Example 4: Motor. Suppose you have an electric motor with a KVA rating of 50 and a voltage rating of 480 volts. To convert KVA to amperage, you can use the formula: Amps = KVA / (Volts x Power Factor) Amps = 50 / (480 x 0.85) Amps = 64.81. So the motor can draw a maximum of 64.81 amps at 480 volts with a power factor of 0.85. Example 5: Welder The problem you will run into here is that your line voltage is lower. This means that you cannot get full 460V output power to this motor when in China. But you can get full torque at 50 Hz output, which will take place at 380V output. You can accept that as it is, or you can allow the VFD to give the motor 60Hz. RE: Operating 380V equipment on 400V supply The 400 V were more or less a rule in the “380” V world for many years. It is only lately (relatively) that newer equipment are rated 400 V. There are still lots and lots of 380 V equipment that now run on 400 V. Incandescent lamps are usually the ones that die first. Hard to tell, but you should look the nameplate of the motor it can run on 4 nominal voltages. If you said 220/440 than it shuld have 127V (start 2), 220V (run2), 254V(start), 440V (run). With a VFD the motor shall be connected as LOWER/RUN 2 delta. EDIT: Some mistakes: If you said 220/440 than it shuld have 380V (start 2), 220V (run2), 760V 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. DuSmr1c. Get two wires from the converter and connect them to the power supply. The inputs should run to the outputs and the power supply’s grounding wire to the converter’s grounding screw. Run a wire between the phase converter and the motor’s grounding screw. If you’ve never heard of a phase converter, Lingfran says they can convert three The problem you will run into here is that your line voltage is lower. This means that you cannot get full 460V output power to this motor when in China. But you can get full torque at 50 Hz output, which will take place at 380V output. You can accept that as it is, or you can allow the VFD to give the motor 60Hz. Power & Amp - The amount of voltage running through the lines is related to the power and amp. The power and amps depends on the type of circuit phase, you are operating on. Cable Run - Cable run is the length of the cable, you are going to use while wiring your house or workplace. Make sure you check the resistance and thickness of the wire. 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 Since this transformer has a ratio of 1:2 the load current on the 480V side just has to be doubled. 85 x 2 = 170A on the primary. 40.8 KVA transformer. To prove this just find the KVA of both

can you run a 380v motor on 480v