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Power Systems

Power Systems
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400 : 5, then plug setting multiplier will be

 25.
 50.
 15.
 10.

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 Z1 = Z2 = Z0
 any of the above
 (Z1 = Z2) < Z0
 (Z1 = Z2) > Z0

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Power Systems
As the frequency of the system is increased, the charging MVAR

None of these
 decreases
 increases
 remains unaffected

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Power Systems
One fission of U235 releases energy of

 335 MeV.
  200 MeV.
 435 MeV.
 525 MeV.

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Power Systems
An ACSR conductor has a diameter of 2 cm has internal inductance of 0.05 mH/Km. If this ACSR is replaced with another having a diameter of 4 cm then its internal inductance is

 0.1 mH/Km
 0.025 mH/Km
 0 mH/Km
 0.05 mH/Km

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Power Systems
a 50 Hz, 3-phase synchronous generator has inductance per phase of 15 mH. The capacitance of the generator and circuit breaker is 0.002 µF. What is its natural frequency?

 290 kHz
 29 MHz
 29 kHz
 2.9 kHz

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