What is Phasing out test?

1 Answers  

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what is magnetizing current test in power transformer

0 Answers   ABB,

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how slip power recovery system work

0 Answers   Ambuja,

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What is difference between VCB and SF6 breaker

4 Answers  

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We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

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In ac circuit R,L,C are connected in series what is the output the circuit? explain

4 Answers  

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Distinguish between Earth & Neutral?

5 Answers   Essar,

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During the transients in alternator,the mechanical power input remains almost constant while the electrical power output changes significantly.Why?

1 Answers  

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Why the voltage n frequency of the incoming generator is kept slightly higher than d grid voltage n frequency while synchronization ?

4 Answers  

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advantage of using 110v than 230v

1 Answers   NTPC,

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in control scheme dc logic wiring commonly using negative loop,what is the reason?if we use positive looping what will happen?

0 Answers   DNJ Energy LLC, WI,

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how to calculate percentage impedence at 75 deg C at normal tap

0 Answers  

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