 amperes in numerous electro-optical applications around the world. Among them, 3AH is the world's first 63KA and 72KA vacuum circuit breakers that have completed type tests strictly in accordance with the generator outlet circuit breaker standard IEEE C37.013. With continuous research, experimentation, and development in the field of vacuum technology, the product range has been expanded to a rated current of 6300A and a short-circuit breaking current of 72KA.

model	Rated voltage (KV)	Rated closing current (KA)	Rated short-circuit breaking current	Thermal stability time (S)	Rated current (A)	Rated power frequency withstand voltage (KV)	Rated lightning impulse withstand voltage (KV)	Center to center distance (mm)
3AH3	seventeen point five	one hundred and thirty-seven	fifty	three	three thousand one hundred and fifty	42/50(2)	95/110(2)	210/275(2)
3AH3	seventeen point five	one hundred and thirty-seven	fifty	three	4000(1)	42/50(2)	95/110(2)	two hundred and seventy-five
3AH3	seventeen point five	one hundred and thirty-seven	fifty	three	five thousand	fifty	one hundred and ten	three hundred
3AH3	seventeen point five	one hundred and thirty-seven	fifty	three	six thousand and three hundred	fifty	one hundred and ten	three hundred
3AH3	seventeen point five	160/173(2)	sixty-three	three	three thousand one hundred and fifty	42/50(2)	95/110(2)	two hundred and seventy-five
3AH3	seventeen point five	160/173(2)	sixty-three	three	4000(1)	42/50(2)	95/110(2)	two hundred and seventy-five
3AH3	seventeen point five	one hundred and seventy-three	sixty-three	three	five thousand	fifty	one hundred and ten	three hundred
3AH3	seventeen point five	one hundred and seventy-three	sixty-three	three	six thousand and three hundred	fifty	one hundred and ten	three hundred
3AH3	seventeen point five	one hundred and ninety-eight	seventy-two	three	three thousand one hundred and fifty	fifty	one hundred and ten	two hundred and seventy-five
3AH3	seventeen point five	one hundred and ninety-eight	seventy-two	three	4000(1)	fifty	one hundred and ten	two hundred and seventy-five
3AH3	seventeen point five	one hundred and ninety-eight	seventy-two	three	five thousand	fifty	one hundred and ten	three hundred
3AH3	seventeen point five	one hundred and ninety-eight	seventy-two	three	six thousand and three hundred	fifty	one hundred and ten	three hundred
(1) Can provide circuit breakers with a rated current of 4500A
(2) We can provide corresponding specifications of products according to different technical parameter requirements

3AH vacuum generator outlet circuit breaker

[Indoor vacuum circuit breaker]CVS Sealed pole vacuum circuit breaker

2026-6-10 19:41:14

1�� Significant features:
CVSl vacuum circuit breaker is equipped with CG68 spring mechanism or CG69 permanent magnet mechanism, which is an independent integral mechanism
Simple structure with few components,
Compact structure, small volume, and light weight;
Fully functional and highly reliable,
The distribution of operation buttons and status indicators is neat and centralized;
Easy maintenance:
During maintenance, the entire mechanism can be replaced and repaired,
Parts can also be replaced and repaired on the circuit breaker.

2�� The latest SIEMENS vacuum arc extinguishing chamber technology
Low cut-off value, low contact resistance,
High mechanical and electrical lifespan, with minimal contact wear during the lifespan
Longitudinal magnetic field contact

3�� Sealed main circuit
The vacuum arc extinguishing chamber is vertically sealed inside an insulating cylinder to prevent damage to the 1G vacuum extinguishing chamber caused by external factors
Flexible sealing materials can reduce the impact of circuit breaker operation vibration on vacuum arc extinguishing chambers
Effectively blocking the creepage on the surface of the vacuum extinguishing chamber, reducing its volume.

4�� Coordination between operating mechanism and vacuum arc extinguishing chamber
Using PRO-E kinetic analysis and calculation, verified through experiments. With this cooperation, the contact burns are minimal
Compact structural design
The circuit breaker has few components, a reasonable and compact structural layout, and the coordination between the operating mechanism and the vacuum arc extinguishing chamber

5�� CVS solid sealed pole vacuum circuit breaker has a wide range of applications
The circuit breaker can be applied to various mid mounted removable switchgear such as KVN28 and KYN79, and can also be fixedly installed.

6�� Range of CVS solid sealed pole vacuum circuit breaker

Rated maggot circuit breaking current	Rated short-circuit opening and closing current	rated current	12kV	12kV (4000M)	24kV
25kA	63kA	630��1250A	CVSl	CVSl	CVSl
		1600A	CVSl	CVSl	CVSl
		1250A	CVSl	CVSl	CVSl
31��5kA	100kA	1600A	CVSl	CVSl	CVSl
31��5kA	100kA	2000A	CVSl	CVSl	CVSl
		1250-2000A	CVSl	CVSl	CVSl
40kA	130kA	2500 to 3150A	CVSl	CVSl	CVSl
40kA	130kA	1600 to 2500A	CV51	CVSl	CVSl
50kA	130kA	1250 to 4000A	CVSl	CVSl	CVSl

7�� Selection table for bundled contacts

Rated current (A)

six hundred and thirty

one thousand two hundred and fifty

630-2000

1600 to 2000

2500��3150

1250-4000

Rated short-circuit breaking

Current (kA)

20��21

20��25

31��5

31��5��40

ten

Static contact diameter (mm)

Ø3

Ø49

Ø79

Ø109

8�� Technical data
Main technical parameters table of circuit breaker

serial number	Name		unit	Numerical value
l	rated voltage		kV	twelve
	Rated Absolute	LMIN32 frequency withstand voltage	kV	forty-two
two	Edge level	Impulse withstand voltage (peak value)		seventy-five
three	rated current		A	six hundred and thirty	one thousand two hundred and fifty		one thousand and six hundred	two thousand	one thousand two hundred and fifty �� two thousand		two thousand and five hundred �� three thousand one hundred and fifty
four	Rated short-circuit breaking current			twenty-five	31��5				forty
five	Rated short-circuit closing current (peak)			eighty	80(100)				100(130)
six	Rated peak withstand current		kA	eighty	80(100)				100(130)
seven	Rated short-time withstand current			twenty-five	31��5				forty
eight	Electrical lifespan		time	thirty
nine	Rated short-circuit current duration		S	four
ten	Rated operating sequence			Split -0.3s - Split -180s - Split - Split
eleven	mechanical life		time	twenty thousand		twenty thousand				twenty thousand
twelve	Rated breaking current of a single capacitor bank		A	six hundred and thirty
thirteen	Rated back-to-back capacitor bank breaking current		A	four hundred

Note: In parentheses, to increase the closing current value, the user's special request is to provide
CVS1-12/T630-25��CVS1-12/T1250-31.5,CVS1-12/T1600-31.5
Mechanical characteristic parameter table

serial number	Name		unit	Numerical value
one	Contact opening distance			eight^+0.5_-1.5
two	Contact itinerary		mm	3��5±0��5
three	Center distance between phases			170±1��5 210±1��5
four	Bouncing time of closing contact			��2
five	Three phase asynchronous disconnection			��2
six	Opening time	highest
	When the operating voltage is	rated		30-50
		minimum
seven	closing time		ms	35-75
eight	Opening speed (just 5mm)		m/s	1��4±0��2
nine	Average opening speed (5mm before closing)			0��8±O��2

CVS1-12/T2000-31.5��CVS1-12/T1250-40��CVS1-12/T3150-40
Mechanical characteristic parameter table

serial number	Name		unit	Apply value
one	Contact opening distance			10±1
two	Contact itinerary		mm	3±O��1
three	Center distance between phases			275±1��5
four	Bouncing time of closing contact			��2
five	Three phase asynchronous disconnection			��2
		highest
six	Opening time When the operating voltage is	rated		30-65
		minimum
seven	closing time		ms	35-75
eight	Opening speed (just 5mm)		m��s	1.4±0.2
nine	Average opening speed (5mm before closing)			0.8±0.2

energy storage motor

rated voltage

(V)

Huding input power

(W)

Normal operating voltage range

(V)

Energy storage time

(S)

DC220��DCll0

seventy-five

85% -110% rated voltage

��15

*The operating voltage allows the use of AC and DC power sources.

Opening and closing coil

	closing coil		trip coil
Rated operating voltage (Y)	AC220��DC220	ACll0��DCll0	AC220��DC220	ACll0��DCll0
Coil current (A)	one point four five	two point two	one point four five	two point two
Normal operating voltage range	85% to 110% rated voltage		65% to 120% rated voltage

[Indoor vacuum circuit breaker]ZN-10C series indoor handcart type high-voltage vacuum circuit breaker

2026-6-10 19:41:05

The ZN-10C series indoor handcart type high-voltage vacuum circuit breaker is a high-voltage indoor switchgear with a rated voltage of 10KV three-phase slurry 50HZ. It is widely used in mining enterprises, power plants, and substations as a protection and control device for high-voltage electrical equipment, especially suitable for breaking heavy loads and frequent operations.
This series of circuit breaker operating mechanisms can be equipped with CD10, CD17 electromagnetic operating mechanisms or CT8, CT17, CT19 spring operating mechanisms, and comply with relevant standards such as IEC-56 and GB1984-89 �� AC high-voltage circuit breaker ��.

