Transformer rating=> 15/20 MVA.Why there are two raings? What should be the rating of the fuse at the secondary if the voltage level is 13.8KV/4.16KV?

1 Answers   Bhel,

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in trains i have seen the terminal which is connected at the top of the train is positive .where is negative ? track? i dont think so

9 Answers  

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What is an ac motor?

0 Answers  

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What is basic difference between Soft Starters And VFD drives?

19 Answers   IBM,

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what is the surge arrestor?how it operates?what is the range for it?

4 Answers  

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Draw an S.L.D of the main panel for a hospital, showing meter position. Essential loads are: 1) Equipment load 100 KW 2) Critical load 500 KW 3) Life AID Safety load 400 KW 4) NON-Essential load 200 KW 5) Other service loads 200 KW Calculate and suggest the size of the transformer, size of main cable, capacitor bank, and calculate the capacity of an emergency load having above first three mentioned loads is supplied by an emergency generator.

0 Answers   FEWA, HMK,

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What is an Antipumping relay ?

4 Answers  

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where HT & LT capacitor uses ?

2 Answers   NTPC,

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What are operating procudures & Safety precautions to be observed while operating OLTC in manual mode ?

0 Answers   NTPC,

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how cables go in and come out for distribution from the feeder pillar box?

0 Answers   CESC,

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Which type of Oil is used in transformers, & what is its strength?

1 Answers  

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How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

0 Answers   Elektrotek,

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