Star Delta Starter for 3 Phase Induction Motor:
The stator winding of the motor which is designed for delta operation is connected in star during starting period. The arrangement is shown in the above figure; here six leads of the stator windings are connected to change over switch. At the instant of starting the switch is on the “Start” position which
connects the stator winding in star connection so that each stator phase gets the reduced voltage VL/√3 volts, where VL is the line voltage. The application of reduced voltage reduces the starting current and protects the motor from high starting current.
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