Normal usage conditions
The altitude should not exceed 1000m;
The upper limit of ambient temperature is+40 ��, and the lower limit is -25 ��;
Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%
The surrounding air should not be significantly polluted by corrosive or combustible gases, water vapor, etc;
There is no frequent severe vibration.

structural characteristics
The ZN-10C series indoor handcart type high voltage vacuum circuit breaker is a handcart driver type structure that can directly enter the KYNI-10 or JYN2-10 handcart cabinet. Handcarts of the same specifications are completely interchangeable. The handcart has a reliable locking device, and the entry and exit of the cabinet are driven by a worm gear mechanism.

Main technical parameters

name		unit	data
rated voltage	KV		ten
maximum voltage	KV		eleven point five
rated current	A		630 1250 1600 2000 3150
Rated breaking current	KA		20 31.5 40
Rated closing current (peak value)	KA		50 80 100
Thermal stability current	KA/S		20/4 31.54 40/4
closing time	s		<0.15
Opening time	S		<0.16
Rated short-circuit breaking times	time		thirty
Rated operating cycle			Fen-0.3 HeFen-180S HeFen
One minute public frequency withstand voltage (effective value)	KV		forty-two
Rated current breaking times	time		one thousand
mechanical life	time		one thousand

ZN-10C series indoor handcart type high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN63S-12(VS1+) Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:40:56

The ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor high-voltage switchgear with a rated voltage of 7.2-12 kV. As a protection and control unit for power grid equipment and power equipment in industrial and mining enterprises.

The circuit breaker complies with China's national standards GB1984-89 "AC High Voltage Circuit Breaker", JB3855-96 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breaker", DL403-91 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breaker" and relevant IEC standards, and has reliable interlocking function.

The ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker can perform frequent operations and has the ability to open and close multiple times and quickly reclose.
The ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or assembled with the chassis to form a handcart unit for use.

Normal operating conditions of ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker
a. Altitude: not exceeding 1000m
b. Environmental temperature
Maximum temperature:+40 ��
Minimum temperature: -15 �� (storage and transportation allowed at -30 ��)
c. Environmental humidity
Daily average relative humidity: �� 95%
Monthly average relative humidity: �� 90%
Daily average saturated vapor pressure: �� 2.2 × 10-3 MPa
Monthly average saturated vapor pressure: �� 1.8 × 10-3 MPa
d. A place without fire or explosion hazards, severe pollution, chemical corrosion, and severe vibration.
If there are special usage conditions, please inform and negotiate with the manufacturer when placing an order.

Model and meaning of ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker

Technical data

1. Main technical parameters of circuit breaker

serial number	project	unit	Numerical value
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	Rated lightning impulse withstand voltage (peak)	kV	seventy-five
four	Rated short-time power frequency withstand voltage (1min)	kV	forty-two
five	Rated short-circuit breaking current	kA	twenty	twenty-five	thirty-one point five	forty
six	rated current	A	six hundred and thirty	six hundred and thirty	one thousand two hundred and fifty	one thousand two hundred and fifty
			one thousand two hundred and fifty	one thousand two hundred and fifty	one thousand and six hundred	one thousand and six hundred
					two thousand	two thousand
					two thousand and five hundred	two thousand and five hundred
						three thousand one hundred and fifty
seven	Rated short-time withstand current (effective period)	kA	twenty	twenty-five	thirty-one point five	forty
eight	Rated peak withstand current (peak)	kA	fifty	sixty-three	eighty	one hundred
nine	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty	one hundred
ten	Rated short-circuit current duration	s	four
eleven	mechanical life	time	thirty thousand			ten thousand
twelve	Secondary circuit power frequency withstand voltage (1min)	V	two thousand
thirteen	Rated operating sequence	O-t-CO-t^one-CO

Note: 20kA, 25kA, 31.5kA t=0.3s t^one=180s 40kA t=180s��t1=180s

2. Mechanical characteristic parameters of circuit breaker

serial number	project	unit	Numerical value
one	Contact opening distance	mm	9±1
two	Contact itinerary	mm	3±0.5
three	Contact closing bounce time	ms	��2(40kA��3)
four	Three phase asynchronous opening and closing	ms	��2
five	Average opening speed	m/s	1.1±0.2
six	Average closing speed	m/s	0.6±0.2
seven	Opening time (rated voltage)	ms	��50
eight	Closing time (rated voltage)	ms	��100
nine	Rated closing and opening operating voltage	V	AC110/220 DC110/220
ten	Rated voltage of energy storage motor	V	AC110/220 DC110/220
eleven	Rated power of energy storage motor	W	70(40kA 100W)
twelve	Energy storage time	s	ten
thirteen	Accumulated allowable wear thickness of dynamic and static contacts	mm	three
fourteen	Main electrical circuit resistance	630A-1250A	��45
		1600-2000A	��35
		2500-3150A	��25
fifteen	Contact pressure of closing contact	20kA-25kA	2000N-2500N
		31.5kA	3000N-3500N
		10kA	4500N-5000N

Product structure and working principle
1. Overall structure of circuit breaker
ZN63S-12(VS1⁺��The overall structure of the indoor high-voltage vacuum circuit breaker adopts the form of operating mechanism and arc extinguishing chamber arranged in front and behind, and the main electrical circuit part is a three-phase floor standing structure. The upper and lower outlet bases and arc extinguishing chambers are installed in a tubular insulation cylinder made of epoxy resin cast using APG technology, which is particularly resistant to creeping electricity. This structural design makes it difficult for dust to accumulate on the surface of the arc extinguishing chamber, which not only prevents the vacuum arc extinguishing chamber from being damaged by external factors but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.

2. Operating mechanism structure
ZN63S-12(VS1⁺��The indoor high-voltage vacuum circuit breaker is equipped with a new SS1 spring operated mechanism, which has manual and electric energy storage functions, a concise structure, and high reliability. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber, and the chassis of the circuit breaker is also used as the framework for the operating mechanism. ZN63S-12(VS1+��The indoor high-voltage vacuum circuit breaker integrates the vacuum arc extinguishing chamber and the operating mechanism into a unified whole, making the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reducing unnecessary intermediate links, lowering energy consumption, and making ZN63S-12 (VS1⁺��The performance of indoor high-voltage vacuum circuit breakers is more reliable. ZN63S-12(VS1⁺��The indoor high-voltage vacuum circuit breaker can be installed in both mobile switchgear and fixed switchgear.

3. Arc extinguishing principle
The vacuum arc chamber used in the circuit breaker has a very high vacuum degree. When the moving and stationary contacts are energized and disconnected under the action of the operating mechanism, an arc will be generated at the contact tip. At the same time, an appropriate longitudinal magnetic field will be generated in the contact gap to maintain the diffusion type of vacuum arc, and evenly distribute the arc on the contact surface for combustion, while maintaining a low arc voltage. When the current naturally crosses zero, residual ions, electrons, and metal vapor can recombine or accumulate on the contact surface and screen cover in a subtle amount of time. The dielectric insulation strength of the arc extinguishing chamber fracture quickly recovers, thereby extinguishing the arc and achieving the purpose of breaking. Due to the use of longitudinal magnetic field vacuum arc extinguishing chamber in vacuum circuit breakers. Therefore, it has a strong and stable ability to interrupt current.

4. Anti misoperation interlock
Circuit breakers can provide comprehensive and reliable anti misoperation functions.
a. After the circuit breaker is closed, it cannot be closed again before the circuit breaker is opened;
b. After the circuit breaker is closed, if the closing electrical signal is not removed in time, the internal anti bounce control circuit of the circuit breaker will cut off the closing circuit to prevent multiple reclosing;
c. When the handcart circuit breaker is not in the test position or working position, the circuit breaker cannot be closed to prevent it from entering the load zone in the closed state;
d. After the handcart circuit breaker is closed in the working or testing position, the handcart cannot move to prevent pulling out or pushing the load area in the closed state;
e. The circuit breaker can be configured with a closing lock according to user needs to prevent manual closing operations when the secondary control power supply is not connected.

Operation and Maintenance
Pre-installation check
a. After opening the circuit breaker, it should be checked for any damage, whether the product nameplate and certificate of conformity match the purchase order, and whether they are in good condition before cleaning the surface dust, especially the insulation surface;
b. Operate the circuit breaker manually according to the regulations for energy storage, closing, and opening, and pay attention to observing whether the relevant instructions are correct;
c. Use the operating power supply to operate the circuit breaker for energy storage, closing and opening, and pay attention to observing whether the relevant instructions are correct;
d. Conduct power frequency withstand voltage insulation test;
e. During formal operation, please remove the dust protection cover as required for rated currents of 1600A and above;
f. Insert the dedicated push handle into the push hole, shake clockwise to advance, and counterclockwise to exit. The total stroke is 200mm. In the open state, shake the handle evenly to reach the working position or test position, and at the same time, the corresponding indicator light of the cabinet will light up. Do not use excessive force to damage the interlocking mechanism and position signal.

