The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected?

Power Systems
The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected?

15%

88.2%

11.8%

85%

15%

88.2%

11.8%

85%

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Power Systems
Which cooling is preferred for large turbine generator

Hydrogen cooling.

Nitrogen cooling.

Oxygen cooling.

None of these.

Hydrogen cooling.

Nitrogen cooling.

Oxygen cooling.

None of these.

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Power Systems
Thermal shielding is provided to

protected the operating personal from exposure to radiations.

absorb the fast neutron.

prevent the reactor wall from getting heated.

All of these

protected the operating personal from exposure to radiations.

absorb the fast neutron.

prevent the reactor wall from getting heated.

All of these

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Power Systems
Lightning arresters are used for

protection of equipment from short circuits

All of these

protection of equipment from open circuits

protection of equipment from external lightning

protection of equipment from short circuits

All of these

protection of equipment from open circuits

protection of equipment from external lightning

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Power Systems
A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

0.25

0.05

0.02

0.025

0.25

0.05

0.02

0.025

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Power Systems
An hydro-graph indicates

the discharge at any time during the period under consideration.

the maximum and minimum run off during the period.

the average run off during the period.

All of these

the discharge at any time during the period under consideration.

the maximum and minimum run off during the period.

the average run off during the period.

All of these

ANSWER DOWNLOAD EXAMIANS APP

Power Systems

Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected?

Power Systems Which cooling is preferred for large turbine generator

Power Systems Thermal shielding is provided to

Power Systems Lightning arresters are used for

Power Systems A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

Power Systems An hydro-graph indicates

Power Systems
The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected?

Power Systems
Which cooling is preferred for large turbine generator

Power Systems
Thermal shielding is provided to

Power Systems
Lightning arresters are used for

Power Systems
A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

Power Systems
An hydro-graph indicates