Shanghai Huabang Industrial Business Network - DC circuit breaker

[DC circuit breaker]CM3DC series DC circuit breaker

2026-6-10 10:48:54

The CM3DC series DC circuit breaker has four housing frames of 100A, 250A, 400A, and 630A, with currents ranging from 10A to 630A.

Shell level rated current I_nm(A)		one hundred		two hundred and fifty		four hundred		six hundred and thirty		eight hundred
model		CM3DC-100		CM3DC-250		CM3DC-400		CM3DC-630		CM3DC-800
Number of series poles		three	four	three	four	three	four	three	four	three	four
Rated current I_n(A)		10/16/20/25/32/ 40/50/63/80/100		16/20/25/32/40/50/63/ 80/100/125/140/160/ 180/200/225/250		225/250/315/350/400		400/500/630		630/700/800
Rated insulation voltage U_i(V)		one thousand		one thousand		one thousand		one thousand		one thousand
Rated impulse withstand voltage U_imp(V)		eight thousand		eight thousand		eight thousand		eight thousand		eight thousand
Rated working voltage U_e(V)		DC500 DC750	DC750 DC1000	DC500 DC750	DC750 DC1000	DC500 DC750	DC750 DC1000	DC500 DC750	DC750 DC1000	DC500 DC750	DC750 DC1000
Flying arc distance (mm)		��50		��50		��100		��100		��100
Rated ultimate short-circuit breaking capacity I_cu(kA)	DC500V	fifteen		sixty-five		sixty-five		sixty-five		sixty-five
	DC750V	five	fifteen	forty	fifty	forty	fifty	forty	fifty	forty	fifty
	DC1000V		five		forty		forty		forty		forty
Rated operating short-circuit breaking capacity I_cs(kA)	DC500V	100%I_cu		100%I_cu		100%I_cu		100%I_cu		100%I_cu
	DC750V	100%I_cu	100%I_cu	50%I_cu	100%I_cu	50%I_cu	100%I_cu	50%I_cu	100%I_cu	50%I_cu	100%I_cu
	DC1000V		100%I_cu		50%I_cu		50%I_cu		50%I_cu		50%I_cu
Rated short-circuit connection capacity I_cm(kA)		100%I_cu		100%I_cu		100%I_cu		100%I_cu		100%I_cu
Usage category		A		A		A		A		A
Electrical lifespan (times)¹⁾		five thousand		five thousand		one thousand		one thousand		five hundred
Mechanical lifespan (times)¹⁾	maintenance-free	ten thousand		ten thousand		five thousand		five thousand		three thousand
	There is maintenance	twenty thousand		twenty thousand		ten thousand		ten thousand		six thousand
Overall dimensions (�L)	Width (3 poles/4 poles)	75/100		107/142		150/198		182/240		210/280
	long	one hundred and thirty		one hundred and sixty-five		two hundred and fifty-seven		two hundred and seventy		two hundred and eighty
	tall	sixty		one hundred and three		one hundred and six point five		one hundred and ten		one hundred and fifteen point five
Note: 1) According to GB14048.1, the term "lifespan" refers to the probability of the number of operational cycles completed by an electrical appliance before repairing or replacing a component.

CM3DC series DC circuit breaker

[DC circuit breaker]SH6C series quick closing automatic switch

2026-6-10 10:48:45

SH8C-1000V, 2500A quick closing automatic switch

Purpose and conditions of use
Suitable for rated voltage DC1000V and below, rated current 2500A and below. When there is a fault in the power system, the main bypass protection is for overcurrent in the AC/DC hybrid transmission grid. When the DC transmission operates on a single pole ground, the ground pole current flows into the AC system through the neutral point of the transformer, causing varying degrees of impact on the AC transmission system. This switch can effectively suppress the DC current at the neutral point of the transformer, ensuring the safe and stable operation of the transformer and AC system.

Normal usage conditions
Altitude not exceeding 2000m
The ambient air temperature is between -5 �� and+40 ��.
Atmospheric conditions: The average maximum relative humidity of the wettest month is not greater than 90%, and the average minimum temperature of that month is 25 ��.
The pollution level of the switch is PD3 in a medium without explosive hazards and without gases and dust (including conductive dust) that can corrode metals and damage insulation.
The inclination of the corresponding horizontal plane during installation shall not exceed 5 ��.

