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  1. bofu2000

    Selection of Tap Changer on Transformer

    You never operate an off load tachanger with the transformer energized. The tap changer contacts are not made for thatAn off load tapchanger has its own advantages like low cost and little or no maintenance.
  2. bofu2000

    Motor Contribution to Fault Current

    The behaviour of motors is such that, in the event of a fault, they behave like generators for a few cycles, so the motor contribution is to be added, just as you do for the generators.

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