EHV Live Tank SF6 Circuit Breakers
Salient Features :
- Simplicity, higher reliability and safety of design
- Hybrid interrupter design for 145 kV breaker and improvised puffer type interrupter for 245 kV breaker
- Reduced operating mechanism energy requirement
- Small amount of SF6 gas
- Rotary seals
- Minimum maintenance, servicing and installation time
- Higher mechanical endurance and very low probability of re-striking
- Conform to class M2 & C2
- Compact and reliable hydro-spring mechanism
Technical Parameters :
Description |
145 kV Live Tank SF6 Circuit Breaker |
245 kV Live Tank SF6 Circuit Breaker |
Number of breaks / phase
Type of operation
Operating mechanism
Rated Voltage
Rated normal current
Rated frequency
1 min. power frequency withstand voltage
Lighting Impulse withstand voltage
Rated short circuit breaking capacity
First Pole to clear factor
Operating duty
Rated peak short circuit withstand current
Total break time |
1
3 pole gang operated
Hydro – Spring
145 kV rms
2000 A
50 Hz
275 kV rms
650 kV peak
40 kA rms
1.3
O-0.3sec-CO-3min-CO
100 kA peak
60 ms |
1
3 pole gang operated
Hydro – Spring
245 kV rms
2500 A
50 Hz
460 kV rms
1050 kV peak
40 kA rms
1.3
O-0.3sec-CO-3min-CO
100 kA peak
60 ms |
|
Product Range