what is reactive and active power?why we need power factor correction?

2 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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HOW TO WORK A VFD?SAY SIMPLE METHOD

1 Answers   GE,

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Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?

0 Answers  

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After completing iti in electrician, how can i get certificate of electrical supervisor? What ia requirements. For it?

0 Answers  

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what is the difference between 'Control Transformer & Potential/Voltage Transformer'?

2 Answers  

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in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain

0 Answers  

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How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f used in Canada is to be operated on 50 hz in Europe frequency then how will its KVA rating change? a-increase b-decrease c-remains same

1 Answers  

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difference between relay and solenoid?

2 Answers  

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How many types oil using in transformer ? How many letars using in transformer..?

0 Answers   TATA,

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srij i need the relationship b/w KW AND KWH and with an electrical example. plz send if u can?

4 Answers  

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why core is useful for a transformer ?and also in its operation ?

0 Answers  

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