After connecting a 440V, 3-phase motor, which aspect must be verified for proper function?

Verifying the rotation direction of a 440V, 3-phase motor after connecting it is crucial for ensuring proper function. Most 3-phase motors are designed to rotate in a specific direction based on the sequence of the electrical phases. If the rotation direction is incorrect, it can lead to mechanical issues such as improper operation, increased wear and tear, or even damage to the motor or connected machinery.

In many cases, switching any two of the three-phase leads will reverse the motor's direction, making it necessary to test this aspect during startup. Proper rotation ensures that the motor is performing its function efficiently, such as driving a load or performing work as intended.

While aspects like voltage levels, current draw, and heat generation are indeed important for the overall function and health of the motor, the priority at the initial connection stage should be to confirm that the motor is spinning in the correct direction. Ensuring the right rotation direction is essential before proceeding to monitor other operational parameters.