can anyone give an idea about dia calculation in cold rolling mill

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How capacitor improves pf

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a 50hz motor to give 60hz whats happening in motor.what happen the motor.

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Do I need a special Transformer to put 240 VAC 3 phase into it and and get 480 VAC 3 phase out of it to run a machine? Or, do I just use an ordinary step down transformer and step up the voltage? Thanks

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For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

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what is the diffrence between capasitor and battery?

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What is the meaning of Insulation H for transformers????

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Does magnetomonopoles exists? one maxwell equation strongly suggests no, but how about their existance in plasma?

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how meger function

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why generator and t/f ratings given in kva?

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HOW TO FIND THE PRIMARY AND SECONDARY OF TRANSFORMER(IN OFF CONDITION) USING MULTIMETER? IS IT POSSIBLE FIND BY SEEING RESISTANCE???

4 Answers   Areva,

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what is the use of the puls transformer in UPS & how it works???????????

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