Auto Transformer Starter Control Circuit Diagram. In this method the starting current is limited by using a three phase auto transformer to reduce the initial stator applied voltage. Connected with the primary winding to the power circuit secondary winding to the control circuit.
An auto transformer starter is suitable for both star and delta connected motors. This arrangement start an induction motor with reduced voltage and the value of voltage depends upon the ratio of tap selected. Variety of control transformer wiring diagram.
Stage 1 at starting auto transformer is star connected by activating star contactor km1 and then the run contactor km2 is closed.
Autotransformer starter circuit autotransformer starter equivalent circuit. Connected with the primary winding to the power circuit secondary winding to the control circuit. A wiring diagram is a simplified traditional photographic depiction of an electrical circuit. When the start button is pressed a circuit is completed to the coil of main contactor m timer tr and shorting contactor s.