SH6C series fast closing automatic switch technical parameters

eye	model
	SH8C-2500/1000	SH8C-1600/1000
Rated voltage (V)	one thousand
Rated current (A)	two thousand and five hundred	one thousand and six hundred
Main circuit withstand voltage (V)	four thousand and two hundred
Current connection capability (KA. 300ms)	forty	thirty
Mechanical lifespan (times)	ten thousand
Main contact opening distance (mm)	6~8
Main contact pressure (N)	180±20N
Main contact closing time (ms)	<20
Auxiliary contact point	4a4b

[DC circuit breaker]QDS28-S DC air circuit breaker

2026-6-10 10:48:37

QDS28-S DC air circuit breaker

1. QDS DC air circuit breaker
2. �� - Design Number
3. �� - Rated working current
4. �� - Operation method (S-manual operation)
5. X-Product installation of protective box shell
6. �� - Rated working voltage (KV)

Structural characteristics of QDS28-S DC air circuit breaker:
1. Base and bracket: made of thermosetting engineering plastic compression, serving as mechanical support and electrical insulation, with excellent insulation performance;
2. Operating mechanism: composed of a rotating shaft, energy storage spring, transmission components, and mechanical lock buckle, the circuit is manually closed and locked through an operating handle. When overcurrent occurs, the transmission mechanism can be automatically disconnected through a trip, and under normal circumstances, manual quick disconnection can be achieved through the operating handle;
3. Dynamic and static contacts: Silver alloy contacts using DC contactors have characteristics such as resistance to welding and wear. The static contacts are connected to the arc blowing coil, while the dynamic contacts are connected to the lead out terminal through soft connections;
4. Arc extinguishing cover: composed of a maze type ceramic arc extinguishing chamber, large and small arc ignition angles, and an arc resistant plastic shell, it has excellent arc extinguishing effect and short arc spraying distance when the circuit breaker is disconnected;
5. Magnetic blowing coil: wound with silver plated flat copper wire, with a movable iron core at the center, which not only generates electromagnetic force for overcurrent tripping, but also provides a blowing magnetic field for the arc extinguishing chamber through a magnetic plate;
6. Tripping current adjustment mechanism: composed of components such as a crank, tension spring, indicator, locking screw, etc. The tripping current value can be adjusted by adjusting the screw, with clear scale indication and can be locked to prevent loosening;
7. Auxiliary contact: It has a pair of normally open and normally closed pure silver contacts, which can slide laterally at the moment of connection to ensure good contact;
8. Operating handle: With insulation protection function, it can be separated from the circuit breaker body and is a specialized operating tool.

Normal working and installation conditions:
1. The altitude shall not exceed 2500 meters;
2. The highest temperature of the surrounding air is+50 ��, and the lowest is -40 ��;
3. The maximum relative humidity of the surrounding air shall not exceed 90%;
4. Vibration intensity: For sinusoidal vibrations in any direction of longitudinal, transverse, or vertical, the amplitude shall not exceed A, and the value of A shall be determined by the following formula:
A=25/f, frequency f=1-10Hz
A=250/f2, frequency f=10-50Hz
5. In environments without explosion hazards, corrosive gases, and conductive dust.

Main technical parameters:

QDS28-S DC air circuit breaker

[DC circuit breaker]QDS28-160DS DC air circuit breaker

2026-6-10 10:48:29

QDS28-160DS DC air circuit breaker

[DC circuit breaker]CW3DC DC universal circuit breaker

2026-6-10 10:48:20

The CW3DC DC universal circuit breaker (hereinafter referred to as the circuit breaker) maintains the same external dimensions and installation dimensions as the CW3. It is mainly installed in low-voltage DC distribution circuits to connect and disconnect the main circuit, and can also serve as an isolation device. Its symbol is "".
Rated current 800A~2500A;
Rated working voltage DC1000V and below;
Having a three pole string and a four pole string;
Drawer style and fixed style;
The product meets the following standards:
IEC60947-1 and GB14048.1 General Principles for Low Voltage Switchgear and Control Equipment
IEC60947-2 and GB14048.2 Low voltage switchgear and control equipment Circuit breakers
The product has obtained the national mandatory product certification CCC mark

2. Normal working conditions and installation conditions
The ambient air temperature is between -5 �� and+40 ��, and the average value over 24 hours does not exceed+35 ��;
The altitude of the installation site shall not exceed 2000m;
The relative humidity of the air at the installation site shall not exceed 50% at a maximum temperature of+40 ��; At lower temperatures, there can be higher relative humidity, with the monthly average lowest temperature of the wettest month not exceeding+25 ��, and the monthly average maximum relative humidity of that month not exceeding 90%, taking into account condensation on the surface of the product due to temperature changes;
The pollution level is level 3;
The installation category of the main circuit is IV, and the installation category of the other auxiliary circuits and control circuits is III;

The CW3DC DC universal circuit breaker should be installed according to the instructions in the user manual. Its vertical inclination does not exceed 5 °.

