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POWER SYSTEMS

Power Systems
The sequence components of the fault current are as follows : Ipositive = j1.5 pu, Inegative = − j0.5 pu, Izero = − j pu Which fault is this?

  LG.
  LLLG.
  LL.
  LLG.

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Power Systems
On a power system network the load is increasing represents the value of impedance

  increase.
  decrease.
  remains constant.
  none of above.

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Power Systems
If a fault occurs on any feeder, the fault current is

  equal to unsectional bus bar.
  much lower than with unsectional bus bar.
  none of these.
  much higher than with unsectional bus bar.

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Power Systems
A loss less transmission line having surge impedance loading (SIL) of 2280 MW is provided with a uniformly distributed series capacitive compensation of 30 %. Then SIL of compensated transmission line will be

 2725 MW.
 1835 MW.
  2280 MW.
 3257 MW.

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Power Systems
When a neutral point of 3 - Φ system is directly connected to earth then it has what type of grounding?

  Peterson coil.
  Solid.
  Reactance.
  Resistance.

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