800a siemens vcb in our company can not be closed electrcally an mechanicaly cc and oc coils are found ok. why?

2 Answers  

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what would happen if reactive power (kvar)is increased (more)or decreased (less)? how much exact reactive power should be maintained? and what should be done for that

0 Answers   ABB, Siemens,

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How to calculate KW saving for power factor correction from 0.92 to 0.98 at 350KW load?

5 Answers   Heidelberge Cement,

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if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current

0 Answers  

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How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

0 Answers   Alka Electromech, Aramco,

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what is the importance of earthing system on the generators big capacity and small?

0 Answers  

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what is the diffrance between earthing and grounding...?

6 Answers   Essar,

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Does the total power means fundamental plus Harmonics?

2 Answers  

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Generator,motor and alternator Working principal Please explain easily

0 Answers  

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Why did lightening arrestor solid copper rod head is sharp on mobile tower top?

0 Answers  

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what is the use of vector group in transformer. means what r the application of various vector groups?

5 Answers  

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Alternators are invariably star connected why?

4 Answers  

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