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what is the difference between DOL starter&star-delta starter&
automatic star-delta starter
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Answer Posted / bosky babu
DOL means Direct On Line Starter, can be used up to 7.5 HP Motor, and for above 7.5 HP to 150 HP a star delta starter is used.In automatic star delta starter, a timer is used to switch on the delta contactor. For higher HP ratings VFD (variable frequency drives) can be used.
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