difference between dol and rdol startors?

2 Answers   Vijai Electricals,

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why we use DO Fuse in H.T. Line ? What is the purpose of DO Fuse

4 Answers  

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why should we have to maintain pf in our site 0.9????????

3 Answers   Dalkia,

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If ct ratio is 250/1 and mtr is of 5 amp, what will be mf?

1 Answers  

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How do you maintain the batteries for generators, what is the daily maintenance of a generator?

2 Answers   Jindal,

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what is the working principale of air circuit breaker ?

5 Answers  

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what is the difference between gas group b and gas group c electrical equipment construction wise?

0 Answers  

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Why is the diffrential protection in DG. What if the CT polarity is reversed while connecting for the same type of protection? How polarity can be made ok?

1 Answers  

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How can we select a capacitor Bank.? i need a standard formula for that.?

3 Answers   ABB, Ace Info, HAL, IKK, MahaGenco,

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i have ht transformer of 142 kva with air cooled facility,having secondary voltage 7850volt, and secondary connected full way bridge rectifier .i faced the problem repeatedly that transformer one coil and rectifier diode of two phase was burnt two times. i checked all the secondary ckt. no any short ckt found,then what will be the cause side

2 Answers   Modern Terry Towels,

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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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What is rms value wher it is used??????????

1 Answers  

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