Shanghai Huabang Industrial Business Network - SF6 gas circuit breaker

[SF6 gas circuit breaker]LW31C-252 Three phase mechanical linkage outdoor high-voltage SF6 circuit breaker

2026-6-10 20:37:55

The LW31C-252 three-phase mechanical linkage outdoor high-voltage SF6 circuit breaker uses sulfur hexafluoride as the insulation and arc extinguishing medium. This circuit breaker is used as the main transformer protection equipment in power systems with AC 50Hz, rated voltage of 252kV, and rated current of 3150 and 4000A. It is equipped with an ETNA hydraulic operating mechanism and can perform three-phase fast automatic reclosing operation.

LW31C-252 three-phase mechanical linkage outdoor high-voltage SF6 circuit breaker features:
1. Simple design, mature components, and high reliability.
2. By applying the double principle, the contacts have precise geometric shapes and can be suitable for various operating conditions.
3. Contact separation is achieved through precise adjustment of arc blowing, resulting in minimal overvoltage when operating inductive currents.
4. Due to the enclosed state inside the arc extinguishing chamber, a hydraulic system is used in the hydraulic spring operating mechanism, resulting in low working noise.
5. Imported hydraulic mechanism is adopted, which has the advantages of stable performance, reliability, and high mechanical life.
Due to the use of special materials and multiple SF6 sealing systems for the separation of the two types of contacts, the maintenance interval is long.

[SF6 gas circuit breaker]Outdoor high-pressure sulfur hexafluoride automatic sectionalizer on columns

2026-6-10 20:37:46

The FDL4-12/400 outdoor AC high-voltage sulfur hexafluoride automatic sectionalizer uses sulfur hexafluoride gas as the arc extinguishing medium and insulation medium. It is mainly used as a control and protection device in AC 50Hz, 12kV transmission lines, and can be coordinated with devices such as reclosers, circuit breakers, and fuses. When the load side line or equipment fails and the fault current reaches or exceeds the rated starting current setting value, the segmenter counts the disconnection actions of the backup protection equipment. When the counting times reach the set value, the segmenter automatically opens and closes to lock. The segmenter has the function of opening and locking state memory, and also has the function of automatic tripping with single-phase grounding of the busbar, without the need for external auxiliary power supply. Remote control of on-site opening and closing can also be achieved through RS485 interface to achieve three remote controls.

Structural characteristics of FDL4-12/400 outdoor column mounted high-pressure sulfur hexafluoride automatic segmenter:
1. Adopting electronic PT and CT float charging, and capable of AC220V charging.
2. Equipped with RS485 and RS232 communication interfaces and multiple communication protocols.
3. Implement the "four remote" functions, namely remote control, remote adjustment, remote signaling, and remote sensing.
4. Equipped with on-site remote control switch opening and closing function, with a remote control distance of 30 meters.
5. Set the tripping current anytime and anywhere, with flexible setting values and high functionality.
6. It has the function of suppressing current surge.
7. The microcomputer protection and measurement device is equipped with a set of 20 batteries, and the battery capacity can support 50 hours after a power outage.

FDL4-12/400 Outdoor Column High Pressure Sulfur Hexafluoride Automatic Segmenter Model Meaning

Main technical parameters of FDL4-12/400 outdoor column mounted high-pressure sulfur hexafluoride automatic segmenter

FDL4-12/400 Outdoor Column High Pressure Sulfur Hexafluoride Automatic Segmenter Appearance and Installation Dimensions

FDL4-12/400 Outdoor Column High Pressure Sulfur Hexafluoride Automatic Segmenter

[SF6 gas circuit breaker]Outdoor high-pressure sulfur hexafluoride automatic sectionalizer on columns

2026-6-10 20:37:37

MZDL4-12/630-20 outdoor column mounted high-pressure sulfur hexafluoride automatic segmenter uses sulfur hexafluoride gas as the arc extinguishing medium and insulation medium. It is mainly used as a control and protection device in AC 50Hz, 12kV transmission lines, and can be coordinated with devices such as reclosers, circuit breakers, and fuses. When the load side line or equipment fails and the fault current reaches or exceeds the rated starting current setting value, the segmenter counts the disconnection actions of the backup protection equipment. When the counting times reach the set value, the segmenter automatically opens and closes to lock. The segmenter has the function of opening and locking state memory, and also has the function of automatic tripping with single-phase grounding of the busbar, without the need for external auxiliary power supply. Remote control of on-site opening and closing can also be achieved through RS485 interface to achieve three remote controls.

Structural features:
1. Adopting electronic PT and CT float charging, and capable of AC220V charging.
2. Equipped with RS485 and RS232 communication interfaces and multiple communication protocols.
3. Implement the "four remote" functions, namely remote control, remote adjustment, remote signaling, and remote sensing.
4. Equipped with on-site remote control switch opening and closing function, with a remote control distance of 30 meters.
5. Set the tripping current anytime and anywhere, with flexible setting values and high functionality.
6. It has the function of suppressing current surge.
7. The microcomputer protection and measurement device is equipped with a set of 20 batteries, and the battery capacity can support 50 hours after a power outage.

MZDL4-12/630-20 Outdoor Column High Pressure Sulfur Hexafluoride Automatic Segmenter Main Technical Parameters

MZDL4-12/630-20 Outdoor Column High Pressure Sulfur Hexafluoride Automatic Segmenter Appearance and Installation Dimensions

MZDL4-12/630-20 Outdoor Column High Pressure Sulfur Hexafluoride Automatic Segmenter

[SF6 gas circuit breaker]LW36-72.5 Outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:37:28

LW36-72.5/126 Outdoor High Voltage AC Ceramic Column

Environmental conditions for use
Environmental temperature -25~+40 ��/-40~+40 �� (cold resistant type)
Altitude �� 2500m
Monthly average air humidity not exceeding 90% (25 ��)
Wind speed not exceeding 35m/s
Sunshine intensity �� 1000w/m2
Earthquake intensity of 8 degrees
Ice thickness �� 10mm
Pollution level III/IV
Maximum daily temperature difference of 25K

Main technical parameters of LW36-72.5 outdoor high-voltage sulfur hexafluoride circuit breaker

serial number	Technical requirements	unit	Numerical value	Numerical value
one	rated voltage	kV	seventy-two point five	one hundred and twenty-six
two	rated frequency	Hz	fifty	fifty
three	rated current	A	three thousand one hundred and fifty	three thousand one hundred and fifty
four	Rated breaking current of circuit breaker	kA	forty	forty
five	Rated short-circuit closing current	kA	one hundred	one hundred
six	Initial polar coefficient		one point five	one point five
seven	Rated short-time withstand current	kA	40��4S��	40��4S��
eight	Rated peak withstand current	kA	one hundred	one hundred
nine	Near area fault breaking current	kA	36/30	36/30
ten	Rated out of step breaking current	kA	ten	ten
eleven	Rated short-time power frequency withstand voltage	kV	160 (opposite ground, alternating)	230 (opposite ground, alternating)
eleven	Rated short-time power frequency withstand voltage	kV	202 (fracture surface)	230+73 (fracture surface)
twelve	Rated lightning impulse withstand voltage (peak)	kV	350 (to ground, alternating)	550 (to ground, alternating)
twelve	Rated lightning impulse withstand voltage (peak)	kV	410 (fracture surface)	550+103 (fracture surface)
thirteen	5-minute zero gauge voltage power frequency withstand voltage	kV	eighty-four	ninety-five
fourteen	Rated operating sequence		0-0.3s-C0-180s-C0	0-0.3s-C0-180s-C0
fifteen	closing time	ms	75±8	75±8
sixteen	Opening time	ms	30±5	30±5
seventeen	Total breaking time		�� 3 cycles	�� 3 cycles
eighteen	SF6 gas pressure (20 ��)	MPa	0.6/0.55/0.5	0.6/0.55/0.5
nineteen	Annual SF6 gas leakage rate	%	��0.5	��0.5
twenty	Equipped operating mechanism		CT30 Spring Operating Mechanism	CT30 Spring Operating Mechanism
twenty-one	Horizontal and vertical tension of wiring terminals	N	one thousand two hundred and fifty	one thousand two hundred and fifty
twenty-two	Horizontal transverse tension of wiring terminals	N	seven hundred and fifty	seven hundred and fifty
twenty-three	Vertical tension of terminal block	N	one thousand	one thousand

