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?

LLL

LL

LG

LLG

LLL

LL

LG

LLG

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

increase and decrease.

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.

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Power Systems
Per unit of any quantity is defined as

base value of quantity /actual value of quantity in different units

base value of quantity /actual value of quantity in same units

actual value of quantity /base value of quantity in different units

actual value of quantity /base value of quantity in same units

base value of quantity /actual value of quantity in different units

base value of quantity /actual value of quantity in same units

actual value of quantity /base value of quantity in different units

actual value of quantity /base value of quantity in same units

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Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

shunt capacitor

both 1 and 2

series capacitor

shunt reactor

shunt capacitor

both 1 and 2

series capacitor

shunt reactor

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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

50.

15.

10.

25.

50.

15.

10.

25.

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Power Systems
In case of failure of prime mover of the generator, which type of relay is used?

impedance relay

distance relays

offset mho relay

reverse power relay

impedance relay

distance relays

offset mho relay

reverse power relay

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Power Systems

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

Power Systems Per unit of any quantity is defined as

Power Systems Surge impedance loading of a line is increased by which of the following compensation methods?

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

Power Systems In case of failure of prime mover of the generator, which type of relay is used?

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

Power Systems
Per unit of any quantity is defined as

Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

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

Power Systems
In case of failure of prime mover of the generator, which type of relay is used?