why using 3 phase

1 Answers  

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What_is_mean_by_negative_dc_voltage? why we use -48v except +48v in DC power supply systems.

2 Answers   APEL, BSES,

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any body know about lighting arrestor. how to determine the height of lighting rod from top of bulding and how many area it cover.

1 Answers  

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why the impedence of the transformer is expressed in percentage?

3 Answers   DEWA,

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In a company has been installed an analog amperemeter, this company was suplied by generator X, there is no problem in the ampere meter, rigth now this company's supplied by generator Y then the pointer in amperemeter vibrating. What happened? Why? Thank's

2 Answers  

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What are the reasons for the parallel operation of transformers?

0 Answers  

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why we choose 50 or 60 hertz not other value for the power system?

4 Answers  

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Why is tan-delta test and capacitor measurement done on alternator?

0 Answers   TD Power Systems,

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Do you have any P.L.C in your organization?

12 Answers  

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how to test the ht machines?

0 Answers   ONGC,

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what is O.T?specify the acceptable range?

2 Answers  

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why we use carbon brush in exciter&genrator?

5 Answers   ABB, SMC,

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