Power Systems A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm sinωt? 2.63 msec 1.47 msec 4.68 msec 9.68 msec 2.63 msec 1.47 msec 4.68 msec 9.68 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems The insulation resistance of the 20 km long underground cable is 8 MΩ. Other things being same, the insulation resistance of 10 km long cable will be 16 MΩ 32 MΩ 4 MΩ 8 MΩ 16 MΩ 32 MΩ 4 MΩ 8 MΩ ANSWER DOWNLOAD EXAMIANS APP
Power Systems A sort line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is 0.707 leading 0 leading 0.5 unity 0.707 leading 0 leading 0.5 unity ANSWER DOWNLOAD EXAMIANS APP
Power Systems On what factor does the performance of a circuit breaker depend? None of these. Breaking speed. Critical length of breaking. Both A and C. None of these. Breaking speed. Critical length of breaking. Both A and C. ANSWER DOWNLOAD EXAMIANS APP
Power Systems An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 400/5. The pick up value is 15 A 6.25 A 12.5 A 10 A 15 A 6.25 A 12.5 A 10 A ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero always if both 2 and 3 are satisfied if the mutual couplings between transmission lines are absent if the shunt admittances at the buses are ignored always if both 2 and 3 are satisfied if the mutual couplings between transmission lines are absent if the shunt admittances at the buses are ignored ANSWER DOWNLOAD EXAMIANS APP
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