yes, 480v. single-phase is not real common in most industrialized areas, but one place it is, is in the oil fileds and mining industries. also, the monstrous commercial farms, such as the imperial valley area of california. these larger horsepower motors awill be offered as an alternative to the diesel power units used to drive big irrigation and dewatering pumps. i havent seen much cost analysis data yet, but what i have seen seems to be more cost-effective, using the new technology, compared to running three-phase power or dealing with the inherent problems of diesel power. once the initial installation of the transformer, controls, and motor set are completed, you can pretty well just turn it on and forget about it; i.e. relatively low maintenance compared to the diesel.
gramps
