Answer Posted / dinesh kumar

I decid CT rating acording current and PT acording Voltage.
if current flowing in cable apox 300 amp and my ammeter
rating is 5 amp. than we will use CT rating of 60/1. similr
PT. But we mind that current of cable could be increse any
time thn 60/1 CT will be fail.

sourse is 66 KV / 350 MVA, transfarmer is 1000 KVA 6.6 / 0.415 kv, iF fault is 28.75 MVA on 0.415 KV Bus then calculat the Transfarmer Impidance

2051

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how we calculate the withstansing current capacity of wires&cables?

1965

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We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

1866

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What is the effect of solar radiation on the design of an Isolated Phase Busduct?

2299

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Explain the construction of the conservator, operation and purpose, and draw the diagram of the conservator.

2456

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Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

2162

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With a phasor diagram show the effect of increasing the field current of a generator supplying a constant real power and connected to a grid system.

1904

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Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.

2129

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What is the difference between earthing,ground&nutral?

6498

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how load of a turbo generator can be increased

1894

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Define damping ratio.

1186

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What is the technical difference between On delay timer and a Star delta timer?

1559

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if 12v battery get discharged for 2 months after if we put charge it will charge again?how much time it will take to charge?

1875

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Explain about retrofitting of machine tool.

1848

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which types of relay used in acb and vcb?

2686

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