Answer Posted / pramod koshy mathew

static device is a device which does not cnsistin of any
moving instruments.
mechanical devices consisting of moving components to creat
force.
since transformer does not consisting of any movings
components for creating flux it is consider as a static
device

what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.

2429

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why magnetising curve not start with zero voltage?

2294

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2026

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2917

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we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

1918

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Why auxiliary transformers are not connected in parallel in primary stations?

1426

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75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

3726

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harmonics filter

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2169

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