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? 0.344∠90° A/phase 1.144∠90° A/phase 0.144∠90° A/phase 0.512∠90° A/phase 0.344∠90° A/phase 1.144∠90° A/phase 0.144∠90° A/phase 0.512∠90° A/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems If a fault occurs on any feeder, the fault current is equal to unsectional bus bar. much lower than with unsectional bus bar. none of these. much higher than with unsectional bus bar. equal to unsectional bus bar. much lower than with unsectional bus bar. none of these. much higher than with unsectional bus bar. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A diesel power plant is generally used as a/an Peak loads. Base load. Any of above. Standby/emergency plant. Peak loads. Base load. Any of above. Standby/emergency plant. ANSWER DOWNLOAD EXAMIANS APP
Power Systems What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system? Bulk oil type CB Air blast CB Sulphur hexafluoride CB Vacuum CB Bulk oil type CB Air blast CB Sulphur hexafluoride CB Vacuum CB ANSWER DOWNLOAD EXAMIANS APP
Power Systems If skin depth is more, then skin effect is more None of these less either 1 or 2 more None of these less either 1 or 2 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 7.25 pu 3.75 pu 4.28 pu 2.5 pu 7.25 pu 3.75 pu 4.28 pu 2.5 pu ANSWER DOWNLOAD EXAMIANS APP
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