The ‘Wye’ Or ‘Star’ Service Transformer
(My March 3, 2003 column dealt with the secondary windings of a Delta service transformer, showing that power-leg or wild-leg voltage is 208 V with respect to ground. It also mentioned that this 208 V should not be confused with the 208 V coming from the secondary Wye service transformer.)
This article will deal with the secondary windings of the Wye service transformer.