[SF6 gas circuit breaker]LW37-40.5 High voltage sulfur hexafluoride circuit breaker

2026-6-10 20:37:20

LW37-40.5 and LW37-40.5 (G) circuit breakers are outdoor installation, three-phase, AC 40.5kV high-voltage transmission and transformation control and protection equipment that use SF6 gas as insulation and arc extinguishing medium. The circuit breaker adopts the principle of self rotating arc extinguishing and belongs to the ceramic column sulfur hexafluoride circuit breaker. It adopts a three-phase split structure, with one break for each phase, which can be used to open and close rated current and fault current, switch capacitor groups, especially suitable for frequent operation, and can also be used as a contact circuit breaker.
The circuit breaker complies with standards such as IEC56 "High Voltage AC Circuit Breakers" and GB1984 "High Voltage AC Circuit Breakers".

Main technical parameters of LW37-40.5 high-voltage sulfur hexafluoride circuit breaker
Environmental conditions for use: altitude of 1000m, 3000m; Temperature+40 to -35 degrees (special requirements can reach up to 40 degrees)
Rated voltage: 40.5kV
Rated current: 1600A
Rated short-circuit breaking current: 25kA
Rated short-circuit breaking current breaking times: 25 times
Mechanical lifespan: 5000 cycles

Product features
1. Overall structure aspect
a) The circuit breaker is equipped with CT10A type spring operated mechanism, which can be installed in general type (parallel arrangement) and elevated type (middle hanging type), ensuring safe operation and convenient maintenance.
b) Circuit breakers are divided into plain type LW37-40.5 and plateau type LW37-40.5 (G) according to altitude.
2. In terms of technical performance
a) Adopting the self powered (rotary arc+thermal expansion) arc extinguishing principle, the circuit breaker requires less operating power (500-600J) for opening and closing, improving the mechanical performance of the product;
b) Adopting a built-in LR (B) -40.5 current transformer, the product is easy to install and debug, and occupies a small area;
c) The few sealing points ensure the sealing performance of the circuit breaker

[SF6 gas circuit breaker]LW24-40.5/72.5 Outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:37:11

name		unit	LW24-40.5	LW24-70.5
rated voltage		kV	forty point five	seventy point five
rated current		A	1250,2000,2500,3150
rated frequency		Hz	fifty
Rated short-circuit breaking current		kA	forty	thirty-one point five
Rated short-time withstand current and duration		kA/s	40/4	31.5/4
Rated peak withstand current		kA	one hundred	eighty
Rated closing current (peak value)		kA	100	eighty
Rated short-time power frequency withstand voltage (effective value)	fracture	kV	95+23.4	160+42
	to the ground		ninety-five	one hundred and sixty
Rated lightning impulse withstand voltage	fracture	kV	185+33	350+59
	to the ground		one hundred and eighty-five	three hundred and fifty
Creepage distance ratio		mm/kV	thirty-one	thirty-one
Total breaking time		ms	��60
Inherent opening time		ms	��30
closing time		ms	��100
mechanical life		time	ten thousand
Rated operating sequence			O-0.3s-CO-180s-CO or O-15s-CO
Rated pressure of SF6 gas		MPa	0.50��0.40
SF6 gas alarm/lockout pressure		MPa	0.45/0.40��0.35/0.30
Rated voltage of control circuit		V	DC220/110
Rated voltage of energy storage motor circuit		V	DC220/110��AC220/110
Rated back-to-back capacitor bank breaking current		A	1500,2000	two thousand
Rated short-circuit breaking current breaking times		time	twenty
Rated parallel reactor suitable for current		A	1600,2000	one thousand and five hundred

LW24-40.5/72.5 Outdoor High Voltage SF6 Circuit Breaker

[SF6 gas circuit breaker]LW42-40.5 SF6 Circuit Breaker

2026-6-10 20:37:01

LW42-40.5 SF6 Circuit Breaker

Rated voltage 40.5kV, rated current 2000A, rated short-time withstand current 31.5kA, rated short-circuit duration 4s, rated peak withstand current 80kA. The circuit breaker is equipped with CT14 spring operated mechanism.

[SF6 gas circuit breaker]SF6 Indoor high-voltage handcart type SF6 circuit breaker LN2-40.5 LN2-12

2026-6-10 20:36:49

LN2-40.5, 12 type indoor high-voltage handcart sulfur hexafluoride circuit breaker, suitable for three-phase AC 50Hz, 35kV, 10kV power systems. It can be used to open and close rated current and fault current, and can be used in frequent operating situations. It can also be used as a circuit breaker for connecting and closing capacitor banks.

LN2-40.5 indoor high-voltage handcart SF6 circuit breaker equipped with CT10 spring operating mechanism (AC and DC dual-use)

Technical Specifications
Main technical parameters LN2-40.5 LN2-12
��
Rated voltage 40.5 12
Rated current 1250 1250 1600 1250
Rated short-circuit breaking current 16 25 25 25
Rated short-circuit breaking current breaking times (times) 20 20 20 20
Mechanical lifespan (times) 6000 6000 3000 10000

[SF6 gas circuit breaker]ZW17-40.5 Outdoor High Voltage SF6 High Voltage Circuit Breaker

2026-6-10 20:36:41

ZW17-40.5 outdoor high-voltage SF6 circuit breaker is a three-phase AC 50Hz outdoor high-voltage electrical equipment, suitable for control and protection of 40.5kV transmission and distribution systems, and can also be used for connecting circuit breakers and opening and closing capacitor banks.

ZW17-40.5 series vacuum circuit breaker is an outdoor high-voltage switchgear with three-phase AC 50Hz, which can be widely used in 40.5kV power transmission and transformation systems as a means of breaking and closing load currents, overload currents, and short-circuit currents, especially suitable for places with frequent operation. The insulation performance of oral products is low, and the design is improved based on the theoretical basis of ZW17-40.5 products. 2. This product complies with the requirements of GB1984-2003 "AC High Voltage Circuit Breakers". Main features: 1. Outdoor vacuum arc extinguishing chamber is selected, which has the advantages of safety, reliability, and long service life; 2. Adopting new insulation materials to avoid the impact caused by inflation, oil filling, etc; 3. Current transformers have the characteristics of high precision, large capacity, variable ratio, and multiple stages; 4. Can be equipped with two mechanisms: electromagnetic operation or spring operation; 5. Circuit breakers have three types of structures: horizontal, central, and CT external.

