What is the difference between Relay and Contactor

35 Answers   Siemens,

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HOW can i REuse the fused MLL LAMPS & GLS LAMPS at our factory

0 Answers  

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Types of tempering of energy meter?

1 Answers   Nespak,

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How to control the dc motor in ac supply without thyristor circuit?

2 Answers  

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how many types of ratings are there of transformer

5 Answers   Met Trade,

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what is the function of a commutator in a dc generator?

14 Answers   College School Exams Tests, NTPC, TCS,

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What is the working principle of servo motor? And explain it.

0 Answers  

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what diferent amoung three phase supply?

1 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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when we put inducter in neuteral grounding of genrator.

3 Answers  

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What are the main faults of DC generators?

0 Answers   Mercantile Marine Department,

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who & how the notations given as RYB to 3phase power supply.

1 Answers  

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