Electrical Wiring Diagram Star Delta Control and Power Circuit Using Mitsubishi PLC Program

This article is intended to diagrammatically demonstrate the concept of the wiring principle of a star delta (wye delta) motor control and power circuit when using a PLC (Programmable Logic Controller) ladder program to control the switching of a 440 volts induction motor.

Power Circuit of a Star Delta or Wye Delta Forward Reverse Electric Motor Controller - A basic industrial process automation control how to do guide for reversible star (wye) delta motor controller

Our previous article covered a typical star delta or wye delta motor controller which is focused on a common circuit intended for a single rotational direction of a 3 phase AC induction motor. But certain star delta motor control applications would also require a reversible motor rotation.

Power Circuit of a Star Delta or Wye Delta Electric Motor Controller - A basic how to guide

Reduction of the AC induction motor's starting inrush current is achieved by implementing an interchanging star delta or a wye delta connection of the motor, this can be done by incorporating a configured star delta connection of the motor by using magnetic contactors or magnetic starter switches. The diagram below illustrates this type of motor switching connection used in every electrical industry involving industrial process automation control technology.