A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

Power Systems
A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

30.28 kV

28.28 kV

31.28 kV

29.28 kV

30.28 kV

28.28 kV

31.28 kV

29.28 kV

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Power Systems
Corona loss is ----------------- on hilly areas than as plain areas.

more

less

remain same

None of these

more

less

remain same

None of these

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Power Systems
In which of the following given faults, all the sequence currents are equal?

LLL

LLG

LG

LL

LLL

LLG

LG

LL

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Power Systems
When a pumped storage power plant is operated in conjunction with a steam power plant

load factor of the steam plant is increased

the operating cost of the steam plant become optimum

chances of the tripping of the system decrease

All of these

load factor of the steam plant is increased

the operating cost of the steam plant become optimum

chances of the tripping of the system decrease

All of these

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Power Systems
Find the value of a729, where "a" is the operator

α

α²

0

1

α

α²

0

1

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Power Systems
A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?

1 F

2 F

4 F

0.5 F

1 F

2 F

4 F

0.5 F

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Power Systems

Power Systems A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

Power Systems Corona loss is ----------------- on hilly areas than as plain areas.

Power Systems In which of the following given faults, all the sequence currents are equal?

Power Systems When a pumped storage power plant is operated in conjunction with a steam power plant

Power Systems Find the value of a729, where "a" is the operator

Power Systems A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?

Power Systems
A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

Power Systems
Corona loss is ----------------- on hilly areas than as plain areas.

Power Systems
In which of the following given faults, all the sequence currents are equal?

Power Systems
When a pumped storage power plant is operated in conjunction with a steam power plant

Power Systems
Find the value of a729, where "a" is the operator

Power Systems
A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?