In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

Power Systems
In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

500 Ω

25 Ω

250 Ω

1000 Ω

500 Ω

25 Ω

250 Ω

1000 Ω

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Power Systems
Which of the following represents the transmission or reflection coefficient of voltage Tv? (Zl = Surge impedance of load, Zs = Surge impedance of line)

(Zl - Zs)/(Zs + Zl)

2Zs/(Zs + Zl)

2Zl/(Zs + Zl)

(Zs - Zl)/(Zs + Zl)

(Zl - Zs)/(Zs + Zl)

2Zs/(Zs + Zl)

2Zl/(Zs + Zl)

(Zs - Zl)/(Zs + Zl)

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Power Systems
Which of the following circuit breakers produce least arc energy?

Minimum oil CB.

Air break CB.

Plain oil CB.

Air blast CB.

Minimum oil CB.

Air break CB.

Plain oil CB.

Air blast CB.

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Power Systems
When series reactor is used in generating stations, the fault current magnitude is

remains unaffected

any of the above

reduced

increased

remains unaffected

any of the above

reduced

increased

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Power Systems
If the frequency is increased, then skin effect will

increases

remains unaffected

any of the above

decreases

increases

remains unaffected

any of the above

decreases

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Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

None of above.

Francis.

Pelton.

Kaplan.

None of above.

Francis.

Pelton.

Kaplan.

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Power Systems

Power Systems In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

Power Systems Which of the following represents the transmission or reflection coefficient of voltage Tv? (Zl = Surge impedance of load, Zs = Surge impedance of line)

Power Systems Which of the following circuit breakers produce least arc energy?

Power Systems When series reactor is used in generating stations, the fault current magnitude is

Power Systems If the frequency is increased, then skin effect will

Power Systems For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

Power Systems
In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

Power Systems
Which of the following represents the transmission or reflection coefficient of voltage Tv? (Zl = Surge impedance of load, Zs = Surge impedance of line)

Power Systems
Which of the following circuit breakers produce least arc energy?

Power Systems
When series reactor is used in generating stations, the fault current magnitude is

Power Systems
If the frequency is increased, then skin effect will

Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant