Power Systems For complete protection of 3-phase system from the short circuit faults minimum number of relays required are three two six one three two six one ANSWER DOWNLOAD EXAMIANS APP
Power Systems At slack bus, which one of the following combinations of variables is not specified? P and Q V and δ P and V Q and V P and Q V and δ P and V Q and V ANSWER DOWNLOAD EXAMIANS APP
Power Systems In case of failure of prime mover of the generator, which type of relay is used? impedance relay reverse power relay offset mho relay distance relays impedance relay reverse power relay offset mho relay distance relays ANSWER DOWNLOAD EXAMIANS APP
Power Systems A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred? LLL LLG LG LL LLL LLG LG LL ANSWER DOWNLOAD EXAMIANS APP
Power Systems Skin effective is more in case of communication lines None of these power lines same in both cases communication lines None of these power lines same in both cases ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead 6.92% -6.92% -10% 10% 6.92% -6.92% -10% 10% ANSWER DOWNLOAD EXAMIANS APP
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