Power Systems In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)? 1 × 106 kV / sec. 2 × 106 kV / sec. 3.5 × 106 kV / sec. 3 × 106 kV / sec. 1 × 106 kV / sec. 2 × 106 kV / sec. 3.5 × 106 kV / sec. 3 × 106 kV / sec. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the methods of improving transient stability? Fast acting governing system Dynamic breaking Fast acting excitation control All of these Fast acting governing system Dynamic breaking Fast acting excitation control All of these ANSWER DOWNLOAD EXAMIANS APP
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. 50 kA. 45 kA. 55 kA. 35 kA. 50 kA. 45 kA. 55 kA. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base? 0.2 pu 0.5 pu 0.1 pu 0.4 pu 0.2 pu 0.5 pu 0.1 pu 0.4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relays are used in protection of medium transmission lines? any of the above Impedance relays Mho relays Admittance relays any of the above Impedance relays Mho relays Admittance relays ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is an impulse turbine Pelton turbine. Kaplan turbine. None of above. Francis turbine. Pelton turbine. Kaplan turbine. None of above. Francis turbine. ANSWER DOWNLOAD EXAMIANS APP
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