And connect to both magnetic contactors a1 a1 terminals. Ol over load relay no normally open nc normally close rev reverse for forward.
Sh 9957 Control Forward And Reverse For A Threephase
How to wire a 3 phase motor forward and reverse. One of them contactor is forward contactor and other is reverse contactor. For that we use two magnetic contactors. Here i shown reverse forward motor control circuit diagram 2nd part which is about the controlling wiring of reverse forward reverse starter. Nc and no switches to stop motor to run motor forward or reverse. Output of mcb has to connect with two contactor. However if so desired the motor can be reversed by switching the order of the phases.
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. 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. The neutral wire first goes to the thermal overload relay nc contacts and to the light indicator. Each power lead is a phased 120 degrees apart from the other two leads making them perfectly balanced. In the below controlling diagram i shown the complete controlling wiring of forward reverse 3 phase motor starter. 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. In order to reverse the direction of an ac motor the magnetic fields must be altered to provoke movement in the opposite direction. 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. This post is about the 3 phase forward reverse motor control circuit diagram. Two speeds two directions tapped wound multispeed 3 phase motor control diagram.
In the power diagram of the forward reverse starter connect the three phase supply to the input of the mcb. From the 2nd thermal overload relay normal close contacts the supply goes to the both contactors coil contactsterminals. 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
