Answer / hanumeshpatil

Overhead Transmission Lines
Sub transmission Lines.
Underground transmission lines.

why transformer comes only in standard rating like 11kv,33kv,66kv....and not like 33.33kv and so on?

3 Answers  

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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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Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

0 Answers  

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DC transmission

0 Answers  

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what is the use of earthing ?

8 Answers   Electrical Tech,

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how much the voltage & resistance should be ,between earth & neutral points.?& why?

6 Answers  

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What is creepage distance..... what will be the value for different voltage level

0 Answers  

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While testing a ZCT what parameters have to check or measure?

0 Answers   Indian Railways,

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The speed of a dc motor can be controlled by the variation of 1. armature voltage. 2. field current. 3. armature circuit resistance. 4. angle of brush shift. Which of the statements given above are correct? (a) 1,2 and 3 (b) 2,3 and 4 (c) 1,3 and 4 (d) 1,2 and 4

1 Answers  

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Is it a better option to procure screw type air compressor rather than reciprocating air compressor?If so, what is the reason?How should we select an air compressor(100 CFM)? Please mention the important parameters of air compressor.

0 Answers  

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how to compute kAIC?  with formulas...

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How many points does a Circuit can have?

0 Answers  

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