●Brief Description
GW7 Series disconnector are 3-pole outdoor HV a.c electric devices, including 40.5kV, 72.5kV, 126kV and 145 kV disconnectors, which own 3-pole double-horizontal-break construction, consist of installation base, supporting insulator, rotating insulator, moving contact, fixed contact and earthing switch, etc.
●Main Features
1 Reasonable structure, excellent performance and reliable service;
2 Excellent mechanical properties, small operating force, high reliability, long mechanical endurance;
3 Brilliant anticorrosive capability.
4 Small circuit resistance and good waterproof performance.
●Technical Parameters
Specifications
|
Unit
|
Value
|
Rated voltage
|
kV
|
40.5
|
72.5
|
126
|
145
|
Rated current
|
A
|
630/1250/2000
|
630/1250/2000
|
1600
|
1600/2000
|
Rated frequency
|
Hz
|
50/60
|
Rated short-time withstand current (r.m.s)
|
kA
|
20/25/ 31.5
|
25/31.5/40
|
31.5
|
31.5/40
|
Rated peak withstand current
|
kA
|
50/63/80
|
63/80/100
|
80
|
80/100
|
1min power frequency withstand voltage (r.m.s)
|
To earth/Between phases
|
kV
|
70
|
140
|
230
|
275
|
Across isolating distance
|
kV
|
80
|
160
|
265
|
315
|
Lightning impulse withstand voltage (peak)
|
To earth/Between phases
|
kV
|
170
|
325
|
550
|
650
|
Across isolating distance
|
kV
|
195
|
375
|
630
|
750
|