# three-phase

[three-feyz] /ˈθriˌfeɪz/
1.
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°.
2.
having three phases.
Origin of three-phase
1890-1895
1890-95
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for three-phase
Historical Examples
• The rail mill is operated by three-phase induction motors of from 2000 to 6000 horse-power capacity.

• They are three-phase machines, delivering twenty-five cycle alternating currents at an effective potential of 11,000 volts.

Anonymous
• The result produced by three such coils is called a three-phase current.

Willis Eugene Tower
• The round dial instrument shown at the bottom of each row of instruments is a three-phase recording wattmeter.

Anonymous
• These tests were made with three-phase current of sixty cycles per second.

• It will be seen, therefore, that by doubling the three-phase system the pulsations are already very greatly reduced.

• Each of the towers on the line to Toronto carries two three-phase circuits, and the least distance between cables is six feet.

• If the current in coil A (fig. 41) is flowing away from the centre, and has its maximum value, the three-phase alternators.

• The theory of progressive distress fits convincingly into the scheme of the Hegelian three-phase dialectic.

Thorstein Veblen
• Two-phase of three-phase currents would give two or three positive impulses during this time.

Harold P. Manly
British Dictionary definitions for three-phase

## three-phase

1.
(of an electrical system, circuit, or device) having, generating, or using three alternating voltages of the same frequency, displaced in phase by 120°
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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### Difficulty index for three-phase

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### Word Value for three

8
7
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