is it necessarry to charge the battery of ups always??

3 Answers  

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When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

0 Answers   TATA,

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75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

0 Answers  

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how does calculate loss correction factor in transformer

1 Answers  

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what is corona ?

3 Answers  

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in fuel level controller what is MOV please define.

2 Answers  

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What is the constructional difference between ceiling fan and table fan

2 Answers  

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what is slip ring induction motor? How it works?

1 Answers  

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What is the real function of reverse power relay in generator panel while syncronising?

0 Answers   Triveni,

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explain Xmer

2 Answers  

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What is the basic principle of welding process?

0 Answers  

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what happens if i connect acapacitor to a generator load

5 Answers  

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