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VACUUM CIRCUIT BREAKER

VACUUM CIRCUIT BREAKER .
1)TECHNICAL SPECIFICATIONS:
•   Rated voltage : 7.2KV
•   Rated normal current: 400A
•   Rated frequency : 50/60Hz
•   Rated short-circuit current : Isc 8KA
•   Rated short-time withstand current: 8KA /3s
•   Rated short circuit breaking capacity : 100MVA
•   Rated short – circuit making capacity:
2.5*Isc(50Hz) / 2.6*Isc(60Hz)
•   Rated breaking time :3 cycle
•   Rated withstand voltage :
•   Power frequency ( 1min ) - 20KV
•   Impulse ( 1.2 x 50us)         - 60KV
Rated operating sequence : O-0.3s-CO-15s-CO

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