I've always understood that in a 3-phase 3-wire delta system current was balanced by all three legs in the system. For instance i current flowing down phase A would return to the source on both phases B and C. So any current that appears on one leg would return on the other two and thus be balanced. This is the principal of operation of a zero sequence CT.
What about a 3-wire wye system? Does a current flowing down phase A return via phases B and C, or does it return via the nuetral point? I've been confused about this wye configuration. I thought there was a possibilty of the current returing via the nuetral point and if they were all balanced then there would be no current flow and if unbalbanced there would be flow.
So my question is for a three phase load on a 3-wire wye system do the currents return to the source via the other two phases?
What about a 3-wire wye system? Does a current flowing down phase A return via phases B and C, or does it return via the nuetral point? I've been confused about this wye configuration. I thought there was a possibilty of the current returing via the nuetral point and if they were all balanced then there would be no current flow and if unbalbanced there would be flow.
So my question is for a three phase load on a 3-wire wye system do the currents return to the source via the other two phases?