Is a Delta-Delta isolation transformer considered an ungrounded system?

Merry Christmas

tortuga

Code Historian
Location
Oregon
Occupation
Electrical Design
If you can't use 208 and 240Y/139 hard to get you might look into using a 208Y/120 with the 105% tap set you'd get ~ 220Y/127 which (if I am not mistaken) is at the bottom of the ANSI spec for a 230V motor nameplate.
 
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