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?

31.28 kV

30.28 kV

28.28 kV

29.28 kV

31.28 kV

30.28 kV

28.28 kV

29.28 kV

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Power Systems
Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

0.48 Hz

50 Hz

0.52 Hz

-0.52 Hz

0.48 Hz

50 Hz

0.52 Hz

-0.52 Hz

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Power Systems
Per unit of any quantity is defined as

actual value of quantity /base value of quantity in different units

base value of quantity /actual value of quantity in different units

actual value of quantity /base value of quantity in same units

base value of quantity /actual value of quantity in same units

actual value of quantity /base value of quantity in different units

base value of quantity /actual value of quantity in different units

actual value of quantity /base value of quantity in same units

base value of quantity /actual value of quantity in same units

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Power Systems
The fact that current density is higher at the surface when compared to centre is known as

skin effect

All of these

carona

proximity effect

skin effect

All of these

carona

proximity effect

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Power Systems
Gross head of an hydroelectric power station is

the difference of water level between the level in storage and tail race.

the height of water level in the river where the tail race is provided.

the height of water level in the river where the storage is provided.

all of above.

the difference of water level between the level in storage and tail race.

the height of water level in the river where the tail race is provided.

the height of water level in the river where the storage is provided.

all of above.

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Power Systems
With reference to hydrometer station, the graphical representation of the discharge as function of time is known as

Hydro-graph.

Monograph.

Hectograph.

Load duration curve.

Hydro-graph.

Monograph.

Hectograph.

Load duration curve.

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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 Per unit of any quantity is defined as

Power Systems The fact that current density is higher at the surface when compared to centre is known as

Power Systems Gross head of an hydroelectric power station is

Power Systems With reference to hydrometer station, the graphical representation of the discharge as function of time is known as

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
Per unit of any quantity is defined as

Power Systems
The fact that current density is higher at the surface when compared to centre is known as

Power Systems
Gross head of an hydroelectric power station is

Power Systems
With reference to hydrometer station, the graphical representation of the discharge as function of time is known as