Specifications:
- Rated voltage (kV): 20
- Rated current at 50 / 60 Hz (A): 6300 / 5700*
- Rated breaking current at 50 / 60 Hz (kA): 90 / 75
- Opening time (s), not more than: 0.15
- Total break time (s), not more than: 0.2
- Closing time (s), not more than: 0.75
- Mechanical lifetime: 3000 CO cycles
* when using forced air cooling of the main circuit by air fans, the maximum continuous current is 9500/8600 А
Design
Three poles of the circuit-breaker are mounted on the frame and divided with interpole partitions. The circuit-breaker driving mechanism is connected with the drive via the tie-rod. The circuit-breaker pole consists of the following main parts: supporting insulators, tanks, interpole partition and oil catchers.
10 kV Vacuum Circuit-Breakers