Model number					CW3DC-2500
Shell level rated current I_nm(A)					two thousand and five hundred
Rated current I_n(A)					800, 1000, 1250, 1600, 2000, 2500
Rated working voltage U_e(V)					DC 500/750		DC 750/1000
Rated insulation voltage U_i(V)					one thousand two hundred and fifty
Rated impulse withstand voltage U_imp(kV)					twelve
Number of series poles					Three pole string		Quadrupole string
Rated ultimate short-circuit breaking capacity Icu (kA)					forty
Rated operating short-circuit breaking capacity Ics (kA)					forty
Rated short-circuit making capacity Icm (kA)					100%Icu
Rated short-time withstand current Icw (kA)/1s					forty
Usage category					B
Opening time (without additional delay) (ms)					30~40
Closing time (ms)					Maximum 70
Electrical lifespan (times)					seven thousand
Mechanical lifespan (times)			maintenance-free		twelve thousand and five hundred
			There is maintenance		twenty-five thousand
Overall dimensions (mm)					W	H		L
	drawer-type	Horizontal connection (rear)		Three pole string	three hundred and forty-seven	four hundred and thirty-eight		three hundred and ninety-five
				Quadrupole string	four hundred and forty-two	four hundred and thirty-eight		three hundred and ninety-five
		Vertical connection (rear)		Three pole string	three hundred and forty-seven	four hundred and thirty-eight		three hundred and ninety-five
				Quadrupole string	four hundred and forty-two	four hundred and thirty-eight		three hundred and ninety-five
	fixed type	Horizontal connection (rear)		Three pole string	three hundred and sixty-two	three hundred and ninety-five		two hundred and ninety
				Quadrupole string	four hundred and fifty-seven	three hundred and ninety-five		two hundred and ninety

CW3DC DC universal circuit breaker

[DC circuit breaker]GM5-63 Small DC Circuit Breaker

2026-6-10 10:48:12

Scope of application
The GM5-63 small DC circuit breaker adopts a special arc extinguishing and current limiting system, which can quickly break the fault current of the DC distribution system, greatly improving the level difference coordination. This series has excellent performance and can avoid the occurrence of accidents such as over level tripping between the measurement and protection screen and the distribution screen in the DC system of power engineering. The differential matching characteristics of this series of products are the best among similar products at home and abroad.

The GM5-63 series small DC circuit breaker complies with GB10963.2-2003 "Overcurrent Protection Circuit Breakers for Household and Similar Places Part 2: Circuit Breakers for AC and DC", and is suitable for single pole rated DC voltage not exceeding 220V, two pole rated DC voltage not exceeding 440V, rated current 1-63A, and rated insulation voltage 500V lines. It is used for overcurrent protection of buildings and similar places' line facilities, and can also be used for infrequent on-off operations. This circuit breaker has the characteristics of small size, high breaking capacity, short arcing distance, fast closing, and easy installation. This product is suitable for non professionals to use and does not require maintenance.

Technical Specifications

[DC circuit breaker]GM5B-32 Three stage protection small DC circuit breaker

2026-6-10 10:48:04

Scope of application
The GM5B-32 three-stage protection small DC circuit breaker applies advanced electronic delay control technology, fault current sampling components, and a series of proprietary technologies from our factory, which make the short delay action performance independent of the power supply voltage. At rated current, the electronic control circuit has almost no voltage, achieving the goal of small volume, precise delay protection, high product service life and reliability for power protection system requirements, and comprehensively improving the guarantee ability of DC power supply.

The GM5B-32 three-stage protection small DC circuit breaker is the core project independently developed by our factory as a new product. It is a major technological breakthrough in the field of DC distribution protection. In addition to its outstanding advantages such as precise and reliable delay protection function, it also has the smallest volume compared to the previous year (GMB32 width is 72mm). While effectively reducing the space occupied by distribution appliances, it will also greatly improve the protection level of the DC power system.

The successful development of GM5B-32 three-stage protection small DC circuit breaker not only meets the demand for high-precision "three-stage" protection DC circuit breakers in domestic and foreign markets, but also comprehensively improves the independent innovation ability of national enterprises in this industry, effectively promotes industry technological progress, and further consolidates and expands our factory's leading advantages in the field of power protection technology at home and abroad.

