Description
Skype: liujingmec
liujing@mec.com.cn
LW35-72.5/126/145/252 SF6 circuit breaker is designed with self-energizing theory that the arc generated in the interrupter is distinguished at a specified time with a part of energy from the arc itself.
The circuit breaker is designed and manufactured in good accordance with IEC standards.
LW35-72.5/126/145 circuit breaker is either three-phase gang operation with a spring mechanism or single-phase operation with three spring mechanisms.
LW35-252 series circuit breaker is equipped with three spring mechanisms to realize single-phase operation or three-phase electrical gang operation.
1. Simple structure, high rated parameter
2. Spring mechanism, compactness
3. Easy installation, low noise, high reliability
4. Double sealing system is adopted to guarantee minimum SF6 annual leakage
5. Mechanical and electrical anti-pumping function.
6. Reasonable design, compact structure, no oil-leakage, maintenance-free, 10000 times mechanical endurance.
|
Item
|
Unit
|
LW35-72.5
|
LW35-126
|
LW35-145
|
LW35-252
|
|
Rated voltage
|
KV
|
72.5
|
126
|
145
|
252
|
|
Rated current
|
A
|
3150
|
4000
|
|
Rated frequency
|
Hz
|
50
|
|
Rated short circuit breaking current
|
kA
|
40
|
50
|
|
Rated short time withstand current (3s)
|
kA
|
40
|
50
|
|
Short line fault breaking current
|
kA
|
30/36
|
45/37.5
|
|
Rated peak withstand current
|
kA
|
100
|
125
|
|
Rated out-of-phase breaking current
|
kA
|
10
|
12.5
|
|
Rated line charging breaking current
|
A
|
10
|
31.5
|
50
|
160
|
|
Rated SF6 gas pressure (at 20℃)
|
Mpa
|
0.4
|
0.5
|
0.6
|
|
Main loop resistance
|
μΩ
|
≤40
|
≤45
|
≤60
|
|
Operation sequence
|
|
O-0.3s-CO-180s-CO or O-0.3s-CO-15s-CO
|
|
Mechanical endurance
|
Times
|
10000
|
|
SF6 gas leakage（rate per year）
|
%
|
≤1%
|
|
Moisture content (V/V)
|
PPm
|
150
|
|
Creepage
|
Across the open contacts
|
mm
|
2300
|
3950
|
3950
|
9400
|
|
To earth
|
mm
|
2300
|
3950
|
3950
|
7320
|
LW10B column type SF6 circuit breaker including 252kV, 363kV and 550kV products, are used for making and breaking normal current, fault current and changing over of circuit, so as to realize the control and protection of power system. Please contact us! Email: liujing@mec.com.cn
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Business Type:Manufacturer, Trading Company
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