Each power lead is a phased 120 degrees apart from the other two leads making them perfectly balanced. Ol over load relay no normally open nc normally close rev reverse for forward.
Forward Reverse Starter Diagram Engineering Portal
How to wire a 3 phase motor forward and reverse. One of them contactor is forward contactor and other is reverse contactor. However if so desired the motor can be reversed by switching the order of the phases. This post is about the 3 phase forward reverse motor control circuit diagram. For that we use two magnetic contactors. In the above 3 phase motor forward reverse wiring diagram. As you know that if we change one phase with other phase the 3 phase motor change the rotation direction.
When each phase of the three phase system is connected to its proper terminal in the three phase motor the motor runs forward as it was designed. From the 2nd thermal overload relay normal close contacts the supply goes to the both contactors coil contactsterminals. Here i shown reverse forward motor control circuit diagram 2nd part which is about the controlling wiring of reverse forward reverse starter. Output of mcb has to connect with two contactor. The neutral wire first goes to the thermal overload relay nc contacts and to the light indicator. And connect to both magnetic contactors a1 a1 terminals.
In the below controlling diagram i shown the complete controlling wiring of forward reverse 3 phase motor starter. In order to reverse the direction of an ac motor the magnetic fields must be altered to provoke movement in the opposite direction. Since each wire consists of a positive and negative current within the magnetic fields the flip flopping of main and starter wires causes the motor to run in reverse rotation. In the power diagram of the forward reverse starter connect the three phase supply to the input of the mcb. Two speeds two directions tapped wound multispeed 3 phase motor control diagram. 2 speeds 2 directions multispeed 3 phase motor power control diagrams abbreviationsol over load relayno normally opennc normally closelow low speedhigh high seed for forwardrev reverse two speeds two directions multispeed 3 phase motor power diagram power diagram.
Or how make a forward reverse 3 phase motor starter. Nc and no switches to stop motor to run motor forward or reverse. Three phase motor connection reverse and forward power and control wiring diagrams two direction one speed abbreviations.
Gallery of How To Wire A 3 Phase Motor Forward And Reverse