The GM5B-32 series plastic shell three-stage protection DC circuit breaker complies with GB14048.2 "Low Voltage Switchgear and Control Equipment - Low Voltage Circuit Breakers" and is suitable for use in power engineering with a nominal DC voltage of 110V or 220V, a maximum working voltage not exceeding 250V, and a rated current of 16A to 32A. It is used for overcurrent protection of line facilities and electrical equipment, and can also be used for infrequent on-off operations. This circuit breaker has the characteristics of small size and short delay action, which is independent of the power supply voltage and only depends on the magnitude of the short-circuit current. This product is suitable for use by non professionals.

Technical Specifications

[DC circuit breaker]GM5FB Series Selective Protection Molded Case DC Circuit Breaker

2026-6-10 10:47:55

Scope of application
The GM5FB series selective protection molded case DC circuit breaker is one of the new circuit breakers developed by our factory using internationally leading design and manufacturing technology, with independent intellectual property rights, and based on our factory's higher than international and national standards. Its rated working voltage is DC250V, suitable for infrequent switching and starting in circuits with DC rated current of 63-800A. Circuit breakers have overload and short-circuit short delay protection functions, which can protect distribution lines and power equipment from damage. Its short-circuit short delay has the inverse time characteristic of a fuse, with good current limiting ability and delayed action function. If applied in the protection of important loads in the power system, it can prevent fault current from spreading and provide fully selective protection.

meet the standard
IEC60947-1 GB14048.1 General Provisions
IEC60947-2 GB14048.2 Low Voltage Circuit Breakers
IEC60947-4 GB14048.4 Contactors and Motor Starters
IEC60947-5-1 GB14048.5 Electromechanical Control Circuit Electrical Appliances

Technical parameters of GM5FB series selective protection molded case DC circuit breaker

[DC circuit breaker]GW3B Universal DC Circuit Breaker

2026-6-10 10:47:47

Scope of application
GW3B universal DC circuit breaker is suitable for DC systems with rated voltage of DC250V~DC1000V and rated current of 1000-2000A. It is used to distribute electrical energy and protect lines and power equipment from overload, undervoltage, short circuit and other hazards.

This circuit breaker has selective protection function, achieving graded coordination protection and backup protection between circuit breaker levels to reduce the scope of accidents in the power grid. Therefore, it is particularly suitable for protection systems of large capacity DC current power supplies.

The drawer type circuit breaker has an insertable structure, which improves the efficiency of use. Both the main and secondary circuits adopt an insertable structure, omitting the necessary isolating switches for fixed circuits, achieving dual use for one machine. At the same time, it brings great convenience to operation and maintenance, enhances safety, reliability, and flexibility in emergency situations.

meet the standard
IEC60947-1��GB14048.1
IEC60947-2��GB14048.2

Technical Specifications

[DC circuit breaker]TIB1Z-63 Small DC Circuit Breaker

2026-6-10 10:47:39

Compliant with standards: GB10963.2, IEC60898-2
Environmental temperature: -5 �� to 40 ��
Wiring capability: Suitable for wires of 25mm2 and below
Mechanical lifespan: 20000
Breaking capacity: 10KA
Release characteristic: C
Rated voltage: 125V (1p), 250V (2p) DC
Rated current: 6A, 10A, 16A, 20A, 25A, 32A, 40A

TIB1Z-63 Small DC Circuit Breaker

[DC circuit breaker]DM8G series magnetic field circuit breaker

2026-6-10 10:47:30

DM8G series magnetic field circuit breaker

Technical parameters of magnetic field circuit breaker without normally closed secondary contacts

model project		DM8G- 200/800	DM8G- 400/800	DM8G- 630/800	DM8G- 800/800	DM8G- 1000/800	DM8G- 1600/800	DM8G- 2500/800
Rated voltage Ue (V)		eight hundred
Strong excitation voltage (V)		one thousand and six hundred
Main circuit withstand voltage * * (V)		four thousand and two hundred
Rated current * (A)		two hundred	four hundred	six hundred and thirty	eight hundred	one thousand	one thousand and six hundred	two thousand and five hundred
Breaking current (A)		six hundred	one thousand and two hundred	one thousand eight hundred and ninety	two thousand and four hundred	three thousand	four thousand and eight hundred	seven thousand and five hundred
Building pressure capacity (V)		>2500 (single fracture �� 1400)
Mechanical lifespan (times)		>7500
Electrical lifespan (times)		>600					>400
Contact opening distance (mm)		>17
Contact pressure (N)		180±20
power control	close	DC220V<5A
	trip	DC220V<2A
Closed (ms)	Operating Time	Electric motor closing
	synchronicity	��1
Split excitation (ms)	Operating Time	��50
	synchronicity	��1

