Power Systems A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the transmitted voltage? 36. 36 kV 30.6 Kv 18.18 kV 100 kV 36. 36 kV 30.6 Kv 18.18 kV 100 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected? 85% 11.8% 15% 88.2% 85% 11.8% 15% 88.2% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Critical disruptive voltage is a voltage at which both 1 and 2 nether 1 nor 2 corona is visible with blue or violet colour corona is just initiated both 1 and 2 nether 1 nor 2 corona is visible with blue or violet colour corona is just initiated ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following decides the insulation level of 400 kV, EHV line? switching over voltage radio interference skin effect lighting voltage switching over voltage radio interference skin effect lighting voltage ANSWER DOWNLOAD EXAMIANS APP
Power Systems If R = 84 ohm/Km, G = 10-6 mho/Km, H = 0.01 H/Km, C = 0.061 μ F/Km and frequency = 1000 Hz, then what is the value of propagation constant of the transmission line None of them. 0.018 per Km. 0.09 + j 0.018 per Km. 0.01 + j 0.02 per Km. None of them. 0.018 per Km. 0.09 + j 0.018 per Km. 0.01 + j 0.02 per Km. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line? -0.52 Hz 0.52 Hz 50 Hz 0.48 Hz -0.52 Hz 0.52 Hz 50 Hz 0.48 Hz ANSWER DOWNLOAD EXAMIANS APP
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