A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred?

Power Systems
A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred?

LLL

LL

LG

LLG

LLL

LL

LG

LLG

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Power Systems
Thermal shielding is provided to

prevent the reactor wall from getting heated.

protected the operating personal from exposure to radiations.

absorb the fast neutron.

All of these

prevent the reactor wall from getting heated.

protected the operating personal from exposure to radiations.

absorb the fast neutron.

All of these

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Power Systems
For distortion less line which of following relation are true

R/L = C/G.

None of above.

R = O, G = O.

R/L = G/C.

R/L = C/G.

None of above.

R = O, G = O.

R/L = G/C.

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Power Systems
Lightning arresters are made up of which material?

any of the above

silicon oxide

copper

silver

any of the above

silicon oxide

copper

silver

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Power Systems
The power generated by two plants are; P1 = 50 MW, P2 = 40 MW. If the loss coefficients are B11 = 0.001, B22 = 0.0025 and B12 = -0.0005, then power loss will be

8.5 MW

5.5 MW

4.5 MW

6.5 MW

8.5 MW

5.5 MW

4.5 MW

6.5 MW

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm cosωt?

4.68 msec

9.68

1.47 msec

2.63 msec

4.68 msec

9.68

1.47 msec

2.63 msec

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Power Systems

Power Systems Thermal shielding is provided to

Power Systems For distortion less line which of following relation are true

Power Systems Lightning arresters are made up of which material?

Power Systems The power generated by two plants are; P1 = 50 MW, P2 = 40 MW. If the loss coefficients are B11 = 0.001, B22 = 0.0025 and B12 = -0.0005, then power loss will be

Power Systems A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm cosωt?

Power Systems
Thermal shielding is provided to

Power Systems
For distortion less line which of following relation are true

Power Systems
Lightning arresters are made up of which material?

Power Systems
The power generated by two plants are; P1 = 50 MW, P2 = 40 MW. If the loss coefficients are B11 = 0.001, B22 = 0.0025 and B12 = -0.0005, then power loss will be

Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm cosωt?