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?

LLG

LLL

LG

LL

LLG

LLL

LG

LL

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Power Systems
A sodium graphite reactors use

sodium as coolant and graphite as moderator.

sodium as moderator and graphite as coolant.

a mixture of sodium and graphite as moderator.

a mixture of sodium and graphite as coolant.

sodium as coolant and graphite as moderator.

sodium as moderator and graphite as coolant.

a mixture of sodium and graphite as moderator.

a mixture of sodium and graphite as coolant.

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

35 kA.

50 kA.

55 kA.

45 kA.

35 kA.

50 kA.

55 kA.

45 kA.

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Power Systems
The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

25.8 mH.

23.33 mH.

23.8 mH.

21.2 mH.

25.8 mH.

23.33 mH.

23.8 mH.

21.2 mH.

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Power Systems
Which of the following is/are the methods of improving transient stability?

Fast acting governing system

Fast acting excitation control

All of these

Dynamic breaking

Fast acting governing system

Fast acting excitation control

All of these

Dynamic breaking

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

decreases and decreases

increases and increases

decreases and increases

increases and decreases

decreases and decreases

increases and increases

decreases and increases

increases and decreases

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Power Systems

Power Systems A sodium graphite reactors use

Power Systems A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

Power Systems The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

Power Systems Which of the following is/are the methods of improving transient stability?

Power Systems In a long transmission line, if we increase the length of the line, the parameters A and B respectively

Power Systems
A sodium graphite reactors use

Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

Power Systems
The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

Power Systems
Which of the following is/are the methods of improving transient stability?

Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively