**Electrical Power System**: Relating to three-phase electrical power distribution.

**Motor Operation**: Describing motors designed for three-phase use.

**Signal Processing**: Pertaining to systems using three phase signals.

**Phase Control Systems**: Referring to control mechanisms in multi-phase setups.

**Load Balancing**: Indicating balanced load across three phases in circuits.

**Three-phase power supply**: Electrical system using three alternating currents.

**Three-phase motor**: Electric motor powered by three phases.

**Three-phase transformer**: Device transforming voltage in a three-phase system.

**Three-phase circuit**: Circuit designed for delivering three electrical phases.

**Three-phase generator**: Machine generating electricity with three distinct phases.