What is the difference between air & vaccum circuit breakers?

2 Answers   IOCL,

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why in some trains in India Electric equipment such as Fans , tube light not work until locomotive or engine is attached to the train ??

1 Answers  

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I would like to install the largest KW alternator to a 200 amp aluminum bus box in my home. Is it possible to install a 250 KW 400v 251amp synchronous alternator to my home?

2 Answers  

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difrent between vcb acb sf6 and mccb breakers

1 Answers   DMRC,

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what is the formula for backup time of online ups?

1 Answers  

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explain different losses in a transformer.

0 Answers  

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Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

0 Answers  

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what is the speed of electricity?

11 Answers   Bhel,

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how to select a circuit breaker?

24 Answers   ABB, BARC, TCS,

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which of the following can produce maximum induced voltage..... (a)1amp dc current (b)50amp dc current (c) 1amp 60 cycle ac current (d)1amp 490 cycle ac current.

2 Answers  

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what are the protecyion of transformer & generators

0 Answers  

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If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

0 Answers   Amara Raja,

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