Is this spot welder three phase or single phase?
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  1. #1
    Join Date
    Sep 2014
    Location
    Greensburg Pa
    Posts
    457

    Is this spot welder three phase or single phase?

    Have this spot welder and would like to set it up and use it. Any idea if its single or three phase? Assuming single since i only see two spots to screw the hot leads down plus a screw for the ground on the body.

    ???
    Also, i guess this thing needs to be cooled with water? All the lines indicate some water cooling.

    Is this really neccessary to water cool this thing if im just spot welding sheet metal? I mean those two solid chunks of copper should heat sink VERY well lol.

    Thanks! Never used a spot welder like this.
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    Dynasty 200DX (2014)
    Millermatic 211 (2015)
    Optrel 864 (2014)
    Smith Medium duty MBA 30510 (Xmas 2014)
    Tennsmith 16ga 4ft finger brake (2015)
    Trailblazer 325 EFI and excel
    Thermal dynamics Cutmaster 82
    Miller maxtron 450

  2. #2
    Join Date
    Jun 2012
    Location
    Ct
    Posts
    2,004

    Re: Is this spot welder three phase or single phase?

    If it only has 2 contact points then, that gives it away


    Besides, the label says, primary voltage, 220

  3. #3
    Join Date
    Sep 2014
    Location
    Greensburg Pa
    Posts
    457

    Re: Is this spot welder three phase or single phase?

    Ya i guess ur right phil. When i pulled this machine and a few others from a shop i cleaned out all the guys equipment was 240v 3 phase and the breaker i shut off when disconnecting all this equip was a 3 phase panel so thats kinda why im asking. The thing is old enough and big enough that i would assume its three phase. Kinda dumb it doesnt say anywhere if its single or three phase and zero literature online about this company.

    Guess ill find a water cooler and run it

    Dynasty 200DX (2014)
    Millermatic 211 (2015)
    Optrel 864 (2014)
    Smith Medium duty MBA 30510 (Xmas 2014)
    Tennsmith 16ga 4ft finger brake (2015)
    Trailblazer 325 EFI and excel
    Thermal dynamics Cutmaster 82
    Miller maxtron 450

  4. #4
    Join Date
    Aug 2014
    Location
    B.C. Canada
    Posts
    761

    Re: Is this spot welder three phase or single phase?

    Quote Originally Posted by outdoort View Post
    Ya i guess ur right phil. When i pulled this machine and a few others from a shop i cleaned out all the guys equipment was 240v 3 phase and the breaker i shut off when disconnecting all this equip was a 3 phase panel so thats kinda why im asking. The thing is old enough and big enough that i would assume its three phase. Kinda dumb it doesnt say anywhere if its single or three phase and zero literature online about this company.

    Guess ill find a water cooler and run it
    Too bad you didn’t check to see if there were two or three wires connected to the breaker. He may have been using two legs of the three phase to run the 220V single phase spot welder.


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  5. #5
    Join Date
    Jun 2012
    Location
    Ct
    Posts
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    Re: Is this spot welder three phase or single phase?

    What's the last pic of? Take a pic of where the power goes into the machine

  6. #6
    Join Date
    Oct 2014
    Location
    Elizabethtown, KY
    Posts
    16

    Re: Is this spot welder three phase or single phase?

    Was it plugged in or hard wired? That could give you another clue but with the pix of only two fuses then I'd suspect it's single phase.

  7. #7
    Join Date
    Mar 2017
    Location
    bar stool
    Posts
    2,103

    Re: Is this spot welder three phase or single phase?

    I find it generally a good indicator a machine is single phase when there is no terminal to hook a 3rd phase wore to in the machine.

    That puppy is single phase.

  8. #8
    Join Date
    Mar 2015
    Location
    Milwaukee, WI
    Posts
    262

    Re: Is this spot welder three phase or single phase?

    20kVA @ 220VAC requires a minimum 120A breaker according to this:
    http://www.weldtechcorp.com/document...uitbreaker.pdf

  9. #9
    Join Date
    Sep 2014
    Location
    Greensburg Pa
    Posts
    457

    Re: Is this spot welder three phase or single phase?

    Was hard wired and i was in a rush so i threw the breaker, checked with a multimeter for zero power and disconnected. Wish i could remember how it was wired but i dont see there being a additional hidden third leg hook up anywhere.

    Metal man: the pic with the fuses is where the hard wired power came in. U can see the conduit hole right above.

    A sheet metal spot welder really pulling 120amps!!!???

    Dynasty 200DX (2014)
    Millermatic 211 (2015)
    Optrel 864 (2014)
    Smith Medium duty MBA 30510 (Xmas 2014)
    Tennsmith 16ga 4ft finger brake (2015)
    Trailblazer 325 EFI and excel
    Thermal dynamics Cutmaster 82
    Miller maxtron 450

  10. #10
    Join Date
    Mar 2015
    Location
    Milwaukee, WI
    Posts
    262

    Re: Is this spot welder three phase or single phase?

    Marry in haste, repent at leisure.

  11. #11
    Join Date
    Mar 2017
    Location
    bar stool
    Posts
    2,103

    Re: Is this spot welder three phase or single phase?

    Quote Originally Posted by outdoort View Post
    Was hard wired and i was in a rush so i threw the breaker, checked with a multimeter for zero power and disconnected. Wish i could remember how it was wired but i dont see there being a additional hidden third leg hook up anywhere.
    A sheet metal spot welder really pulling 120amps!!!???
    On single phase a water cooled machine can draw more than 120 amps easily. I'd even bet a buck that one can for the initial fraction of a second it's triggered.

  12. #12
    Join Date
    Dec 2016
    Posts
    24

    Re: Is this spot welder three phase or single phase?

    seems this one is single phase with a max output of 4.4 v at 400A max so about 1800w according to name plate.unless this is the h2o cooler plate?
    what size are the fuses?
    Last edited by filetobeef; 12-07-2018 at 11:08 PM.

  13. #13
    Join Date
    Jun 2007
    Posts
    180

    Re: Is this spot welder three phase or single phase?

    I can be wired up to single or 3 phase. It only needs two of the 3 wires on 3 phase. If wiring in a 3 phase box make sure you stay off the high leg.

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