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Power Systems

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

 LL
 LLG
 LLL
 LG

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Power Systems
India 1st nuclear plant was set up at

  Kalpakkam.
  Bhaba.
  Rana pratap sagar.
  Tarapur.

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Power Systems
A network containing 50 buses in which 10 are the voltage control buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 83*83
 84*84
 33*33
 34*34

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Power Systems
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400 : 5, then plug setting multiplier will be

 50.
 10.
 15.
 25.

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Power Systems
A 1- phase transmission line operating at 30 kV has radius of 1 cm and distance between conductors is 0.5 m. Assume m = δ =1, g = 21 kV/cm and frequency f = 50 Hz. Find the critical disruptive voltage?

 34.64 kV/phase
 17.32 kV/phase
 82.15 kV/phase
 41.075 kV/phase

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Power Systems
Find the surge impedance of a line when inductance is 160 mH and capacitance is 1µF?

 160 Ω
 800 Ω
 200 Ω
 400 Ω

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