Or run it the way it is! A 575v rated motor will run in 480 volts, except you will have to down grade the overall motor output torque by .64. The available torque is porportional to the square of the voltage. For hobby use you may be just fine as long as your not going to be doing any real hogging or hard cutting. 600Y/347v 3-phase 4-wire or 600v delta. Naturally, all the line voltages above are the product of the phase voltages x root 3 (1.732). This is a mathematical given, as the phase voltages are 120deg displaced from each other and are non-linear loads. For some reason, American and overseas manufacturers refer to the higher voltage as "575" volts. If the motor is, as I suspect actually would for 380V 50 Hz, then you can run it on 460V 60Hz. In fact I would expect that a motor marked 380volt 50Hz would be suitable for operation at 415 volt 50Hz which is very common. At that voltage the rated current will fall, and if this is the case, you could operate it at 480 volt 60 Hz with no problems. With a very simple logic for a motor load - more is voltage more is the current. More is frequency less is the current. Perhaps you don't need to change any thing if the machine is made of motors and transformers, (no heaters and bulbs etc), and this machine would work fine on 480V 60Hz,in case it has bulbs and heaters etc you can separate out them and heaters run with separate line coming Steps for Estimating Starting and Running Wattage. Select the items you wish to power at the same time, and add together for the total running watts. Selected the item with the highest number of starting watts. Add the two numbers together for total watts needed. If you can't determine the running watts of an item, use the formula of watts 3-phase power systems: Y (Wye) and Delta. With a 3-phase supply you have two ways of connecting a traditional 2-wire load, such as a light bulb or a server. In a Y system you can connect it between any phase (X, Y or Z) and neutral (N). In both Y and Delta systems you can also connect it between any two phases (X-Y, Y-Z or Z-X). 480-volt vs. 208-volt Service Question. It is not necessary that a commercial building have a 480-volt service. The decision for using either a 208-volt or 480-volt service should be based on the size and the nature of the loads. The buildings in question are not of a size or type which would lead us to think that a 480-volt service is necessary. For Example: Given a 480V to 208V Delta > Wye, with an input voltage of 460V and a tap set for 480V would yield: (460/480) X 208 = 199.33V. In order to yield 208V this tap setting would be insufficient. You would have to use a tap setting that was lower, such as 456V. BG or BGE Brake Rectifier. Motor wired for high voltage. Brake voltage matches high motor voltage. Example: 220/380V Motor Motor wired 380V Brake voltage 380V. The BG Brake Rectifier - Standard for frame sizes up to 100, not available on frame sizes above 100. The brake rectifier BG is a half-wave rectifier with overvoltage protection. I bought a 3ph 480v I-R compressor that uses a PAIR of 1ph isolation transformers as a power conditioner. So the PC is actually setup 480v in/ 480v out. I only have 240v, 3ph power. The isolation transformers can be connected as 240v primary. With what I have, is it possible to setup the PC oTLUfCl.