Power Systems Which one of the following relays has the capability of anticipating the possible major fault in a transformer? Buchholz relay Over fluxing relay Over current relay Differential relay Buchholz relay Over fluxing relay Over current relay Differential relay ANSWER DOWNLOAD EXAMIANS APP
Power Systems Stability of a transmission line can be increased by both 1 and 2 series capacitor shunt capacitor shunt reactor both 1 and 2 series capacitor shunt capacitor shunt reactor ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by Zs = 0.2 pu, Zm =0.7 pu Zs = 0.5 pu, Zm =0.6 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.6 pu, Zm =0.5 pu Zs = 0.2 pu, Zm =0.7 pu Zs = 0.5 pu, Zm =0.6 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.6 pu, Zm =0.5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The main objectives of power system is/are Flexible power has to be available. Reliable power has to be available Cost of electrical energy per KWh is to be minimum All of these Flexible power has to be available. Reliable power has to be available Cost of electrical energy per KWh is to be minimum All of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be 10.936 pu 7.936 pu 9.936 pu 8.936 pu 10.936 pu 7.936 pu 9.936 pu 8.936 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base? 0.1 pu 0.25 pu 0.2 pu 0.4 pu 0.1 pu 0.25 pu 0.2 pu 0.4 pu ANSWER DOWNLOAD EXAMIANS APP
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