Current flows from a three-phase generator on the left, represented as three Y-connected single-phase sources, via a transmission line into a symmetric Y-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 Y-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.
2006-01-01 23:59 BillC 412×263× (301694 bytes) 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
2006-01-01 18:15 BillC 412×263× (301729 bytes) 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 single-phase sources separated by 120° and supplies a symmetric load on the left. At
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