Copyright ® Henan pinggao Electric Co.,Ltd 豫ICP备05010380号
Service
Company name: henan pinggao electric co. LTD
Address: Henan province of pingdingshan city
south ring road 22
Mail editor: 467000
E - mail : pinggao@pinggao.esgcc.com.cn
400-6700-312
If you need to consult other business, you can call the hotline directly.
General department: +86-375-3804029
Securities department: +86-375-3804064
Sales: +86-375-3803888
Customer service center: 400-6700-312
PRODUCT
PRODUCTS
Brief Description
LW55 Series of SF6 Dead Tank Circuit Breaker, including LW55-252, LW55-363, LW55-550 and LW55-800, are used for making and breaking normal current, fault current and switching lines to realize the control, measurement and protection of power system.
With the advantages of excellent breaking performance, reliable mechanical properties, advanced tightness technology, high design parameters, the whole structure of circuit breaker is compact, with stable and reliable performance and long endurance.
Main Features
1 The circuit breaker is of strong breaking capacity, long electrical endurance.
2 LW55 Series have excellent antiseismic and antipollution capacities, which make it suitable for those polluted places and higher elevation areas.
3 The oil pressure in hydraulic mechanism is automatic controlled and it can’t be affected by the temperature.
4 There are almost no external pipe for this new type of hydraulic operating mechanism, the possibility of oil leakage is reduced.
Technical Parameters
|
Specifications
|
Unit
|
Value
|
||||
|
Rated voltage
|
kV
|
252
|
363
|
550
|
800
|
|
|
Rated current
|
A
|
4000
|
5000
|
|||
|
Rated frequency
|
Hz
|
50/60
|
||||
|
Rated short-time withstand current (r.m.s)
|
kA
|
50
|
||||
|
Rated peak withstand current
|
kA
|
125
|
||||
|
1min power frequency withstand voltage (r.m.s)
|
To earth/Between phases
|
kV
|
460
|
510
|
740
|
960
|
|
Across isolating distance
|
kV
|
460 +(154)
|
510 +(210)
|
740 +(315)
|
960 +(460)
|
|
|
Lightning impulse withstand voltage (peak)
|
To earth/Between phases
|
kV
|
1050
|
1175
|
1675
|
2100
|
|
Across isolating distance
|
kV
|
1050 +(200)
|
1175 +(295)
|
1675 +(450)
|
2100 +(650)
|
|
|
Rated operating impulse withstand voltage (peak)
|
To earth/Between phases
|
kV
|
|
950
|
1300
|
1550
|
|
Across isolating distance
|
kV
|
|
850 +(295)
|
1175 +(450)
|
1300 +(650)
|
|
|
Rated SF6 gas pressure（20℃）
|
MPa
|
0.6
|
||||
|
Rated SF6 annual leakage
|
%
|
≤0.5
|
||||