Technical parameters of magnetic field circuit breaker with normally closed secondary contacts

model project		DM8G- 200/800	DM8G- 400/800	DM8G- 630/800	DM8G- 800/800	DM8G- 1000/800	DM8G- 1600/800	DM8G- 2500/800
Rated voltage Ue (V)		eight hundred
Strong excitation voltage (V)		one thousand and six hundred
Main circuit withstand voltage * * (V)		four thousand and two hundred
Rated current of normally open main contact * (A)		two hundred	four hundred	six hundred and thirty	eight hundred	one thousand	one thousand and six hundred	two thousand and five hundred
Rated current of normally closed auxiliary contact * (A)		six hundred
Breaking current (A)		four hundred	eight hundred	one thousand two hundred and sixty	one thousand and six hundred	two thousand	three thousand and two hundred	five thousand
Building pressure capacity (V)		>2500 (single fracture �� 1400)
Mechanical lifespan (times)		>7500
Electrical lifespan (times)		>600					>400
Normally open main contact opening distance (mm)		>17
Normally closed auxiliary contact opening distance (mm)		>14
Normally open main contact pressure (N)		180±20
Normally closed auxiliary contact pressure (N)		49±5.9
power control	close	DC220V<5A
	trip	DC220V<2A
Closed (ms)	Operating Time	Electric motor closing
	synchronicity	��1
Split excitation (ms)	Operating Time	��50
	synchronicity	��1

DM8G series magnetic field circuit breaker

[DC circuit breaker]GSB1Z series small DC circuit breaker

2026-6-10 10:47:22

GSB1Z series small DC circuit breaker

[DC circuit breaker]QDS5 type fast circuit breaker

2026-6-10 10:47:14

QDS5 type fast circuit breaker

[DC circuit breaker]QDS8 series DC fast circuit breaker

2026-6-10 10:47:05

The QDS8 series DC fast circuit breaker is used as a main circuit short circuit and overload protection in subway and light rail vehicles, industrial and mining electric locomotives, and railway traction locomotives. It can also be used as a protective switch for silicon rectification devices and DC motors in industrial fields such as steel rolling and mining, and as a graded protection circuit breaker for small DC feeding devices
Rated voltage Ue	1500V	mechanical life	30000 times
Rated current In	1250A	Operating voltage	DC110��50V
Maximum operating voltage	1800V	Number of auxiliary contacts	6 normally open, 6 normally closed
Maximum breaking capacity	35KA(T=15ms)	Auxiliary contact capacity	AC220V 10A,DC110V 1A
Breaking overvoltage	1.5-2.1Ue	Overall dimensions	420165485
Inherent action time	2-3ms	installation dimensions	4-��9��130*145mm
Current setting range	0.61.25; 0.91.8; 1.25*2.7KA	weight	<37kg
Electrical lifespan	1000 times	twelve

QDS8 series DC fast circuit breaker

[DC circuit breaker]DS16 DC Fast Circuit Breaker

2026-6-10 10:46:57

Rated voltage (V)	1500V	Control power supply (V)	DC110
Rated current (A)	four thousand	Dimensions (mm)	761380860
Maximum operating voltage	1800V	Installation size (mm)	4-��11��320*160
Rated limit breaking (KA)	75(T=15ms) 110(T=15ms)	Number of auxiliary contacts	5NC+5NO
Mechanical lifespan (times)	twenty thousand	Weight (Kg)	one hundred and ten
Electrical lifespan (times)	five hundred	Inherent action time (ms)	four
Current setting range (KA)	2-5��4-10	Auxiliary contact capacity	AC220V 10A
Current setting range	2-8��4-15 DC110V 1A	twelve

DS16 DC fast circuit breaker

[DC circuit breaker]DM8B series magnetic field circuit breaker

2026-6-10 10:46:49

The DM8B magnetic field circuit breaker is suitable for use as a demagnetization protection circuit breaker in the main excitation circuit of generators with a rated voltage of DC800V and below and a rated current of 6300A and below, when combined with nonlinear resistors. Alternatively, it can be combined with appropriate constant resistance to form a demagnetization combination device for generators, suitable for excitation circuits of 600000 kilowatts and below with rated voltage of DC 500V and below, and rated current of 6300A and below, for demagnetization protection. In addition, it can also be used to disconnect excitation circuits under no-load or rated load, or to carry and analyze other DC circuits.

