Image:3-phase flow.gif

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Animation of symmetric three-phase electric power flow.

Current flows from a three-phase generator on the left, represented as three wye-connected single-phase sources, via a transmission line into a symmetric wye-connected load on the right. The phases have been arbitrarily coloured red, green, and blue. The angular separation between the phases is 120°, or 2π/3 radians. The supply frequency you observe in this animation will depend on your computer performance, but should be around 0.3 Hz.

At any point along the transmission line, the net flow is zero at all times during the cycle. The neutral circuit, which would connect between the centre wye points of generator and load, has been omitted. In a balanced system, it would carry no current.

The phase sequence is red→green→blue, indicated by the order in which current flows into the three loads in turn.

I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. Subject to disclaimers.

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	Date/Time	Dimensions	User	Comment
current	13:10, 2 January 2006	412×263 (294 KB)	BillC (Talk \| contribs)	(Lightened colours slightly)
	23:59, 1 January 2006	412×263 (295 KB)	BillC (Talk \| contribs)	(Animation of symmetric three-phase power flow. The phase sequence is shown by the arbitrary colouring of red->green->blue. The generator is represented as three wye-connected single-phase sources separated by 120° and supplies a symmetric wye-co)
	18:15, 1 January 2006	412×263 (295 KB)	BillC (Talk \| contribs)	(Animation of symmetric three-phase power flow. The phase sequence is shown by the arbitary colouring of red->green->blue. The generator is represented as three single-phase sources separated by 120° and supplies a symmetric load on the left. At)