Product advantages

1. This product complies with the requirements of the national standard GB1984-2003 "AC High Voltage Circuit Breakers" and the International Electrotechnical Commission standard IEC56 publication "High Voltage AC Circuit Breakers".
2. This product applies advanced arc extinguishing principles, with excellent breaking performance, fast recovery of dielectric strength, low risk of reignition and heavy breakdown, short arc ignition time, and long electrical life;
3. No combustion or explosion hazards, can be used in densely populated areas;
4. Equipped with CT10-A electric spring operating mechanism with excellent performance, low operating power and high reliability;
5. Outdoor dry-type current transformers can be attached according to user requirements

[SF6 gas circuit breaker]LW22B-40.5/T2000-31.5 Outdoor high-voltage AC sulfur hexafluoride circuit breaker

2026-6-10 20:36:32

The LW22B-40.5/T2000-31.5 outdoor high-voltage AC sulfur hexafluoride circuit breaker is equipped with a CT14 spring operated mechanism, which can be suspended, parallel, and vertically arranged. This sulfur hexafluoride circuit breaker can also be equipped with a built-in current transformer.

The main technical parameters of LW22B-40.5/T2000-31.5 outdoor high-voltage AC sulfur hexafluoride circuit breaker are as follows:

Rated voltage: 40.5 kV;
Rated current: 2000A;
Rated short-circuit breaking current: 31.5 kA (duration: 4s);
Rated short-circuit closing current (peak): 80 kA;
Rated power frequency withstand voltage (effective value to ground/fracture): 95/110 kV;
Rated lightning impulse withstand voltage (peak to ground/fracture): 185/215 kV;
Rated SF6 gas pressure (gauge pressure at 20 ��): 0.45 MPa;

[SF6 gas circuit breaker]LW17A-126/T3150-31.5 Outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:36:23

The LW17A-126/T3150-31.5 outdoor high-voltage sulfur hexafluoride circuit breaker is designed based on the technology introduced by ABB, using sulfur hexafluoride gas as the main insulation and arc extinguishing medium, and equipped with a highly reliable spring operating mechanism. It is mainly used to complete operations such as switching normal load current, cutting off fault current, and converting power lines, achieving control and protection of the 126kV power system.

The main technical parameters are as follows:

Rated voltage: 126kV
Rated current: 3150A
Rated short-time breaking current: 34.5kA (duration: 4s)
Rated short-circuit closing current (peak): 80kA
Rated power frequency withstand voltage: 230kV
Rated lightning impulse withstand voltage: 550kV
Rated SF6 gas pressure (gauge pressure at 20 ��) 0.5 MPa

[SF6 gas circuit breaker]LW31A/B-252 Outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:36:14

The LW31A (B) -252 outdoor high-voltage sulfur hexafluoride circuit breaker uses sulfur hexafluoride gas as the main insulation and arc extinguishing medium, and is equipped with a highly reliable hydraulic spring operating mechanism. It is mainly used to complete operations such as switching normal load current, cutting off fault current, and converting power lines, achieving control and protection of three-phase mechanical separation and three-phase electrical linkage in the 220kV power system. This product has the characteristics of short breaking time (2 cycles), large breaking capacity, high reliability, and frequent operation.

The main technical performance of LW31A/B-252 outdoor high-voltage sulfur hexafluoride circuit breaker is as follows:
Rated voltage: 252kV
Rated current: 4000A
Rated short-time withstand current 50kA (duration: 3s)
Rated peak withstand current 125kA
Initial opening coefficient: 1.5
Rated power frequency withstand voltage for 1 minute (effective value): 460kV
Rated lightning impulse withstand voltage (peak): 1050kV
Mechanical lifespan: 5000 cycles
Electric lifespan: 20 times

[SF6 gas circuit breaker]LN��-35 Type Indoor High Voltage SF6 Circuit Breaker

2026-6-10 20:36:06

LN �� -35 indoor high-voltage SF6 circuit breaker is suitable for use in power systems with AC frequency of 50HZ, rated working voltage of 35KV, and rated working current of 1250-3150A. It is used as a control and protection equipment for electrical equipment in industrial and mining enterprises, power stations, and substations. It can also be used as a control and protection equipment for frequent operation of capacitor banks, high-voltage motors, and electric furnace transformers.

Product model and name

LN �� -35 Indoor High Voltage SF6 Circuit Breaker Operating Conditions

1. Installation height not exceeding 1000m above sea level
2. The ambient temperature is -10~40 �� (the actual minimum temperature can reach -20 ��)
3. Relative humidity not exceeding 90% (25 ��)
4. The installation site should have no fire or explosion hazards, no chemical gases or vapors that severely corrode metals and insulation materials, and no severe vibrations

structural characteristics
The LN �� -35 SF6 circuit breaker is a column type three-phase structure, with the three phases fixed to the handcart through the bottom box and the upper three insulators. The spring operated mechanism drives the large shaft to rotate through the side rod, thereby driving the rocker arms of the three phases to push the small shaft, making the three-phase conductive rods and pistons move vertically in a straight line to achieve opening and closing. The opening force comes from the opening spring connected to the large shaft, and both opening and closing are equipped with oil and mechanical buffers.
The arc extinguishing chamber structure of LN �� -35 circuit breaker is mainly of the compressed air type, which generates a strong arc blowing effect towards the nozzle during the movement of the piston. A density relay is installed on the box to monitor the pressure changes of SF6 gas and automatically sound an alarm. Each phase circuit breaker is equipped with an adsorption cover inside, which contains F-03 adsorbent that can adsorb moisture and impurities in SF6 gas at any time. The dynamic and static contacts (arcing contacts) of the circuit breaker are made of high-strength and high-performance copper and copper tungsten 80 (WCu80) sintered as a whole, which has good conductivity and high arc resistance. Equipped with CT �� spring operating mechanism.

[SF6 gas circuit breaker]SF6 self powered circuit breaker

2026-6-10 20:35:57

The LW35-245 self powered sulfur hexafluoride circuit breaker is an outdoor AC three pole 50Hz high-voltage transmission and transformation equipment, used for opening and closing rated current, fault current or conversion lines, to achieve protection, control and operation of the transmission and transformation system, and can perform opening, closing and fast automatic reclosing operations as well as three pole electrical linkage.
This circuit breaker adopts the latest design principles and has the characteristics of simple structure, small size, low consumables, low required operating energy, high reliability, easy installation, and low noise. It is a new generation of high-voltage sulfur hexafluoride circuit breaker developed and researched by our company.

Environmental conditions for use
Environmental temperature: -30 �� to+50 ��.
Wind pressure: not exceeding 700pa.
Altitude: not exceeding 3000m.
Seismic intensity: not greater than 9 degrees.
Air pollution level: Level III.

Rated parameters of LW38-245 self powered SF6 circuit breaker
The rated parameters of circuit breakers and operating mechanisms are shown in Table 1.
Table 1 Rated Parameters of Circuit Breakers

serial number	name		Main technical parameters
one	Rated voltage kV		two hundred and twenty
two	Rated insulation level kV		See Table 2
three	Rated frequency Hz		fifty
four	Rated current A		three thousand one hundred and fifty
five	Rated short-circuit breaking current kA		forty
six	Rated short-time withstand current kA		forty
seven	Rated peak withstand current kA		one hundred
eight	Rated short-time duration s		three
nine	Rated short-circuit closing current (peak) kA		one hundred
ten	Near area fault breaking current kA		30/36
eleven	Rated line charging interruption current A		one hundred and twenty-five
twelve	Rated out of step breaking current kA		ten
thirteen	Accumulated breaking times under rated short-circuit breaking current (times)		sixteen
fourteen	First open pole factor		one point three
fifteen	SF6 gas pressure (20 ��) MPa		See Table 3
sixteen	Rated voltage of control circuit and auxiliary circuit power supply		See Table 4
seventeen	Rated operating sequence		Min-0.3s HeFen-180s HeFen
eighteen	mechanical properties		See Table 5
nineteen	Main circuit resistance ��		fifty
twenty	Mechanical durability of circuit breaker (times)		three thousand
twenty-one	Static tensile force of wiring terminals	Horizontal and Vertical FshA N	one thousand two hundred and fifty
		Horizontal and Horizontal FshB N	one thousand
		Vertical direction FtVm N	one thousand two hundred and fifty
twenty-two	Annual SF6 gas leakage rate		��1%
twenty-three	SF6 gas moisture content (V/V) 10		��150
twenty-four	Contact stroke (mm)		200-4(+4)
twenty-five	Contact stroke of contact (mm)		28-2(+4)