[DC circuit breaker]DS19 series DC fast circuit breaker

2026-6-10 10:46:40

DS19 DC fast circuit breaker (hereinafter referred to as circuit breaker) is mainly used for short-circuit and overload protection of rectifier units, DC motors, and feeder lines in circuits with rated voltage of 1600V DC and below and rated current of 4000A and below. It is particularly suitable as a power supply protection switch for subway and light rail traction substations, and can also be used as a protection switch for rectifier devices and DC motors in important industrial fields such as steel rolling and mining.

DS19 series DC fast circuit breaker models and their meanings:

Main technical parameters of DS19 series DC fast circuit breaker:

Rated voltage (Ue)	Maximum operating voltage	Rated ultimate breaking capacity	Inherent working hours	Electrical lifespan	Number of auxiliary contacts	Overall dimensions	Operating voltage
1600V	1800V	75KA(T=15ms)	6ms	four hundred two hundred	5NC+5ND	500, 400, 100, 50	DC220��110��50V; AC220V

Rated current (In)	Rated insulation voltage	Breaking overvoltage	Current setting range	mechanical life	Auxiliary contact capacity	installation dimensions	weight
2500A/4000A	4000V	(1.5��2.0)Ue	(1.25��2.7)KA; (2��5)KA (2��8)KA; (4��10)KA /(2��5)KA; (4��10)KA (2��8)KA; (4��15)KA	twenty thousand	AC220V 10A; DC110V 1A	4��11, 320*160(mm)	86kg 98kg

DS19 series DC fast circuit breaker

[DC circuit breaker]QDS7 series electric locomotive DC fast circuit breaker

2026-6-10 10:46:32

The QDS7 series DC fast circuit breaker for electric locomotives is suitable for short-circuit and overload protection in DC circuits with a rated current of 2000A and below in coal mines, mines, and industrial and mining electric locomotives.

Model and its meaning:

Main technical parameters:

Rated voltage UeV	Maximum operating voltage V	Set current range A	Breaking ability (KA) six (di/dt=3×10 A/S)	Overvoltage during disconnection/test voltage	Full break time (ms)	Mechanical lifespan (times)	Rated breaking capacity (times)
one thousand and five hundred	one thousand and eight hundred	��0.8-2)Ie	thirty	��3	��30	twenty thousand	2Ie��180

[DC circuit breaker]DM8 series magnetic field circuit breaker

2026-6-10 10:46:24

The main specifications of DM8 series magnetic field circuit breakers are:

DM8-200��400��630��800��1000��1600��2500/500-��1/0��1/1��2/0��2/2��
DM8-200��400��630��800��1000��1600��2500/800-��1/0��1/1��2/0��2/2��

Main technical parameters:
	DM4 series magnetic field circuit breaker		DM8 series magnetic field circuit breaker
Rated voltage (V)	five hundred	eight hundred	five hundred	eight hundred
Strong excitation voltage (V)	one thousand two hundred and fifty	one thousand and six hundred	one thousand two hundred and fifty	one thousand and six hundred
Main circuit withstand voltage (V)	four thousand and two hundred
Rated current (A)	1000, 1600, 2500, 4000		200, 400, 630, 800, 1000, 1600, 2500
Breaking current (A)	3000, 4800, 7500, 12000		400, 800, 1260, 1600, 2000, 3200, 5000	600, 1200, 1890, 2400, 3000, 4800, 7500
Building pressure capacity (Loop inductance 1H)	>1500		>2500 (single fracture>1400)
Electrical lifespan (times)	four hundred		six hundred	four hundred
Mechanical lifespan (times)	five thousand		seven thousand and five hundred
Closing operation action time (ms)	<110		Electric motor closing
Excitation operation action time (ms)	<135		<50

DM8 series magnetic field circuit breaker

[DC circuit breaker]DM4 series magnetic field circuit breaker

2026-6-10 10:46:15

The main specifications of DM4 series magnetic field circuit breakers are:

DM4-1000��1600��2500��4000/500-(1��2)
DM4-1000��1600��2500��4000/800-(1��2)

