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What are methods to avoid the inrush current at the time of
starting of power transformer ?
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Answer Posted / suresh kumar
We cannot avoid inrush current when any transformer is
switched on after a long period of shutdown. Only thing we
can do is minimising it by charging the transformer by the
lowest voltage (using tapp changers)and we can avoid
spurious tripping by inrush current by using only
transformer differential relays in which an inrush current
filter is used.
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