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Vacuum Circuit Breaker Technical Data

Description Unit Value
Rated Voltage kV 27,5
Rated Frequency Hz 50
Rated Current A 630; 1250
Rated Short Time Current kА 20
Maximum Short-Circuit Current s 3
Rated Peak Withstand Current kА 50
Rated Impulse Withstand Voltage kА 170
Rated Withstand Power Frequency Voltage kV 70
Approx. Closing Time ms 65
Arcing Time ms <17
Approx. Opening Time ms 70
Rated Short-Circuit Breaking Current kА 20
Rated Short-Circuit Making Current kА 50
Rated Cable Charge Breaking Current A 50
Operating сycles:
- vacuum tube at rated current
- vacuum tube at rated short-circuit breaking current
- circui-breaker mechanism		 -  15,000 
100
10,000