Reverse and Forward Control Diagram

Reverse and Forward Control Diagram

Power Wiring OF Reverse And Forward Motor

Power Wiring of
Reverse and Forward Motor

For three-phase motor forward reverse negative feedback circuit. We use 2 ‘magnetic contactors’ as forwarding reverse switches. Here I showed the forward-reverse schematic. within the diagram, I connect the incoming three-phase supply L1, L2, L3 to the MCCB breaker (molded case circuit breaker).

And from the MCCB breaker, I connect the availability to both ‘magnetic contactors’. Here the L1 is connecting to both contactors' first terminals. L2 wire connected to both ‘contactors’ 2nd terminal. And L3 wire connected to both ‘contactors’ 3rd terminal.

Current Transformer (C.T) Details.

But the out connection is different. Where L1 is connected to the T1 terminal and connected to the T3 terminal in the 2nd magnetic contactor. The L2 is connected is both contactors in the same terminals (T2). The L3 is connected to the T3 terminal in the first contactor and in 2nd contactor in the T1 terminal.

After that, the three-phase supply goes to the thermal overload relay and from the thermal overload relay, the soppy goes to the three-phase motor connection plate and is provided to the three-phase motor. Here I even have shown the forward-reverse control diagram for 3 phase motor.

Reverse And Forward Control Diagram

Reverse and Forward ControlWiring Diagram

Forward reverse control diagram Now comes to the controlling wiring. Here I had shown that both contactors are 220 VAC. this suggests that the contactors also required the neutral wire. within the above 3 phase motor forward reverse schematic. The neutral wire first goes to the thermal overload relay NC contacts and to the sunshine indicator.

From the 2nd thermal overload relay Normal close contacts the availability goes to both contactor's coil contacts/terminals. And hook up with both magnetic contactors A1-A1 terminals. After that, the L1 wire is going to the thermal overload relay NO contacts and from the 2nd thermal relay NO contacts terminal the wire goes to the sunshine indicator.

So if the motor trip the sunshine indicator will glow up. For the Normally close (red/stop) push switch, the availability comes from the L3 in the red color wire. And from the NC switch, the wire goes to both NO switches (forward and reverse push button). And from here the Hold current wire goes to both magnetic contactors NO auxiliary contacts(connection points).

From the forward push switch, the (touch current) supply goes to the 2nd contactor NC auxiliary contacts and from the auxiliary contacts, the wire goes to the primary magnetic contactor NO auxiliary contacts terminal and coil A2 terminal as shown within the above forward reverse control diagram.

The same wiring connection is completed with the reverse push switch. The touch or starting current goes from the reverse push and hooks up with the primary contactor Normally closes the auxiliary contact/terminal and from the auxiliary contacts, the wire goes to the 2nd contactor Normally open the auxiliary contacts/terminal and contactor coil A2 terminal as shown in the above diagram.

In the above connection, if one contractor is energized then another contractor won’t be energized at the same time.

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