This XFMR can do the job as 6 kVA should be more than enough for a 5 hp motor....
The taps provide you with an opportunity to adjust down to a reverse transform from 208 up to 460 to 480...
I'm not willing to punch the math...
But the basic equation -- per the diagram -- seems to be a delta- delta transform; or perhaps an ungrounded wye-wye transform...
Again...
Based upon their label notation...
Direct inspection would determine which is which.
Note the lack of ANY PHASE ANGLE SHIFT...
So I'd treat the reverse transform as if the primary voltage was HIGH and the desired voltage was 240 3-phase.
By which I mean that the reverse transform comes from only 208 3-phase and I want a high result.
Test unloaded, check the output voltage, you should be good to go.
Last edited by Tesla; 04/17/10 07:34 AM.
