Hi.
I have an ESAB Smashweld 180 3-phase 220/380V with a major problem.
Hopefully someone here can help me out with the information needed to to repair the machine.
The primary windings on the small transformer for power supply to the control card and the contactor/relay is burned. Hence no power on the secondary side.
I will rewind the primary side, but I need to know what the voltage is supposed to be on the secondaty side.
The power to the control card is the Green and Yellow wires and the power to the contactor/relay is the Blue and Brown wire.
I only need to know the voltage for one of these. (Green and yellow or Blue and Brown).
This way I can find the number of turns on the primary side, as the secondary side is OK and I will leave it as it is.
Is there anybody here who know the voltage, or coud measure this for me on their own machine please?
I have tried every thing. First I contacted ESAB in hope to get at least their scematics with information about voltages on the card, to determind what voltage I need from the transformers secondary side.
The short version is that they no longer have any documnentation for the Smash Weld 180, as it is too old. They only have the user manual, and told me that parts are no longer available for this machine.
Next, I tried to unwind the primary, while counting the windings, but I came to a stage where they were impossible to unwind anymore, as the kept breaking, due to the melted the insulation.
I have the CU wire (0,22mm with coating. 0,2mm without coating) and I am ready to start rewinding it back to original stage.
I have the formula to calculate an average transformer core, but here are variations on these calculations from one manufacturer to the other, resulting in different output voltages, when the secondary windings are beeing used as they are.
To get the transformer correct, I need to know the voltages on the secondary side (to the card and the contactor). This way I can rewind it according to my formula and then measure the voltage.
From this I can calculate if I need to remove or add windings, to get the right voltage.
I really appreciate your help!