Three phase balanced circuit analysis

Thread Starter


Joined Apr 2, 2018
I'm studying three phase circuits and I am struggling a little. I am coming across different examples and would like some clarity.

Firstly I understand that in a balanced three phase star circuit the neutral current is zero and can be calculated by

But when I am looking at examples in j notation it appears that the neutral current is the sum of the three phases converted into rectangular form.

What am I missing? Does anybody have any examples they can send me?

Thanks in advance.