single phase for 230 then why three phase are 440 volt

4 Answers   ACIL,

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how to deside the capacity of chock for drive?

0 Answers   Essar,

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how to fit 3 HP crompton gear motor with conveyor with the use of staring delta starter or ordinary starter?

0 Answers  

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if vcb make contact but output notreach give the reason?

2 Answers   VVF India,

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We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?

0 Answers  

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Why does a TV set have two pin plug whereas the moniter of a computer has three pin plug? Isn't the earthing protection required for the TV set

2 Answers  

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Whether earthmat designning is done only for sub station or it can be done for multy residential complexes also? What is the size, type & arrangement of the earth grid to be done?

1 Answers  

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what is mean by unity power factor?why are u calling Resistivity load also unity power factor?

2 Answers  

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What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.

0 Answers   DAE,

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How to determine the Power factor is Leading,Lagging & Unity ?.I don'thave any Meters.

3 Answers  

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why transfromer rating gives in MVA Or KVA? Why not in MW or KW?

6 Answers   GIL, Siemens,

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When batteries are connected in series the voltage increases but the current remains unchanged, how can this be? When you consider ohm's law. i.e. If voltage increases, current increases, providing resistance remains the same.

10 Answers  

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