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POWER SYSTEMS

Power Systems
Capacitance voltage transformer ( CVT ) is used to

  improve the power factor of the transmission.
 reduce losses in a transmission line.
 none of these.
 connect instruments on the LT side.

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Power Systems
The unit protection scheme provides

 simultaneous protection.
 back up protection.
 remote protection.
  primary protection.

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Power Systems
In a 400 kV power network, 360 kV is recorded at 400 kV bus. The reactive power absorbed by a shunt reactor for 50 MVAr, 400 kV connected at the bus is

 61.73 MVAr.
 45.0 MVAr.
  40.5 MVAr.
 55.56 MVAr.

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Power Systems
The insulation of the modern EHV lines is designed based on

 corona.
 R × I.
  the switch voltage.
 the lighting voltage.

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Power Systems
The ratio of reset to pick up current for an induction cup relay is approximately

  0.99.
 0.75.
 1.35.
 1.0.

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