Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· 3-phase circuits are common in large scale power generators and delivery systems.
· These systems carry 3 phases of voltage, each 120 degrees out of phase, on three separate conductors. If these three wires are connected through a balanced load the sum of currents is zero. Most systems provide a fourth wire as a neutral.
· As a result loads can be connected in a delta configuration with no neutral.