[SF6 gas circuit breaker]SF6 Outdoor AC High Voltage Porcelain Column Circuit Breaker

2026-6-10 20:35:48

The LW39-126 outdoor AC high-voltage porcelain column SF6 circuit breaker is a high-performance new type of SF6 circuit breaker designed based on fully absorbing and digesting advanced foreign SF6 circuit breaker technology, in accordance with national standards, and combined with domestic industrial manufacturing level. This product is used in power systems with a frequency of 50Hz and a nominal voltage of 110kV. It is the main power equipment for control and protection in power plants and substations. Can be equipped with CT �� - type spring operated mechanism, three-phase mechanical linkage operation. SF6 gas with excellent arc extinguishing and electrical insulation properties is filled internally. All seals use double O-ring seals, which can effectively prevent leakage.

Characteristics of LW39-126 Outdoor AC High Voltage Porcelain Column SF6 Circuit Breaker

a�� High breaking performance, capable of reliably breaking short circuits, out of step faults, and near-field faults at the output terminal.
b�� The arc extinguishing chamber is manufactured using spinning technology, with excellent airflow characteristics and a simple structure.
c�� Long electrical lifespan, capable of breaking 20 times at full capacity, long maintenance cycle, low maintenance workload, and maintenance free for 10 years under normal operating conditions.
d�� The operating mechanism has low energy and adopts a simple and reliable compact spring operating mechanism.
e�� The gas has a low rated inflation pressure and is not easily liquefied at low temperatures.
f�� Small footprint.
g�� Low noise level, suitable for residential areas.
h�� The on-site installation time is short.

Model meaning

Technical parameters of LW39-126 outdoor AC high-voltage porcelain column SF6 circuit breaker

name		unit	parameter
rated voltage		kV	one hundred and twenty-six
rated frequency		Hz	fifty
rated current		A	three thousand one hundred and fifty
Rated short-circuit breaking current		kA	31.5/40
Rated short-time withstand current		kA/s	31.5 (4)/40(3)
Rated peak closing current		kA	one hundred
Rated peak withstand current		kA	one hundred
Total breaking time		ms	��65
closing time		ms	��110
Prime Minister's disconnection coefficient			one point five
Out of step breaking current		kA	ten
Rated operating cycle			0-0.3s-CO-180s-CO
Continuous breaking rated short-circuit current electrical life		time	20��40kA��
mechanical life		time	six thousand
Rated sulfur hexafluoride gas pressure		Mpa	0.55MPa/0.60
Power frequency withstand voltage	relatively	kV	two hundred and seventy-five
Power frequency withstand voltage	Between fracture surfaces	kV	two hundred and seventy-five
Peak value of lightning impulse withstand voltage	relatively	kV	six hundred and fifty
Peak value of lightning impulse withstand voltage	Between fracture surfaces	kV	six hundred and fifty

Ordering Instructions
1. Model, specifications, quantity, and ordering period;
2. Required accessories, spare parts, tools, and SF6 gas, etc;
3. If there are any other requirements, please negotiate when placing the order.

[SF6 gas circuit breaker]Elevated outdoor sulfur hexafluoride circuit breaker (stainless steel casing)

2026-6-10 20:35:40

LW36-40.5 (G) - CJ elevated porcelain column outdoor AC high-voltage sulfur hexafluoride circuit breaker (hereinafter referred to as the circuit breaker) is a control and protection equipment for outdoor installation, three-phase, AC 40.5kv level high-voltage transmission and transformation systems using SF6 gas as arc extinguishing and insulation medium. It can be used to split and close rated current and fault current, switch capacitor groups and conversion lines, especially suitable for frequent operation, and can also be used as a circuit breaker for interconnection.

This circuit breaker complies with the requirements of IEC "High Voltage AC Circuit Breakers" and GB1984 "High Voltage AC Circuit Breakers".

LW36-40.5 Elevated Outdoor SF6 Circuit Breaker (Stainless Steel Shell) Model Meaning

Environmental conditions for product use
a. Environmental temperature:
Maximum temperature+40 ��
Minimum temperature -30 ��
b. Relative humidity:
Daily average relative humidity �� 90%
Monthly average relative humidity �� 95%
c. Altitude:
Normal operating conditions: altitude not exceeding 1000m (referred to as flat prototype);
Special usage conditions: altitude not exceeding 3000m (referred to as high prototype);
d. The wind speed does not exceed 34m/s (corresponding to 700Pa on the surface of the cylinder);
e. The seismic intensity shall not exceed 8 degrees (horizontal acceleration 0.25g, vertical acceleration 0.125g);
f. Air pollution level: Level IV; Minimum nominal creepage distance: 31mm/kV

LW36-40.5 Elevated Outdoor SF6 Circuit Breaker (Stainless Steel Shell) Main Technical Parameters
1. Main technical parameters are shown in Table 1

The circuit breaker is equipped with CT14 and CT35 spring buckle mechanisms, and its electrical schematic, wiring diagram, main technical parameters, and installation form of the mechanism are center mounted
Table 2 Main Technical Parameters of Institutions

LW36-40.5 Elevated Ceramic Column SF6 Circuit Breaker with Built in Current Transformer Dimensions
(Stainless steel shell)

The circuit breaker can be equipped with LR �� -40.5 built-in current transformers, and each current transformer can provide multiple small ones. The wiring scheme can be found on the transformer nameplate and electrical wiring diagram, with the main technical parameters
(Note: Current transformers can be equipped with protection levels and can be reinforced).

Main technical parameters of current transformers

Ordering Instructions
6.1 When placing an order, please indicate the model, name, rated voltage, rated current, and rated short-circuit breaking current of the circuit breaker, as well as the model, name, energy storage motor, and opening/closing coil of the spring mechanism used
Rated voltage and rated current.
6.2 This circuit breaker can be equipped with one set of current transformers per phase, with a maximum of four secondary transformers per set. The installation of the transformers is shown in Figure 1 or can be selected by the user at their own location. Please specify the installation location when placing an order
Order the model, quantity, transformation ratio, accuracy level, and installation method of the current transformer.
6.3 If the user has other requirements, please contact our company directly.

[SF6 gas circuit breaker]LW38-72.5 type self powered outdoor sulfur hexafluoride circuit breaker

2026-6-10 20:35:31

LW38-72.5 type self powered outdoor sulfur hexafluoride circuit breaker

[SF6 gas circuit breaker]LW38-126/145 type self powered outdoor sulfur hexafluoride circuit breaker (stainless steel casing)

2026-6-10 20:35:22

The LW38-126 open combination electrical appliance is more capable of meeting the needs of the domestic electricity market compared to similar products abroad. Our company can not only design flexible and diverse layout forms according to the different needs of users, but also implement the general contracting of primary equipment (including interval support busbars, towers, etc.) and secondary equipment for the entire substation.
LW38-126 open type combined electrical apparatus has advanced structure and excellent performance, and all technical parameters fully meet the requirements of GB and IEC standards. This product has the characteristics of compact structure and small footprint of enclosed composite electrical appliances, as well as the advantages of cheap price and convenient maintenance of open electrical appliances. Its footprint is reduced by about 60% compared to conventional power stations, making it particularly suitable for use in urban networks, mountainous areas, and industrial and mining enterprise substations.

