Invertec 350 Pro

[mrmikey]

Got a chance to pick up an Invertec 350 Pro. This machine is a bigger (amp wise) that what I'd ever need, It's capable of running on 575 3 phase @ 27A I think it was, it's also selectable to run on 220 single phase @87A which is what I have available 220 100A service in my garage .
Anyone forsee any probs running at 220V figuring the most I'd ever burn would be a 5/32 7018 or jet? Anyone hazard a guess at the draw at a 200 amp output.....Mike

[Brand X]

Got a chance to pick up an Invertec 350 Pro. This machine is a bigger (amp wise) that what I'd ever need, It's capable of running on 575 3 phase @ 27A I think it was, it's also selectable to run on 220 single phase @87A which is what I have available 220 100A service in my garage .
Anyone forsee any probs running at 220V figuring the most I'd ever burn would be a 5/32 7018 or jet? Anyone hazard a guess at the draw at a 200 amp output.....Mike


I bet you would be hard pressed to pull over 30 amps at 200 amps output. Most inverters don't draw all that much until you really start pushing them. It starts to even out with the old school stuff on the top end. My friend has used his for many years on single phase power, and never had a issue.

[mrmikey]

That's what I was thinking re the draw. If I do get it I'll put an ammeter on it just for my own information.. Thanks for the reply...Mike

[ccawgc]

69 amps at 300 amps on 230 volts single phase.
85 amps at 350 amps on 230 volts single phase.
200 amps should be around 50 amps. 200a at 28v.
200 a at 20 V would draw less current.

[mrmikey]

69 amps at 300 amps on 230 volts single phase.
85 amps at 350 amps on 230 volts single phase.
200 amps should be around 50 amps. 200a at 28v.
200 a at 20 V would draw less current.
I understand what you're saying but I don't think it's an actual linial scale where it's an inverter machine. I.E., if it draws 20A set at 100A output I don't think it'll draw 40A set at 200A output. Then again, I could be full of it GBG......Mike

[slowhand]

I'm working from memory here so bear with me. :)

It's never going to be 100% efficient I don't think, so it's going to draw more current that it puts out. I think it says my XMT is more efficient at lower current and that efficiency goes down as the output goes up. This is pretty typical of about anything I believe. 200A @ 28V output is going to draw more through the power lines than the sum of those two numbers. How much more I can't say but it should be at least 90% efficient (more or less) I think at that output level. I don't know. lol

200a x 28v = 5600 watts / 9 x 10 ( using 90% efficiency) = 6200 watts / 220v = 28 amps.
6kw @ $0.10 KWHr = $0.60 each hour of welding at those settings (no breaks of course).
That should be at least close I would think. lol

Sorry if my memory is wrong. :laugh:

Good luck

[ccawgc]

your numbers only work for single phase power.
my numbers for 300 and 350 amps came from the owners manual and should match the data plate on the welder.
Far as I know these are max load numbers. To be used for selecting cord sizes and line circuit sizes. and showing the max out put of the welder.
most people never weld on these machines close to max.
welding with 0.035 wire at 18 volts will keep you in the 100% duty cycle area.