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. Might still be worthwhile for someone else.
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If it's on ebay and being advertised as for spares or repairs you can bet your bottom dollar it is goosed and someone's probably already had a go at fixing it/spent money on it. It's an old machine so spares probably not easy to find
It's a £100+ door stop.
There's better stuff about for not huge amounts more.
It's a £100+ door stop.
There's better stuff about for not huge amounts more.
Someone has had it apart and by the looks of things put it back together with bits missing- i'd have thought if it was just the polarity switch missing there'd be a spindle poking out of the case for it to attach to? The hole above the main amperage dial possibly just had a blanking grommet in it, i've used several of these and never seen one that was specced with a working digital meter. Working examples have a lovely smooth arc but they ain't half power hungry
normspanners
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Some people call 415v two phase,and as such to get 415v you have to be wired into a 3phase plug but using only two of the pins, but it is in reality only single phase because it is generated by using two of the three phase system, so only uses one wave,as such.
This is how in the USA they have 120 and 230v in their houses by using one or two of the generated phases. the large stuff uses the 220v.
You can run off single phase 415v simply by using a 240- 415 oil cooled welder as an auto transformer. IE leave oil cooled wired 240 v and plugged into single phase, then across the 415v terminals you will have 415v ish single phase. Then because you are not using the welding output of the welder it reaches saturation and uses very little power on standby, and the extra voltage is induced across the other normally redundant coils.
By using an oil cooled welder that keeps the temp down in the tranny core.
This is how in the USA they have 120 and 230v in their houses by using one or two of the generated phases. the large stuff uses the 220v.
You can run off single phase 415v simply by using a 240- 415 oil cooled welder as an auto transformer. IE leave oil cooled wired 240 v and plugged into single phase, then across the 415v terminals you will have 415v ish single phase. Then because you are not using the welding output of the welder it reaches saturation and uses very little power on standby, and the extra voltage is induced across the other normally redundant coils.
By using an oil cooled welder that keeps the temp down in the tranny core.
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Chris Stevens
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This one
View attachment 74553
I've asked the seller if it will run on single phase and if he can palletise.
Supposing he says yes, is it possible that (With the help of everyone on here) I could fix it?
I really want an AC/DC.
All old transformer sets are generally single phase, and will run on 240v. If its a 300A set you will need around 32A supply on 3 phase supply, or 64A if you have 240V single phase. Unless you know exactly whats wrong though, the fact that its mean messed around with, means a good idea to forget it.
You should be able to get a fully working transformer set for about £300. I bought a non working Dialarc for £75 earlier this year complete with watercooler, which only needed attention to the HF points to get it working perfectly (also had WP pencil torch in good condition, which I think sells for over £300).
Tinbasherdan
Bodger in chief
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Wouldn't touch it with yours mate. Cracking machines when they are working, I had one at work for a while . In that state it looks like a door stop
wheresmejumper
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I wouldn't agree with most of this.some transformer sets are 400 only especially tigs with associated circuitry which will fry on 230. Then there are 3x400 arc and tig transformers from kemppi wired more like a mig and won't work on single phase 400v
Jim Davey
R H Davey Welding Supplies Ltd
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Exactly this, single phase does not automatically mean it will work off 240 v. Avoid this machine, it's a pup.
Jim Davey
R H Davey Welding Supplies Ltd
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Sorry Chris but if you are going to pass on advice like this you better do your research. SOME single phase transformers can be configured to run on a lower voltage, but only if they have alternative tapping points on the primary transformer to allow this. HOWEVER many are designed to run on TWO phases at 240v despite stating they are "single phase machines" and will not function if connected to a phase an neutral. I've had to repair many sets installed by people who weren't aware of the issues and that had been damaged by incorrect supply configuration/voltage. IF IN ANY DOUBT SEEK THE ADVICE OF A TRAINED ELECTRICIAN, preferably with experience of welding equipment and its peculiarities. There are plenty of sparks out there who have fallen into the single phase trap and damaged plant by failing to understand the machines supply requirements.
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Chris Stevens
Guest
I used the word "generally", and obviously there are certainly transformer sets without the jumpers to allow them to work from 240v single phase supply. I would guess though most US manufactured transformers probably do have jumpers, to allow them to work on electric supplies of different voltages to those common in the US? Is this something which is clarified in user manuals I wonder?
wheresmejumper
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It's not a matter of just jumpers.its a separate tap on the primary side of the transformer.it will always be clearly indicated on the data plate on the back of the welder,like the murex above
normspanners
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