Structure Introduction
The LW38-126/145 type self powered outdoor sulfur hexafluoride circuit breaker (stainless steel casing) has two layout forms: indoor and outdoor. Each layout form can be divided into circuit breaker interval and measurement and protection interval. Each interval consists of two main parts: a fixed part and a movable part. The fixed parts include isolation plugs, grounding switches, and local operation control cabinets. The movable part is a movable electrical module that assembles different electrical components together based on a small car. sever
The movable part of the circuit breaker interval is composed of self powered SF6 circuit breakers, current transformers, and isolation plugs. The movable part of the measurement and protection interval is composed of voltage transformers, lightning arresters, and isolation plugs.

Main Features
LW38-126/145 type self powered outdoor SF6 circuit breaker (stainless steel casing) is a new generation of self powered SF6 circuit breaker, equipped with a spring operated mechanism. The structural form of the circuit breaker interval and the measurement and protection interval is consistent. Both the car and the grounding switch are equipped with electric operating mechanisms, including circuit breakers, which can be operated locally in the control cabinet. The secondary wiring from the on-site control cabinet to each component is plug-in, and an intelligent control cabinet can also be provided to achieve unmanned operation. The one-time wiring method is flexible and does not affect the user's continuous power supply during maintenance. The overall layout is simple, beautiful, and suitable for both indoor and outdoor use.

Usage environment
Environmental temperature: -30 ��~+40 ��
Wind pressure: �� 700Pa
Altitude: �� 3000m
Seismic intensity: �� 8 degrees
Air pollution level: Level III
Ice thickness: 10mm

Ordering Instructions
The layout and installation method of LW38-126/145 type self powered outdoor sulfur hexafluoride circuit breaker (stainless steel shell) are indoor or outdoor. Rated voltage, rated current, and short-circuit breaking current. The model, name, current ratio, voltage ratio, number of secondary coils, accuracy level, and rated output of current transformers, voltage transformers, and lightning arresters. Number and operation mode of grounding switches. Are towers and interval support busbars configured for outdoor layout. Other special requirements of the user can be negotiated. Comparison between conventional layout and LW38-126 layout
Taking a substation with a single busbar segmented 6-way incoming and outgoing lines and 2 main transformers as an example, the comparison content is shown in the table below.

2. Comparison of cross-sections between conventional layout and LW38-126 layout

LW38-126/145 General Technical Parameters

LW38-126 145 type self powered outdoor sulfur hexafluoride circuit breaker (stainless steel casing)

[SF6 gas circuit breaker]LW16-40.5 Type SF6 Circuit Breaker

2026-6-10 20:35:13

1. Product features
The LW16-40.5 sulfur hexafluoride circuit breaker is an outdoor porcelain pillar structure, equipped with a CT10A spring operating mechanism. The mechanism and body have various layout forms such as high, parallel, parallel extension, and vertical. The overall volume is small, the weight is light, the structure is simple, the operation power is small, and the installation and debugging are convenient. Mechanical lifespan of 5000 times, suitable for frequent operation.
The arc extinguishing chamber adopts a spiral arc and auxiliary compressed air self energy type, with excellent breaking performance and an electrical life of 21 times. There is no cut-off voltage in the opening and closing capacitor group and reactor group.

Reliable sealing performance, using imported sealing gaskets, static sealing adopts an "O" - shaped sealing ring structure, and dynamic sealing adopts a "V" - shaped sealing ring with spring pressure compensation structure. The secondary wiring board of the transformer is produced by the imported mold using the pressure injection process, which has strong anti-aging performance and ensures that the annual air leakage rate is �� 1%.
The entire product adopts a stainless steel structure. The fasteners, panels, and shells are all made of stainless steel material, and the internal brackets are hot-dip galvanized and will never rust.
The measuring grade iron core of the internal transformer is made of microcrystalline alloy with high magnetic conductivity, and the accuracy level can reach 0.2 or 0.2S. Each phase of the product can be equipped with 2-4 current transformers.

Main technical parameters of LW16-40.5 sulfur hexafluoride circuit breaker

serial number	name		unit	data
one	rated voltage		kV	forty point five
two	maximum voltage		kV	forty point five
three	Rated Absolute Edge level	Lightning impulse withstand voltage (full wave peak value)	kV	one hundred and eighty-five
three	Rated Absolute Edge level	Power frequency withstand voltage (1 minute)	kV	ninety-five
four	rated current		A	1600 2000
five	mechanical life		time	three thousand
six	Rated pressure of sulfur hexafluoride gas (gauge pressure at 20 ��)		MPa	0.6±0.015
seven	Sulfur hexafluoride gas replenishment alarm pressure (gauge pressure at 20 ��)		MPa	0.55±0.015
eight	Minimum functional pressure of sulfur hexafluoride gas		MPa	0.52±0.015
nine	Rated short-circuit breaking current		kA	25 31.5
ten	Rated short-circuit closing current (peak)		kA	sixty-three
eleven	Rated short-time withstand current (thermal stability current)		kA	twenty-five
twelve	Rated peak withstand current (dynamic stability current)		kA	sixty-three
thirteen	Rated out of step breaking current		kA	six point three
fourteen	Accumulated breaking times under rated short-circuit breaking current		time	twenty-one
fifteen	Rated short-circuit duration		S	four
sixteen	Closing time (at rated operating voltage)		S	��0.15
seventeen	Opening time (at rated operating voltage)		S	��0.06
eighteen	Rated operating sequence			Min-03s - Combination and Separation -180s - combined and separated
nineteen	Rated opening and closing current of a single capacitor bank		A	four hundred
twenty	Annual gas leakage rate		%/Year	��1
twenty-one	Moisture content of sulfur hexafluoride gas (at 20 ��)		uL/L	��150×10��6
twenty-two	Rated operating voltage for CT10-A spring operated mechanism			AC/DC:220V/110V

	Energy storage motor voltage		V	AC/DC:110/220/380
twenty-three	Weight of sulfur hexafluoride gas		Kg	six
twenty-four	Weight of circuit breaker (including operating mechanism)		kg	one thousand

LW16-40.5 sulfur hexafluoride circuit breaker

[SF6 gas circuit breaker]LW8A-40.5 outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:35:04

The LW8A-40.5 outdoor high-voltage sulfur hexafluoride circuit breaker is a three-phase AC 50Hz outdoor high-voltage electrical equipment; Suitable for control and protection of 40.5kV power transmission and distribution systems; It can also be used for connecting circuit breakers and opening and closing capacitor banks; And it can be equipped with a current transformer for measurement and protection purposes. LW8-40.5 circuit breaker is equipped with CT14 spring operated mechanism. The circuit breaker complies with the requirements of the national standard GB1984-1989 "AC High Voltage Circuit Breaker" and the International Electrotechnical Commission standard IEC60056:1987 "High Voltage AC Circuit Breaker". The main characteristics of a circuit breaker are excellent breaking performance, using a compressed air arc extinguishing chamber, short arc ignition time, long electrical life, and continuous breaking of 25 kA for 20 times without maintenance or replacement of sulfur hexafluoride gas at rated voltage; Reliable insulation, high mechanical reliability, strong closing ability, and the ability to operate frequently; Switching capacitor bank current of 400A without reignition; Cut the empty long line for 25 and 50 kilometers without reignition; Simple structure, small size, and long maintenance cycle.

