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ACB is mainly used at LT sides for the protection of whole distribution system for the desired area supply it trips at the moment of over load or any internal short ckt in the breaker.where as MCCB is advanced version of MCB which is used for particular equipment or some groups of single phase load which trips only due to over load current.

what is the meaning of insulation level?

2 Answers  

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why choke is provided in the centre of the tube light?

3 Answers  

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how can maintaince the acb contactor moveing and fixing kit

0 Answers   Gulf Cement,

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explain with the help of loading capability curve,reactive power generation and absorption from synchronous generator?

0 Answers  

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what is tpmo switch

3 Answers  

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25 kva load,

1 Answers   Voltas,

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why effective resistance should be more than static resistance in transmission line?

0 Answers  

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What do you mean by reach and reach the point of the relay?

0 Answers  

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difference between buscoupler & bussection?

1 Answers  

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what are factors comes under relay setting (distance relay 7sa52) under OPEN DELTA VTs connection??

0 Answers  

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what is bjt & mosfet? what is rectifier & diode?

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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