ESAB LAG 400 Input voltage

My best suggestion for you would be to wait until you get a good collection of replies before you modify it.

Another way to go would be to run 3, 12 volt batteries in series along with a 6 volt one. that would give you the desired 42 volts DC. If you are not welding for longer than a half hour, you should be able to weld from the batteries, them just recharge for next time. Good luck.

Hi Bob

How the **** did you reply so quickly. The ink hadn't even dried!

No, you misunderstood my problem! The main welding transformer (the big lump) I used to run on 3ph 415V. I now only have 1ph 240V. The 42V is only to run the wire feed. So, can I run a 3ph 415V welder on single phase juice? I have done it on a Migatronic Tig welder but it had tapping's inside to accommodate for this!

I stole the Kris-Del prototype time machine. I keep it hidden in the past in Roswell NM.

I saw your post tomorrow. I'll look in on you next year, and let you know how you worked it out.

Uhmmmm! Ok, back to the case in point. DOES THIS PICY HELP ANY ELECTRICAL EXPERTS?

Connect it up as per the drawing on the far left(220V, 50hz). Place the links as shown in K30. Just don't forget that the current draw is approx 3 times that of 3 phase and you will need a good sized feeder cable. The best idea would be to plug it in on it's own supply, preferably not a common 10 amp GPO.

I hope this helps

Hi Doggoneit.

Yep, I've already done as suggested BUT my problem is how do I connect the welder to the incomming single phase supply?

I have a live, neutral and an earth but the welder requires 3 lives and an earth!

Where could I connect the neutral AND what do I do with the two unused lives. Do I connect all three lives in the welder together and treat them as one?

Any clues?

I have been thinking about buying an inverter to create 3ph from 1ph but..... loads of bickies!

HELLO DOGGONIT...I HAVE AN OLD AGA WELDER THAT IS SINGLE PHASE OR THREE PHASE. HAVING CONNECTED THE LINKS INSIDE FOR A SINGLE PHASE SUPPLY,I NOW LOOK TO THE CONNECTION OF THE SINGLE PHASE LINES. IT GOES AS FOLLOWS:-

INCOMING RED/LIVE ON TO ONE RED PHASE.

INCOMING BLUE/NEUTRAL ON TO BLUE PHASE

THEN ADD A " LOOP " FROM YOUR RED/LIVE TO THE REMAINING PHASE.

THIS WORKS FINE WITH MY MACHINE. IT MAY WELL WORK WITH YOURS.

GOOD LUCK. TERRY.

I run my 3 phase machine shop on a 1 to 3 phase converter that my electrician wired up for me using an old 3-phase electric motor. If you can get your hands on such a motor, it should not be a major task.

This is not the first time I have herd about using a motor to accomplish this, but I cant quite grasp how it is done. Please explain if you can the size of motor required as related to the load, connections, etc.

About all I can tell you is that my electrician told me to locate a 3 phase motor rated at twice the horsepower of the machinery I planned on driving. He hooked up some capacitors and a relay, and voila, everything works, forward and reverse.

Call Toll Free Anytime:
1-800-ESAB-123
(1-800-372-2123)

I suggest that you contact Esab directly on their toll free number. They should have someone that can help you.

Hi,

Try going to the following site, this is a good option with out changing the welder which, I don't think can be done, as you are describing. Good luck!

http://www.ronkelectrical.com/add_a_phase.html

I live very far out in the country and to get 3 phase current ran into my shop was in t he $40,000.00 range. I instead built my own 3 phase rotary phase converter that uses start capacitors to start the motor a potential relay and two contact relays once the motor is started and the 3rd leg of the motor then starts to generate it switches over to the two run capacitors to equalize the voltage a bit. I bought a kit with all the components from a guy on Ebay for 80.00, had a 7-1/2 HP 3 phase motor and a electrical box laying around to put it all in. I run it allot and it produces very nice 3 phase current to run an ironworker punch and Bridgeport milling machine in my shop.(total 4-1/2 Hp motors) If you need more current then you get a bigger motor and add capacitors to both the run and start sides. You may need to research using this type of converter for a induction type of current but I think it will work well. I am planning to try it on a welding machine in the near future to see if it works OK and well let you know if I do. I also know of a cabinet shop and a machine shop in my area that uses these same rotary phase converters to produce their 3 phase power. In my area used 3 phase equipment is usually allot cheaper to buy and it is nearly always better quality and higher HP rated industrial equipment. One thing I would suggest is to try and find a 1725 rpm motor to build the converter out of instead of a higher RPM motor.

Hi Pipewelder

I'm glad you said what you said cos' I have just had confirmation out of ESAB that my welder can't be converted to single phase so, I am already on the trail of a rotory converter.

Thanks for your input!

I just got back from next year. It seams that you used some kind of a device to go between the supplied power coming to the house, and the welder. It looks like a motor of some kind. There was fog in the area, so I could not see so well. Lots of wires coming out of it though. By the way, the vegetation looked like it needed some watering. I hope that helps.

hi do you have a manule for it im after one or some thing on whats the settings are and the abc for earth return

Hi

Yes I have. I can copy to your email address (you will need to send that to my mail box).

It might be a big file.

Do you want the manual for the main transformer or the wire feed or both?

Regards!