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
In a 4 bus,4×4 Y bus matrix the number of non zero elements are 12. Find the number of transmission lines?

8

5

4

2

8

5

4

2

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

Kaplan

Pelton

Francis

Impeller

Kaplan

Pelton

Francis

Impeller

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Power Systems
Which of the following is/are advantages of N-R method?

Time taken for each iteration is less

both 1 and 2

Applicable for large power system network

Number of iterations are less

Time taken for each iteration is less

both 1 and 2

Applicable for large power system network

Number of iterations are less

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Power Systems
The incremental fuel costs for two generating units G1 and G2 are given by Ic1 = 25 + 0.2 PG1 and Ic2 = 32 + 0.2 PG2, where PG1 and PG2 are real powers generated by the units. The economic allocation for a total load of 250 MW, neglecting transmission loss, is given by

PG1 = 125 MW and PG2 = 125 MW

PG1 = 142.5 MW and PG2 = 107.5 MW

PG1 = 109.75 MW and PG2 = 140.25 MW

PG1 = 100 MW and PG2 = 150 MW

PG1 = 125 MW and PG2 = 125 MW

PG1 = 142.5 MW and PG2 = 107.5 MW

PG1 = 109.75 MW and PG2 = 140.25 MW

PG1 = 100 MW and PG2 = 150 MW

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Power Systems
What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ?

120 : 6 / √3.

100 : 5 / √3.

200 : 5 / √3.

150 : 4 / √3.

120 : 6 / √3.

100 : 5 / √3.

200 : 5 / √3.

150 : 4 / √3.

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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 In a 4 bus,4×4 Y bus matrix the number of non zero elements are 12. Find the number of transmission lines?

Power Systems For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

Power Systems Which of the following is/are advantages of N-R method?

Power Systems The incremental fuel costs for two generating units G1 and G2 are given by Ic1 = 25 + 0.2 PG1 and Ic2 = 32 + 0.2 PG2, where PG1 and PG2 are real powers generated by the units. The economic allocation for a total load of 250 MW, neglecting transmission loss, is given by

Power Systems What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ?

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
In a 4 bus,4×4 Y bus matrix the number of non zero elements are 12. Find the number of transmission lines?

Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

Power Systems
Which of the following is/are advantages of N-R method?

Power Systems
The incremental fuel costs for two generating units G1 and G2 are given by Ic1 = 25 + 0.2 PG1 and Ic2 = 32 + 0.2 PG2, where PG1 and PG2 are real powers generated by the units. The economic allocation for a total load of 250 MW, neglecting transmission loss, is given by

Power Systems
What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ?