## Tuesday, July 4, 2023

How to find out the DIRECTION OF ROTATION of an ELECTRIC MOTOR

It is common to have situations where we install a three-phase electric motor and when we energize it, we realize that the direction of rotation is wrong, so we need to reverse the rotation of this motor, but how to reverse the rotation of a three-phase motor and change the direction of rotation.

Changing the direction of rotation of the three-phase electric motor is not difficult, for that we basically need to invert two phases of the three that are connected to it.

Doing this inversion of phases, the direction of rotation of the rotating electromagnetic field will also invert, so we can make the motor rotate to one side or the other.

There are situations where we need to constantly invert the direction of rotation of the three-phase motor, in which case we use two contactors to make this inversion.

When one of the contactors is activated, the motor will turn to one side and when the other contactor is activated, the motor will turn to the other side, but a detail of this technique is that the two contactors can never be activated at the same time, in case this may cause a short circuit between two phases.

And to resolve this situation, we make an interlock between these two contactors, when one is activated, the other cannot be activated.

Another detail is that we can identify the sequence of phases of a three-phase system, using a motor, when this sequence is correct as we know RST, the motor will rotate clockwise and when the sequence is not correct, the motor will rotate clockwise. counter-clockwise.

As inverting the three-phase motor rotation and changing the direction of rotation is widely used within the industry, it is quite common to have to change this configuration so that the machine or equipment can function correctly.

How to find out the DIRECTION OF ROTATION of an ELECTRIC MOTOR

It is common to have situations where we install a three-phase electric motor and when we energize it, we realize that the direction of rotation is wrong, so we need to reverse the rotation of this motor, but how to reverse the rotation of a three-phase motor and change the direction of rotation.

Changing the direction of rotation of the three-phase electric motor is not difficult, for that we basically need to invert two phases of the three that are connected to it.

Doing this inversion of phases, the direction of rotation of the rotating electromagnetic field will also invert, so we can make the motor rotate to one side or the other.

There are situations where we need to constantly invert the direction of rotation of the three-phase motor, in which case we use two contactors to make this inversion.

When one of the contactors is activated, the motor will turn to one side and when the other contactor is activated, the motor will turn to the other side, but a detail of this technique is that the two contactors can never be activated at the same time, in case this may cause a short circuit between two phases.

And to resolve this situation, we make an interlock between these two contactors, when one is activated, the other cannot be activated.

Another detail is that we can identify the sequence of phases of a three-phase system, using a motor, when this sequence is correct as we know RST, the motor will rotate clockwise and when the sequence is not correct, the motor will rotate clockwise. counter-clockwise.

As inverting the three-phase motor rotation and changing the direction of rotation is widely used within the industry, it is quite common to have to change this configuration so that the machine or equipment can function correctly.