Power Factor Correction for '85 Idealarc 250
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  1. #1
    Join Date
    Jun 2009
    Location
    Draper, UT
    Posts
    353

    Power Factor Correction for '85 Idealarc 250

    After a member PM'd me for details on how the PFC was installed on my new-to-me Idealarc 250, I figured I'd disseminate the info to all.

    The schematic:
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    the caps in place
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    the wire gauge for the attachments
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    the taller cap
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    the shorter cap
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    MillerMatic 252, HTP 221 w/cooler, Hypertherm PM45, Lincoln Idealarc 250

    "I'd like to believe as many true things and as few false things as possible"

  2. #2
    Join Date
    Jun 2009
    Location
    Draper, UT
    Posts
    353

    Re: Power Factor Correction for '85 Idealarc 250

    There is no real wiring harness to speak of, just this clusterf**k of what looks like tape wrapped wirenuts

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    MillerMatic 252, HTP 221 w/cooler, Hypertherm PM45, Lincoln Idealarc 250

    "I'd like to believe as many true things and as few false things as possible"

  3. #3
    Join Date
    Sep 2013
    Location
    west texas
    Posts
    2,350

    Re: Power Factor Correction for '85 Idealarc 250

    If you can't find actual 480v power factor correction caps use motor run caps wired L to N.
    Wiring in a standard 440v motor run cap L to L on a 240v circuit it will last less than 5 minutes.
    Last edited by mad welder 4; 01-12-2018 at 02:44 AM.
    old Miller spectrum 625
    Lincoln SP-135 T, CO2+0.025 wire
    Miller model 250 (dialarc) stick AC/DC and WP-18V torch
    Craftsman 100amp AC/DC and WP-17V torch
    Century 115-004 HF arc stabilizer, now with foot switch!!
    Home made DR44G alternator welder

  4. #4
    Join Date
    Jun 2009
    Location
    Draper, UT
    Posts
    353

    Re: Power Factor Correction for '85 Idealarc 250

    No neutral on this welder, just a ground.
    MillerMatic 252, HTP 221 w/cooler, Hypertherm PM45, Lincoln Idealarc 250

    "I'd like to believe as many true things and as few false things as possible"

  5. #5
    Join Date
    Dec 2010
    Location
    SW OH
    Posts
    15

    Re: Power Factor Correction for '85 Idealarc 250

    Thanks for all the info, including the PFC specs & wire specs. FYI for anyone considering adding PFCs, I'vd been told the Lincoln stocks are close to NLA levels.

  6. #6
    Join Date
    Sep 2013
    Location
    west texas
    Posts
    2,350

    Re: Power Factor Correction for '85 Idealarc 250

    Then line to ground.
    old Miller spectrum 625
    Lincoln SP-135 T, CO2+0.025 wire
    Miller model 250 (dialarc) stick AC/DC and WP-18V torch
    Craftsman 100amp AC/DC and WP-17V torch
    Century 115-004 HF arc stabilizer, now with foot switch!!
    Home made DR44G alternator welder

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