2. Environmental conditions for use:
Altitude: not exceeding 2500; Rice; Plateau type 4000 meters; Environmental temperature: -30 �� -+40 �� (special requirement -40 �� -+40 ��); Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90% (25 ��); Wind speed: not exceeding 35 meters per second; The pollution level is level III; The porcelain sleeve has a creepage distance of 1050mm (1320mm) (nominal creepage distance not less than 25mm/kV). Sunshine: 0.1w/cm2; Ice cover: 10mm (MAX) Earthquake conditions: vertical acceleration of 0.3g; horizontal acceleration of 0.15g (MAX) in environments without flammable substances, explosion hazards, chemical corrosion, and severe vibrations.

Main technical parameters of LW8A-40.5 outdoor high-voltage sulfur hexafluoride circuit breaker

serial number	Name		unit	Data
one	rated voltage		kV	forty point five
two	maximum voltage		kV	forty point five
three	Rated Absolute Edge level	Lightning impulse withstand voltage (full wave peak value)	kV	200 */215 (fracture) Note: Standardized 185 kV
		Power frequency withstand voltage (1 minute)	kV	95/118 (fracture surface)
four	rated current		A	1600/2000		1600/2000/2500/3150
five	mechanical life		time	five thousand
six	Rated pressure of SF6 (gauge pressure at 20 ��)		MPa	zero point four zero		zero point five zero
seven	Locking pressure (gauge pressure at 20 ��)		MPa	zero point three		zero point four zero
eight	Maximum operating environment temperature		��	-40		-30
nine	Rated short-circuit breaking current		kA	twenty	twenty-five	twenty-five	thirty-one point five
ten	Rated short-circuit closing current (peak)		kA	fifty	sixty-three	sixty-three	eighty
eleven	Rated short-time withstand current (thermal stability current)		kA	twenty	twenty-five	twenty-five	thirty-one point five
twelve	Rated peak withstand current (dynamic stability current)		kA	fifty	sixty-three	sixty-three	eighty
thirteen	Rated out of step breaking current		kA	five	six point three	six point three	eight
fourteen	Accumulated breaking times under rated short-circuit breaking current		time	twenty
fifteen	Rated short-circuit duration		S	four
sixteen	Closing time (at rated operating voltage)		S	��0.1
seventeen	Opening time (at rated operating voltage)		S	��0.06
eighteen	Rated operating sequence			Min-03s - Combination and Separation -180s - combined and separated
nineteen	Rated opening and closing current of a single capacitor bank		A	four hundred
twenty	Annual gas leakage rate		%/Year	��1
twenty-one	Moisture content of sulfur hexafluoride gas (at 20 ��)		uL/L	��150
twenty-two	Rated operating voltage for CT14 type spring operated mechanism			AC/DC:380/220V/110V
	Voltage of closing coil and opening coil		V	Communication: 220 380 DC: 48 110 220
	Energy storage motor voltage		V	Communication: 220 DC: 220/110
twenty-three	Weight of sulfur hexafluoride gas		Kg	five
twenty-four	Weight of circuit breaker (including operating mechanism)		kg	one thousand

LW8A-40.5 Outdoor High Voltage Sulfur Hexafluoride Circuit Breaker

[SF6 gas circuit breaker]LW34-40.5 series outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:34:55

The LW34-40.5 series outdoor high-voltage sulfur hexafluoride circuit breaker has good breaking performance and adopts a pressure type arc extinguishing chamber. It has a long electrical life and can continuously break a short-circuit current of 40kA for 21 times at rated voltage without maintenance or replacement of sulfur hexafluoride gas. The mechanism has high reliability and a mechanical life of over 3000 times. It can be operated frequently and can be equipped with 12 current transformers for users to choose from This product adopts the newly opened MKZ SF6 pointer density gauge, and the pressure gauge reading is not affected by temperature changes, making it easy to use

[SF6 gas circuit breaker]LW3-12 series sulfur hexafluoride circuit breaker

2026-6-10 20:34:47

1. Overview
The LW3-12 series sulfur hexafluoride circuit breaker is a column mounted circuit breaker that uses SF6 gas as the arc extinguishing and insulation medium. It is currently a replacement product promoted and used in urban and rural power grids. Its excellent performance price ratio is incomparable to other 12KV outdoor circuit breakers.
The LW3-12 series sulfur hexafluoride circuit breaker is developed by our company in strict accordance with GB1984-89 "AC High Voltage Circuit Breaker". Its electrical and mechanical performance meets the requirements of DL402-91 "Technical Conditions for Ordering AC High Voltage Circuit Breakers" and GB11022-89 "General Technical Conditions for High Voltage Switchgear". Suitable for use as control and protection switches in small and medium-sized power stations and branch lines in power systems with a rated voltage of 12KV and a rated frequency of 50Hz.
2. Characteristics
Three level shared box, simple structure, compact layout
The power output is rotary, with good sealing effect.
The small mass of motion within the body reduces operational effort and improves mechanical lifespan.
The application of rotating arc technology has improved arc extinguishing efficiency and electrical lifespan.
The independence of the ontology structure can lead to products with different performance and installation methods.
Compared with vacuum and oil circuit breakers, it has significant advantages in structure, weight, safety, electrical strength, electrical life, maintenance, and cost.
Special arrangements and configurations of different transformer ratios for protection and measurement transformers can be made according to user needs.

3. Main technical parameters of LW3-12 series sulfur hexafluoride circuit breaker

serial number	Project Name			parameter				remark
one	Rated voltage (KV)			twelve
two	Rated current (A)			four hundred		six hundred and thirty
three	Rated frequency (Hz)			fifty
four	Rated insulation level (KV)	1-minute power frequency withstand voltage (effective value)	dry-type	42 (to ground, between levels, between fractures)				The circuit breaker is filled with 0.25MPa sulfur hexafluoride gas (20 ��)
			wet type	34 (for ground, inter level, and inter fracture)
		Lightning impulse durability withstand voltage (peak value)		75 (for ground, inter level, and inter fracture)
five	Rated line voltage of insulation level under zero gauge pressure (KV)			115 (conductive circuit to ground)
six	Rated short-time withstand current (KA)			8 125		16 20
seven	Rated peak withstand current (KA)			twenty	three hundred and fifteen	forty	fifty
eight	Rated short-circuit duration (s)			four
nine	Rated short-circuit breaking current (KA)			eight	one hundred and twenty-five	sixteen
ten	Rated breaking current of asynchronous grounding (KA)			seven	one hundred and nine	one hundred and thirty-nine	one hundred and seventy-three
eleven	Rated short-circuit closing current (peak) (KA)			twenty	three hundred and twenty-five	forty	fifty
twelve	Number of consecutive rated short-circuit current disconnections (times)			sixteen
thirteen	Breaking current under zero gauge pressure (A)			four hundred			six hundred and thirty
fourteen	Rated operating sequence		Type I	Fen-180S-HeFen-180S-HeFen
			II. Type III	Fen-0.5S-180S-Fen
fifteen	Recloser no current time (S)			zero point five
sixteen	Unified time (S)			��0.08
seventeen	Rated pressure of sulfur hexafluoride gas (MPa)			zero point three five				20��
eighteen	Minimum working pressure of sulfur hexafluoride gas (MPa)			zero point two five				20��
nineteen	Closing time (S)		Type I	��0.06
			II. Type III	��0.08
twenty	Opening time (S)		Type I	��0.06
			II. Type III	��0.04
twenty-one	Mechanical durability (times)			three hundred
twenty-two	Moisture content of sulfur hexafluoride gas in circuit breaker (ppm)			�� 150/300/factory/operation				volume ratio
twenty-three	Annual gas leakage rate of sulfur hexafluoride			��1%
twenty-four	Rated voltage of opening and closing coils and energy storage motors (V)			a��c�� 220 or d, c, 220				User confirmed
twenty-five	Current ratio of current transformer (A/A)			200/5�� 400/5�� 600/5 (regular)				User confirmed
twenty-six	Noise level (dB)			��110
twenty-seven	Weight of sulfur hexafluoride gas used for each disconnector (Kg)							twelve
twenty-eight	Total weight of circuit breaker (Kg)		Type I	one hundred and forty
			II. Type III	150, 160
twenty-nine	External dimensions, (L × D × H)		Level III pollution	1100×780×620				Including institutions

