Power Systems Fault calculations using computer are usually done by Z bus method None of these Y bus method either 1 or 2 Z bus method None of these Y bus method either 1 or 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be 49 kVA. 89.22 kVA. 70 kVA. 35 kVA. 49 kVA. 89.22 kVA. 70 kVA. 35 kVA. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be 420 Ω 840 Ω 400 Ω 210 Ω 420 Ω 840 Ω 400 Ω 210 Ω 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? LG LLL LL LLG LG LLL LL LLG ANSWER DOWNLOAD EXAMIANS APP
Power Systems A network containing 50 buses in which 10 are the voltage control buses, 6 are the generator buses. Find the size of the Jacobian matrix? 34*34 83*83 84*84 33*33 34*34 83*83 84*84 33*33 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? -0.92 -0.56 0.56 0.92 -0.92 -0.56 0.56 0.92 ANSWER DOWNLOAD EXAMIANS APP
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