● Brief Description
GW28/29-550 Disconnector, adopting the merits of disconnector from abroad, is developed as a new kind of products with high voltage, high current, high dynamic parameters of the thermal stability. It has passed the tests in KEMA International Electric Experimental Station, Holland.
● Main Features
1 Reasonable new structure, excellent performance and reliable service;
2 Excellent mechanical properties, small operating force, high reliability, long mechanical endurance;
3 More touching points and stronger current-carrying capacity compared with other kind of disconnector;
4 Good sealing measures are taken to avoid the transmission system is damaged by rainwater.
●Technical Parameters
Specifications
|
Unit
|
Value
|
Rated voltage
|
kV
|
550
|
Rated current
|
A
|
4000
|
Rated frequency
|
Hz
|
50/60
|
Rated short-time withstand current (r.m.s)
|
kA
|
63
|
Rated peak withstand current
|
kA
|
160
|
1min power frequency withstand voltage (r.m.s)
|
To earth/Between phases
|
kV
|
680
|
Across isolating distance
|
kV
|
800
|
Lightning impulse withstand voltage (peak)
|
To earth/Between phases
|
kV
|
1550
|
Across isolating distance
|
kV
|
1550(+315)
|