An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

2.5 pu

7.25 pu

3.75 pu

4.28 pu

2.5 pu

7.25 pu

3.75 pu

4.28 pu

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Power Systems
When bundle conductor are used in place of single conductor the effective inductance and capacitance will respectively

decrease and remain unaffected.

decrease and increase.

increase and remain unaffected.

increase and decrease.

decrease and remain unaffected.

decrease and increase.

increase and remain unaffected.

increase and decrease.

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Power Systems
Mho relay is used for the protection of

medium length lines.

long transmission lines.

no length criterion.

short length lines.

medium length lines.

long transmission lines.

no length criterion.

short length lines.

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Power Systems
For which one of the following types of motors, is the equal area criterion for stability applicable?

DC shunt motor

DC series motor

Three phase synchronous motor

Three phase induction motor

DC shunt motor

DC series motor

Three phase synchronous motor

Three phase induction motor

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Power Systems
Which of the following is/are the advantages of synchronous phase modifier over the shunt compensation?

both 1 and 2

single unit can be used as both capacitance and inductor by adjusting the excitation

smooth voltage regulation is possible by controlling excitation

initial cost is low

both 1 and 2

single unit can be used as both capacitance and inductor by adjusting the excitation

smooth voltage regulation is possible by controlling excitation

initial cost is low

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Power Systems
Uses of diesel power stations

peak load plant.

standby plants.

emergency plants.

All of these

peak load plant.

standby plants.

emergency plants.

All of these

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Power Systems

Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

Power Systems When bundle conductor are used in place of single conductor the effective inductance and capacitance will respectively

Power Systems Mho relay is used for the protection of

Power Systems For which one of the following types of motors, is the equal area criterion for stability applicable?

Power Systems Which of the following is/are the advantages of synchronous phase modifier over the shunt compensation?

Power Systems Uses of diesel power stations

Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

Power Systems
When bundle conductor are used in place of single conductor the effective inductance and capacitance will respectively

Power Systems
Mho relay is used for the protection of

Power Systems
For which one of the following types of motors, is the equal area criterion for stability applicable?

Power Systems
Which of the following is/are the advantages of synchronous phase modifier over the shunt compensation?

Power Systems
Uses of diesel power stations