Final answer:
Dual-voltage 3φ motors have windings that are connected in parallel for low voltage operation, to maintain proper functioning at the reduced voltage level.
Step-by-step explanation:
Dual voltage motors are electrical devices which transform electrical energy into mechanical energy. They may be use either of the two stated voltages but are wired differently to maintain the motor output.
When connecting a dual-voltage, 3φ motor for low voltage, the windings are connected in parallel. This configuration allows for a lower voltage to be used across each set of windings, ensuring the motor operates properly at this voltage level.
Motors with dual-voltage capabilities have windings that can be connected in either series or parallel, with parallel connections used for low voltage operations and series connections for high voltage operations. A dual power supply allows for proper biasing, amplification, and operation of these devices, enabling them to function optimally.