Power Systems To protect the power transformer ( Y-Y with neutral grounded) against fault, which type of connection do the current transformers have? Δ-Y connection Δ-Δ connection Y-Δ connection Y-Y connection Δ-Y connection Δ-Δ connection Y-Δ connection Y-Y connection ANSWER DOWNLOAD EXAMIANS APP
Power Systems Corona is accompanied by violet visible light hissing sound All of these power loss and interference violet visible light hissing sound All of these power loss and interference ANSWER DOWNLOAD EXAMIANS APP
Power Systems For which one of the following types of motors, is the equal area criterion for stability applicable? DC series motor DC shunt motor Three phase synchronous motor Three phase induction motor DC series motor DC shunt motor Three phase synchronous motor Three phase induction motor 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 0.48 Hz 50 Hz 0.52 Hz -0.52 Hz 0.48 Hz 50 Hz 0.52 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal protection relay provides protection against what? Over load Short circuit Temperature any of the above Over load Short circuit Temperature any of the above ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a two plant system, the load is connected to plant number 2. The loss coefficients are B11,B22,B12 are non zeros B11,B22 are non zero,B12 = 0 B11 is non zero,B22 = B12 = 0 B11,B12 are non zero ,B22 = 0 B11,B22,B12 are non zeros B11,B22 are non zero,B12 = 0 B11 is non zero,B22 = B12 = 0 B11,B12 are non zero ,B22 = 0 ANSWER DOWNLOAD EXAMIANS APP
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