Definitions for three-phase
This page provides all possible meanings and translations of the word three-phase
Random House Webster's College Dictionary
of or pertaining 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°.
Category: Electricity and Magnetism
Origin of three-phase:
In electrical engineering, three-phase electric power systems have at least three conductors carrying alternating current voltages that are offset in time by one-third of the period. A three-phase system may be arranged in delta or star. A wye system allows the use of two different voltages from all three phases, such as a 230/400V system which provides 230V between the neutral and any one of the phases, and 400V across any two phases. A delta system arrangement only provides one voltage magnitude, however it has a greater redundancy as it may continue to operate normally with one of the three supply windings offline, albeit at 57.7% of total capacity. Harmonic currents in the neutral may become very large if non-linear loads are connected.
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