● Brief Description
LW35S-252 Circuit Breaker adopts self-energizing interrupter and CYT hydraulic operating mechanism, which have the advantages of simple structure, stable and reliable performance, etc., to realize three-pole-gang operation. It fills the domestic gap of professional market and meets urgent requirements of power system.
● Main Features
1 The interrupter adopts advanced self-energizing arc-extinguished principle, can make use of the energy generated from arc itself to break fault current, so as to realize a small operating energy with high mechanical reliability.
2 The circuit breaker is equipped with CYT hydraulic operating mechanism, dynamic sealing system adopts advanced Glyd ring, Step seal, etc.,which reduces the leakage and starting friction.
3 The mechanism uses imported control valve, with the advantages of fast operating speed, short opening time, reliable anti-slow-opening function in case of pressure loss.
●Technical Parameters
Specifications
|
Unit
|
Value
|
Rated voltage
|
kV
|
252
|
Rated current
|
A
|
3150/4000
|
Rated frequency
|
Hz
|
50/60
|
Rated short-time withstand current (r.m.s)
|
kA
|
|
Rated peak withstand current
|
kA
|
|
1min power frequency withstand voltage (r.m.s)
|
To earth/Between phases
|
kV
|
460
|
Across isolating distance
|
kV
|
460+(145)
|
Lightning impulse withstand voltage (peak)
|
To earth/Between phases
|
kV
|
1050
|
Across isolating distance
|
kV
|
1050+(200)
|
Rated SF6 gas pressure(20℃)
|
MPa
|
0.6
|
Rated SF6 annual leakage
|
%
|
≤0.5
|