Balanced Y-connected load is shown in Fig. 7.2. The neutral point (n) of the windings are grounded through an impedance Zn . The load in each phase is denoted by ZY. Let us consider phase a of the load. The voltage between line and ground is denoted by Va, the line-to-neutral voltage is denoted by Van and voltage between the neutral and ground is denoted by Vn. The neutral current is then