On Fri, 3 Feb 2017 22:44:16 -0800 (PST), Phil Allison
wrote:

Look165 wrote:


Just unlink the two winding by cutting at the middle point which is the
common one (it makes 4 separate windins).


** OK - so 240 & 240 plus 120 & 120.


Then put them in parallel at primary and secondary (and in phase !).



** Nah, that makes a 240 to 120 step down.

But only if the parallel pairs of windings have the *exact* same number of turns.

If not, you get major overheating.



.... Phil

Windings with the same label voltage will have the same turns. This is
checked automatically/electronically during fab. Unbalanced turn coils
are discarded/scrapped.

RL