Dual-voltage motors are?

Dual-voltage motors are?

• A. Either Wye(Y) or Delta connected.
• B. Only Delta connected.
• C. Only Wye connected.
• D. Operate at one voltage only.

Answer: (A)

Dual-voltage motors use the same windings but can be wired in two different configurations to match two different supply voltages. In a three-phase motor, windings can be connected in Delta or in Wye. When wired Delta, each winding is across the line, so the line voltage directly appears on every winding. When wired Wye, each winding is connected from a line to a common junction, so each winding sees the line voltage divided by the square root of 3. The motor is designed so that either configuration delivers its rated winding voltage, allowing operation at two voltages. Practically, this means you wire the motor one way for the lower voltage (Delta) and the other way for the higher voltage (Wye). The device isn’t limited to a single voltage or single configuration; the dual-voltage design is what enables flexible operation.

Dual-voltage motors use the same windings but can be wired in two different configurations to match two different supply voltages. In a three-phase motor, windings can be connected in Delta or in Wye. When wired Delta, each winding is across the line, so the line voltage directly appears on every winding. When wired Wye, each winding is connected from a line to a common junction, so each winding sees the line voltage divided by the square root of 3. The motor is designed so that either configuration delivers its rated winding voltage, allowing operation at two voltages.

Practically, this means you wire the motor one way for the lower voltage (Delta) and the other way for the higher voltage (Wye). The device isn’t limited to a single voltage or single configuration; the dual-voltage design is what enables flexible operation.