Power Systems Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency? 50% 86%% 90% 75% 50% 86%% 90% 75% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Advantages of shunt compensation is/are It requires less maintanance smooth voltage regulation is possible by controlling excitation All of these single unit can be used as both capacitance and inductor by adjusting the excitation It requires less maintanance smooth voltage regulation is possible by controlling excitation All of these single unit can be used as both capacitance and inductor by adjusting the excitation ANSWER DOWNLOAD EXAMIANS APP
Power Systems Ferranti effect can be compensated by which of the following shunt capacitor series capacitor both 1 and 2 shunt reactor shunt capacitor series capacitor both 1 and 2 shunt reactor ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 1- phase transmission line operating at 30 kV has radius of 1 cm and distance between conductors is 0.5 m. Assume m = δ =1, g = 21 kV/cm and frequency f = 50 Hz. Find the critical disruptive voltage? 82.15 kV/phase 41.075 kV/phase 17.32 kV/phase 34.64 kV/phase 82.15 kV/phase 41.075 kV/phase 17.32 kV/phase 34.64 kV/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is j6 pu j1 pu j9 pu j3 pu j6 pu j1 pu j9 pu j3 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive sequence reactance will be equal to negative sequence if the equipment is none of these. transformer and transmission lines. generator. motor. none of these. transformer and transmission lines. generator. motor. ANSWER DOWNLOAD EXAMIANS APP
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