I'd be very surprised if there is such a thing as a US Power Supply. Most power supplies these days are PFC front end with switching regulators with IEC appliance coupler inputs.... Nerdspeak for auto-sensing universal input.
The only way that there is a US power supply is if they are using AC synchronous motors for pulling tension. Which would really worry me because the controls are somewhat sloppy when compared to DC motors.
I suspect the "US Power Supply" is nothing more than a power cord.