L T Mk1 Star Delta Starter Wiring Diagram. The power circuit uses to create contact between the motor and three phase power supply. Automatic star delta starter with timer for 3 phase ac motors.
As i stated my aim is to make this an easy to follow and enjoyable training experience so before diving into the wiring of a star delta starter i d like to teach you a little bit about what a contactor is and how it actually works. Typical circuit diagram of star delta starter main circuit control circuit for push button control momentary command s0 off push button s1 on push button k1 line contactor k2 star contactor k3 delta contactor k4 star delta timer 7pu60 20 f2 overload relay f1 backup fuse f3 control circuit fuse. Automatic star delta starter with timer for 3 phase ac motors.
Key diagram mk1 semi automatic a2 b2 c2 to motor terminals c1 a1 b1 a b c 5 a b c to supply r y b p1 p2 p3 p4 h b p1 stop reset p2 p4 p3 k h 5 no start nc nc h r stop reset r y b r y b a b c r y b start mk1 sasd 0.
Automatic star delta starter with timer for 3 phase ac motors. Lt mk1 star delta starter wiring diagram. Refer to the below star delta circuit. R y b red yellow blue 3 phase lines c b general circuit breakermain mai supplyy starĪ“ deltac1 c2 c3 contatcors power diagram o l over load relayno normally opennc normally closed k1 contactor contactor coil k1 no contactor holding coil.
