Dual voltage is a reference to a motor that can use either of two different voltage levels, usually 230V or 460V. The motor windings have multiple taps, and the connections vary depending on which voltage is used. Dual wound motor refers to two windings in one motor frame, and can be any combination of poles. With the increased amount of copper, the frames are usually twice the size of a standard motor. A dual wound motor can be used in a drive application with one of the windings not hooked up, but we do not recommend this. It is similar to a round rotor motor with the secondary shorted. The insulation properties are not sufficient to handle PWM.
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