single phase 230v three phase voltage 415volt why we aren't used line voltage 690v?

7 Answers   Citec,

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How to design harmonic filter at the project stage without nowing the harmonics levels

0 Answers  

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What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter

0 Answers   HCL,

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electricity requires a medium to flow and it cannot flow through air. so how does lightning come to earth through air without any medium?

3 Answers  

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What should be the earthing resistance of an industrial substation and also What should be the house hold earthing resistance?

20 Answers   Jindal, Pharma, TAAT, TATA,

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what is the purpose of taking HV test in LT panel.

1 Answers   PCE,

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what is vibration?

2 Answers  

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Is it a better option to procure screw type air compressor rather than reciprocating air compressor?If so, what is the reason?How should we select an air compressor(100 CFM)? Please mention the important parameters of air compressor.

0 Answers  

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What is the permissible sound level for 1000kva DG set and how the sound level is calculated.

1 Answers  

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TELL ME, WHERE SHALL I GET BASIC ELECTRICAL ENGINEERING BOOKS IN INTERNET?IT SHOULD CONTAIN ALL DEFINITIONS?

0 Answers   TCS,

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How to choose the vector group for the step up and step down transformers??? Tell me the which vector group is suitable for step up and step down transformers and whats the reason to choose and whats the benefits???

0 Answers   L&T,

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Abb 11kv how it is closing automatically when the cb is racking in and rack out when it reaching test position

1 Answers  

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