what is over frequency protection

1 Answers  

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1.After synchronising the alternator to the grid,how we r delivering power to the grid?if the i/p increases does the speed hence frequency increases? 2.y the power factor is changing when exitation changes?what is the relation with p.f and flux?

4 Answers   BSNL,

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What cmos is and its benefits?

0 Answers  

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Is MEN and RCD related to each other ?? IF yes then how??

0 Answers  

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why we use delta connection in transformer

2 Answers   UPPCL,

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what is ring main unit?

1 Answers   Otis,

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Briefing the effects of ASR and ACR of a double closed-loop speed regulating system.

0 Answers  

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1. what is difference between VCB and ACB.how its works please explian.

6 Answers   ABB, Accenture, HP, Minda, Mother Dairy, Satyam Pharma,

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What is synchro?

0 Answers  

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30 kva ups may kitne output voltage hote h

1 Answers   ME,

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what is corona effect?

39 Answers   ABB, Genco, Wipro,

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why ac supply neutral should earth not in dc (-)

2 Answers  

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