[Indoor vacuum circuit breaker]VSM series high-voltage vacuum circuit breaker

2026-6-10 19:40:48

VSM series high-voltage vacuum circuit breaker

1. Scope of use
The ZN63A-12 (VS1-12) series indoor high-voltage vacuum circuit breaker is a three-phase AC 50HZ indoor high-voltage distribution device with a rated voltage of 12KV or below. Can be matched with KYN28-12 (Z) (GZS1) switchgear. Suitable for control and protection of transmission and distribution systems such as power plants and substations, especially in places with frequent operations.

The operating mechanism of the VSM series high-voltage vacuum circuit breaker is a spring energy storage type, which can be used for AC or DC operation and can be used for manual operation.

2. Usage conditions
a) Altitude: not exceeding 1000m;
b) Surrounding air temperature: maximum+40oC, minimum -10oC;
c) Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
d) Water vapor pressure: daily average not exceeding 2.2kPa, monthly average not exceeding 1.8kPa;
e) Places without fire, explosion, severe pollution, chemical corrosion, and severe vibration;

3. Advantages of permanent magnets
·Low number of components and high reliability
·Long lifespan, reaching over 50000 cycles
·The main circuit adopts advanced fixed sealing poles, which have stronger anti pollution ability and are more suitable for harsh environments
·The perfect combination of permanent magnet mechanism and circuit breaker greatly improves the electrical performance of the circuit breaker. Even for high current 40kA/4000A short-circuit breaking, the automatic reclosing operation sequence test passed completely
·Double coil bistable structure, electromagnetic operation, permanent magnet retention
·Low power consumption of opening and closing coils
·No energy storage capacitor
·Maintenance free

[Indoor vacuum circuit breaker]VS1+ series indoor high-voltage vacuum circuit breaker

2026-6-10 19:40:39

The VS1-12 indoor high-voltage vacuum circuit breaker is an indoor switchgear for three-phase AC 50Hz rated voltage 12kV power systems. It serves as a protection and control unit for power grid equipment and industrial and mining enterprise power equipment. Suitable for frequent operation at rated working current, or places where short-circuit current is broken multiple times.
The circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or equipped with a dedicated propulsion mechanism to form a handcart unit.

VS1+series indoor high-voltage vacuum circuit breaker operating environment

Surrounding air temperature: upper limit+40 ��, lower limit -15 ��;
B Altitude: �� 100m (if altitude needs to be increased, the rated insulation level will be correspondingly increased);
C amplitude: earthquake magnitude does not exceed 8 degrees;
The daily average relative humidity of the air is not greater than 95%, and the monthly average is not greater than 90%
A place without fire, explosion hazards, serious pollution, chemical corrosion, and severe vibration.

Main technical parameters of VS1+series indoor high-voltage vacuum circuit breaker

serial number	name		name	data
one	rated voltage		kV	twelve
two	rated frequency		Hz	fifty
three	Rated insulation level	1-minute power frequency withstand voltage	kv	Ground/phase 42/48
		Lightning impulse withstand voltage (peak value)		Ground/phase to phase 75/85
four	Rated short-circuit breaking current		kA	twenty	twenty-five	thirty-one point five	forty
five	rated current		A	six hundred and thirty	six hundred and thirty	1250 1600	1250 1600
				one thousand two hundred and fifty	one thousand two hundred and fifty	2000 2500	2000 2500
six	Rated short-time withstand current (effective value)		kA	twenty	twenty-five	thirty-one point five	forty
seven	Rated peak withstand current (peak)			fifty	sixty-three	eighty	one hundred
eight	Rated short-circuit closing current (peak)			fifty	sixty-three	eighty	one hundred
nine	Rated short-circuit current duration		S	four
ten	mechanical life		time	twenty thousand
eleven	Secondary circuit power frequency withstand voltage (1min)		V	two thousand
twelve	Rated operating sequence			Division-t-and-t1-in-for-t1
Note: 20kA, 25kA, 31.5kA t=0.3s t1=180s; 40kA t=180s t1=180s

VS1+series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZK1-630 type vacuum circuit breaker

2026-6-10 19:40:29

ZK1-630 vacuum circuit breaker is suitable for industrial and mining enterprises, power plants, substations, and frequent operations with AC 50HZ, rated voltage up to 1140KV, and rated current up to 630A. Mainly used for the protection and control of electrical equipment.
The contact belongs to the vacuum medium, therefore, it has small volume, high pressure resistance, high breaking capacity, long service life, and does not require maintenance. Especially due to its advantages of not exposing the arc and being safe and reliable, it is widely used in industrial sectors such as coal, power, chemical, metallurgy, and petroleum.

Technical parameters of ZK1-630 vacuum circuit breaker
Rated working voltage 1140V
Rated working current 630A
Rated short-circuit breaking current 12.5KA
Rated short-circuit breaking frequency 16 times
Rated current breaking frequency 3000 times
Mechanical lifespan of 15000 cycles
Rated short-time withstand current 12.5KA
Rated short-time withstand time 4S
Rated power frequency withstand voltage 10KV
Rated opening torque 4 ± 0.4mm, contact self closing force 115 ± 11N
Contact reaction force at rated opening moment 140 ± 14N
Contact resistance under rated contact pressure �� 100 ��

Outline dimensions and installation dimensions of ZK1-630 vacuum circuit breaker

ZK1-630 vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN20-500 type vacuum circuit breaker

2026-6-10 19:40:20

The ZN20-500 vacuum circuit breaker is suitable for industrial and mining enterprises, power plants, substations, and frequent operations with AC 50HZ, rated voltage up to 1140KV, and rated current up to 500A. Mainly used for the protection and control of electrical equipment.
The contact belongs to the vacuum medium, therefore, it has small volume, high pressure resistance, high breaking capacity, long service life, and does not require maintenance. Especially due to its advantages of not exposing the arc and being safe and reliable, it is widely used in industrial sectors such as coal, power, chemical, metallurgy, and petroleum.

Technical parameters of ZN20-500 vacuum circuit breaker
Rated working voltage 1140V
Rated working current 500A
Rated short-circuit breaking current 9KA
Rated short-circuit breaking frequency 16 times
Rated current breaking frequency 3000 times
Mechanical lifespan of 15000 cycles
Rated short-time withstand current 9KA
Rated short-time withstand time 4S
Rated power frequency withstand voltage 10KV
Rated opening torque 4 ± 0.4mm
Contact self closing force 100 ± 10N
Contact reaction force at rated opening moment 140 ± 14N
Contact resistance under rated contact pressure �� 100 ��

External dimensions and installation dimensions:

ZN20-500 vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN7-400 type low-voltage vacuum circuit breaker

2026-6-10 19:40:12

The ZN7-400 vacuum circuit breaker is suitable for industrial and mining enterprises, power plants, substations, and frequent operations with AC 50HZ, rated voltage up to 1140KV, and rated current up to 400A. Mainly used for the protection and control of electrical equipment.
The contact belongs to the vacuum medium, therefore, it has small volume, high pressure resistance, high breaking capacity, long service life, and does not require maintenance. Especially due to its advantages of not exposing the arc and being safe and reliable, it is widely used in industrial sectors such as coal, power, chemical, metallurgy, and petroleum.

Technical parameters of ZN7-400 low-voltage vacuum circuit breaker
Rated working voltage 1140V
Rated working current 400A
Rated short-circuit breaking current 8KA
Rated short-circuit breaking frequency 16 times
Rated current breaking frequency 3000 times
Mechanical lifespan of 20000 cycles
Rated short-time withstand current 8KA
Rated short-time withstand time 4S
Rated power frequency withstand voltage 10KV
Rated opening torque 4 ± 0.4mm
Contact self closing force 100 ± 10N
Contact reaction force at rated opening moment 140 ± 14N
Contact resistance under rated contact pressure �� 100 ��

Dimensions and installation dimensions of ZN7-400 low-voltage vacuum circuit breaker:

ZN7-400 Low Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:40:03

The ZN73D-12 indoor AC high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz indoor high-voltage switchgear with a rated voltage of 7.2-12kV. The circuit breaker complies with China's national standards GB/T1984 "High Voltage AC Circuit Breakers", JB3855 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breakers" and relevant IEC standards, and has reliable interlocking

Function.
Circuit breakers can perform frequent operations and have the ability to open and close multiple times and quickly reclose.
The circuit breaker is designed as a front and rear split structure, which can be used as a fixed installation unit or as a separate handcart with the chassis.
Product features: 1 Integrated structure;
2. Enclosed installation of arc extinguishing chamber;
3. High performance vacuum arc extinguishing;
4. Good mechanical properties;
5. Flexible and diverse installation forms.

[Indoor vacuum circuit breaker]ZN85-40.5/600-31.5 Miniature Circuit Breaker

2026-6-10 19:39:54

ZN85-40.5/600-31.5 miniature circuit breaker is suitable for three-phase power systems with AC 50Hz of 40.5kV and below. It is used for opening and closing load current, overload current, and short-circuit current, and is particularly suitable for places with frequent operation. It has the function of multiple disconnections and rapid reclosing. Circuit breakers and propulsion mechanisms are equipped as separate handcarts and KYN61 withdrawable switchgear.