4�� Usage environment
[1] Altitude: �� 1000m.
[2] Environmental temperature: -40 �� to+40 ��.
[3] Pollution level: Level III and IV (25mm/kV, 31mm/kV).
[4] Earthquake intensity: not exceeding 8 degrees.
[5] Wind pressure: not exceeding 700Pa (equivalent to 34m/s).
[6] Installation location: A place without fire, explosion hazards, serious pollution, chemical corrosion, and severe vibration.

5�� LW3-12 series sulfur hexafluoride circuit breaker appearance and installation dimensions

LW3-12 series sulfur hexafluoride circuit breaker

[SF6 gas circuit breaker]LW36-126 Outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:34:38

The LW36-126 outdoor self powered high-voltage sulfur hexafluoride circuit breaker is suitable for use in AC 50Hz, 110kV power systems. It can be used as a control and protection equipment for power systems, as well as as as a contact circuit breaker. This product was awarded the 2001 National Economic and Trade Commission Key New Product Recommendation Certificate.

Main technical characteristics of LW36-126 outdoor high-voltage sulfur hexafluoride circuit breaker

1. The circuit breaker adopts the principle of self extinguishing arc, with strong breaking capacity, and can break up to 20 times at full capacity;
2. Equipped with a new type of highly reliable spring operated mechanism, the mechanical reliability can reach 60000 times;
3. Equipped with CT24 or new spring mechanism, high mechanical reliability and low maintenance workload;
4. High insulation level, able to meet both national and IEC standards simultaneously;
5. Thick steel plate integral frame with high seismic resistance.

Main technical parameters of LW36-126 outdoor high-voltage sulfur hexafluoride circuit breaker:

serial number	project	unit	Technical Parameters
one	altitude	m	1000��3000��
two	ambient temperature	��	-25��+40
three	rated voltage	kV	one hundred and twenty-six
four	rated current	A	2500 3150
five	rated frequency	Hz	fifty
six	Rated short-circuit breaking current	kA	31.5 40
seven	Rated short-circuit closing current	kA	80 100
eight	Rated short-time withstand current	kA	31.5 40
nine	Rated peak withstand current	kA	80 100
ten	Rated short-time power frequency withstand voltage	kV	Ground: 230 Between fracture surfaces: 230+73*
eleven	Rated lightning impulse withstand voltage	kV	Ground: 550 Between fracture: 550+103*
twelve	Rated short-circuit current duration	s	four
thirteen	Rated out of step breaking current	A	8 10
fourteen	Near area fault breaking current		90% 75%
fifteen	Rated line charging switching current	A	thirty-one point five
sixteen	Rated operating sequence		O-0.3s-CO-180s-CO
seventeen	SF`_six`Gas pressure (20 �� gauge pressure)	MPa	zero point six
eighteen	mechanical life	time	six thousand
nineteen	Control circuit voltage	V	DC110 or 220

LW36-126 Outdoor High Voltage Sulfur Hexafluoride Circuit Breaker

[SF6 gas circuit breaker]LW3-12I,II outdoor high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:34:29

LW3-12 Type I and II Outdoor High Voltage Sulfur Hexafluoride Circuit Breaker is a new type of outdoor high voltage circuit breaker that uses SF6 gas as the insulation and arc extinguishing medium. The arc extinguishing chamber adopts the principle of arc rotation, and the circuit breaker and operating mechanism are an integral structure. Compared with other 10kV outdoor circuit breakers, this product has significant advantages such as simple structure, reliable arc extinguishing and insulation performance, low operating power, high rated parameters, long electrical life and non maintenance cycle.

operating mechanism
The products are divided into two types: Type I and Type II. The Type I circuit breaker is equipped with a manual energy storage spring operating mechanism, and the A-phase and C-phase are equipped with 3-level current transformers for protection inside the body. It has three functions: manual disconnection, manual full closing, and automatic tripping and disconnection for overcurrent (or short circuit).
Type II circuit breaker electric energy storage spring operating mechanism has multiple functions such as electric energy storage, closing, opening, manual energy storage, closing and opening, and automatic tripping of overcurrent (or short circuit) (achieved by internal or external current transformers). It can not only achieve manual on-site operation but also remote control and automatic reclosing operation.

Technical parameters of LW3-12I, II type outdoor high-voltage sulfur hexafluoride circuit breaker

rated voltage	12kV	rated current	630A
Rated short-time withstand current	12.5kA,16kA	mechanical life	2000 times
Rated peak withstand current	31.5kA,50kA	Rated short-circuit breaking current	12.5kA,16kA
Number of disconnections under rated short-circuit current	20 Times	Rated working pressure	0.35Mpa

2. Usage environment
1. Environmental temperature: upper limit+40 ��, lower limit -30 ��
2. Altitude: not exceeding 3000 meters.
3. The wind pressure shall not exceed 700Pa.
4. Earthquake intensity: not exceeding 8 degrees
5. Installation site: There should be no fire, explosion hazard, chemical corrosion, or severe vibration.
6. Pollution level: Class III, Class IV
3. Product model
LW3-10��/400.630-6.3.8.12.5
The meanings represented by each section are as follows:

Technical Specifications

serial number	name		Unit	Data
one	rated voltage		KV	ten
two	Maximum operating voltage		KV	twelve
three	Rated insulation level (when the circuit breaker is filled with SF6 gas at 0.25MPa). At 20 ��)	Lightning impulse withstand full wave	KV	seventy-five
		Power frequency withstand voltage for one minute		forty-two
		Rain test with pressure resistance		thirty-four
		Reverse impact withstand voltage		eighty-five
four	Insulation current at zero gauge pressure	Power frequency withstand voltage for one minute	KV	thirty
		Reverse withstand voltage for one minute		thirty
		Maximum phase voltage for five minutes		nine
five	rated current		A	four hundred point six three zero
six	Rated short-circuit breaking current		KA	six point three	eight	twelve point five	sixteen
seven	Open and close the cross phase ground reclosing circuit		KA	five point five	seven point one	ten point nine	fourteen
eight	Breaking current under zero gauge pressure		A	four hundred point six three zero
nine	Rated operating sequence	Type I		Split -180s Split -180S Split
		Type II and III		Split -180s Split -180S Split
ten	Rated closing current (peak value)		KA	sixteen		twenty	thirty-one point five
eleven	Rated dynamic stability current (peak value)		KA	sixteen		twenty	thirty-one point five
twelve	Rated thermal stability current		KA	six point three		eight	twelve point five
thirteen	Rated thermal stability time		S	four
fourteen	Just closed speed		M/S	2.6±0.2
fifteen	instantaneous speed		M/S	2.6±0.2
sixteen	Inherent closing time	Type II and III	S	��0.06
seventeen	Inherent opening time	Type I	S	��0.06
		Type II and III		��0.04
eighteen	Rated working pressure		MPa	0.35��20�棩
nineteen	Minimum working pressure		MPa	0.25��20�棩
twenty	Annual gas leakage rate		%	less than 1
twenty-one	Mechanical stability operation		time	six thousand
twenty-two	weight	Type I	Kg	one hundred and twenty-two
		Type II		one hundred and thirty
		Type III		one hundred and thirty-two
twenty-three	Moisture content of SF6 gas		PPM	��150

