What is the voltage measured between a ungrounded star point of a 3ph motor and ground should it be zero?

The voltage measured between an ungrounded star point of a three-phase motor and ground should ideally be zero. This is because, in a balanced system with no faults, the star point (neutral) does not have a potential difference with respect to ground. However, if there's an imbalance or a fault condition, the voltage could differ from zero, indicating potential issues in the system.