Why fuel tanks to be earthed ?

6 Answers   Electronics, Hindustan Petroleum, HPCL, Ispat,

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3 ph motor connected in star delta starter. when we start the motor it run in star but when in is going in delta it trips the main incoming supply. why?

3 Answers   Bajaj Hindusthan,

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Is it possible to get earth resistance value"zero" Ohm practically??? If yes,which type of earthing???

9 Answers   TATA,

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What is thermal relay and how it is works in transformer please explain

2 Answers   Future Group,

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What will be the effect if I use inverter as UPS mood?

0 Answers  

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Will u plz give me simple diagram for tube light connection & also function of chock?

8 Answers   Bhushan Power Steel, Dalmia Group, Jindal, Practical Viva Questions, TCS, Windmoller,

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Difference between ups

32 Answers   Emerson, Tata Power,

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On what cycle does thermal power plant operate?

0 Answers  

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How will I know that how many batteries I should connect to my UPS unit?

3 Answers  

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What happen in ups if phase reverse?

0 Answers  

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What is the relation between frequency and motor rpm?

0 Answers  

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what is meant by motor startup supervision & motor load jam protection ?

0 Answers   ABB,

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