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Three-phase electric power

Three-phase electric power (abbreviated 3ϕ) is the most widely used form of alternating current (AC) for electricity generation, transmission, and distribution. It is a type of polyphase system that uses three wires (or four, if a neutral return is included; not counting any protective conductor) and is the standard method by which electrical grids…

History, Measurement & Standards

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Overview

Terminology

History

Principle

Advantages and disadvantages

Generation and distribution

Transformer connections

Three-wire and four-wire circuits

Balanced circuits

Single-phase loads

Three-phase loads

Phase converters

Alternatives to three-phase

Color codes

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Three-phase electric power

Nodes103
Edges102
Triples19
Avg. degree1.98
Density0.019417
Components1

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Three-phase electric power

Top relations

see also · 3
Three-phase electric power → AC, Electrotechnical ExhibitionMathematics, Industrial

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Important terminology

three-phase phase power voltage neutral system single-phase three phases used load electric loads current delta motor two may transformer one

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
industrial machineryinstance ofmaking it especially efficient for transmitting electricity over long distances and for powering heavy loads0.80text
stovesinstance ofCircuits designed for higher powered devices0.80text
dryersinstance ofCircuits designed for higher powered devices0.80text
or outlets for electric vehicles carry 240 V.In Europeinstance ofCircuits designed for higher powered devices0.80text
three-phase power is normally delivered to the panelboardinstance ofCircuits designed for higher powered devices0.80text
further to higher powered devicesinstance ofCircuits designed for higher powered devices0.80text
the UK may supply one phaseinstance ofsome countries0.80text
neutral at a high currentinstance ofsome countries0.80text
switch-mode power suppliesinstance ofGas-discharge lamps and devices that utilize rectifier-capacitor front-end0.80text
computersinstance ofGas-discharge lamps and devices that utilize rectifier-capacitor front-end0.80text
office equipmentinstance ofGas-discharge lamps and devices that utilize rectifier-capacitor front-end0.80text
such produce third-order harmonics that are in-phase on all the supply phasesinstance ofGas-discharge lamps and devices that utilize rectifier-capacitor front-end0.80text

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