Answer Posted / pramod sharma

according to bis 3043 1987 one earthing to another distance minimum 3 mtr techinacl reason is if earthing distance lass than 3 mtr than surface area is overlaping and fault curreent desipate to earth. also depend soil restivity and appplication load

Single line digram for 11 kV to distribution use go,la and do

1822

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What is effect of over voltage and under voltage on ACB

1996

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what is plunger and what's the use of it in motor alignment?

2651

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Please explain me about Relay curves and their sources to read ?

1814

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We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.

1875

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pre arcing time of ehv breaker

2137

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what is a bus riser in power system and why it is used

46226

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11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter

1931

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What is the use of oil in transformers?

1106

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I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

1876

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lorteny method

2007

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How to Make relay co ordination chart for a Electrical power distribution of a plant

3845

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can u give me a brief idea about power line carrier communication ??

1854

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If breaker is undefined position, first step to do.

2272

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is it possible to turn on the single phase star delta on delay timer using 24 v dc ?

2055

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