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Power Systems

Power Systems
Transmission line parameters of the short transmission line are

 Z,0,Y,1
 1,Z,Y,1
 1,0,Y,1
 1,Z,0,1

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Power Systems
The total number of strands(N) is concentrically stranded cable with total annular space filled with strands of uniform diameter is given by (if x is number of layers)

 N = 3x²-2x+1
 N = 3x²-6x+1
 N = 3x²-3x+1
 N = 3x²+3x+1

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Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 two
 three
 one
 six

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Power Systems
The power output from an hydroelectric plants depend on

  discharge, system efficiency.
 type of dam, type of catchment area and discharge.
 type of dam, head, system efficiency.
 type of turbine, type of dam and type of catchment area.

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Power Systems
The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is

 LG
 LLL
 LL
 LLG

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Power Systems
A 3 - Φ, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is

  35 kA.
 104.8 kA.
 3600 A.
 1200 A.

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