Well, i THOUGHT i'd got the bargain of the century......
A Miller Dynasty 350 for not a lot of money. The manual i downloaded from Miller stated single OR 3 phase leccy but alas i think it IS 3 phase only.
So, ideally i need to find someone with a 240v single phase welder who wishes to upgrade to something like this beast! Maybe swap, plus cash my way?
I am now posting just to get enuff posts under my belt so that i may post in the "for sale" section, before it goes on the evilbay.
It should be multi voltage single & 3 phase (Millers 'autoline' input is one of the features they always big up). Having said that unlike the smaller 200 the 350 is more 3 phase orientated in that the output is lower when hooked upto single phase for example http://www.westcoweld.co.uk/ac-dc-tig-welding-equipment/miller-dynasty-350-dx.htm say...
208-575 V, 3- or 1-Phase Power
Rated Output
3-Phase: 300 A at 32 V, 60% Duty Cycle
Single-Phase: 225 A at 29 V, 60% Duty Cycle
as does the spec sheet http://www.millerwelds.com/pdf/spec_sheets/AD5-0.pdf The manual does (very briefly) state 380/575 V 3 phase with autoline for CE models with no mention of single phase but to me that makes more sense as a nod towards European 3 phase typically not being used at voltages as low as the States do. Or maybe something to do with our advertising laws as the output specs are different in single phase? The manual for CE models still gives specs for input voltages from 208-575 in both single and 3 phase
Is there both 1~ and 3~ symbols on the data plate?
It's a state of the art machine but what's it worth will depend on whether it's still in it's warrenty period and luck in finding a buyer, it's a LOT of machine, more than most need...
My Machine which i have just bought (Cebora tigstar 251), is a also multi voltage machine, fortunately the previous owner only used it in his unit on single phase, so thats how it's wired.
However if i tried to use the machine at home on max power it would pull in excess of 60amps, however as long as i don't (and have no need to) operate the unit at more than 120 amps (approx), it will be fine running through a 32 amp breaker, to be on the safe side though i will run it through a 45amp breaker.