ZN85-40.5/600-31.5 Miniature Circuit Breaker Performance Characteristics:
Operating mechanism: The spring operating mechanism is assembled separately with the switch and has manual and electric closing and opening functions. The mechanism is equipped with a trip device, operation frequency recorder, energy storage indicator device, and opening/closing indicator device, and can also be equipped with anti jumping devices. Removable handcart structure: The circuit breaker moving propulsion mechanism is installed on the circuit breaker housing, and there is a reliable action interlock between it and the circuit breaker. Through it, the circuit breaker frame and cabinet are reliably grounded.

[Indoor vacuum circuit breaker]ZN73 series indoor AC high-voltage vacuum circuit breaker

2026-6-10 19:39:46

The ZN73-12 indoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz indoor device with a rated voltage of 12kV. It is suitable for switching various types of loads and frequent operations, and can be used for the protection and control of industrial and mining, enterprise, power plant equipment, and substation electrical facilities.
The circuit breaker complies with the 1984 and JB3855 standards.

Normal working conditions
1. Surrounding air temperature: upper limit not exceeding+40 ��; The lower limit shall not be lower than -10 ��.
2. Altitude: The altitude shall not exceed 1000m.
3. Humidity: Relative humidity: Daily average not exceeding 95%, monthly average not exceeding 90%; Saturated vapor pressure: The daily average value shall not exceed 2.2 × 10-3Mpa, and the monthly average value shall not exceed 1.8 × 10-3Mpa. During periods of high humidity, condensation may occur when the temperature drops sharply.
4. Seismic intensity: The seismic intensity shall not exceed 8 degrees.
5. The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.
6. There is no frequent severe vibration in the place of use.
Note: If users need circuit breakers that exceed the normal usage conditions mentioned above, they can negotiate with our company to customize them.

Meaning and Classification of ZN73 Series Indoor AC High Voltage Vacuum Circuit Breaker Models

Main technical parameters of ZN73 series indoor AC high-voltage vacuum circuit breaker

The mechanical characteristic parameters of the circuit breaker are shown in Table 2.

KO internal anti bounce relay Y1 locking electromagnet (optional) DO diode
HQ closing release R0, R1 current limiting resistor TQ opening release
Y4- Low voltage release (optional) M-energy storage motor with spring operated mechanism
Y7~Y9- Indirect overcurrent release (optional) S2- Auxiliary switch for locking electromagnet (optional) V0~V4- Rectification element S1- Micro switch for energy storage
P-Manual Operating Mechanism QF - Auxiliary Switch for Main Contact of Circuit Breaker

Internal anti bounce relay HQ closing release of KO organization
DO diode TQ circuit breaker
R0, R1- current limiting resistor M-spring operated energy storage motor
Y4- Low voltage release (optional) S9- Auxiliary switch for working position
Y7~Y9- Indirect overcurrent release (optional) S8- Auxiliary switch for test position
V0~V4- rectifier component S2- auxiliary switch for locking electromagnet (optional)
P-Manual operating mechanism S1 Micro switch for energy storage
Y1 locking electromagnet (optional) QF auxiliary switch for circuit breaker main contact

Figure 2 Internal wiring diagram of handcart circuit breaker
Appearance and installation dimensions

Note: The numbers in parentheses indicate the size of circuit breakers with a rated current greater than 1600A.
Figure 1: Outline, Installation, and Dimensional Diagram of Fixed Circuit Breaker

Note: 1. The travel distance of the handcart in the cabinet is 200mm;
2. The numbers in parentheses indicate the external dimensions of circuit breakers with a rated current greater than or equal to 1600A.

[Indoor vacuum circuit breaker]ZN��-12 Indoor mounted AC high-voltage vacuum circuit breaker

2026-6-10 19:39:37

ZN �� -12 indoor mounted AC high voltage vacuum circuit breaker is an indoor high voltage switchgear suitable for use in three-phase power systems with a rated voltage of 12kV and a frequency of 50Hz. It is used as a protective and control electrical device. Due to the special advantages of vacuum circuit breakers, it is particularly suitable for frequent operations under rated current or multiple short circuit current disconnections.
The ZN �� -12 indoor mounted AC high-voltage vacuum circuit breaker adopts a fixed installation, mainly used for fixed switchgear. This circuit breaker can be used alone or for ring network power supply, box type transformers, or various non-standard power supply systems.

ZN �� -12 Indoor AC High Voltage Vacuum Circuit Breaker Product Features:
The arc extinguishing chamber can be installed in ordinary insulation tubes or sealed in epoxy resin using APG technology. This circuit breaker has the characteristics of small size, beautiful appearance, reliable performance, and high mechanical life.

[Indoor vacuum circuit breaker]ZN65A-12 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:39:28

The ZN65A-12 vacuum circuit breaker is a new generation vacuum circuit breaker developed and researched based on the latest technology at home and abroad. The circuit breaker has a simple structure, stable operation, reliability, and easy maintenance. The operating mechanism is a spring energy storage type, which meets the technical and mechanical characteristic parameters of various vacuum arc extinguishing chambers at home and abroad.

This circuit breaker can be used not only for general protection equipment in power plants and transmission and distribution systems, but also for control and protection of small generator exports, electric furnace steelmaking and other equipment. Its performance is at the leading level in China, reaching the highest level of similar products in the late 1990s.

ZN65A-12 series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]BVS1-12 series vacuum circuit breaker

2026-6-10 19:39:20

The BVS1-12 series vacuum circuit breaker is a type of circuit breaker specifically designed for use with GZS1 central cabinets. It is an indoor high-voltage distribution device with a three-phase AC frequency of 50Hz and a rated voltage of 12kV or below. Can be matched with KYN28A-12 (GZS1) switchgear. Suitable for control and protection of transmission and distribution systems such as power plants and substations, especially in places with frequent operations.

The operating mechanism of BVS1-12 series vacuum circuit breaker is spring energy storage type, which can be operated by AC or DC, or manually operated.

[Indoor vacuum circuit breaker]BV1-12 type vacuum circuit breaker

2026-6-10 19:39:11

BV1-12 vacuum circuit breaker is a new product developed by Shanghai Baolin Chaoya Electric Co., Ltd. according to market requirements. Its prominent feature is the organic combination of ZN65A-12 vacuum circuit breaker and ZN63A-12 vacuum circuit breaker. Through a unique structural design, the operating mechanism performance of Siemens 3AH is integrated with ABB's VD4 body structure, which is suitable for the needs of the Chinese market. The operating life is designed to be 30000 times, making it an alternative product to VD4. At the same time, it can be interchanged with domestic VS1 (ZN63A-12) vacuum circuit breaker. It can be used as a fixed installation unit or as a mid mounted circuit breaker to match KYN28A (GZS1) switchgear.

BV1-12 vacuum circuit breaker is an indoor switchgear used in 12kV power systems. As a protection and control unit for power equipment in industrial and mining enterprises, the circuit breaker is simple, stable and reliable in operation, and easy to maintain; Large climbing distance, strong anti fouling ability, sufficient insulation strength, suitable for use in high-altitude areas.

[Indoor vacuum circuit breaker]ZN22B-12/1250-31.5 Indoor High Voltage Vacuum Circuit Breaker

2026-6-10 19:39:02

Overview
The ZN22B-12/1250-31.5 vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 12kV and three-phase AC 50Hz. This circuit breaker is designed with reference to the most advanced vacuum switch technology abroad, using a new and reliable spring energy storage control mechanism, combined with a domestically produced first-class "central arc ignition" and longitudinal magnetic field structure vacuum arc extinguishing chamber. The product is increasingly valued and welcomed by the market for its superior vacuum switch function and low sales price. Siemens VS12040PR and VS17005PR vacuum arc extinguishing chambers can also be used to improve the technical performance of the products.

Scope of application
This circuit breaker has a simple structure, high technical parameters, strong breaking capacity, complete operating functions, reliable action, stable performance, long service life, easy maintenance, and no explosion hazard or pollution. It is suitable for use as a control or protection switch and opening and closing container group in power plants, substations and other transmission and distribution systems, especially for breaking important loads and frequent operations.

Main technical parameters of ZN22B-12/1250-31.5 indoor high-voltage vacuum circuit breaker

program	name	parameter	unit	program	name	parameter	unit
one	rated voltage	twelve	kV	thirteen	mechanical life	ten thousand	time
two	rated current	one thousand two hundred and fifty	A	fourteen	Rated current breaking times	ten thousand	time
three	Rated short-circuit breaking current	thirty-one point five	kA	fifteen	Rated power of energy storage motor	two hundred and seventy-five	W
four	Dynamic stability current (peak value)	eighty	kA	sixteen	Rated voltage of energy storage motor	110��220	V
five	Thermal stability current (4s)	thirty-one point five	kA	seventeen	Energy storage time	��15	A
six	Rated short-circuit closing current (peak)	eighty	kA	eighteen	Rated voltage of closing electromagnet	110��220	V
seven	Rated short-circuit current breaking times	thirty	time	nineteen	Rated voltage of the opening electromagnet	110��220	V
eight	Rated operating sequence	Fen-0.3S-180S-Fen		twenty	Rated voltage of closing interlock device	110��220	V
nine	Rated lightning impulse withstand voltage (full wave)	seventy-five	kV	twenty-one	Rated voltage of voltage loss release device	110��220	V
ten	Rated short-time power frequency withstand voltage (1 minute)	forty-two	kV	twenty-two	Rated current of overcurrent release device	five	A
eleven	closing time	��0.075	S	twenty-three	Rated current of auxiliary switch	AC10��DC5	A
twelve	Opening time	��0.065	S	twenty-four	weight	��120	kg

ZN22B-12/1250-31.5 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:38:53

The VBI-12 indoor high-voltage vacuum circuit breaker has a complete solution and specifications, and is a new type of operation
Dynamic mechanism, simple and reliable. This model of circuit breaker has the following solutions:
1. There is a fully interchangeable solution with VSI.
2. One circuit is a fixed sealed pole (optional 650mm wide or 800mm wide cabinet) solution.
3. One time, the circuit did not adopt a fixed sealed pole and the phase spacing was 150mm (with a 650mm wide cabinet), which was more economical and practical.

