Power Systems
By using guard ring in a transmission line, its string efficiency

 increase
 remains unaffected
 decrease
None of these

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Power Systems
ACSR means

 Aluminium copper steel reinforced
 all conductor steel reinforced
 Aluminium conductor steel reinforced
 Aluminium core steel reinforced

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Power Systems
Which of the following is/are the advantages of synchronous phase modifier over the shunt compensation?

 initial cost is low
 single unit can be used as both capacitance and inductor by adjusting the excitation
 both 1 and 2
 smooth voltage regulation is possible by controlling excitation

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