can anyone identify my single ph,murex mig welder

  1. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    i bought this welder and it worked, and is still working [sometimes badly]

    but it has took out 3x 13amp fuses [when on a middle setting]

    and has tripped an rcd twice,
    it also blew a few, 1amp fuses on the small transformer,

    the seller said it was a murex 200...but i cant find a 200amp model, and it looks physically big,
    i think its from the mid 80's...?
    single phase ,
    it does not have a identification plate on it
    it has 2 cooling fans
    and a 13amp socket fitted at the rear, [looks original]

    [​IMG]

    i dont know if this rotart power switch is original

    [​IMG]

    inside ...

    [​IMG]





    non original numbering.

    [​IMG]


    wire and feed motor

    [​IMG]

    many thanx in advance guys
     
  2. mike 109444

    mike 109444 Member

    Messages:
    4,302
    uk Bristol
    What ever the faults I would do something about the 240 socket that has its connections open !!! Right next to a spool of uninsulated wire never mind your hands when sorting spool
    Look for chafing wires or pinched or signs of wires having got hot due to poor connections. ALL WITH IT UNPLUGED COS YOU DON'T KNOW WHAT ELSE MIGHT BE BODGED.
     
    monky harris likes this.
  3. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    cheers mike ;)

    ive not been inside it yet except to change the 1 amp fuse,
    its on loan at the moment so im just doing some research...

    will tread carefully...which is now't new ...as im a sparky and repair appliances for a living...

    i suppose your right about the skt, but it looks like it was always there as its fixed to lugs in the case ..?
     
  4. Robotstar5

    Robotstar5 Casanunda Staff Member

    Messages:
    18,266
    Location:
    Birmingham
    If it was original, it wouldn't be wired into the incoming side of the connector strip with a bit of flex.
     
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  5. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
    Very few of the old murex machines were built to run off 13amp plugs. Nearly all the single phase ones were rated 32amp and most stuff from them at 200 amps plus back then was 3phase.
    I'd try it on a 32amp plug and see if you get results.
    (After you've tidied up the internal wiring). ;)
     
    monky harris likes this.
  6. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    nice reply...
    do you think this may have been a 3ph unit and has been converted..?
     
  7. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
    I'm not sure . It's odd as well because it looks very similar to the old transmig 230 which was 3phase but I never heard of them doing a transmig 200. image.jpg
     
  8. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
    Tradesmig 230 sorry
    The transmig was a different model.
    I think that's what you have got there a trades mig 230 and I think your issue is it was originally a 3phase machine maybe it can be used for single phase too but not off a 13amp plug no way.
     
  9. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
  10. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
    Bit of info I did not know the trades mig 240 is single phase so it might be that one but it's an old tradesmig that's for sure. And they were brilliant to say the least.
     
    monky harris likes this.
  11. the snooper

    the snooper getting older by the day

    Messages:
    20,633
    Location:
    Hull UK
    could be a 160 $_86.jpg
     
  12. Pete.

    Pete. Member

    Messages:
    9,819
    Location:
    Kent, UK
    Looks like you only have a 4-diode bridge where the 3-phase ones have a 6-diode bridge in the schematic.
     
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  13. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    Wow... Nice work guys..:clapping:
    it does seem to be a mixture.....?
     
  14. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    There is a 130s for sale on eBay ;) on the south coast,
    A similar welder

    Looks an ideal bit of kit. :cool:
     
  15. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
    If yours was a 130 or 160 would it be tripping the mains on a 13amp plug? Unless there is a fault there
     
  16. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    you could be right richard..?

    it did these welds with gassless wire and they are pretty big, :welder:
    a block of steel tacked to a bit of rsj....
    on a 13 amp fuse ...:laughing:

    its my bench anvil now ..:)


    [​IMG]


    there not pretty but there solid ...

    [​IMG]
     
  17. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    i will be adding a bigger circuit to the workshop,
    to see how it performs when i get it back,
     
  18. Richard.

    Richard. Forum Supporter

    Messages:
    18,351
    Location:
    Cambridgeshire
    Yep do that then measure the machines max current with an amp meter then you will know which tradesmig you have.
    Ill bet it's a 240 as this is a single phase machine.
    Be good to find out.
     
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  19. monky harris Member

    Messages:
    735
    Location:
    northampton nn5
    Update..
    I have the murex back ...
    I found the gas valve was not working,
    and have fitted a new valve ..

    it is now running well on mid range power ..with 0.8 wire...
    It is a smooth machine to weld with..:welder:

    There may well be more faults in the future...:confused:
    . I will keep you posted..
     
  20. mike 109444

    mike 109444 Member

    Messages:
    4,302
    uk Bristol
    Hope you sorted (removed) that socket :whistle:
     
    Richard. likes this.
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