Exterior installation dimensions:

VBI-12 Indoor High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN28-12C series indoor high-voltage vacuum circuit breaker

2026-6-10 19:38:45

1. Overview
The ZN28-12C indoor high-voltage handcart vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz indoor device equipped with a DC electromagnetic operating mechanism or spring operating mechanism. It is used as a circuit breaker for KYN1-12 and JYN2-12 indoor AC metal withdrawable switchgear and is suitable for power supply and distribution systems with a rated voltage of 12kV and below. Used as control or protection switches for electrical facilities in industrial and mining enterprises, power plants, and substations, especially suitable for places with frequent operations.
2. Normal usage conditions
a) Surrounding air temperature: not exceeding 40 ��, and the average value measured within 24 hours does not exceed 35 ��; The minimum ambient air temperature is -10 ��;
b) Altitude: not exceeding 1000m;
c) The surrounding air is not significantly polluted by dust, smoke, corrosive and flammable gases, vapors, and salt spray;
d) Relative humidity: daily average not exceeding 95%, monthly average not exceeding+90%; The daily average value of water vapor pressure shall not exceed 2.2kPa, and the monthly average value shall not exceed 1.8kPa; During periods of high humidity, if the temperature drops sharply, condensation may occur;
e) Any requirements beyond the above conditions shall be agreed upon by the user and the manufacturing unit.

3. Main technical parameters of ZN28-12C series indoor high-voltage vacuum circuit breaker:

serial number	parameter name	unit	data
serial number	parameter name	unit	20kA	25kA	31.5kA
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	630, 1250	630, 1250, 1600	1250, 1600, 2000
four	Rated short-circuit breaking current	kA	twenty	twenty-five	thirty-one point five
five	Rated short-circuit breaking current breaking times	time	thirty
six	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty
seven	Rated dynamic stable current		fifty	sixty-three	eighty
eight	Rated thermal stability current		twenty	twenty-five	thirty-one point five
nine	Rated thermal stability time	s	four
ten	closing time		��0.2
eleven	Opening time		��0.06
twelve	1-minute power frequency withstand voltage	kV	forty-two
thirteen	Lightning impulse withstand voltage (peak value)	kV	seventy-five
fourteen	Rated breaking current of a single capacitor bank	A	six hundred and thirty
fifteen	Rated back-to-back capacitor bank breaking current	A	four hundred
sixteen	mechanical life	time	ten thousand
seventeen	Rated operating sequence		0-0.3s-CO-180s-0
eighteen	Equipped with operating mechanism		CY17 ��, CT19 ��		CY17 ��, CT19 ��
nineteen	Rated operating voltage of the closing and opening coils of the operating mechanism	V	CD17��DC110��DC220 CT19��AC110��AC220��AC380��DC48��DC110��DC220
twenty	Contact opening distance	mm	11±1
twenty-one	overstroke		4±1
twenty-two	Allowable cumulative thickness of contact wear		three
twenty-three	Average closing speed	ms	0.6±0.2
twenty-four	Average opening speed	m/s	1.0±0.3		1.0±0.2
twenty-five	Three synchronous closing and opening of switches	ms	��2
twenty-six	Contact closing bounce time	ms	��2
twenty-seven	Oil buffer stroke	mm	ten₀^+0.5

ZN28-12C series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN39-40.5C series indoor high-voltage vacuum circuit breaker

2026-6-10 19:38:36

1. Overview
ZN39-40.5C series vacuum circuit breaker is a three-phase AC 50Hz, rated voltage 40.5kV indoor high-voltage distribution device. Can be matched with JYN1-35/GBC-35 switchgear. Suitable for control and protection of transmission and distribution systems such as power plants and substations, especially in places with frequent operations.
The vacuum circuit breaker is a handcart type, with a reasonable structure, easy maintenance, and safe and reliable use. Equipped with CD10-II electromagnetic actuator or CT19-II spring actuator.
2. Normal usage conditions
a) Altitude: not exceeding 1000m;
b) Surrounding air temperature: maximum+40 ��, minimum -10 ��;
c) Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
d) Water vapor pressure: daily average not exceeding 2.2kPa; The monthly average value is not greater than 1.8kPa;
e) A place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration.

3. Main technical parameters of ZN39-40.5C series indoor high-voltage vacuum circuit breaker:

serial number	name	unit	data
one	rated voltage	kV	forty point five
two	rated frequency	Hz	fifty
three	Rated power frequency withstand voltage (1min)	kV	ninety-five
four	Rated lightning impulse withstand voltage (peak)	kV	one hundred and eighty-five
five	rated current	A	1250/1600
six	Rated short-circuit breaking current	kA	twenty	twenty-five
seven	Rated short-circuit closing current (peak)		fifty	sixty-three
eight	Rated short-time withstand current		twenty	twenty-five
nine	Rated peak withstand current		fifty	sixty-three
ten	Rated short-circuit duration	A	four
eleven	Rated short-circuit breaking current breaking times	time	eight
twelve	mechanical life	time	ten thousand
thirteen	closing time	ms	��100
fourteen	Opening time	ms	��60
fifteen	Dimensions (width x depth x height)	mm	1180×1414×1728
sixteen	quality	kg	five hundred

ZN39-40.5C series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN23-40.5C series car type indoor high-voltage vacuum circuit breaker

2026-6-10 19:38:27

The ZN23-40.5C series vehicle mounted high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is an indoor high-voltage electrical equipment with a rated voltage of 40.5kV and three-phase AC 50Hz. It is suitable for power transmission and distribution systems in industrial and mining enterprises, substations, etc., and serves as a control and protection switch; Especially suitable for industries such as metallurgy and arc steelmaking that require frequent operations, as control and protection equipment.

The ZN23-40.5C series car type indoor high-voltage vacuum circuit breaker meets the standard of G1984-89 "AC Vacuum Circuit Breaker".
This circuit breaker is a handcart type, with a reasonable structure, easy maintenance, and safe and reliable use. Equipped with CD10 �� electromagnetic actuator or CT19 �� spring actuator.
2. Normal usage conditions
a) Altitude: not exceeding 1000m;
b) Surrounding air temperature: upper limit+40 ��, lower limit -15 ��;
c) Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
d) Water vapor pressure: daily average not exceeding 2.2kPa, monthly average not exceeding 1.8kPa;
e) The surrounding air is not significantly polluted by dust, smoke, corrosive and flammable gases, vapors, and salt spray;
f) Places without severe vibrations;
g) Any requirements beyond the above conditions shall be agreed upon by the user and the manufacturing unit.

3. Main technical parameters of ZN23-40.5C series car type indoor high-voltage vacuum circuit breaker:

serial number	name	unit	data
one	rated voltage	kV	forty point five
two	Lightning impulse withstand voltage (peak value)		one hundred and eighty-five
three	1-minute power frequency withstand voltage		ninety-five
four	rated frequency	Hz	fifty
five	rated current	A	six hundred
six	Rated short-circuit breaking current	kA	twenty-five
seven	Rated short-circuit withstand current of 4s		twenty-five
eight	Rated peak withstand current		eighty
nine	Rated short-circuit breaking time	ms	��90
ten	Rated short-circuit closing current (peak)	kA	eighty
eleven	Rated operating sequence		0-0.3s-CO-180s-0
twelve	closing time	ms	50~85
thirteen	Opening time	ms	40~85
fourteen	Rated short-circuit breaking current breaking times	time	twenty
fifteen	mechanical life	time	twelve thousand
sixteen	Rated breaking current of capacitor bank	A	six hundred and thirty
seventeen	Rated power of energy storage motor	W	two hundred and seventy-five
eighteen	Rated voltage of energy storage motor	V	�� 220, 110
nineteen	Energy storage time	s	fifteen
twenty	Rated voltage of closing and opening electromagnet	V	�� 220, 110
twenty-one	Rated voltage for voltage loss trip	V	�� 220, 110
twenty-two	Rated current for overcurrent trip	A	five
twenty-three	Rated current of auxiliary switch	A	ten

ZN23-40.5C series car type indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN68-12(ZN12-12) series indoor high-voltage vacuum circuit breaker

2026-6-10 19:38:19

1. Overview
ZN68-12 (ZN12-12) series high-voltage vacuum circuit breaker is an indoor high-voltage distribution device with three-phase AC 50Hz and rated voltage of 12kV or below. This series of products has a simple structure, strong breaking capacity, long service life, complete operating functions, and easy maintenance. It is suitable for control and protection of power transmission and distribution systems such as power plants and substations, especially for places with frequent operations.
The operating mechanism of this series of products is spring energy storage type, which can be operated by AC or DC, or manually operated.

