Corner Grounded Delta 480 volt
Corner Grounded Delta 480 volt
(OP)
1) Can a standard open transition type 3 phase transfer switch be used in a Corner Grounded Delta system to feed the same loads?
2) Can a generator of 3 phase 480 volt wye be used for the back up source for the same system?
2) Can a generator of 3 phase 480 volt wye be used for the back up source for the same system?





RE: Corner Grounded Delta 480 volt
2) It depends.
Yes and/or No are just as valid answers. There would need to be a lot more information about the system to know for sure one way or another. Where, and what governing codes, would also make a difference.
RE: Corner Grounded Delta 480 volt
The VFD's and motors we had installed didn't seem to mind.
I recall the EE missed it, I didn't realize it (or even knew such an animal ever existed) until I was looking at the startup reports and saw the odd voltages between, I guess it was L-G...don't recall exactly. Fortunately for us, nothing we had installed was looking for 1-phase 277. There may have been some drive parameters that had to be set, but there again I don't recall specifically. I do recall there were several that weren't right at startup.
Mike