Rojo-sy;

The 4 Wire Delta has a center Pot, which is sized according to the expected 120 VAC 1Ø 2 Wire (or combined 120/240 VAC 1Ø 3 Wire loads).

Larger center Transformers where more 1Ø 120 VAC needed, smaller where less is needed.

Scott35

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!