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POWER SYSTEMS

Power Systems
A transmission line has self and mutual impedances are 0.8 and 0 pu respectively. Find the positive, negative and zero sequence impedances respectively?

 0.6, 0.6 and 0.6 pu
 0.8, 0.8 and 0.8 pu
 0.6, 0.8 and 1.2 pu
 0.6, 0.6 and 1.2 pu

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Power Systems
For symmetrical network, the neutral current is

 maximum
 any of the above
 infinity
 zero

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Power Systems
When reactance grounding is used in network, the voltage between neutral and ground is

 IR0 × Xn
 IN × Xn
 3×IR0 × Xn
 both 1 and 3

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Power Systems
The value of inductance used for compensation of arcing grounds is

 3ω²C
 3/ω²C
 1/3ω²C
 ω²C/3

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Power Systems
The ground capacitance existing between transmission line and ground is 4µF. Find the inductive reactance of the peterson coil for compensation of arcing grounds?

 265.25 Ω
 625.35 Ω
 0.844 Ω
 855.26 Ω

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