Murex welder ?

[super noob]

Hi guys, first post on here but been reading past topics and using the the tutorials for a while now


I'm looking at getting an AC/DC TIG welder to use at home, there was a Murex 355 Transtig down the road from me that I was offered but declined then it sold however the seller has had no contact from the buyer etc etc so it may be back up for sale again at the end of the week/next week

It was going to be £500, new torch (water cooled), water pump, stick welder lead and a trolley, possibly a large canister of argon too. Should probably have snapped it up tbh but thats life isn't it get offered something, think about it, decline, then want it again

So my question is and this is based if it comes up for sale again (if not may get the miller equivalent off ebay)

They are a single phase welder that can run off three phase etc but I only have single at home (where I'd use it) as well as minimal storage space. So I know it can be rewired for single phase by moving the pins as I looked online at the manual and I will never really have a use for its full 325A power but would it be able to do 6mm steel (may root it slightly) without tripping the breaker all the time ?

I'd be running it off the old socket for the deep fat fryer (ex hotel) so should have a decent fuse on it ?


Oh it would also be stored outside off the floor in a dry but probably rather cold shed

Heres the back plate

Other question is if this is not suitable for home use would a Lincoln 160t-pulse be ok for home use on thick stuff ? I make off road stuff at home like bumpers, winch trays etc

 

[Wozzaaah]

You could use that at home but it would need a 45A feed as a minimum, anything less than that would probably trip when turning the beast on as the inrush current is huge!
They're also massive machines so make sure you've actually got room for it....and some way of loading it!!
Reckon on it weighing around the 220kg mark and you probably won't be far off.

 

[super noob]

Cheers mate Well I think the fryer should have something large like that! If not I'm sure one of the other outlets or the main breaker could be wired up by the electrician so I can use it

Its literally 400m down the road from me and I've got a landrover + trailer so thats not a problem haha, even got a workshop crane to pick it up with. I went to view it to take that picture and yes it is huge! The guy reckoned it was about 330lb but 220Kg would be 485lb haha either way I've got the space and means to move it

 

[wheresmejumper]

i used one of them on a tig course,it gets (ab)used 12-16 hours a day and it hasnt missed a beat since bought.
it will work at either voltage

 

[super noob]

Gonna hope it goes back up for sale then if not may have to get the miller aircrafter thats up for sale as I think that can be jumped too, waiting for the plate pic though

 

[super noob]

Ok, that ones gone but been offered a Hobart



Same kinda output and plate is similar on the back! Before I pull the trigger on this one can anyone confirm that it'll run the same as the first one on a big 230v 100A circuit ?

 

[super noob]

Could an electrician confirm this please

Could an electrician please confirm that this could be run on a single phase 100A supply circuit ?

Would be perfect if it does! Its a big TIG

 

[Justme]

No.

At 220v it needs 125 amps.

Its only 72.6 amps at 380v 3 phase.

 

[super noob]

No.

At 220v it needs 125 amps.

Its only 72.6 amps at 380v 3 phase.

That would be if I was to run it at full pelt though, I doubt I'll ever need to use its full 300A output so was thinking I could skimp a bit

But at 220V it should be ok on a home supply and the 100A circuit as long as I don't crank it up full whack ?

 

[madkayaker]

You have a 100a main fuse (DNO fuse) you then need to fit an 80a after that to allow diversity. It will run but if you turn up the beans you risk blowing main fuse (cue lots of issues with electricity north west to get it changed as its THERE fuse and a sparkey is not allowed to change it)

 

[super noob]

Its a big black fuse at home, which I presume is a 100A, if I was to fit an 80 or a 90 would you think I'd be able to turn it up to somewhere around 240A output as I'm pretty sure that'd do me just fine for welding 5-8mm with a good root and gap on it for the thick stuff

 

[madkayaker]

You need to fit a fuse after that one. Next down from 100 is 80. Idea beng is if you turn up to high it blowed the 80 (which is you fuse to change) before the 100 main fuse

 

[super noob]

Excellent thanks, 80A so in theory it has a 450A max output according to the plate on the front and it needs 125A to run that so lets say 130A to be safe

Therefore I get about 3.46A output for every amp in, so 80 x 3.46 = 276.92A output at a full 80, which means I should comfortably get 250A output on an 80A circuit


If my maths makes sense!

 

[@Turbo]

yea it is single phase.

 

[brightspark]

Its a big black fuse at home, which I presume is a 100A, if I was to fit an 80 or a 90 would you think I'd be able to turn it up to somewhere around 240A output as I'm pretty sure that'd do me just fine for welding 5-8mm with a good root and gap on it for the thick stuff

u cant presume. the cutout holder may take a 100amp fuse but possibly only fitted with an 80 amp .wanna buy some seals and a spare fuse

 

[500e]

No allowance for internal loss\efficiency factor & remember fuses get tired.

 

[mike 109444]

Its a big black fuse at home, which I presume is a 100A, if I was to fit an 80 or a 90 would you think I'd be able to turn it up to somewhere around 240A output as I'm pretty sure that'd do me just fine for welding 5-8mm with a good root and gap on it for the thick stuff

Not an electrician but you seam to be presuming it's 100A. Might want to check that first.

 

[the snooper]

even if it is a 100 amp fuse and you only draw 80amps with the welder if appliances in your house are drawing just over 20 amps you will still blow the 100 amp main fuse

 

[shenion]

Therefore I get about 3.46A output for every amp in, so 80 x 3.46 = 276.92A output at a full 80, which means I should comfortably get 250A output on an 80A circuit

It is not that simple. As you raise the output current, the voltage goes up also; so the power need grows exponentially. Also there is more loss in the transformer windings to heat.

My beast does about 220A on a 50A breaker at 240V. You might get 250 on 80A.

IT also depends on if it has power factor correction. Mine does 475A also but the spec plate says 108A at 220V (probably just under 100 at 240)V. Models without power-factor correction show about 20% more current.

 

[super noob]

Looks like I've opened a can of worms


Will have to check the breaker then! Would be happy with 240A output tbh, cant see me needing more than that on the TIG and if that doesn't cut it I'll just swap to stick and burn it