Thanks to everyone for your help. We will be using the motors at 380 volts auto-tranformed down from 480 volts. This is a solid 480 volt, three phase system. The motors are listed for operation at 60 cycles 220/380 volts.
busbar, thanks for the suggestion which I checked out, but the nameplate on the motors is already 60 Hz, and the nameplate motor rpm is in the normal 1700 to 1750 range for 240/480 motors
An Asian company has shipped several 220/380 V 3 phase motors to use at a location where a new service will be installed. The only options are 240 or 480 volt. The largest motor is 75 hp. What is my best option to make things work short of sending all of the motors back?
