Motor Star Delta Connection Diagram. The connection diagram of star delta starter consists of the following devices three pole mccb 1 nos single pole mcb 1 nos 440 v three pole contactor 3 nos three phase thermal overload relay 1 nos 220v on delay timer 1 nos nc push button switch 1 nos no push button switch 1 nos 220v indication lamps red green yellow. In this tutorial we are going to show the star delta y δ 3 phase induction ac motor beginning technique by automatic star delta starter with timer with schematic power management and schematic also as however star delta starter works and their applications with blessings and drawbacks.
It is used for starting a squirrel cage induction motor which is designed to run normally on delta connected stator winding. File type pdf 3 phase motor star delta connection diagram ebooks in actual motor the three phase connections are provided in the following order as shown. The main km3 contactor is closed and the delta km2 and star km1 contactors are open.
This energized star contactor coil and motor get connected in star.
Electric motor star and delta wiring and link connections jpg 416 603 electrical circuit diagram electrical installation electric motor. As you see in the above star delta starter diagram first an nc push button switch is connected to stop the operation. Current flows through the motor windings and the transition resistors via km4. Delta connection terminal motor.