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? 17.32 kV/phase 82.15 kV/phase 34.64 kV/phase 41.075 kV/phase 17.32 kV/phase 82.15 kV/phase 34.64 kV/phase 41.075 kV/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV? 10 13 21 20 10 13 21 20 ANSWER DOWNLOAD EXAMIANS APP
Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is 3.75 pu 2.5 pu 7.25 pu 4.28 pu 3.75 pu 2.5 pu 7.25 pu 4.28 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems In which of the following transmission lines capacitance effect is negligible? long transmission lines shoart transmission lines both 1 and 3 medium transmission lines long transmission lines shoart transmission lines both 1 and 3 medium transmission lines ANSWER DOWNLOAD EXAMIANS APP
Power Systems In order to have lower cost of power generaion the load factor and diversity factor should be low the load factor should be low but diversity factor should be high The load factor and diversity factor should be high the load factor should be high but diversity factor should be low the load factor and diversity factor should be low the load factor should be low but diversity factor should be high The load factor and diversity factor should be high the load factor should be high but diversity factor should be low ANSWER DOWNLOAD EXAMIANS APP
Power Systems The method of neutral grounding affects the All of these negative sequence network zero sequence network positive sequence network All of these negative sequence network zero sequence network positive sequence network ANSWER DOWNLOAD EXAMIANS APP
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