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? 9.68 msec 1.47 msec 4.68 msec 2.63 msec 9.68 msec 1.47 msec 4.68 msec 2.63 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence, this may either be a medium line or short line this must be a short line this expression is true for any line None of these this may either be a medium line or short line this must be a short line this expression is true for any line None of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of 78% 76% 80% 82% 78% 76% 80% 82% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Condition for zero voltage regulation is cosφ = X/R tanφ = X/R tanφ = R/X cosφ = R/X cosφ = X/R tanφ = X/R tanφ = R/X cosφ = R/X ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal protection switch is used to provide protection against short circuit. overload. over voltage. temperature. short circuit. overload. over voltage. temperature. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The only place where slip ring induction motors used in thermal power plants is coal handling plant. lubrication oil pumps. conveyors. none of above. coal handling plant. lubrication oil pumps. conveyors. none of above. ANSWER DOWNLOAD EXAMIANS APP
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