Miller Compact Blu 201 refurbishment

[SJT69]

Hi everyone, I’m looking for some advice regarding my refurbishment of an old Miller compact Blu 201

The unit was wired with 25mm2 cable (AWG 3) and 10-25 dinse fittings. It looks like someone ran it too long at max and the internal cables became hot.

the main damage is a fried single capacitor, the manual shows later models have 2 parallel capacitors but my serial number starts 0000123*** and this was made with a single FACON capacitor. It’s approximately 150mm x75mm (6”x3”) and all of the markings, other than the name, have long since gone.

I’ve had great help from other forums who guessed the value of the capacitor at 22,000uF at 63v. A High Ripple current model was suggested and maybe 2 or 3 as a bank.

I’m hoping someone can tell me the actual capacitor specifications for this model so I can get exact replacement (s) that match the electrical properties.

I’ve repaired the PCB and the transformers test good. My plan it to tear it down, refurbish the parts, clean/paint it and rebuild it using 35mm2 (AWG2) and 35-50 dinse fittings

I’d appreciate any help on the capacitor value as I may need to fabricate a capacitor frame etc depending on what is available.

I’ll post some pictures of the capacitor unit in it’s current sorry state. I’ve skinned it but there are no markings under the blue plastic. The welder is solid despite surface rust and burned electrics, it’s definitely fixable.

Im in the UK so it’s 240v 50hz


Thank you in advance

[Weld dr]

I looked through all the miller service manuals and owners sadly this unit does not show up a S/N# would help.. is this a Tig or mig welder.
A photo would also help a lot.
..

[Weld dr]

I Googled this unit and i see it is a wire welder i checked the closest unit that is the Millermatic 212 and it runs 4- 191374 capacitors at 30000uf at 45 VDC.
Hope this helps.
.

[SJT69]

Thank you for the information, the original is a single capacitor but I’m more in favour of creating a bank. Computer grade capacitors seems the be the way to go but I’m not sure what Ripple Current they need to take. More capacitors splits the load to each, hence why I’m thinking 3 or 4 rather than one big one. Here’s the serial and some pictures of it.

[1997CST]

I Googled this unit and i see it is a wire welder i checked the closest unit that is the Millermatic 212 and it runs 4- 191374 capacitors at 30000uf at 45 VDC.
Hope this helps.
.

I'm thinking that 4 pack will be plenty to smooth the weld 209300 gets you the complete unit with crossover bars.$221.00 cost isn't bad $321.00 list.
Sure beats the cost of a new welder. Are they getting really expensive or am I just old??