Description:
In the case of a wye-delta closed transition type starter, a set of resistors is connected to the motor winding before the delta contactor is closed. These resistors are used to balance the back EMF of the motor and the line voltage before closing the delta contactor. Closed transition eliminates the surge current that occurs when transferring the motor from wye to delta connection, thus providing a smoother acceleration of the motor from reduced voltage to full voltage.
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