Project Description

  • SF6 Circuit Breaker
  • SF6 Circuit Breaker
  • SF6 Circuit Breaker

110kV, 126kV, 220kV, 252kV SF6 Circuit Breaker

Application environment:

1. Ambient temperature: -40℃–+ 50℃
2. Wind pressure: ≤700 Pa
3. Altitude: ≤3000m
4. Seismic intensity: ≤9 degrees
5. Air polluted degree: level Ⅲ


LW36-145/252 Outdoor self-energy high-voltage SF6 circuit breaker is a three-phase ac 50/60 Hz outdoor high voltage electric equipment with voltage from 110kV to 252kV.
By opening or closing the rated current and fault current and conversion circuit to realizing the protection, control and operation of the power system. The product can open or close circuit and operate the auto reclosing very fast and realize the linkage of 3-phase circuit.
The circuit breaker applies the modern design, and it has many features such as simple construction, less material. It has very high reliability, easy to install, low noise, etc.

Technical Parameter

# Description Unit Technical parameters
1 Rated voltage kV 110, 126, 132, 145, …, 245, 252
2 Rated insulation level See table 2
3 Rated frequency Hz 50/60
4 Rated current A 2500
5 Rated short circuit breaking current kA 40
6 Rated short-time withstand current kA 40
7 Rated peak withstand current kA 100
8 Rated short time continual time s 3
9 Rated peak withstand current kA 100
10 Short-line fault breaking current kA 30/36
11 Rated clearing energized current A 125
12 Rated out-of-phase breaking current kA 10
13 Accumulative opening times of rated short circuit on power flow time 20
14 First pole to clear factor 1.3
15 Pressure of SF6-gas (20℃) MPa See table 3
16 The rated voltage of control circuit and auxiliary circuit See table 4
17 Rated operating sequence open-0.3s-close- open-180s-close- open
18 Mechanical behavior See table 5
19 Major loop resistance μΩ 50
20 Static tension of terminal Longitudinal FshAN 1500
Horizontal FshB N 1000
Vertical direction FtVm N 1250
21 Mechanical endurance of circuit breaker time 5000
22 Leakage rate of SF6-gas in one year ≤1%
23 moisture content of SF6-gas(V/V) ,10 ≤150
24 Stroke of the contact mm 200
25 Contact connection stroke mm 28

Video will be updated soon.