One of the top Google results: https://www.engineeringradio.us/blog/2012/02/the-open-delta-three-phase-service/
Really really, there's only two pigs on the pole. And yet, delta power, though at a lower rating than transformer nameplate (vs. if you had three). Thanks, Jonathan ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Tuesday, January 4th, 2022 at 14:56, Grant Taylor via cctalk <cctalk@classiccmp.org> wrote: > On 1/4/22 8:52 AM, Jonathan Chapman via cctalk wrote: > > > Indeed. This is not corner-grounded delta. Once you figure out open > > > > delta, look at dog-leg. > > I did some brief reading on open delta and now think that it requires > > three lines, independent of ground. So I fail to see how open delta > > would be any benefit save for a simpler transformer (fewer coils) or > > fewer transformers. It seems as if you would have the same line and > > insulator cost as more common (closed) delta. > > > ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > Grant. . . . > > unix || die