Answer Posted / rajkumar85

the diffrent parts in star delta starter are star contactor,
delta contactor, main contactor and mainly timer.when you
press the START button first the star contactor will engage,
and closes its contacts.at the same time main contactor also
engages through n.o of star contactor.the timer is cut the
star contact supply after a preset time delay then engages
the delta contact in to supply lines.now motor will run in
delta, (full speed).

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