● Brief Description
Circuit breaker is used for making and breaking normal current, fault current and switching lines to realize the control and protection of power system.
Each pole of LW10B-252 circuit breaker has one break without parallel capacitor and each pole of LW10B-363 circuit breaker has double breaks with parallel capacitors. For both of products, each pole is equipped with a hydraulic operation mechanism, which can make single-pole operation and/or three-pole-gang operation.
Complete and rigorous type tests have been performed on the series products, the type test certificates were issued by Italy CESI Certification Center in 1998.
● Main Features
1 Excellent breaking capacity with advanced construction.
2 Valve system of hydraulic mechanism can effectively prevent oil leak, and each pole is equipped with density relay to monitor SF6 leakage.
3 Good insulation performance.
4 The components and spare parts are highly interchangeable with other products of PINGGAO, experienced manufacturing technology, easy to maintain on site.
●Technical Parameters
Specifications
|
Unit
|
Value
|
Rated voltage
|
kV
|
252
|
363
|
Rated current
|
A
|
3150/4000
|
Rated frequency
|
Hz
|
50/60
|
Rated short-time withstand current (r.m.s)
|
kA
|
50
|
63
|
Rated peak withstand current
|
kA
|
125
|
160
|
1min power frequency withstand voltage (r.m.s)
|
To earth/Between phases
|
kV
|
460
|
510
|
Across isolating distance
|
kV
|
460(+145)
|
510(+210)
|
Lightning impulse withstand voltage (peak)
|
To earth/Between phases
|
kV
|
1050
|
1175
|
Across isolating distance
|
kV
|
1050(+200)
|
1175(+295)
|
Rated SF6 gas pressure(20℃)
|
MPa
|
0.4/0.6
|
Rated SF6 annual leakage
|
%
|
≤0.5
|