The windings of a 230/460-volt, dual-voltage, wye-wound motor are connected in what configuration when the supply circuit is 480 volts?

The correct configuration for the windings of a 230/460-volt, dual-voltage, wye-wound motor when connected to a 480-volt supply is indeed parallel. In a dual-voltage wye-wound motor, the winding connections can be configured to accommodate different supply voltages based on the requirements.

When the motor is designed for 230 volts, the windings are typically connected in parallel. This configuration effectively halves the voltage across each winding, allowing the motor to operate correctly at a lower voltage. In contrast, when the windings are connected for 460 volts, they are arranged in series, allowing the full supply voltage to be utilized.

If connected to a 480-volt supply, the system needs the windings to be configured to handle this voltage appropriately. Therefore, parallel connections for the lower voltage ensure safety and proper operation, aligning with the specification of the motor.

This understanding is crucial when working with dual-voltage motors to ensure that they are wired correctly for the intended voltage to prevent potential damage or operational failures.