	DM4 series magnetic field circuit breaker		DM8 series magnetic field circuit breaker
Rated voltage (V)	five hundred	eight hundred	five hundred	eight hundred
Strong excitation voltage (V)	one thousand two hundred and fifty	one thousand and six hundred	one thousand two hundred and fifty	one thousand and six hundred
Main circuit withstand voltage (V)	four thousand and two hundred
Rated current (A)	1000, 1600, 2500, 4000		200, 400, 630, 800, 1000, 1600, 2500
Breaking current (A)	3000, 4800, 7500, 12000		400, 800, 1260, 1600, 2000, 3200, 5000	600, 1200, 1890, 2400, 3000, 4800, 7500
Building pressure capacity (Loop inductance 1H)	>1500		>2500 (single fracture>1400)
Electrical lifespan (times)	four hundred		six hundred	four hundred
Mechanical lifespan (times)	five thousand		seven thousand and five hundred
Closing operation action time (ms)	<110		Electric motor closing
Excitation operation action time (ms)	<135		<50

DM4 series magnetic field circuit breaker

[DC circuit breaker]DS12 series DC fast circuit breaker

2026-6-10 10:46:06

The DS12/DS14 series DC fast circuit breaker is suitable for short-circuit and overload protection in DC circuits with a rated current of 6300A and below at 1500V. Suitable for protection switches of silicon rectifier units and DC motor units in electrified railways, urban traction, mining, steel rolling, chemical industry, and other fields.

DS12 series DC fast circuit breaker models and their meanings:

Main technical parameters of DS12 series DC fast circuit breaker:

Set current range A	Breaking ability (KA) six ��di/dt=3×10 A/S)	Overvoltage during disconnection/test voltage	Full break time (ms)	Current limiting coefficient	Mechanical lifespan (times)	Electrical lifespan (times)
��0.8-2)Ie	30, 40, 50	��3	thirty	��0.65 ��0.7	five thousand

model project		DS12- 10/08	DS12- 20/08	DS12- 30/08	DS12- 60/08	DS14- 10/15	DS14- 20/15	DS14- 32/15	DS14- 63/15
Rated voltage V		800V				1500V
Rated current A		one thousand	two thousand	three thousand	six thousand	one thousand	two thousand	three thousand and two hundred	six thousand and three hundred
Rated current range A		800-2000	1600-4000	2400-6000	4800-12000	800-2000	1600-4000	2400-6300	4800-12600
Mechanical lifespan (times)		five thousand	five thousand	four thousand	four thousand	five thousand	five thousand	four thousand	four thousand
Electrical lifespan (times)		five hundred	four hundred	two hundred	one hundred	five hundred	four hundred	two hundred	one hundred
close the circuit	Voltage V ��AC,DC��	220/28 110/56	220/28 110/56	220/34 110/68	220/56 110/78	220/28 110/56	220/28 110/56	220/34 110/68	220/56 110/98

DS12 series DC fast circuit breaker

[DC circuit breaker]DS14 series DC fast circuit breaker DS14-10/15 20/15 32/15

2026-6-10 10:45:57

Model and its meaning:

Main technical parameters:

Set current range A	Breaking ability (KA) six ��di/dt=3×10 A/S)	Overvoltage during disconnection/test voltage	Full break time (ms)	Current limiting coefficient	Mechanical lifespan (times)	Electrical lifespan (times)
��0.8-2)Ie	30, 40, 50	��3	thirty	��0.65 ��0.7	five thousand	500, 400, 100, 50

DS14 series DC fast circuit breaker

[DC circuit breaker]GMB series three-stage protection DC molded case circuit breaker

2026-6-10 10:45:49

The GMB series three-stage protection DC plastic case circuit breaker is a new type of circuit breaker developed by Beijing People's Electric Appliance Factory using international advanced design and manufacturing technology. Its rated working voltage is DC660V and below, and its rated working current is up to 1250A in circuits. Circuit breakers have short-circuit, overload, and undervoltage protection functions, which can protect the circuit and power equipment from damage.
[Compliant with standards]
IEC60947-1 GB14048.1 General Provisions
IEC60947-2 GB14048.2 Low Voltage Circuit Breakers
IEC60947-4 GB14048.4 Contactors and Motor Starters
IEC60947-5 GB14048.5 Electromechanical Control Circuit Electrical Appliances

[Features]
The G series fully selective three-stage protection DC circuit breaker adopts the internationally pioneering patented arc extinguishing technology CCV, which is the quadruple acceleration and narrow gap breaking free arc extinguishing technology, making the arcing distance shorter and the breaking capacity higher (DC250V) 20kA, (DC440) 15kA, and Ics=100% Icu.
Small size, accurate short circuit delay, complete specifications
Normally, according to standard specifications, for the differential coordination of battery pack power systems, the calculation of short-circuit current can be simplified without considering parameters such as resistance, cable cross-sectional area, copper content, current limiting coefficient, and cable thermal stability. The upper and lower level circuit breakers only need to be selected according to the rated current level to achieve fully selective three-stage protection, which meets international standards.
The GMB series three-stage protective plastic case circuit breaker adopts the most advanced international hardness and anti-corrosion surface treatment process of soft nitriding and matte electroplating in terms of anti-corrosion performance, which makes the product's anti-corrosion performance higher than nickel plating and suitable for high protection level use.

