zapped277 — This is a good application for a “two-can” open-delta-secondary 240/120V 3ø 4w transformer bank. The transformer that feeds both loads could be 25-75kVA (1ø) with an additional 10kVA (1ø) unit for the 3ø load.
The arrangement is very common in some areas for small “ranchettes” where there is a 1ø meter (400-amp household service) on a residential or domestic power rate and a 3ø meter on an agricultural or water-pumping rate, serving up to a 15hp pump.
