Answer / k.senthil kumar

HAi Mr Ankush Miglani i have doubt about transformer kept
Star-Star (Y-Y)(YNynO vector group) conections how we can
earth the primary side .

Answer / prashant

no one is correct
even also i don't know the answer.

Answer / balu

If you take the case of Y/Delta step down t/f , it don't have neutral thats why no earthing req.

what is different between synchronous & asynchronous motors

3 Answers  

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how step down and step up voltage is occured in transformer

3 Answers  

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how to calculate short ckt current of trafo. ex.3-ph 3MVA trfo. 11/440, impdence voltage=7.25%

1 Answers  

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why dc current is supplied in america rather than ac

1 Answers  

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what is DG A,B,C,D check?

1 Answers  

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Though transformer consist winding which usually cause reactive power change in both generator and motor but it wont affect reactive power passing through transformer why?

2 Answers   Jindal, Reliance,

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what is surge voltage and surge current?

2 Answers   MES,

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what is the operation of regulator in fan?

4 Answers   NTPC,

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in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients

0 Answers   Siemens,

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what is the difference between MCCB and SFU in terms of their application?

2 Answers   Secure Meters, Tata Teleservices,

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how technical is calculated in 11kv line and lt line

0 Answers  

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how does the thyistor work in dc drive?

0 Answers  

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