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 the shunt reactor required for compensating ferranti effect? 2000 Ω 1500 Ω 3000 Ω 500 Ω 2000 Ω 1500 Ω 3000 Ω 500 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems The unit protection scheme provides simultaneous protection. primary protection. back up protection. remote protection. simultaneous protection. primary protection. back up protection. remote protection. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Where the voltage is high and current to be interrupted is low, Which of following the breaker is preferable? Any of these. Air blast CB. Oil CB. Vacuum CB. Any of these. Air blast CB. Oil CB. Vacuum CB. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power system network has n nodes, Z33 of its bus impedance matrix is j0.5 pu. The voltage at node 3 is 1.3∠ -10°. If capacitor is having reactance of -j3.5 pu is now added to the network between node 3 and reference node, the current drawn by the capacitor in pu is 0.433∠ 80° 0.325∠ -100° 0.725∠ 80° 0.371∠ -100° 0.433∠ 80° 0.325∠ -100° 0.725∠ 80° 0.371∠ -100° ANSWER DOWNLOAD EXAMIANS APP
Power Systems Operating cost of thermal power station is less than that of diesel power plant. less than that of nuclear power plant. is the same as that of nuclear power plant. less than that of hydroelectric power plant. less than that of diesel power plant. less than that of nuclear power plant. is the same as that of nuclear power plant. less than that of hydroelectric power plant. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a three-phase system, when the loads are perfectly balanced, the neutral current is one - third of maximum. two - thirds of maximum. one - third of minimum. zero. one - third of maximum. two - thirds of maximum. one - third of minimum. zero. ANSWER DOWNLOAD EXAMIANS APP
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