how does the current divide in a three phase system?

Question

So let’s say that I have a three phase system has a current absorption on 30A. Are these 30A divided 10 per phase or are these 30A per phase, which brings the total to theoretically 90A?

In: 1

Answer 1

If you are simply attaching an ammeter to a single phase, you will see the undivided amperage of the load. But keep in mind that although your meter is showing a seemingly constant current draw, the current distribution in the three phases is continuously changing. In any one or two conductors, the leaving current is same to the entering current in that conductor (or conductors). In other words, each conductor provides a return path to the currents of the other conductors. This way, current division is continuously changing in three lines.