Phase sequence verification is performed to ensure what?

Phase sequence verification is performed to ensure what?

• A. Phase sequence verification ensures correct rotation direction.
• B. It causes motor stalls.
• C. It is unrelated to rotation.
• D. It increases power consumption.

Answer: (A)

Phase sequence verification checks the order of the three supply phases to ensure the rotating magnetic field moves in the intended direction. In a three-phase motor, the sequence of voltages determines which way the magnetic field rotates; a wrong sequence makes the motor run in the opposite direction or behave unpredictably. Verifying the sequence confirms that the motor will start and run with the correct rotation and torque. It doesn’t inherently cause stalls, is not unrelated to rotation, and doesn’t aim to increase power use.

Phase sequence verification checks the order of the three supply phases to ensure the rotating magnetic field moves in the intended direction. In a three-phase motor, the sequence of voltages determines which way the magnetic field rotates; a wrong sequence makes the motor run in the opposite direction or behave unpredictably. Verifying the sequence confirms that the motor will start and run with the correct rotation and torque. It doesn’t inherently cause stalls, is not unrelated to rotation, and doesn’t aim to increase power use.