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 0.512∠90° A/phase 1.144∠90° A/phase 0.144∠90° A/phase 0.344∠90° A/phase 0.512∠90° A/phase 1.144∠90° A/phase 0.144∠90° A/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero? 30.28 kV 29.28 kV 31.28 kV 28.28 kV 30.28 kV 29.28 kV 31.28 kV 28.28 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the stator faults? Inter phase faults over current All of these failure of excitation Inter phase faults over current All of these failure of excitation ANSWER DOWNLOAD EXAMIANS APP
Power Systems In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is 10. 1. 5. un changed. 10. 1. 5. un changed. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Capacitance voltage transformer ( CVT ) is used to connect instruments on the LT side. none of these. reduce losses in a transmission line. improve the power factor of the transmission. connect instruments on the LT side. none of these. reduce losses in a transmission line. improve the power factor of the transmission. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Asynchronous tie line is a DC transmission line either 1 or 2 AC transmission line None of these DC transmission line either 1 or 2 AC transmission line None of these ANSWER DOWNLOAD EXAMIANS APP
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