[Basic Parameters]
Rated current of shell level: 1002254008001250A
Polar number: 2P
Rated working voltage: DC250V
Ultimate short-circuit breaking capacity: M standard type, H high type, R advanced type
Operation mode: direct operation of the body, P electric operating mechanism, Z rotating handle operation;
Wiring methods: front board wiring, B-board rear wiring, C plug-in wiring

[Model meaning]
GMB 225 M/2 3 00R 125A
The GMB series shell level rated current is 225A, with a maximum short-circuit breaking capacity of M standard type two pole three-stage protection DC plastic shell circuit breaker. It adopts a compound release (overload long delay+short-circuit short delay), rated working current is 125A, and is wired in front of the board.

[Operating Environment]
Altitude of 2000m and below;
The temperature of the surrounding medium should not be lower than -5 �� and not higher than 40 ��. If it is higher than 40 ��, it can be used with reduced capacity;
Can withstand the influence of humid air;
Capable of withstanding the effects of salt spray and oil mist;
Can tolerate the influence of mold;
Can work reliably under normal ship vibration;
In a medium without explosive hazards, and where there is no gas or conductive dust that can corrode metals or damage insulation;
In a place without rain or snow invasion.

[DC circuit breaker]GM series DC molded case circuit breaker

2026-6-10 10:45:40

The GM series DC molded case circuit breaker is a new type of circuit breaker developed by Beijing People's Electric Appliance Factory using international advanced design and manufacturing technology. Its rated working voltage is DC250V, DC440V, DC660V, DC1140V, and rated working current is up to 1250A in circuits. Circuit breakers have short-circuit, overload, and undervoltage protection functions, which can protect the circuit and power equipment from damage.

[Compliant with standards]
IEC60947-1 GB14048.1 General Provisions
IEC60947-2 GB14048.2 Low Voltage Circuit Breakers

[Features]
The GM series molded case circuit breaker adopts patented arc extinguishing technology CCV, which includes quadruple acceleration and narrow gap breaking to eliminate free arc extinguishing technology, achieving zero arcing and higher breaking capacity (DC250V) 20kA, (DC440) 15kA, and Ics=100% Icu. In terms of anti-corrosion performance, the most advanced international process of increasing hardness and anti-corrosion surface treatment, soft nitriding and matte electroplating, is adopted to make the product's anti-corrosion performance higher than nickel plating, suitable for high protection level use, small size, and beautiful appearance. The world's first GM100 series with load indicator lights eliminates the need for dedicated indicator lights on the screen panel, saving space and simplifying the wiring inside the screen.

[Basic Parameters]
Rated current of shell level: 1002254008001250A
Polar numbers: 2P, 3P, 4P
Rated working voltage: DC250V, DC440V, DC660V, DC1140V
Ultimate short-circuit breaking capacity: M standard type, H high type, R advanced type
Operation mode: direct operation of the body, P electric operating mechanism, Z rotating handle operation;
Wiring methods: front board wiring, B-board rear wiring, C plug-in wiring

[Model meaning]
GM 225 M/2 3 00R 125A
That is, the GM series shell level rated current is 225A, the ultimate short-circuit breaking capacity is M standard type two pole DC plastic shell circuit breaker, using a compound release (overload long delay+short circuit instantaneous), the rated working current is 125A, and the wiring is in front of the board.

[Operating Environment]
Altitude of 2000m and below;
The temperature of the surrounding medium should not be lower than -5 �� and not higher than 40 ��. If it is higher than 40 ��, it can be used with reduced capacity;
Can withstand the influence of humid air;
Capable of withstanding the effects of salt spray and oil mist;
Can tolerate the influence of mold;
Can work reliably under normal ship vibration;
In a medium without explosive hazards, and where there is no gas or conductive dust that can corrode metals or damage insulation;
In a place without rain or snow invasion.