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Old 11-02-2011, 02:40 PM
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allessence allessence is offline
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Default Running 3phase welder on RPC?

I remember seeing it discussed here some where but can't seem to find it.

It's 230V 3ph and will draw 52amps @ full out put of 500amps

I doubt I will be running it anywhere close to that since most of the stuff will be 22Gauge up to maybe 1/2".

It's an older 2003 machine.

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DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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  #2  
Old 11-02-2011, 03:15 PM
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Jen
can you give us a model number?? something like a Miller Deltaweld 452??? maybe??..........

think this may have been the thread that you are looking for... although most of it concentrated on cheating it with capacitive phase shift....

http://shopfloortalk.com/forums/show...hase+converter
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Last edited by H80N; 11-02-2011 at 03:37 PM. Reason: addl info
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  #3  
Old 11-02-2011, 06:19 PM
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I was looking into this awhile back and decided an inverter was a better
choice for me. I was buying new either way. But if you have a machine
and need power that is a different story.

To run a resistive load which is what welders are, high current draw for
extended times the RPC mfr's all said the same thing derated them 70-80%.

Sooo... you need 52 good amps. You need a RPC that has a name plate
rating of:

(52)/(70%)=74 amps
(52)/(80%)=65 amps

Between 65-74 amps and you should be good to go!

I have a unit from these guys:

http://www.electram.com/

About 10 years old and not one issue with it! Runs great. Was too quite so
I added a pilot light on it. Great Support after the purchase, when I was
installing it, I call and the talked me through it.
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Old 11-03-2011, 06:10 AM
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it's an Esseti. produced by SOLwelding of Italy or Excl-Arc in NZ.

http://www.esseti.co.nz/

this is the newer version

http://www.esseti.co.nz/xamig500swf-...der-p-103.html

Over the years I've looked at EU welders and they have been more advanced as to what is being offered.

the Miller dynasty series of inverters are actually based on European models a few years older. With this in mind I think it maybe a decent machine. Problem becomes if one needs any parts.

I'm supposed to go back on Friday to see it in operation.
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Jennifer

If I defend myself I am attacked.

My meaningless thoughts are showing me a meaningless world.

My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

My google+ page

DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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  #5  
Old 11-03-2011, 08:25 AM
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Jen
I have had a couple of Cebora Tig machines and a Kemppii Tig... they were good machines but I was the loneliest guy on the continent if I needed service or support....
Am curious... what about this machine attracts you over something like a Millermatic 350P??? I have a 350P and it does all I need plus a bunch more for a MIG machine... and the support is excellent..
As far as design.... years ago the European machines were more advanced... these days not so much...
just curious as to what makes this one attractive to you..
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Old 11-03-2011, 08:26 AM
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Weldingweb thread which may be of interest:

http://weldingweb.com/showthread.php...ghlight=esseti

Quote:
I am not to familiar with what Esseti is doing now because they stopped dealing with us when they started selling inverters to Lincoln exclusively.
If I got one I'd get it cheap in case it croaks, but there are plenty of supported red/blue/yellow used machines on the market. That would be something to have if you already have other machines so downtime won't matter.

Features are nice, but even if you do all your own welding machine maintenance the parts have to come from somewhere...
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Old 11-03-2011, 08:57 AM
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Default Orphan++++

From the WW thread that Monckeywrench posted.. sounds like these machines are worse off than orphans.... savings on the front end.......... but throwaway if needing service..... ADDED to... how much will it cost you to get 440v 3ph from your 240v single ph????... not seeing any REAL savings (the phase conversion is relatively easy with a RPC... but you will need a step up transformer to get your 440v)

--------------------------------------------------------------------------------

No I do not, the only machines I have left is a new Thermal Arc 251 for $1800, I think it list for $2400-2500, and dozens of Esseti's that no one services and parts are scarce, we currently use Esset's in our shop for doing bridge work. The Esseti's are all 460v 3 phase machines as well.


my advice is run... RUN like the wind!!! it is a trap!!!
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  #8  
Old 11-03-2011, 09:03 AM
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II would ask my friend that uses RPC's to run his welders to join the forum and offer his insight on this subject but he injuered his back a month or so ago changing a Bobcat tire and it only seems to be getting worse, so his good humor is gone. About the same as Jack finding out he has to go to Vermont. I will test the waters today.
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  #9  
Old 11-03-2011, 09:26 AM
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Quote:
Originally Posted by allessence View Post
Over the years I've looked at EU welders and they have been more advanced as to what is being offered.

the Miller dynasty series of inverters are actually based on European models a few years older. With this in mind I think it maybe a decent machine. Problem becomes if one needs any parts.

I'm supposed to go back on Friday to see it in operation.
Really? Not so much... I strongly suggest you stick to Red or Blue...
maybe Yellow... Yellow = EASB and is the only EU welder I would
purchase and trust. Just because they put fancy digitial displays and
knob on things does not mean it is more advanced. A local mfr welding
alot of aluminum bought some Mig unit, forgot the name F-something.
They needed and I quote, "A fucking eletrical engineer could not
figure this damned thing out." Why I remember that quote is the
guy who said it never ever cusses.

I have been in many manufacturing plants in the EU half the time you
see Miller's and Lincoln's in European plants (more Red than Blue) and
1/2 the time you see something European and that is mostly Yellow.
When I see EU machines in a US plants (and I would not run out of
fingers counting the number of times that happened) they are often
off to the side waiting on parts, or just forgotten like a bad hangover.
But my point is you almost never see EU machines (except ESAB/yellow
mentioned above) in US plants and see significant Red and Blue in the
EU. That alone should tell you loads.

I would think real hard on that decision.
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  #10  
Old 11-03-2011, 10:25 AM
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The "F" welder is probably a Fronius.
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