2. Normal usage conditions
a) Altitude: not exceeding 1000m;
b) Surrounding air temperature: maximum+40 ��, minimum -10 ��;
c) Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
d) Water vapor pressure: daily average not exceeding 2.2kPa; The monthly average value is not greater than 1.8kPa;
e) A place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration.

3. ZN68-12 (ZN12-12) series indoor high-voltage vacuum circuit breaker specifications:

rated
voltage

rated
power frequency
tolerance
voltage

rated
thunder and lightning
impact
tolerance
voltage
(Peak value)

rated
short circuit
Disconnect
current

rated
short circuit
close
current
(Peak value)

rated
short circuit
sustain
time

rated
short circuit
current
Disconnect
frequency

machine
lifespan

rated current

time

one thousand two hundred and fifty

one thousand and six hundred

two thousand

two thousand and five hundred

three thousand one hundred and fifty

four thousand

twelve

forty-two

seventy-five

twenty

fifty

four

thirty

ten thousand

��

twelve

forty-two

seventy-five

twenty-five

sixty-three

four

thirty

ten thousand

��

twelve

forty-two

seventy-five

thirty-one point five

eighty

four

thirty

ten thousand

��

twelve

forty-two

seventy-five

forty

one hundred

four

thirty

ten thousand

��

twelve

forty-two

seventy-five

fifty

one hundred and twenty-five

four

thirty

ten thousand

��

4. Main technical parameters of ZN68-12 (ZN12-12) series indoor high-voltage vacuum circuit breaker:

serial number	name	unit	data
serial number	name	unit	20kA	31.5kA	40kA
one	Rated short-circuit breaking current	kA	twenty	thirty-one point five	forty
two	Rated short-circuit closing current (peak)		fifty	eighty	one hundred
three	Rated short-time withstand current		twenty	thirty-one point five	forty
four	Rated peak withstand current		fifty	eighty	one hundred
five	Rated short-circuit duration	s	four
six	Rated short-circuit breaking current breaking times	time	thirty
seven	mechanical life	time	ten thousand
eight	closing time	ms	��75
nine	Opening time	ms	��65
ten	Single capacitor bank breaking current	A	six hundred and thirty
eleven	Back to back capacitor bank breaking current	A	four hundred
twelve	Rated voltage of energy storage motor	V	DC220��110�� AC220��110
thirteen	Closing voltage		DC220��110�� AC220��110
fourteen	Opening voltage		DC220��110�� AC220��110
fifteen	Power of opening and closing coils	W	two hundred and forty-five

ZN68-12 (ZN12-12) series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN101-12 Vacuum Circuit Breaker

2026-6-10 19:38:10

Product Features of ZN101-12 Vacuum Circuit Breaker

1. The peak withstand current reaches 100kA.
2. For this circuit breaker, all mechanical travel curves are within the envelope, and the distance from the reference mechanical travel curve does not exceed ± 2mm.
3. Mechanical lifespan: The overall mechanical lifespan of this circuit breaker reaches 60000 cycles. The mechanical characteristics before and after the lifespan meet the requirements of the new standard. The mechanical lifespan of the arc extinguishing chamber is greater than 30000 times.
4. Temperature rise test: Passed the type test at 1.1 times the rated current, which is 1375A.
5. Manual disconnection: The ZNB type permanent magnet vacuum circuit breaker developed by the factory has successfully undergone a type test of manual disconnection with a rated current of 1250A and continuous operation for 10 times at the Electric Power Research Institute. This experiment is rarely conducted in China.
6. EMC (Electromagnetic Compatibility) test: Conducted the most rigorous level of testing according to the new standards. Under various interference conditions, the electronic controller works normally, and the circuit breaker has no abnormal phenomena such as misoperation or refusal to operate.

Technical parameters of ZN101-12 vacuum circuit breaker

serial number	name		unit	parameter
one	rated voltage		kV	twelve
two	Rated insulation level	1min power frequency withstand voltage (effective value)	kV	forty-two
		Lightning impulse withstand voltage (peak value)		seventy-five
three	rated frequency		Hz	fifty
four	Interphase center distance		mm	150��170��210
five	rated current		A	one thousand two hundred and fifty
six	Rated short-circuit breaking current		kA	thirty-one point five
seven	Rated short-time withstand current			thirty-one point five
eight	Rated short-circuit closing current (peak)			one hundred
nine	Rated peak withstand current			one hundred
ten	DC component			��40%
eleven	Rated cable charging opening and closing current		A	25 (C2 level)
twelve	Rated operating sequence			Split -0.3s - Split -180s - Split - Split
thirteen	Rated short-circuit current duration		s	four
fourteen	Circuit breaker electrical life			E2 level
fifteen	mechanical life	Circuit breaker (mechanism)	time	sixty thousand
		Arc extinguishing chamber		thirty thousand
sixteen	Allowable cumulative thickness of wear for dynamic and static contacts		mm	three
seventeen	Rated current for manual emergency disconnection		A	one thousand two hundred and fifty
eighteen	EMC electromagnetic compatibility			GB/Tll022 related regulations

[Indoor vacuum circuit breaker]ZN12-40.5 series indoor vacuum circuit breaker

2026-6-10 19:38:01

The ZN12 indoor vacuum circuit breaker is suitable for 35kV three-phase AC 50Hz power systems. The arc chamber of this circuit breaker is made of ceramic structure and adopts longitudinal magnetic field contacts. It has a small volume, and the diffusion arc current generated during disconnection is uniformly distributed on the contacts, without local melting phenomenon. It also has low arc energy voltage (20-200V) and low current cutoff value (4-5A), and is equipped with a highly reliable operating mechanism.

The ZN12-40.5 series indoor vacuum circuit breaker adopts the DYT-1 spring energy storage mechanism, which can be operated by AC energy storage supporting DC or manually operated. This circuit breaker adopts special contact materials, which enable the arc extinguishing chamber to have a high breaking capacity and a long electrical life.

This circuit breaker has a simple structure, strong breaking capacity, long service life, complete operating functions without explosion hazards, and simple maintenance. It is suitable for controlling or protecting switches in power plants, substations and other distribution systems, especially for breaking important loads and frequent operation places.

Main technical parameters of ZN12-40.5 series indoor vacuum circuit breaker

serial number	project		unit	Technical Specifications
one	rated voltage		kV	forty point five
two	rated current		A	one thousand two hundred and fifty		one thousand and six hundred	two thousand
three	Rated short-circuit breaking current		kA	twenty	thirty-one point five	twenty-five	thirty-one point five
four	Dynamic stability current (peak value)		kA	fifty	eighty	sixty-three	eighty
five	4S thermal stability current		kA	twenty	thirty-one point five	twenty-five	thirty-one point five
six	Rated short-circuit closing current (peak)		kA	fifty	eighty	sixty-three	eighty
seven	Rated short-circuit current breaking times		time	twenty
eight	Rated operating sequence			0-03s-C0-180s-C0
nine	Rated Absolute Edge level	1-minute power frequency withstand voltage	kA	ninety-five
		Lightning impulse withstand voltage (peak value)		one hundred and eighty-five
ten	mechanical life		time	ten thousand
eleven	Rated opening and closing current of a single capacitor bank		A	six hundred and thirty
twelve	Rated back-to-back capacitor bank current		A	four hundred
thirteen	Rated voltage of energy storage motor		V	AC��DC��110�� two hundred and twenty
fourteen	Rated power of energy storage motor		W	two hundred and seventy-five
fifteen	Energy storage time of energy storage motor		S	��15
sixteen	Rated voltage of the closing and opening coil		V	AC��DC��110�� two hundred and twenty
seventeen	Rated current of closing and opening coil		A	1.91 (AC), 0.89 (DC)
eighteen	Rated current of overcurrent release device		A	five
nineteen	Contact opening distance		mm	25±2
twenty	Contact stroke of contacts		mm	6±2
twenty-one	Three phase separation with different phases		ms	��2
twenty-two	Contact closing bounce time		ms	��3

ZN12-40.5 series indoor vacuum circuit breaker appearance and installation dimensions

	L	L1	L2
ZN72-40.5	three hundred and fifty	eight hundred	eight hundred and thirty
ZN-40.5	four hundred and sixty	one thousand one hundred and twenty-eight	one thousand one hundred and seventy-five

ZN12-40.5 series indoor vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN12-12(40.5) High Voltage Vacuum Circuit Breaker

2026-6-10 19:37:52

1.1 ZN12-12 and ZN12-40.5 high-voltage vacuum circuit breakers are indoor high-voltage switchgear with rated voltages of 12KV and 40.5KV, three-phase AC 50Hz, respectively. They are integrated vacuum circuit breakers manufactured with advanced foreign technology.

The operating mechanism of ZN12-12 (40.5) high-voltage vacuum circuit breaker is spring energy storage type, which can be operated by AC or DC. It can also be manually operated.

1.2 This circuit breaker has a simple structure. Strong breaking ability, long service life, complete operating functions, no explosion hazard, easy maintenance, suitable for control or protection switches in power plants, substations and other transmission and distribution systems, especially suitable for breaking important loads and places with frequent operations.

