how is the testing of an REF relay? what are the test REF circuit having?

0 Answers   Siemens,

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how to calculate the over current rating of 3phase motor

2 Answers  

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how does an open delta transformer works

2 Answers  

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what is automatic voltage regulator and it is used?

2 Answers   HAL,

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wat is d diffr btw shunt coil and trip coil in VCB?

0 Answers   NTPC,

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how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?

0 Answers  

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why is the conservator tank painted white on the transformer

0 Answers   Bangladesh Bank,

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what is the maximum genarating in india?

17 Answers  

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where we take earth in hill station

1 Answers  

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where HT & LT capacitor uses ?

2 Answers   NTPC,

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what is cogging? how it can be controlled?

1 Answers   HCL,

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What are the safeties in elevators?what is the use of governor in elevator?

3 Answers   JLL,

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