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source for oil-filled caps?

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  • source for oil-filled caps?

    anyone know a source for oil-filled capacitors to work on this phase converter project of mine? or am i just better off buying one of the kits with no motor off ebay?

    andy b.
    The danger is not that computers will come to think like men - but that men will come to think like computers. - some guy on another forum not dedicated to machining

  • #2
    If you do find a source of oil filled caps don't take any older than about 1975. They will probably be PCB filled. Major disposal headache.

    I looked it up, the exact date is July 1, 1978. Anything before that is probably PCB filled.

    [This message has been edited by Evan (edited 10-22-2003).]
    Free software for calculating bolt circles and similar: Click Here


    • #3
      Although presumably if they work he won't be disposing them........


      • #4
        Not if they develop a leak or burst!


        • #5
          I have not purchased capacitors from this place, but they were very good for motors. I have no connection with them.


          • #6
            WW Grainger,McMASTER-Carr are two good places,also a/c shops and junkyards that take old commercial a/c units.

            After doing some research on this topic I have found that the load on the caps is kept to no more than 5 amps per cap,so divide your total load in amps by 5 and that is the number of caps you will need as a minimum.

            However,if you are building a pony or idler motor converter you do not need the caps if you start the converter with a pull rope or a small single phase motor,if fact they will cause over heating.
            I just need one more tool,just one!


            • #7
              Any capacitor of the suitable types will have either a KVA (apparent power) or a current rating. The apparent power gives the amps if divided by the specified voltage.
              You might have to dig to find the rating if it isn't marked.

              A capacitor which is OK will be marked "no pcbs". No marking? No guarantee.


              • #8
                Just buy the caps off of ebay. I bought a few at a very reasonable price. I cannot remember the seller, but he had tons of them. I bid on the listed ones, then emailed that I wished him to include others when he shipped. He was great to work with.
                I just went over and checked my feedback. the seller's name is, sawyer335. Look him up and ask if he has run caps, he has start caps on ebay now. Mike


                • #9
                  Contact any HVAC installer. They replace equipment and are a source for oil filled capacitors