Which of the following can change the direction of a 3-phase motor?

Swapping any two T-leads, also known as phase leads, is the correct method to change the direction of a 3-phase motor. In a 3-phase motor, the direction of the magnetic field generated by the windings determines the direction in which the motor rotates. By interchanging two of the three phase leads, the sequence of the power supply phases is reversed. This reversal changes the direction of the rotating magnetic field, thereby reversing the rotation of the motor.

This principle leverages the fact that 3-phase systems create a rotating magnetic field, which is essential for the motor's operation. Each phase leads to a different time delay in the power signals, and rearranging the leads alters the phase sequence. Consequently, this makes it an effective and standard method for reversing motor rotation without any mechanical alterations or changes to the motor hardware itself.

Other options like altering the power supply, swapping out the motor, or adjusting control settings would not directly affect the rotational direction as effectively as the method involving the phase leads. Altering power supply might affect performance or efficiency, while swapping the motor would only provide a different motor and not necessarily change the direction of the original motor's operation. Adjusting control settings may influence variable speed or torque but does