1.3 Environmental conditions for use:

Altitude: Below 1000m (if the altitude exceeds 1000m, follow the relevant provisions of DL/T593-1996 "Technical Guidelines for Shared Ordering of High Voltage Switchgear").
Environmental temperature: maximum+40 ��, minimum -25 ��
Environmental humidity: daily average not exceeding 95%, monthly average not exceeding 90%
Seismic intensity: below 8 degrees

1.4 Outline drawing: Refer to Figure 1 and Figure 2.
Figure 1 Outline drawing of ZN12-12

Figure 2 Outline drawing of ZN12-40.5

2.1 Implementation standards: GB1984-89 "AC High Voltage Circuit Breakers", JB3855-85 "General Technical Conditions for 10kV Indoor High Voltage Vacuum Circuit Breakers", ZBK43004-89 "General Technical Conditions for 35kV Indoor High Voltage Vacuum Circuit Breakers".

2.2 ZN12-12 (40.5) High Voltage Vacuum Circuit Breaker Model Meaning

A place without fire or explosion hazards, corrosive gases, and severe vibrations.

[Indoor vacuum circuit breaker]VS1-24 Indoor AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:37:44

The VS1-24 indoor AC high-voltage vacuum circuit breaker is an integral fully enclosed, small in size, and compact in structure high-voltage switchgear. It is suitable for use in power systems with three-phase AC 50Hz and rated voltage of 12kV, as a control and protection device for lines and electrical equipment. And it can be used in places with frequent operations.
Product features: 1 Integrated structure.
2. Enclosed installation of arc extinguishing chamber.
3. High performance vacuum arc extinguishing.
4. Good mechanical properties.
5. Flexible and diverse installation forms.

VS1-24 Indoor AC High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN65-12 Indoor AC High Voltage Vacuum Circuit Breaker

2026-6-10 19:37:35

The ZN65-12 indoor high-voltage vacuum circuit breaker is an important component in power distribution lines, responsible for functions such as connecting, cutting off, and fault protection of line power. This circuit breaker can be used in power systems with three-phase AC 50Hz and rated voltage of 12kV and below. It can be used for controlling and protecting electrical equipment in industrial and mining enterprises, power plants, and substations, and is suitable for frequent operation in places.

[Indoor vacuum circuit breaker]VS1-12 Indoor mounted high-voltage vacuum circuit breaker

2026-6-10 19:37:25

VS1-12 indoor mounted high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]Indoor solid sealed high-voltage vacuum circuit breaker

2026-6-10 19:37:17

VS1 Indoor Sealed High Voltage Vacuum Circuit Breaker

[Indoor vacuum circuit breaker]ZN63A(VS1)-12 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:37:08

I. Overview
The ZN63A (VS1) indoor high-voltage vacuum circuit breaker is a three-phase AC 50HZ indoor high-voltage switchgear with a rated voltage of 7.2~kV. The circuit breaker complies with China's national standards GB1984-89 "AC High Voltage Circuit Breaker", GB3855-1996 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breaker", DL403-01 "10-35kV Indoor High Voltage Vacuum Circuit Breaker Ordering Technical Conditions" and relevant IEC standards, and has reliable interlocking function.
The ZN63A (VS1) indoor high-voltage vacuum circuit breaker can perform frequent operations and has the ability to open and close multiple times and quickly reclose.
The ZN63A (VS1) indoor high-voltage vacuum circuit breaker is designed with a front and rear split structure, which can be used as a fixed installation unit or as a separate handcart with the chassis.

2�� Environmental conditions for use
1. Surrounding air temperature:+40 �� to -15 �� (daily average not exceeding -35 ��);
2. Altitude not exceeding 1000 meters;
3. The monthly average relative humidity of the air shall not exceed 90%, and the daily average shall not exceed 95%;
4. The seismic intensity shall not exceed 8 degrees;
5. The place of use is free from flammable, explosive hazards, chemical corrosion, and severe vibration.

3�� ZN63A (VS1) -12 series indoor high-voltage vacuum circuit breaker model and significance

4�� Ordering Notice
Users should indicate when placing an order:
1. Circuit breaker model, name, and order quantity;
2. Rated voltage, rated current, and rated short-circuit breaking current of the circuit breaker.
3. Rated operating voltage;
4. Names and quantities of spare parts and components;
5. If the user has any other special requirements, they can specify them when placing an order.

5�� Main technical parameters of ZN63A (VS1) -12 series indoor high-voltage vacuum circuit breaker

Rated voltage kV			twelve
Rated frequency Hz			fifty
Rated insulation level	1-minute power frequency withstand voltage Phase to phase, relative to ground/isolated fracture kV		42/48 (valid value)
	Lightning impulse tolerance Phase to phase, relative to ground/isolated fracture kV		75/85 (peak)
Rated operating sequence			Fen-F combined Fen-F1 combined Fen*
Main circuit resistance ��			��40
Mechanical lifespan times			one thousand
model	Rated current A	Rated short-circuit breaking current kA	Rated short-circuit closing current (peak) kA	rated short-circuit Duration S	Rated short-circuit breaking Current interruption times (times)
ZN��-12/630-20	six hundred and thirty	20/25	50/63	four	one hundred
ZN��-12/1250-20	one thousand two hundred and fifty
ZN��-12/1250-31.5	one thousand two hundred and fifty	thirty-one point five	eighty		fifty
ZN��-12/1600-31.5	one thousand and six hundred
ZN��-12/2000-31.5	two thousand
ZN��-12/2500-31.5	two thousand and five hundred
ZN��-12/1250-31.5	one thousand two hundred and fifty	<>	one hundred		thirty
ZN��-12/1250-40	one thousand and six hundred
ZN��-12/1600-40	two thousand
ZN��-12/2000-40	two thousand and five hundred
ZN��-12/2500-40	three thousand one hundred and fifty
Note: When the short-circuit breaking current is 20, 25, and 31.5kA, f=0.3s, f1=180s Short circuit breaking current 40kA, f=0.180s, f1=180s

ZN63-12/1250-31.5 (800mm) Appearance and installation dimensions (210mm apart)

Internal electrical schematic diagram of circuit breaker

ZN63A (VS1) -12 series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN23-40.5 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:36:59

ZN23-40.5 series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]ZN85-40.5 series indoor high-voltage vacuum circuit breaker

2026-6-10 19:36:50

The ZN85-40.5 series indoor high-voltage vacuum circuit breaker is suitable for use in three-phase AC 50HZ \ 40.5KV systems, and can be used for load current, overload current, and fault current in industrial and mining enterprises, power plants, and substations. It is also suitable for frequent operation.

ZN85-40.5/1600-25
ZN85-40.5/200-31.5

project	unit	parameter
rated voltage	KV	forty point five
1-minute power frequency withstand voltage (effective value)	KV	ninety-five
Lightning impulse withstand (peak value)	KV	one hundred and eighty-five
rated frequency	HZ	fifty
rated current	A	1600 2000
Rated short-time withstand current	KA	thirty-one point five
Rated peak withstand current	KA	eighty
Rated short-time duration	S	four
Rated short-circuit breaking current	KA	thirty-one point five
Rated short-circuit closing current	KA	eighty
Rated operating sequence		o-03.s-co-180s-co
Cut off time	MS	<80
Rated short-circuit breaking current breaking times	time	twenty
Single capacitor bank breaking current	A	six hundred and thirty
Back to back capacitor bank breaking current	A	four hundred
Rated operating voltage	V	��110 ��220
mechanical life	time	ten thousand

ZN85-40.5 series indoor high-voltage vacuum circuit breaker

[Indoor vacuum circuit breaker]Indoor high-voltage switch vacuum circuit breaker

2026-6-10 19:36:42

The ZN21-12 indoor high-voltage vacuum circuit breaker is a product with international advanced level manufactured by introducing advanced foreign technology. This product not only has high mechanical reliability, long electrical life, and strong breaking ability, but also has a small size and light weight, making it a high-performance non maintenance circuit breaker that can replace imported ones.

The product structure is simple and compact, with complete operating functions. Its operating mechanism is a spring energy storage type, which can be operated by AC or DC or manually. It also has anti bounce protection and can be installed with voltage loss and overcurrent release devices. Compared with previous switches, it is smaller in size and lighter in weight. The operating mechanism and electrical components are integrated into a single structure, which not only makes the structure of the switch more compact, but also makes the switch work more reliably. This circuit breaker can be installed on a fixed frame to become a fixed switch, or installed in the frame to become a handcart switch. Regardless of the installation method, it does not affect the mechanical and electrical performance of the circuit breaker.

