A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

Power Systems
A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

1.375 pu

3.975 pu

2.4 pu

0.2 pu

1.375 pu

3.975 pu

2.4 pu

0.2 pu

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Power Systems
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

76%

82%

80%

78%

76%

82%

80%

78%

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Power Systems
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?

18 MW

5 MW

10 MW

9 MW

18 MW

5 MW

10 MW

9 MW

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Power Systems
The main objectives of power system is/are

All of these

Flexible power has to be available.

Reliable power has to be available

Cost of electrical energy per KWh is to be minimum

All of these

Flexible power has to be available.

Reliable power has to be available

Cost of electrical energy per KWh is to be minimum

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Power Systems
Which of the following grounding is not practically preferred for protection of equipments?

reactance grounding

All of these

isolated grounding

resistance grounding

reactance grounding

All of these

isolated grounding

resistance grounding

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Power Systems
Critical mass is

a mass of fissionable material required to stop a chain reaction.

none of these.

maximum mass of fissionable material required to sustain a chain reaction.

minimum mass of fissionable material required to sustain chain reaction.

a mass of fissionable material required to stop a chain reaction.

none of these.

maximum mass of fissionable material required to sustain a chain reaction.

minimum mass of fissionable material required to sustain chain reaction.

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Power Systems

Power Systems A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

Power Systems A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

Power Systems A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?

Power Systems The main objectives of power system is/are

Power Systems Which of the following grounding is not practically preferred for protection of equipments?

Power Systems Critical mass is

Power Systems
A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

Power Systems
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

Power Systems
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?

Power Systems
The main objectives of power system is/are

Power Systems
Which of the following grounding is not practically preferred for protection of equipments?

Power Systems
Critical mass is