forward and reverse motor starter diagram

Read the related article to the Forward Reverse Starter Diagram:. two push button is fed with two elements each push button one is NO and other is NC.

the stop button is used to stop the process. you can also take two start push buttons and a stop push button. Note:- Here are four push buttons are shown in the diagram. Connect the neutral wire to the A2 of the contactor.

After holding connect the wire from the output of the start push button to the A1 of both contactors. Then connect two wires from the input and output of the push buttons to the NO point of the contactor for holding of the contactor. Then the output of these NC points connects to the Start push buttons. After that wire has to connect with NC points of the contactor of opposite directions as shown in the diagram e.g for the forward contactor connect to the NC point of reverse contactor and for the reverse contactor connect to the NC point of the forward contactor. The output of the MCB has to connect with the overload relay NC point for reset. Push Buttons – Two push buttons are used here one of them is for the forward direction and the other push-button for the reverse direction.Īs shown in the diagram, we need to connect the power supply in the MCB (Miniature Circuit Breaker). Over Load Relay – Over Load Relays are used to protect the motor against various types of faults like overloading, over-voltage, under-voltage, single phasing, etc.Ĭontactors – Two contactors are used one for the forward direction and the other for the reverse direction. MCB – Two-pole MCB used for Control wiring and 3 pole MCB used for the power wiring. These types of starters are used in various applications e.g- mixing of materials, dying machines, etc. To run the motor of above 05 HP rating circuit has to made in star delta.

These forward and reverse starters are dol type and not used above the 05 HP motors. The figure given below shows the control and power diagram of the forward and reverse starter diagram. As the name defines forward reverse starter is used to run the motor on both sides forward and reverse. The NPN transistor BD 139 drives the output from timer IC, this output pulse duration decides the speed of DC motor, by varying the VR1 resistor we can vary the pulse output of timer.In this article, we are going to learn about the forward-reverse starter. The diode D1 protects the DC motor from the back emf effect hence there is no output load effect rise. The DC motor is connected to the supply through DPDT ( double pole double through ) switch, by changing the switch position we can get forward and reverse rotation from the DC motor because this switch interchanges power supply polarity applied to the DC motor. In this website we already published about Speed control of DC motor with timer IC, here this circuit constructed for the basic motive to meet the forward / Reverse operation of DC motor with speed control.

Forward and reverse motor starter diagram