Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

Power Systems
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

75%

86%%

90%

50%

75%

86%%

90%

50%

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Power Systems
Which of the following is/are base load plants?

thermal plants

All of these

hydro plants

nuclear plants

thermal plants

All of these

hydro plants

nuclear plants

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Power Systems
Transmission line parameters of the short transmission line are

1,0,Y,1

Z,0,Y,1

1,Z,0,1

1,Z,Y,1

1,0,Y,1

Z,0,Y,1

1,Z,0,1

1,Z,Y,1

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Power Systems
In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

3.000 pu.

0.200 pu.

0.125 pu.

0.075 pu.

3.000 pu.

0.200 pu.

0.125 pu.

0.075 pu.

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Power Systems
A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at an current of 8 Amp. Calculate the radius of wire that will blow off at an current of 1 amp?

0.2 mm.

4 mm.

2 mm.

0.4 mm.

0.2 mm.

4 mm.

2 mm.

0.4 mm.

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Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

3.

5.

20.

7.

3.

5.

20.

7.

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Power Systems

Power Systems Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

Power Systems Which of the following is/are base load plants?

Power Systems Transmission line parameters of the short transmission line are

Power Systems In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

Power Systems A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at an current of 8 Amp. Calculate the radius of wire that will blow off at an current of 1 amp?

Power Systems If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

Power Systems
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

Power Systems
Which of the following is/are base load plants?

Power Systems
Transmission line parameters of the short transmission line are

Power Systems
In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

Power Systems
A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at an current of 8 Amp. Calculate the radius of wire that will blow off at an current of 1 amp?

Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.