Power Systems Buchholz relay is used for protection of none of these. alternator. bus bar. transformer. none of these. alternator. bus bar. transformer. 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 840 Ω 210 Ω 420 Ω 400 Ω 840 Ω 210 Ω 420 Ω 400 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Plug setting of a relay can be altered by varying adjustable back up stop. none of these. no. of ampere-turns. air gap of magnetic path. adjustable back up stop. none of these. no. of ampere-turns. air gap of magnetic path. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor? 25% 50.5% 75% 62.5% 25% 50.5% 75% 62.5% 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 LLG LL LLL LG LLG LL LLL ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠°90 Ω, C = 0.5*10^-6∠90° ℧. Find Charging current under no load? 0.144∠90° A/phase 1.144∠90° A/phase 0.344∠90° A/phase 0.512∠90° A/phase 0.144∠90° A/phase 1.144∠90° A/phase 0.344∠90° A/phase 0.512∠90° A/phase ANSWER DOWNLOAD EXAMIANS APP
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