Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is onbserved the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

1 Answers  

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How many types of fault occur in a 3-phase power system?

2 Answers  

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When connecting a loaded powerplant to the Huge grid,what are the factors to be considered and how the VAR flow will affect the system?

1 Answers  

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why does the time taken for fuse to melt is longer as the wire length increases?

1 Answers  

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Detailed working of a diesel generator set ?

1 Answers   Airtel, Honda, Kirloskar,

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what is ment by doublefield revolving theory?

2 Answers  

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Can we convert off line transformer to on line transformer

0 Answers   NHPC,

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wat is the advantage of increse in frequency?how the powersupply range decreses as the frequency increses?like in america,it uses 110 ac and 60 hz?

4 Answers  

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what will happen to give a dc supply in ac motor?

2 Answers   ABC, Indian Navy,

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Whta is WT in a transformer, specify its function.

4 Answers  

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In single phase capacitor motor, if the motor rotate reverse direction then how much power will be consumed by the motor and why?

0 Answers  

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