why we have and use 3 phase not 2 or 4 or other in power system?

0 Answers  

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Application wise, where we should use AC motors and where we should DC motors?

1 Answers   Nespak,

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List out the different frequency domain specifications?

0 Answers  

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Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere

0 Answers   Kazi Farms, SKI Carbon Black,

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Why saturation region slowly shifted in the left side?

0 Answers  

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why we not using 230kv directly why we are stepping down and then stepping up

2 Answers   Siemens,

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In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

3 Answers  

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what is the function of open delta System?

1 Answers  

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how to calculate capacitor rating for an induction transformer ex.for 12 mva furnace calculate capacitor rating

2 Answers  

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How maesure earth neutral value & how much maximum value value required in between earth & neutral.

0 Answers   Bellsonica, NEC,

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plz tell me about BACK emf and how it generates?

2 Answers  

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Why in USA supply voltage parameters(230V,60Hz)are different,is there any advantage please brief.

1 Answers   APC, DRJ ARDE,

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