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

4.28 pu

2.5 pu

7.25 pu

3.75 pu

4.28 pu

2.5 pu

7.25 pu

3.75 pu

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Power Systems
A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator?

1000

0.001

10

0.1

1000

0.001

10

0.1

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Power Systems
The total number of strands in a ACSR conductor are 7, then find the layer number?

3

5

7

2

3

5

7

2

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Power Systems
A load centre is at an equidistant from the two thermal generating stations G1 and G2. The fuel cost characteristics of the generating stations are given by F1 = a + bP1 + cP²1 F2 = a + b P2 + 2cP²2 Where P1 and P2 are the generation in MW of G1 and G2, respectively. For most economic generation to meet 300 MW of load, P1 and P2 respectively, are

175, 125

150, 150

100, 200

200, 100

175, 125

150, 150

100, 200

200, 100

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Power Systems
An impulse turbine

operates by initial complete conversion to kinetic energy.

always operates submerged.

is most suited for low head and high discharge power plants.

makes use of a draft tube.

operates by initial complete conversion to kinetic energy.

always operates submerged.

is most suited for low head and high discharge power plants.

makes use of a draft tube.

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Power Systems
What are the tests performed for oil-filled and gas-filled cables ?

Impulse tests.

All of these.

Load cycle tests.

Thermal stability test.

Impulse tests.

All of these.

Load cycle tests.

Thermal stability test.

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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 A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator?

Power Systems The total number of strands in a ACSR conductor are 7, then find the layer number?

Power Systems An impulse turbine

Power Systems What are the tests performed for oil-filled and gas-filled cables ?

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
A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator?

Power Systems
The total number of strands in a ACSR conductor are 7, then find the layer number?

Power Systems
An impulse turbine

Power Systems
What are the tests performed for oil-filled and gas-filled cables ?