# Three-phase system question

I'm solving some problems on three-phase systems. I'm doing pretty OK, but there is one problem that I'm not sure about the answer so I have some questions.

We have a three-phase circuit connected in a star connection, which is balanced (since the three impedances have the same value). The neutral wire has an impedance too, that has a value of 5 Ω and 30º. (This value it's different to the other impedances).

They're asking me the value of electric current on the neutral wire. I know it's zero when the system is balanced. However, I'm not sure if the fact of having an impedance on the neutral wire can affect on this.

I know it's a very basic question, but I'm a bit messed and I couldn't find this anywhere, thanks so much for the answers on beforehand!

As long as the system is balanced, there's no voltage from one end of the neutral to the other, so no current will flow, regardless of its impedance.

• Thanks so much!!! I've got the concept much more clear now. Commented Nov 23, 2014 at 17:14