- of or relating to a circuit, system, or device that is energized by three electromotive forces that differ in phase by one third of a cycle or 120°.
- having three phases.
Origin of three-phase
Examples from the Web for three-phase
Historical Examples of three-phase
The result produced by three such coils is called a three-phase current.Physics
Willis Eugene Tower
They are three-phase machines, delivering twenty-five cycle alternating currents at an effective potential of 11,000 volts.
The round dial instrument shown at the bottom of each row of instruments is a three-phase recording wattmeter.
It will be seen, therefore, that by doubling the three-phase system the pulsations are already very greatly reduced.
The rail mill is operated by three-phase induction motors of from 2000 to 6000 horse-power capacity.
- (of an electrical system, circuit, or device) having, generating, or using three alternating voltages of the same frequency, displaced in phase by 120°