In a three-phase motor, what does an incorrect phase sequence cause?

An incorrect phase sequence in a three-phase motor causes the motor to rotate in the wrong direction. The direction of rotation for three-phase motors is determined by the order in which the phases are connected to the motor. If the sequence of the phases is altered, the magnetic field generated within the motor will also reverse, which results in the rotor turning in the opposite direction than intended.

This aspect is crucial in applications where motors need to perform specific tasks, as an incorrect rotation can lead to improper operation of machinery, equipment damage, or safety hazards. Therefore, maintaining the correct phase sequence is essential for the proper functioning of three-phase motors.