Thermal Arc LT-300
Found at dump, Thermal Arc LT-300, brought it home without looking at
it closely. Turns out to be 3 phase 460/565V. I have 3 phase 220v via a 3hp rotary converter. Is there a way to make this all work? I have no idea if the welder has a fired board or something anyway, but it may be that the last guy just didn't have 460V either. The cord has been cut off. Or should I just take it back to the dump? Scott |
Thermal Arc LT-300
On Mon, 13 Mar 2006 19:51:36 -0500, SCOTT
wrote: Found at dump, Thermal Arc LT-300, brought it home without looking at it closely. Turns out to be 3 phase 460/565V. I have 3 phase 220v via a 3hp rotary converter. Is there a way to make this all work? I have no idea if the welder has a fired board or something anyway, but it may be that the last guy just didn't have 460V either. The cord has been cut off. Or should I just take it back to the dump? Open it up, clean out the big chunks, blow out the little ones using compressed air and a paintbrush as encouragement when necessary. :-) Then get in there with a strong light and look for obvious signs of "blowed-upedness". (Yes, it's a new word - we like doing that in English. It's the past tense uncertain of blowed-up.) ;-P Use your nose, many blowed-up components are easily identified by scent. (Somehow, stuff like that sounds better with a patently fake- sounding Southern Accent slathered on. But that's just me.) ;-) Don't waste time trying to fix it or develop a way to power it at home, that will be a big waste of time - especially if you don't even know if the stupid thing works yet. Go find a friend or acquaintance with an industrial shop somewhere close that has some utility supplied 480V 3Ph you can borrow, scrounge up a set of cables, and see what happens when you try powering it up and striking an arc. Who knows, it might only have a small problem that can be fixed cheap - plug the loose cooling fan cord back in and replace the one diode that overheated first. The ideal friend would have recently moved his fab or welding shop into to a bigger building with a 480V 3Ph Utility feed, and he's been running his old smaller rig looking for a big 'un just like you found. You walk in with that monster and watch him turn green... Swap straight across for his old 240V 1Ph rig that you can plug in and use at home, with visitation rights reserved for when you have big jobs that need a big welder. -- Bruce -- -- Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop Electrician for Westend Electric - CA726700 5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545 Spamtrapped address: Remove the python and the invalid, and use a net. |
Thermal Arc LT-300
Follow up:
I took the cover off, looks like someone had already (a couple of screws missing from the cover), and found no signs of any blowed uppedness. I did find, however a broken off zener diode, which fell out of the bottom. Maybe that's all that's wrong with it, or not. I guess I'll sit on it for awhile, if I ever run across someone with 3 phase 460V, I'll replace the diode and see if it works. Scott In article t, SCOTT wrote: Found at dump, Thermal Arc LT-300, brought it home without looking at it closely. Turns out to be 3 phase 460/565V. I have 3 phase 220v via a 3hp rotary converter. Is there a way to make this all work? I have no idea if the welder has a fired board or something anyway, but it may be that the last guy just didn't have 460V either. The cord has been cut off. Or should I just take it back to the dump? Scott |
Thermal Arc LT-300
On Sat, 18 Mar 2006 18:44:27 -0500, SCOTT
wrote: Follow up: I took the cover off, looks like someone had already (a couple of screws missing from the cover), and found no signs of any blowed uppedness. I did find, however a broken off zener diode, which fell out of the bottom. Maybe that's all that's wrong with it, or not. I guess I'll sit on it for awhile, if I ever run across someone with 3 phase 460V, I'll replace the diode and see if it works. Where do you live? Might be someone here within reasonable driving distance where you can test it. They might be looking for one... -- Bruce -- -- Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop Electrician for Westend Electric - CA726700 5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545 Spamtrapped address: Remove the python and the invalid, and use a net. |
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