Star Delta Starter Wiring Diagram Pdf

In the diagram of power circuit of star delta starter u2 and v2 of 3 phase motor should be connect to 4 and 6 respectively instead of u2 and v2 are connected to 6 and 4 of delta contector km2.

Star delta starter wiring diagram pdf. Each starter is delivered assembled bare cabled by us and contains. This equipment appliance reduces starting current and starting torque. This is a big advantage of a star delta starter as it typically has around 1 3 of the inrush current compared to a dol starter. 1 km1 line contactor 1 km2 star contactor 1 km3 delta contactor the hold in contacts the electrical interlocking contacts for both the star and delta contactors the space for the thermal o l relay direct mounting.

This type of starting is suitable for small motors below 5 hp 3 75 kw. But high load 3 phase motor we use the star delta starter for motor. 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. Star delta starter wiring diagram this post is about the main wiring connection of three phase motor with star delta starter and control wiring diagram of star delta starter.

Automatic star delta starter with timer for 3 phase ac motors. Refer to the below star delta circuit. A dual starter connects the motor terminals directly to the power supply hence the motor is subjected to the full voltage of the power supply consequently high starting current flows through the motor. Star delta connection circuit diagram.

There is minor correction is require to change printed in boxes sequence of 3 phase wires from w2 v2 u2 to w2 u2 v2 to get delta connection properly. Star delta starters consist of a power circuit and control circuit. A star delta starter is a type of reduced voltage starter we use it to reduce the starting current of the motor without using any external device or apparatus. For three phase motor we use the direct online starter but mostly for small three phase motor.

The control circuit uses to control the starter circuit such as on off and tripping operations. The power circuit uses to create contact between the motor and three phase power supply. Star delta connection diagram and working principle.