Howdy y'all- I don't think that's an autoxfmr.
edit: DUH! I looked again. Type:Auto!
But still
My POCO doesn't allow autoxfmrs for connecting PV inverters, or they don't like it a lot.
The pic of the specs plate Joe posted listed primary and secondary.
There's no primary/secondary with an auto xfmr.
This autox goes from 480Y to 208Y:
http://www.temcoindustrialpower.com/products/Transformers_-_General/HT4438.html
This is the wiring diagram. I don't get it at *all*, but I do get how there's no pri/sec.
http://attachments.temcoindustrialpower.com/Wiring_diagram/transformer_wiring_HT_diagram14.pdf
This isolation xfmr looks more like the pic Joe posted.
http://www.temcoindustrialpower.com/products/Transformers_-_General/HT0585.html
It even has the Hs and Xs on Pri and Sec.
Wiring for previous link:
http://attachments.temcoindustrialpower.com/Wiring_diagram/transformer_wiring_HT_diagram35.pdf
So I think you're good, Joe! (I think?) You have the X0 on the inverter side (which the inverter has to have) and the H1 H2 and H3 are 208 L-L, so will be 120V L-N.
Anyone else? The inverter(s) neutral gets bonded/ground on the 480Y/sec side of Joe's xfmr, and the 208V from the "primary" (output) side of the xfmr gets bonded/grounded at the...600A disco?
I'm a little confused by @ parallel runs- should it be 3?
200 amp load center
to
fused 200 amp disconnect
to
XFMR, 2 parallel output runs
to
fused 600 amp disco, 2 parallel runs
to
line side tap at 1600 amp 208Y switchgear