Power Systems The insulation resistance of the 20 km long underground cable is 8 MΩ. Other things being same, the insulation resistance of 10 km long cable will be 32 MΩ 16 MΩ 4 MΩ 8 MΩ 32 MΩ 16 MΩ 4 MΩ 8 MΩ ANSWER DOWNLOAD EXAMIANS APP
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 incident current? 200 A 2500 A 250 A 100 A 200 A 2500 A 250 A 100 A ANSWER DOWNLOAD EXAMIANS APP
Power Systems In which of the following given faults, all the sequence currents are equal? LL LLL LLG LG LL LLL LLG LG ANSWER DOWNLOAD EXAMIANS APP
Power Systems Attenuation occurs due to conductance both 1 and 3 resistance inductance conductance both 1 and 3 resistance inductance ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu? 1.375 pu 0.2 pu 3.975 pu 2.4 pu 1.375 pu 0.2 pu 3.975 pu 2.4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems When reactance grounding is used in network, the voltage between neutral and ground is IN × Xn both 1 and 3 3×IR0 × Xn IR0 × Xn IN × Xn both 1 and 3 3×IR0 × Xn IR0 × Xn ANSWER DOWNLOAD EXAMIANS APP
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