Power Systems A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is 35 kA. 55 kA. 45 kA. 50 kA. 35 kA. 55 kA. 45 kA. 50 kA. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Frequencies must be same in which of the following line to exchange the power from one place to other place ? No need of same frequency for exchange of power Asynchronous line Synchronous line both 1 and 2 No need of same frequency for exchange of power Asynchronous line Synchronous line both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The insulation of modern EHV is designed based on switching voltage. corona. lightning voltage. RI. switching voltage. corona. lightning voltage. RI. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal protection switch is used to provide protection against overload. over voltage. temperature. short circuit. overload. over voltage. temperature. short circuit. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A cable has the following characteristics, L = 0.201 µH/m and C = 196.2 pF/m. The velocity of wave propagation through cable is 0.0312 m/s 159.24 m/s 32 m/s 159.24 m/µs 0.0312 m/s 159.24 m/s 32 m/s 159.24 m/µs ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero? 29.28 kV 30.28 kV 28.28 kV 31.28 kV 29.28 kV 30.28 kV 28.28 kV 31.28 kV ANSWER DOWNLOAD EXAMIANS APP
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