I come late to this one mate but I have a minarc 151 and so do the other guys on the firm that I work for and we always run 110 volt on the sites. The older inverters used to get a voltage drop on the 110 volt cables, the Kemppi technical rep reckons you won't get that on the 151's but concedes that more than three decent 32amp extension cables will see a drop, and hes right on it. Also those transformers that most of us run on are 'power tool rated' so even though they might be 5 kva, thats intermittent, and the constant rating is something like half. and they can't give the power that the machine wants if half the site is running from it.
You say that the lights go dim when that start machines, if you can, try unplugging everyone (lunchtimes usually a good bet) and give it a go, then throw it at them to put you a tranny there for you.
Some of the firms that I know insist that an armoured 415 or 240 is put on site for welders, on the euro regs you can use a 240 supply on site if its into an RCD. Most of the sites won't have it cause the site rules say 110 volt only but see what happens when the job runs behind or over budget.
You say that the lights go dim when that start machines, if you can, try unplugging everyone (lunchtimes usually a good bet) and give it a go, then throw it at them to put you a tranny there for you.
Some of the firms that I know insist that an armoured 415 or 240 is put on site for welders, on the euro regs you can use a 240 supply on site if its into an RCD. Most of the sites won't have it cause the site rules say 110 volt only but see what happens when the job runs behind or over budget.
