I think over sizing your feeder conductors is going to be more economical than using transformers. 500 kcmil CU will probably cost less that 2 transformers and the smaller wire between them. If you do decided to use transformers I would stick with either 480 or 600. Medium voltage cable and transformers are not cheap and you will still have losses from the transformers.

Is this feeder supplying the dwelling or a separate structure from the dwelling? What large loads are included in the 33 KW?

Curt


Curt Swartz