Electric currents, Alternating Three-phase

Enlarge text Shrink text
  • Topic
| מספר מערכת 987007412397205171
Information for Authority record
Name (Hebrew)
זרם חשמל חילופי תלת פאזי
Name (Latin)
Electric currents, Alternating Three-phase
Other forms of name
Three-phase alternating electric currents
MARC
MARC
Other Identifiers
Wikidata: Q471846
Library of congress: sh2015001252
Sources of Information
  • Work cat: Fleckenstein, J.E. Three-phase electrical power, 2016.
  • Inspec, May 14, 2015(uncontrolled terms such as Three-phase power systems)
  • Applied science & technology full text, viewed May 14, 2015(many titles and abstracts about three-phase power systems and devices)
  • Wikipedia, viewed May 14, 2015(Three-phase electric power; similar article under heading Three-phase; a common method of alternating-current power generation, transmission, and distribution; it is a type of polyphase system)
1 / 10
Wikipedia description:

Three-phase electric power (abbreviated 3ϕ) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. It is a type of polyphase system employing three wires (or four including an optional neutral return wire) and is the most common method used by electrical grids worldwide to transfer power. Three-phase electrical power was developed in the 1880s by several people. In three-phase power, the voltage on each wire is 120 degrees phase shifted relative to each of the other wires. Because it is an AC system, it allows the voltages to be easily stepped up using transformers to high voltage for transmission and back down for distribution, giving high efficiency. A three-wire three-phase circuit is usually more economical than an equivalent two-wire single-phase circuit at the same line-to-ground voltage because it uses less conductor material to transmit a given amount of electrical power. Three-phase power is mainly used directly to power large induction motors, other electric motors and other heavy loads. Small loads often use only a two-wire single-phase circuit, which may be derived from a three-phase system.

Read more on Wikipedia >