SSC JE EE Score Booster Quiz 4 (Power System)

The rating of a circuit breaker is usually determined based on

The pick-up current of a relay is 7.5 A and the fault current in relay is 30 A. Its plug-setting multiplier (P.S.M) is

In a short-circuit test on a circuit breaker, the following readings were obtained on single frequency transient:

Time to reach the peak re-striking voltage = 50 µsec

Peak re-striking voltage = 100 kV

The average RRRV is

If the inductance and capacitance of a system are 1 H and 0.01 µF and the instantaneous value of interrupted current is 10 A, the voltage across circuit breaker contacts is