EHV Gas Insulated Switchgear
Salient Features :
- Only very small space is required as compared to conventional air insulated switchgear
- Modular construction
- Minimum maintenance
- Plug- in type cable terminations
- Hermetically sealed enclosures
- Mechanism is of M2 class
- Hydro spring operating mechanism for circuit breaker
- Each section of SF6 gas is compartmentalized with insulating barrier between enclosures and sealed with O-Rings
- No environmental influences
- Electrical interlocking systems are equipped for the purpose of protecting the operator and safe operation of main circuit
- Gas section of circuit breaker is provided with dual alarm systems
- Gas monitoring is available from the control board easily
- Compatible to remote operation
- Full safety to operator
Technical Parameters :
Description |
245 kV GIS |
420 kV GIS |
Rated voltage
1 min. power frequency withstand voltage
Rated lighting impulse withstand voltage
Rated switching impulse withstand voltage
Rated current
- Busbar
- Line
Rated current frequency
Circuit Breaker
Rated short circuit breaking current
Rated short circuit breaking current
Break time (max)
Type of drive
Opening time
Closing time (max)
First pole to clear factor
Current transformer |
245 kV rms
460 kV rms
1050 kV peak
Not Applicable
3150 A
Up to 2500
50 Hz
50 kA rms
125 kA peak
40 ms
Hydraulic-Spring
30 ms
100 ms
1.3
As per customer requirement |
420 kV rms
520 kV rms
1425 kV peak
1050 kV peak
4000 A
Up to 3150
50 Hz
50 kA rms
125 kA peak
40 ms
Hydraulic-Spring
30 ms
100 ms
1.3
As per customer requirement |
|
Product Range