In the case of Europe, most Star (Wye) and Delta connections will have a phase difference of 120°. In North America, the phase shift can be 180° when split phase connection type is used or in the case of Delta connection with center tap on one leg. | In the case of Europe, most Star (Wye) and Delta connections will have a phase difference of 120°. In North America, the phase shift can be 180° when split phase connection type is used or in the case of Delta connection with center tap on one leg. |