In a delta-wye configuration, the secondary wye leads the primary delta by how many degrees?

In a delta-wye configuration, the secondary wye connection leads the primary delta connection by 30 degrees. This phase shift arises due to the relationship between the voltage and current in the different configurations. Specifically, when converting a three-phase system from delta to wye, the line-to-line voltage in the delta is higher than the line-to-neutral voltage in the wye. As a result, the timing or phase angle of the wye connection will be advanced relative to the delta connection, resulting in that 30-degree lead. This concept is important in power systems and electrical engineering, as it helps in understanding how different configurations affect the performance and interaction of electrical machines and power systems.