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Power Systems

Power Systems
The pickup value of relay is 6.5 Amp and fault current in relay coil is 39 Amp. Its plug setting multiplier is

 10 A.
  6 A.
 8 A.
 7 A.

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Power Systems
The per unit impedance Z(pu) is given by

 ZΩ* (MVA)b*100/(KV)²b
 ZΩ* (kVA)b/(KV)²b
 ZΩ* (MVA)b/((KV)²b *100)
 ZΩ* (MVA)b/(KV)²b

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Power Systems
The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

 25.8 mH.
 21.2 mH.
  23.8 mH.
 23.33 mH.

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Power Systems
Mho relays are used for the protection of which of the following lines?

 long transmission lines only
 medium transmission lines only
 short transmission lines only
None of these

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Power Systems
Specified quantities of load bus are

 Q and V
 P and δ
 P and Q
 V and δ

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Power Systems
Which of the following matrix is used for load flow studies?

 Unit matrix
 Z bus matrix
 Y bus matrix
 null matrix

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