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Thread: Welder Tripping

  1. #1
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    Default Welder Tripping

    Quick one for the electricians. I have a very old school oil cooled welder which although old works well and does what I need it to do.

    The problem is my 20amp breaker in the garage keeps tripping if I try weld for more than 20sec at a time which makes for slow going.

    The breaker is supplied by 5 or 6mm cable can I up the breaker size and if so to what or am I at the limit of the supply and to a bigger upgrade.

    Thanks
    Last edited by warrenpfo; 2022/01/23 at 11:32 AM.

  2. #2
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    Default Re: Welder Tripping

    Picture of weber. I never go above medium on the sophisticated dial adapter Click image for larger version. 

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  3. #3
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    Default Re: Welder Tripping

    I am sorry, but I can't resist.

    If your welder keeps on tripping, I'd suggest searching his pockets before he starts working.


  4. #4
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    Default Re: Welder Tripping

    Those welders draw alot of amps,mine use to do the same,oil was low
    Maybe check your oil level also the transformer might be running hot

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  6. #5
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    Default Welder Tripping

    Try a lower setting and see what happens.

    A slow trip (20 seconds of welding) could mean......
    you are drawing 19.9amps

    breaker is old/ faulty (the more it trips, the “older” it gets)

    The welder is packing up (only starts acting up when the internals warm up)

    Maybe it’s time for a new inverter type welder (depends how much welding you do..... running costs will be lower)

    As for changing the breaker (bigger) .... most houses in SA were wired with 1,5mm (lights), 4mm (plugs, geyser, stove)

    Theoretically, you can go up to a 30amp breaker on 4mm wire, but you should get a licensed sparky to check everything first.
    Last edited by GaryFrank; 2022/01/23 at 12:33 PM.

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  8. #6
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    Default Re: Welder Tripping

    Ons het selde welder. Sy olie kan dalk laag wees. Of sit n grooter breaker op. Ek het 35 amp breaker opgesit. Trip die krag nie meer nie

  9. #7
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    Default Re: Welder Tripping

    Quote Originally Posted by warrenpfo View Post
    Picture of weber. I never go above medium on the sophisticated dial adapter Click image for larger version. 

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Views:	71 
Size:	136.7 KB 
ID:	644899Click image for larger version. 

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ID:	644900
    Input needed is 230v, with 30amps.
    20amp breaker will trip after a while. It will heat up and trip.

    4mm wire. 30 amp breaker.

    Or new inverter.

    F

  10. #8
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    Default Re: Welder Tripping

    Quote Originally Posted by Fomo View Post
    Input needed is 230v, with 30amps.
    20amp breaker will trip after a while. It will heat up and trip.

    4mm wire. 30 amp breaker.

    Or new inverter.

    F

    To my knowledge you are not allowed to supply the standard socket outlet with a 30A circuit breaker.

    So, in addition, you will need to find a suitably rated socket outlet and then also change the plug on the welder

  11. #9
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    Default Re: Welder Tripping

    Ok thanks guys. I will check out level in welder, get a sparky out to upgrade greater and add a suitable plug to both welder and socket. I think its those 3 pib blue campsite style plugs

  12. #10
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    Default Re: Welder Tripping

    .
    Last edited by Tiaan Pot; 2022/04/13 at 06:37 PM.

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  14. #11
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    Default Re: Welder Tripping

    Quote Originally Posted by GaryFrank View Post
    Try a lower setting and see what happens.

    A slow trip (20 seconds of welding) could mean......
    you are drawing 19.9amps

    breaker is old/ faulty (the more it trips, the “older” it gets)

    The welder is packing up (only starts acting up when the internals warm up)

    Maybe it’s time for a new inverter type welder (depends how much welding you do..... running costs will be lower)

    As for changing the breaker (bigger) .... most houses in SA were wired with 1,5mm (lights), 4mm (plugs, geyser, stove)

    Theoretically, you can go up to a 30amp breaker on 4mm wire, but you should get a licensed sparky to check everything first.
    Gary just FYI a 20A circuit breaker doesn trip at 20 A

    In fact a C curve CB wount even trip a constant 25A


    https://www.electricalclassroom.com/...b-trip-curves/

  15. #12
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    Default Re: Welder Tripping

    Quote Originally Posted by Tiaan Pot View Post
    You would be better off spending R2k on an inverter welder.

    Will probably cost you less
    Agree

  16. #13
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    Default Re: Welder Tripping

    My BIL lent me his oil cooled welder and it tripped if I welded too long. Then my dad gave his old Afrox air cooled welder. It's so quiet and draws far less than the oil cooled welder.

    To the OP, get sparky to run a new circuit to garage using 10mm Sq wire and a welding plug, although this exercise will cost more than an inverter welder, the choice is yours.
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  17. #14
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    Default Re: Welder Tripping

    According to regulation if you install 25amp CB you need to have circuit breakers at each plug point on that circuit. I have am air cooled welder which I installed a 4x4 fan in it as it it used to trip the thermostat when it got hot. Have since bought an inverter welder that does duty when out and about. Far lighter than air cooled welder on power as well.

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