The following image shows the control circuit of the push button operated star delta starter. Understanding star delta starter.
Pdf Automatic Star Delta Starter
Control circuit of automatic star delta starter. Semi automatic star delta starter. Star delta connection duration. The on delay timer diagram is also shown in the diagram. The star contactor coil gets supply through phase r off push button on push button t nc star contactor coil d1 nc of delta coil phase y. A star delta starter is a type of reduced voltage starterwe use it to reduce the starting current of the motor without using any external device or apparatus. Ryb electrical 597548 views.
A 8 pin timer are used. This is a big advantage of a star delta starter as it typically has around 13 of the inrush current compared to a dol starter. In the above star delta starter control circuit wiring diagram with timer and normally close push buttonnormally open push button switch. Star delta starter control circuit diagram. Control circuit of star delta starter open transition. This equipmentappliance reduces starting current and starting torque.
In this tutorial we will show the star delta y δ 3 phase induction ac motor starting method by automatic star delta starter with timer with schematic power control and wiring diagram as well as how star delta starter works and their applications with advantages and disadvantages. Controlling the interchanging star connection and delta connection of an ac induction motor is achieved by means of a star delta or wye delta control circuit. The control circuit consists of push button switches auxiliary contacts and a timer. In control wiring diagram all magnetic contactors coils are rated 220 vac. Here the circuit diagram of star delta starter explained in detailhere you will learn the connection of star delta starter with three phase motorthe power circuit diagram and control circuit diagram of an automatic star delta starter are explained belowlets understand the star delta starter diagram. Working of automatic star delta starter control circuit.
This includes the control switch c contact m1 and on and off push buttons. Automatic star delta starter design normally consists of three contactors an overload relay or circuit breaker and a timer for setting the time in the star position starting. Press on push button. In a semi automatic star delta starter we require three contactors for connecting the motor windings is star and delta connections.
Gallery of Control Circuit Of Automatic Star Delta Starter
