Fort McCoy’s Directorate of Public Works (DPW) and Xcel Energy continued to work together to finish the process of changing the electrical grid on post from a Delta Electrical System to a Wye ...

The electrical configuration of the delta-wye transformer makes it the most popular transformer connection in the world. When it comes to making proper transformer connections, more industry ...

The work is part of an ongoing electrical grid upgrade at the installation where the post will go from a from a Delta Electrical System to a Wye Electrical System.

According to this site Delta get you less voltage/more current and wye the reverse. Check the paragraph just above the picture showing Delta and Star (Wye) wiring diagram.