Don Murray writes:

| Take a look at the diagram that is open wye-open delta. Don't concern
| yourself with the primary or open wye. But the secondary open delta is
| just what you have.

Not necessarily. He could have the Scott 4 wire.

Does any utility *ever* provide Scott two-phase power, except for a few
rare cases of feeding very old stuff?

Phil,

The only Scott connections I know about are to get 2 phase power from 3
phase. If you look at the bottom of this page

http://murrayranch.com/Electricity.htm

you can see diagrams of three, four and five wire Scott connections.

If you know of any Scott connections which provide 3 phase power, I
would like to learn about them.

You could configure two transformers with both primaries and secondaries
in a Scott configuration and wind up with what amounts to 3 to 2 to 3
phase transformation. I have never heard of this being done with pole
pigs even though you only need two of them, but someone here mentioned
pad transformers are sometimes built like this internally.
--
-Mike