in india single phase is 230v and three phase is 440v but in other countries single phase is 110v and three phase is 380v why..?

2 Answers  

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Motor,transformers,capacitor tubelight etc....

0 Answers  

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What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not?

3 Answers   Areva,

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Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

0 Answers  

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what is the different between Switch & Circuit Breaker?

9 Answers  

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What is rotating transformer? Which machine is used specifically as rotating transformer?

3 Answers   TATA,

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how netral CT is selected (including its details specification)

8 Answers   ABB, ABC, dbpl, Mecon, Shree Engineering, Tapasya Transformers,

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if we want to convert the two 12 V DC batteries in parallel for UPS ? what would be the result ? which is better for a UPS , connect two batteries in series or connect them in parallel ?

2 Answers  

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what is the earth resistance ?

5 Answers   Bhel, Cummins,

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why the transformer ratings in kva or mva?

4 Answers  

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for 12KW motor which cable size has to select for ex.10 meter.

4 Answers  

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how to calculate cable size with respect kw

0 Answers   SPMI,

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