LW25-126 outdoor high voltage porcelain SF6 circuit breaker is an outdoor, three-phase AC 50Hz high voltage electrical equipment. It is primarily used to protect transmission and distribution lines and can also be used as a tie breaker. This circuit breaker features a three-phase mounted on one frame, with no provision for single-phase operation.

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	126
2	Rated Frequency	Hz	50
3	Rated Current	A	2000/3150/4000
4	Rated Short-Circuit Breaking Current	kA	40/31.5
5	Rated Short-Circuit Making Current (Peak)	kA	100/80
6	Rated Peak Withstand Current	kA	100/80
7	Rated Duration of Short-Circuit	s	4
8	Rated Power Frequency Withstand Voltage (Dry Test)	kV	280+85(Across the contact gaps) / 275(To Ground)
9	Creepage Distance Ratio	CM/kV	2.5/3.1
10	Rated Power Frequency Withstand Voltage (Wet Test)	kV	230+85(Across the contact gaps) / 275(To Ground)
11	Rated Lightning Impulse Withstand Voltage	kV	600+100(Across the contact gaps) / 650(To Ground)
12	5-Minute Power Frequency Withstand Voltage	kV	1.3×145√3
13	Closing Time	ms	≤150
14	Opening Time	ms	≤30/≤35
15	Breaking Time	ms	≤60
16	Making Time	ms	40-60
17	No-Simultaneity of Opening Operations of 3-Phase	ms	≤2
18	No-Simultaneity of Closing Operations of 3-Phase	kA	≤4
19	Rated Reclosing Operation		O-0.3s-CO-180s-CO
20	Rated SF6 Gas Pressure	MPa	0.5, 0.4
21	SF6 Gas Alarm/Locking Pressure	MPa	0.45/0.40, 0.35/0.3
22	SF6 Gas Annual Leakage Rate	%	≤0.5
23	Number of Interrupting Chambers per Pole		1
24	Mechanical Endurance	Times	3000
25	Terminal Horizontal Longitudinal Pulling Force	N	1250
26	Terminal Horizontal Transverse Pulling Force	N	750
27	Terminal Vertical Pulling Force	N	1000
28	Main Circuit Resistance		≤45
29	Operating Mechanism		Spring Mechanism
30	SF6 Gas Filling Mass	Kg	6

Operating Environment

No.	Name	Unit Data
1	Altitude	≤1000 meters
2	Average Monthly Humidity	≤90%
3	Maximum Wind Speed	≤35 meters/second
4	Pollution Level	Class III, IV
5	Ambient Temperature	-35°C to 40°C
6	Maximum Daily Temperature Variation	25k
7	Seismic Intensity	8 degrees
8	Maximum Ice Thickness	10mm
9	Maximum Solar Radiation Intensity	1000W/m²
10	Standard Compliance	GB/T1984-2014

Product Advantages

LW25-126 outdoor high voltage porcelain SF6 circuit breaker has many advantages:

Superior Breaking Capability

When interrupting magnetizing current, the overvoltage is less than twice the operating voltage. Additionally, when interrupting charging current, there is no re-striking or re-ignition occurs.

Reliable Insulation

The properties of SF6 gas remain stable over time, protecting the insulating and conductive components from oxidation and ensuring stable temperature operation.

Products Application

LW25-126 outdoor high voltage porcelain SF6 circuit breaker has many advantages:

It is primarily used to protect transmission and distribution lines and can also be used as a tie breaker.

Minimal Maintenance:

The circuit breaker features a modular structure with advanced technology, reduced components, and excellent mechanical performance, and requires almost no maintenance.

Operating Mechanism Principles

LW25-126 Outdoor High Voltage Porcelain SF6 Circuit Breaker manufacturer

1.Opening

LW25-126 Outdoor High Voltage Porcelain SF6 Circuit Breaker factory

2.Closing

Product Outline Drawing

LW25-126 Outdoor High Voltage Porcelain SF6 Circuit Breaker supplier

Compnay profile

Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading manufacturer with over 20 years of experience, specializing in high quality 7 to 40.5kV vacuum circuit breakers, switchgears, and a wide range of electrical products. Our advanced manufacturing process ensures reliable, durable solutions, especially our VTZ series vacuum circuit breakers, which are maintenance-free for up to 20 years. With a team of expert technicians, we excel in R&D, manufacturing, and after-sales service for both high and low voltage equipment, delivering excellence at every stage.

Advanced Manufacturing and Production
We operate one of the most advanced and standardized assembly line manufacturing facilities in the industry, equipped with the latest technology, enabling us to produce a wide range of high quality electrical products with precision and efficiency. Wecomply with GB 1984-2024 and GB/T11022-2020 standards to ensure the highest quality. Our commitment to excellence is reflected in the durability, reliability, and compatibility of our products.

Product Portfolio and Brand Strength
We offer a wide range of products, including indoor and outdoor vacuum circuit breakers, switchgear, low voltage switch equipment, and various electrical accessories. Each product is designed to meet the specific needs of our customers, they can operate stably in urban distribution networks, industrial melting, new energy power generation, rural power supply and other places, and can still maintain excellent reliability even in harsh environments. Our VTZ Series have become important switch equipment in major fields and power systems throughout China, and their reputation for reliability has earned us the trust of customers nationwide.

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