engineering recuitment Indian Coast Guard Yantrik Mock Test 2024 Power Systems Circuit Breakers Ratings of Circuit Breakers
A 50 Hz, 33 kV, 3-phase transformer with earthed neutral has a reactance of 5 Ω per phase and is connected to a bus-bar through a circuit breaker. The distributed capacitance up to circuit breaker between phase and neutral in 0·01 µF. Determine peak re-striking voltage (approximate value) across the contacts of the breaker
1
66 kV
2
39 kV
3
54 kV
4
27 kV