Thus C1 Contactor is also energized and Three Phase Supply will reach to the motor. When C3 is energized, its auxiliary open links will be closed and vice versa (i.e. Contactor coil C3 and timer coil (I1) is energized at once and the motor winding then connected in Star. This way, the circuit is completed, as a result Operation & Working of Automatic Star Delta Starterįrom L1 The phase current flows to thermal overload contact through fuse, then OFF push button, On push button Interlocking contact 2, and then C3.
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