Answer / k.prakashchandra

This may be due to line earth fault . Disable generator instant trip due to earth fault and use only time delay of 200 - 500 ms

Explain the working principle of Synchronous Generator and Assynchronous generator?

11 Answers   TATA,

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on what factor insulation resistance depends

2 Answers   Uttam Sugar,

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why capacitor is not discharged phase to body

1 Answers  

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Why HT motor is connected in Star?

3 Answers   Equate,

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Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.

0 Answers  

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what is the formula to calculate voltage drop/loss on 66KV Transmission Line?

0 Answers  

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If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.

0 Answers   MEIL,

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for a 400kv t/m line with 10 ampere current will corona occur?

0 Answers   NPCIL,

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what is meant by a slip?

10 Answers  

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How we can calc. the Backup time of a battery Bank???

6 Answers   Emerson,

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how to calculate the battery Ah? what is the formula.

10 Answers   Cushman Wakefield,

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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