Need to know If I can change machine frome 220 3 phase to 480 3 phase Serial # 2664

One needs to know what the voltage and phase(1 or 3) the unit is and what the power supply is.

You need a transformer to do that. I assume that you are in the USA and you have a 480V three phase service. With 480V three phase there is 277 volts between any two of the phases. There are transformers to drop 277V down to 220V.
A better solution is to ask your power company for 220V service. The power company owns the transformer and you only have to provide the in house wiring. .If you have a commercial establishment you have to meet all local codes and be inspected. If you don't the liability is very great.
Use a licensed electrician.

I ahve a linclon ideal arc 250 welder which is 480V 3 phase I would like to change it over to 220V single, what are the procedures.

GVE_10
That is a tough one, as 1400E has been out of production for 30 years. Parts have been discontinued for about 20 years. When you say you need to change voltage, that machine was made as 208 0r 240. 240 machine was always fine on 220 volts. 208 machine could burn out heating element over some time, but since you cannot buy other elements anyway, I would just go ahead and use the machine. If your real question is how to convert from 1-phase to 3-phase or vice versa, that is different story, and I can help you with that.
Jon
[email protected]

The way Miller made that one, if you do not have the unit that is made for 200/230/460, you cannot make that change.

The manual section 5 page 12 has the exact procedure, but in a nutshell, (assuming lockout procedures are done) remove the red power lead and tape off/insulate it. L1 and L2- the black and white power input leads are attached to the single phase power, AFTER the ground wire is connected to the ground of the disconnect. The fuse should be a 90 amp regular or a 70 amp time delay. The relinking board should be checked to see if it is on 460 or 200/230. The manual is not entirely clear on this in section 5 page 10, but the relinking should be on the 200/230 connection. It will be located in the lower portion on the right side as you face the front of the machine. On the right side of machine with lower panel removed, if will be just left of center up near the top of that lower opening. . it is held in place with 4 screws- and once moved to the correct position, all 4 screws must be used to secure the board in place.

The manual is availabe at the miller welding website as well.
http://www.millerwelds.com/service/ownersmanuals.php?model

What you bought is an industrial voltage heater and I purchased one last year as well. According to the manual and the model number you give it translates to 30 kilowatts 60 is 600 volts AC the -3 is three phase. This is only for three phase 600 volt operation, and no you can not wire this heater single phase it will not work period. Even if you do wire this thing at 220 volts single phase double pole there would not be enough voltage to run the fan let alone heat the elements. Can you return the heater? By the way Fastenal is the distributor for these that is where mine was purchased. All of my information is out of the manual that I got with my purchase of a Fostoria FES3048-3.

HI:) If that is a 3 phase 440 volt and you want it to use 220 volt 1 Phase you will have to get a phase inverter to change it from a 3 phase to a single phase.

i have a old miller thunderbolt CC*AC/DC welder its wire single phase 480 can it be switched to 220 single phase

Yes you can. Drop me a line at [email protected] to discuss further!

It can be done with a transformer, 480/ 240 single phase transformer to get the lower voltage. Then the oven will require some wiring changes to get all the elements and controls connected to two hot wires instead of three. The transformed will be sized to the wattage rating of the oven. This is a only basic description of what needs to take place.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c