What is the difference between 3-phase 3-wire and 3-phase 4-wire systems and how to wire?

Posted by

There are two basic three-phase configurations: wye (Y) and delta (Δ). The delta connection is to connect the power sources or loads of each phase in turn to form a triangular ring. Star connection is to connect one end of the power sources or loads of each phase at one point to form a neutral point. If a neutral wire is drawn from this neutral point, the whole structure becomes a three-phase four-wire system.

Leave a Message