why we are using DC supply for all protection relays, why cant we use AC supply..???

1 Answers  

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what's the difference between 'shaft power demand' and 'BHP' , when we consider electrical load list.

0 Answers   HEC,

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In 3phase power= Root*3*v*i*cos@ What is the power in 2phase....??? and Derive it

3 Answers   Essar,

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In power plants the reading changes abruptly to give value (MW -25) (MVAR -15) What are the reasons for this? What is the solution?

2 Answers   GE,

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when elecromagnatic waves are propogated in a wave guide?

0 Answers  

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why constant voltage transformer should be start without load? and if started then what will happen?

0 Answers  

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In synchronous generators field is rotor and armature is stator.Can we take the output at the rotor in case of synchronous generator by the dc excitation on the stator?

2 Answers  

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what is surge suppressor?

5 Answers   Essar,

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I am shobana from Chennai. I am having my personal interview on 19th Dec at Chennai.kindly mail me the questions to mail id shobana.shanthi@gmail.com

0 Answers   Avalon, KK Capital,

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Difference between EDO and MDO breakers?

10 Answers   ACB,

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what will be fault level of 11 KV , 2000 A ELECTRICAL SYSTEM?

4 Answers  

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A 25MVA 3300/400V T/F is termed as per winding is …… a) primary 3300V & Secondary 400V b) primary 3300V & low voltage winding 400V c) High voltage winding 3300V & Secondary 400V d) High voltage winding 3300V & low voltage winding 400V

4 Answers   Engineers India Limited,

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