Small drives controlling 3Ø motors can be supplied with ___ power.

Small drives controlling three-phase (3Ø) motors can indeed be supplied with either single-phase (1Ø) or three-phase (3Ø) power. This versatility is significant, as many small applications and installations may only have single-phase power available, especially in residential settings or smaller commercial environments.

In applications like these, a small drive capable of accepting a single-phase input can adapt to the existing electrical infrastructure while still effectively controlling a three-phase motor. When supplied with single-phase power, the drive typically uses internal circuitry to create three-phase output for the motor operation.

Conversely, when the supply is three-phase, the drive operates efficiently by directly utilizing the available phases, ensuring better performance, especially in terms of torque and operational efficiency. This adaptability makes drives extremely useful in various applications across different sectors. Thus, the correct answer acknowledges this flexibility in power supply options for small drives controlling three-phase motors.