A three-phase asynchronous motor with star-connected windings is connected to a network with a voltage of U = 380 V.

A three-phase asynchronous motor with star-connected windings is connected to a network with a voltage of U = 380 V. What will be the voltage between the phase terminal (A, B or C) and neutrality? (zero pass)

When connecting the windings with a star, Ul = √3Uph, where Ul is the line voltage, the mains voltage (between AB, BC, AC), Uph is the line voltage, i.e. voltage between any of the phases and the neutral wire (AO = BO = CO). From the problem: Ul = 380V, so Uf = Ul / √3 = Ul / 1.73.
Uph = 380 / 1.73 = 220V.