The ZN21-12 indoor high-voltage switch vacuum circuit breaker is particularly suitable for use with a mid mounted switchgear to replace imported circuit breakers due to its small size. It can also be installed in a double-layer mid mounted switchgear, making it smaller in size and occupying less space. The primary part of the circuit breaker is installed on a three-phase integrated insulation frame, and the vacuum arc extinguishing chambers of each phase are fixed in U-shaped slots. It not only has high mechanical strength and can overcome the electric force generated by short-circuit current, but also improves the composite insulation strength between phases. The insulation frame made of new high-strength, high flame retardant, unsaturated polyester SMC can effectively prevent the expansion of an accident and avoid the impact of an accident on the operating mechanism and secondary parts. Due to the adoption of reliability design, the mechanical and electrical reliability of the product has been improved, and it does not require maintenance for 20 years under normal usage conditions. In special circumstances, when the short-circuit current of the circuit breaker reaches the specified number of times, it only needs to replace the vacuum arc extinguishing chamber to be reused, and its performance is restored to its original state. There are multiple product specifications and a wide range of varieties, from small currents with large quantities and wide coverage to high currents with special requirements, fully meeting the various needs of users. This product is a 12KV three-phase AC 50Hz high-voltage switchgear, suitable for control or protection of power transmission and distribution systems such as power plants and substations, especially for important loads and frequent operations in chemical, metallurgical, mining and other places.

The ZN21-12 indoor high-voltage vacuum circuit breaker complies with the requirements of GB 1984 "AC High Voltage Circuit Breakers", JB 3855 "3.6-40.5KV Indoor High Voltage Vacuum Circuit Breakers", DL/T 402 "Technical Conditions for Ordering AC High Voltage Circuit Breakers", and relevant requirements of IEC 56.

[Indoor vacuum circuit breaker]Indoor high-voltage vacuum circuit breaker

2026-6-10 19:36:33

The ZN66-12 series reinforced insulation indoor high-voltage vacuum circuit breaker is jointly designed by two departments (the Ministry of Electric Power and the Ministry of Machinery), and is a new generation 12KV series vacuum circuit breaker with leading level among similar products in China. This product not only meets the requirements of GB1984 "AC High Voltage Circuit Breakers" and DL402 "Technical Conditions for Ordering AC High Voltage Circuit Breakers", but also complies with the requirements of DL403 "Technical Conditions for Ordering 10-30KV Indoor High Voltage Vacuum Circuit Breakers". This series of vacuum circuit breakers is an indoor device with a rated voltage of 12KV and a three-phase AC frequency of 50Hz. They are installed in various switch cabinets for the protection and control of electrical facilities in industrial and mining enterprises, power plants, and substations. They are also suitable for places with condensation, mild pollution, and frequent operation.

[Indoor vacuum circuit breaker]RMVS1 series high-voltage vacuum circuit breaker

2026-6-10 19:36:24

RMVS1 (ZN63A) vacuum circuit breaker is an indoor high-voltage switchgear. Under normal operating conditions, as long as it is within the technical parameters of the circuit breaker, it can ensure safe and reliable operation in the corresponding voltage level of the power grid. This product can perform frequent operations or break short-circuit currents multiple times within the working current range; The mechanical lifespan can reach up to 20000 times, and the full capacity short-circuit current can be broken up to 50 times. It is suitable for reclosing operation and has extremely high operational reliability and lifespan. Its installation form inside the switchgear can be either fixed, withdrawable, or installed on a frame for use.

Technical data and performance of RMVS1 series high-voltage vacuum circuit breaker:

project	unit	numerical value
rated voltage	kV	twelve
Rated insulation level	1-minute power frequency withstand voltage	kV	42 (fracture 48)
	Lightning impulse withstand voltage (peak value)	kV	75 (fracture 85)
rated frequency		Hz	fifty
rated current		A	630,1250	630,1250,1600,2000,2500,3150	1600,2000,2500,3150,4000	4000��5000
Rated short-circuit breaking current (effective value)		kA	twenty-five	thirty-one point five	forty	fifty
Rated peak withstand current		kA	sixty-three	eighty	one hundred	one hundred and twenty-five
Rated short-circuit closing current		kA	sixty-three	eighty	one hundred	one hundred and twenty-five
Rated short-time withstand current		kA	twenty-five	thirty-one point five	forty	fifty
Rated short-circuit duration		s	four
Rated breaking current of single/back-to-back capacitor bank		A	630/400 (800/400 for 40~50kA)
Rated capacitor bank closing inrush current		kA	12.5 (frequency not exceeding 1000Hz)
Rated opening and closing cable charging current		A	twenty-five
Rated operating sequence	Automatic reclosing (25~31.5kA)	-	Min-0.3s HeFen-180s HeFen
	Non automatic reclosing (40~50kA)	-	Split -180s - Split -180s - Split
Rated operating voltage of operating mechanism		V	AC��110,220�� DC��110,220
closing time		ms	30~70
Opening time			20~50
arcing time			��15
Classification of mechanical lifespan		-	M2 level 20000 times (40~50kA for M1 level 10000 times)
Classification of electrical lifespan		-	E2 level
Classification of the ability to open and close capacitive currents		-	C2 level
Center distance between phases ��	Rated current �� 2000A	mm	210±0.5
	Rated current �� 2000A		275±0.5
Contact closing bounce time	Rated current �� 2000A	ms	��2
	Rated current �� 2000A		��3
Three phase on-off asynchrony			��2
Allowable cumulative thickness of wear for dynamic and static contacts		mm	three
Contact opening distance			11±1
overstroke			3±0.5
Average closing speed		m/s	0.5~0.8
Average opening speed			0.9~1.2
loop resistance	630A	�̦�	��50
	1250A		��45
	1600~2000A		��35
	2500~3150A		��25
	4000~5000A		��18

Note ��: When the rated current is 1600A and the breaking current is 31.5kA, a distance of 210 or 275 is optional; When the rated current is 1600A and the breaking current is 40.5kA, the distance is 275.

[Indoor vacuum circuit breaker]ZN28 series high-voltage vacuum circuit breaker

2026-6-10 19:36:15

The ZN28-12 series vacuum circuit breaker is a high-voltage indoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz. It is a product manufactured by our factory with technology introduced from Xi'an High Voltage Apparatus Research Institute.

The ZN28 series high-voltage vacuum circuit breaker complies with the GB1984-89 standard and is currently a substitute product for domestically produced ZN3, ZN4, and ZN5B.

The ZN28-12 series vacuum circuit breaker is a miniaturized structure with the characteristics of small size, large breaking capacity, long service life, no explosion hazard, simple maintenance, and low cost. It is suitable for protection and control in industrial and mining enterprises, power plants, and substations, especially in places with frequent operations such as switching capacitor banks, controlling electric furnace transformers, and high-voltage motors. The overall structure of this product is divided into two forms: integrated installation of switch body and operating mechanism, and separate installation of switch body and operating mechanism. The integrated structure is the basic type of ZN28-12, suitable for various mid mounted fixed switchgear, such as OGXZ-12. There are two types of split structure: ZN28A-12 type, suitable for various fixed switchgear, such as GG-1A, XGNZ-12 and ZN28C-12 type; Suitable for various floor standing handcart style switchgear, such as JYNZ-12, KYNI-12, etc.
This product can be equipped with CD17, CD10 DC electromagnetic operating mechanisms and CT8, CTI7, CT19 spring energy storage operating mechanisms.

Model and its meaning

Overview

Technical Specifications

Outline drawing

Main technical parameters of circuit breaker

serial number	name	unit	data
serial number	name	unit	ZN28.12/1250.20	1250 ZN28-12/1600.31.5 two thousand	two thousand ZN28-12/2500-40 three thousand one hundred and fifty
one	rated voltage	KV	twelve
two	maximum voltage	KV	twelve
three	rated current	A	one thousand two hundred and fifty	1250 1600 2000	2000 2500 3150
four	Rated short-circuit breaking current	KA	twenty	thirty-one point five	forty

Dimensions of ZN28-12 series circuit breaker (mm)

five	Rated short-circuit closing current (peak)	KA	fifty	80I100
six	Rated dynamic stability current (peak value)	KA	fifty	80I100
seven	Rated stable current (effective value)	KA	twenty	31.5 40
eight	Rated thermal stability time	S	four
nine	Rated short-circuit breaking current breaking times	time	30(50)	thirty
ten	Total breaking time	ms	��100
eleven	Rated operating sequence		Split -0.3s split -180s split	Split -180s Split -180s Split
twelve	One minute power frequency withstand voltage (effective value)	KV	forty-two
thirteen	Lightning impulse withstand voltage	KV	seventy-five
fourteen	mechanical life	time	ten thousand
fifteen	Rated breaking current of a single capacitor bank	A	six hundred and thirty
sixteen	Rated back-to-back capacitor bank breaking current	A	four hundred

ZN28 series high-voltage vacuum circuit breaker

ZN28-12/1250--20	seven hundred and thirty-one	six hundred and seventy-eight	five hundred and seventy-two	six hundred and eighteen	twenty-three	two hundred and seventy-five	two hundred and sixty-three	six hundred	two hundred and thirty
1250 ZN28-1 -2/1600-31.5 2000	seven hundred and ninety	seven hundred and thirty	five hundred and twenty-seven	six hundred and eighteen	twenty-three	31 6	two hundred and twenty-seven	six hundred and forty	two hundred and fifty
ZN28-12/2000-40	seven hundred and ninety	seven hundred and thirty	five hundred and seventy-seven	six hundred and twenty-three	twenty-three	three hundred and sixteen	two hundred and twenty-seven	six hundred and forty	two hundred and fifty
ZN28-12/3150-40	eight hundred and forty-two	seven hundred and ninety-two	six hundred and six	six hundred and fifty-two	twelve	three hundred and forty-two	two hundred and twenty-seven	six hundred and ninety	two