LW3-12I, Type II Outdoor High Voltage Sulfur Hexafluoride Circuit Breaker

[SF6 gas circuit breaker]LW8-40.5 Outdoor High Voltage SF6 Circuit Breaker

2026-6-10 20:34:20

The LW8-40.5 flash sulfur circuit breaker is an outdoor high-voltage switchgear suitable for three-phase AC 50Hz, 35kV power systems. It plays a control and protection role and can be used to switch rated current and fault current. It can also be used for frequent operation, capacitor level, and as a connecting circuit breaker. This circuit breaker is equipped with a CT14 type spring operated mechanism.

Technical parameters of LW8-40.5 outdoor high-voltage SF6 circuit breaker

serial number	Name		unit	Data
one	rated voltage		kV	forty point five
two	maximum voltage		kV	forty point five
three	Rated Absolute Edge level	Lightning impulse withstand voltage (full wave peak value)	kV	200 */215 (fracture) Note: Standardized 185 kV
		Power frequency withstand voltage (1 minute)	kV	95/118 (fracture surface)
four	rated current		A	1600/2000		1600/2000/2500/3150
five	mechanical life		time	five thousand
six	Rated pressure of SF6 (gauge pressure at 20 ��)		MPa	zero point four zero		zero point five zero
seven	Locking pressure (gauge pressure at 20 ��)		MPa	zero point three		zero point four zero
eight	Maximum operating environment temperature		��	-40		-30
nine	Rated short-circuit breaking current		kA	twenty	twenty-five	twenty-five	thirty-one point five
ten	Rated short-circuit closing current (peak)		kA	fifty	sixty-three	sixty-three	eighty
eleven	Rated short-time withstand current (thermal stability current)		kA	twenty	twenty-five	twenty-five	thirty-one point five
twelve	Rated peak withstand current (dynamic stability current)		kA	fifty	sixty-three	sixty-three	eighty
thirteen	Rated out of step breaking current		kA	five	six point three	six point three	eight
fourteen	Accumulated breaking times under rated short-circuit breaking current		time	twenty
fifteen	Rated short-circuit duration		S	four
sixteen	Closing time (at rated operating voltage)		S	��0.1
seventeen	Opening time (at rated operating voltage)		S	��0.06
eighteen	Rated operating sequence			Min-03s - Combination and Separation -180s - combined and separated
nineteen	Rated opening and closing current of a single capacitor bank		A	four hundred
twenty	Annual gas leakage rate		%/Year	��1
twenty-one	Moisture content of sulfur hexafluoride gas (at 20 ��)		uL/L	��150
twenty-two	Rated operating voltage for CT14 type spring operated mechanism			AC/DC:380/220V/110V
	Voltage of closing coil and opening coil		V	Communication: 220 380 DC: 48 110 220
	Energy storage motor voltage		V	Communication: 220 DC: 220/110
twenty-three	Weight of sulfur hexafluoride gas		Kg	eight
twenty-four	Weight of circuit breaker (including operating mechanism)		kg	one thousand and four hundred

Rated voltage 126kV	Rated current 3150A
Rated short-circuit breaking current 40kA	Rated short-circuit breaking current, breaking times 12 times
Mechanical lifespan (times) 3000 times	SF6 annual leakage rate �� 1%
SF6 gas weight 10kg	Net weight 1800kg

LW8-40.5 Outdoor High Voltage SF6 Circuit Breaker

[SF6 gas circuit breaker]Elevated porcelain column outdoor AC high-voltage sulfur hexafluoride circuit breaker

2026-6-10 20:34:12

LW38-40.5 (G) - CJ elevated porcelain column outdoor AC high-voltage sulfur hexafluoride circuit breaker (hereinafter referred to as the circuit breaker) is a control and protection equipment for outdoor installation, three-phase, AC 40.5kv level high-voltage transmission and transformation systems using SF6 gas as arc extinguishing and insulation medium. It can be used to split and close rated current and fault current, switch capacitor groups and conversion lines, especially suitable for frequent operation, and can also be used as a circuit breaker for interconnection.

This circuit breaker complies with the requirements of IEC "High Voltage AC Circuit Breakers" and GB1984 "High Voltage AC Circuit Breakers".

LW38-40.5 (G) - CJ Elevated Ceramic Column Outdoor AC High Voltage SF6 Circuit Breaker Model Meaning

Environmental conditions for product use
a. Environmental temperature:
Maximum temperature+40 ��
Minimum temperature -30 ��
b. Relative humidity:
Daily average relative humidity �� 90%
Monthly average relative humidity �� 95%
c. Altitude:
Normal operating conditions: altitude not exceeding 1000m (referred to as flat prototype);
Special usage conditions: altitude not exceeding 3000m (referred to as high prototype);
d. The wind speed does not exceed 34m/s (corresponding to 700Pa on the surface of the cylinder);
e. The seismic intensity shall not exceed 8 degrees (horizontal acceleration 0.25g, vertical acceleration 0.125g);
f. Air pollution level: Level IV; Minimum nominal creepage distance: 31mm/kV

LW38-40.5 (G) - CJ Elevated Ceramic Column Outdoor AC High Voltage Sulfur Hexafluoride Circuit Breaker Main Technical Parameters
1. Main technical parameters are shown in Table 1

Table 2 Main Technical Parameters of Institutions

LW38-40.5 Elevated Ceramic Column SF6 Circuit Breaker with Built in Current Transformer Dimensions (Stainless Steel Shell)

Structure Introduction
3.1 SF6 gas is used as insulation and medium, with superior breaking and insulation performance, and no fire hazard.
3.2 The arc is extinguished using a compressed air method, which is reliable in breaking and has a large breaking capacity.
3.3 The circuit breaker adopts a compact CT14-CT35 spring operated mechanism, achieving the miniaturization of 40.5kV vacuum circuit breaker products;
3.4 The circuit breaker adopts an elevated porcelain column structure, which is compact and beautiful. There are few insulation components and sealing surfaces, making it easy to control the amount of water and leakage rate.
3.5 Adopting overall packaging transportation, easy installation and operation, and low maintenance workload.
Appearance and installation dimensions of circuit breakers
4.1 Appearance and Installation Foundation Dimensions
4.2 The installation foundation of the circuit breaker shall withstand a vertical impact force of not less than 35kN
Ordering Instructions
6.1 When placing an order, please indicate the model, name, rated voltage, rated current, and rated short-circuit breaking current of the circuit breaker, as well as the model, name, energy storage motor, and opening/closing coil of the spring mechanism used
Rated voltage and rated current.
6.2 This circuit breaker can be equipped with one set of current transformers per phase, with a maximum of four secondary transformers per set. The installation of the transformers is shown in Figure 1 or can be selected by the user at their own location. Please specify the installation location when placing an order
Order the model, quantity, transformation ratio, accuracy level, and installation method of the current transformer.
6.3 If the user has other requirements, please contact our company directly.