In carrier current protection, the purpose of the wave trap is for

DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

Trapping power frequency waves

Tripping fault current

All of these

Trapping high frequency waves entering into generator/transformer unit.

Trapping power frequency waves

Tripping fault current

All of these

Trapping high frequency waves entering into generator/transformer unit.

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DGVCL Exam Paper (11-12-2011)
If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

10

25

50

15

10

25

50

15

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DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

0.5 leading

0.6 leading

0.8 lagging

0.6 lagging

0.5 leading

0.6 leading

0.8 lagging

0.6 lagging

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce winding losses

Eliminate losses on account of fair friction

Reduce bearing friction

Eliminate hunting and provide adequate starting torque

Reduce winding losses

Eliminate losses on account of fair friction

Reduce bearing friction

Eliminate hunting and provide adequate starting torque

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DGVCL Exam Paper (11-12-2011)
If the excitation of a synchronous generator fails, it acts as a

Synchronous generator

Induction motor

Synchronous motor

Induction generator

Synchronous generator

Induction motor

Synchronous motor

Induction generator

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The cross-magnetizing effect of armature mmf

The demagnetizing effect of armature mmf

The reactance voltage

Both the cross-magnetizing mmf and the reactance voltage

The cross-magnetizing effect of armature mmf

The demagnetizing effect of armature mmf

The reactance voltage

Both the cross-magnetizing mmf and the reactance voltage

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) In carrier current protection, the purpose of the wave trap is for

DGVCL Exam Paper (11-12-2011) If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

DGVCL Exam Paper (11-12-2011) An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011) The purpose of embedding the damper winding in the pole face of a synchronous motor is to

DGVCL Exam Paper (11-12-2011) If the excitation of a synchronous generator fails, it acts as a

DGVCL Exam Paper (11-12-2011) The purpose of interpoles in DC machines is to nullify

DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

DGVCL Exam Paper (11-12-2011)
If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

DGVCL Exam Paper (11-12-2011)
If the excitation of a synchronous generator fails, it acts as a

DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify