How many windings per phase do dual-voltage 3-phase motors have?

Dual-voltage 3-phase motors are designed with two separate sets of windings per phase. This configuration allows the motor to operate at two different voltage ratings, typically a lower and a higher voltage. Each set of windings can be connected in a way that optimizes performance for the corresponding voltage level.

When the motor is connected for operation at the lower voltage, one set of windings is utilized. Switching to the higher voltage involves connecting the motor so that it utilizes the other set of windings. This design is particularly advantageous in applications where flexibility in voltage supply can enhance efficiency and is often seen in industrial settings.

Having two windings per phase enables the motor to maintain operational integrity under varying supply conditions, ensuring reliable performance while adhering to electrical codes and manufacturer specifications.