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  • Potential Relay

    Here is a ? for you guys using the Potential Relays from Stahls for your combo motors more specifically with Westinghouse. I have converted 4 lanes over with the relays on the table and sweep. I have noticed that these motors tend to run alittle cooler compared to the original terminal boards. Has anyone else noticed this?

    Thanks
    Wang

  • #2
    Re: Potential Relay

    It would not surprise me, no sparking or heat generation from the cent. switches. Have you noticed any sweep coast with the westinghouses?? In Vermont I converted all 36 lanes, had 3 I had to change back (sweep only) due to coast, moved b4 I had a chance to follow up on it.

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    • #3
      Re: Potential Relay

      I have no sweep coast with the relays.....and the stators do run cooler with the relays.....when the relay is going bad the stator will overheat and kick the klixon or coast excessively.

      Comment


      • #4
        Re: Potential Relay

        Problem comes in after some time when the relays have arc'd and their contacts finally weld together, just like the old start switches, but not as soon. When this happens, the start winding stays on while the run winding is on, causing gradual overheating due to conflicting resistance.
        They're still the best way to go in my book, but they do not work well at all with solid state contactors (Bowltronics), causing coasting.

        A while back, I posted how I set my machines up. For those who missed it, and for the newer guys:

        Both potential relays are located in the back end control box, with a single 7-conductor cable (couldn't get 6. . .one is a spare) going up the wire duct to the front end. As soon as we get an interlock or other coasting problem, or a no-start situation, just open the panel, swap the relays or replace the suspected one. The bowlers never see you or even know you fixed it. NO down time (well, maybe 20-30 seconds plus the time to get the relay out of stock). Also, NO exposed terminals or holes to drill in the front.

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        • #5
          Re: Potential Relay

          That sounds kewl, we put ours in the front just to the side of the caps. Takes a few more min's, but we can change ours from top.

          My problem in Vermont was with brand new potentials, and I do not believe it was relay or motor related, was just curious. Never had the chance to follow up before I left, but I would guess that there was a bad wire somewhere, or maybe weak caps...

          Dosent matter now...lol, I will never step foot into a (name withheld due to lack of lawyer cash) center again....

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          • #6
            Re: Potential Relay

            Is there someone that is using these relays on 220 Volts(if they excist)?
            So it goes.

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            • #7
              Re: Potential Relay

              Lamp, I would contact Granger, I am sure they have a 220 model available, I will try to remember to look it up tom at work, but we buy ours directly from Granger, and as I understand it, they are basicly washer'dryer relays. I will try to check.

              Paul

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              • #8
                Re: Potential Relay

                Thank you.
                So it goes.

                Comment


                • #9
                  Re: Potential Relay

                  Equip......we have all relays ans Bowltronics ss contractors and I have no problems.......mine are all located in the wireways.

                  Comment


                  • #10
                    Re: Potential Relay

                    King: Just wondering: are your potentials #6X550 (Grainger #)? I was told that it was probably a timing problem, being that the "contactors" are so quick compared to the relays, and that the drop-out time isn't quick enough or too quick. I know there are many variations of the relay (6X549, etc), all of which pull in or drop out at different times. We're talking micro-seconds here. I can't think THAT fast!!

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                    • #11
                      Re: Potential Relay

                      I got mine from Stahl's.

                      Comment


                      • #12
                        Re: Potential Relay

                        Bowl, just for hoots I converted one of the Granger potentials to a Stahls and compared them. If you look close at the side of the Stahls, you can see a faint remainant of a logo. It is GE. Cut all the tabls off (except one on stahls) and they are identical. I have been using them for almost 8 months now with no ill effects.

                        Lampie, I have one question?? Are you on 220 because you have 90's, or is it becasue you live on the wrong side of the planet (LOL...KIDDING)

                        I have found 2 possibilities for you, but I am no electrical expert, so you may want to consult someone about it. When I was researching, I did discover these relays are for changing start to run, (and back) in refirdgerator and airconditioning units, I was close with my theroy.

                        Granger Adjustable potential relay (130 - 390 V) part # 4MG77


                        The standard Potential that I think may work on 220 is 6x553. (222-235 pick up, 90-40 drop out) the problem is that it is 60 Htz.

                        I believe if you are in Europe (which I assume) that you are 50 Htz, so I dont know if it would work. I would bet cash $$ that any electrical suplier would have these, or similar, devices over there (if, in fact, you are in Europe) as they are simple airconditioning/freezer items.

                        Hope this helped, but I have a feeling it didnt...lol

                        good luck.

                        Paul

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                        • #13
                          Re: Potential Relay

                          Originally posted by JimDorsin:
                          Dosent matter now...lol, I will never step foot into a (name withheld due to lack of lawyer cash) center again....
                          <font size="2" face="Verdana, Helvetica, sans-serif">Bowl New England. Sue me for everything I own... and don't spend the entire 50 cents in one place [img]/content/btubb/images/%%GRAEMLIN_URL%%/wink.gif[/img]

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                          • #14
                            Re: Potential Relay

                            lol

                            Comment


                            • #15
                              Re: Potential Relay

                              if you look back to the topic i posted about retro-fitting motors with relays to aid braking, this costs about £2 a machine and has very impressive results, and if you use plug-in type relays, you can change the relay and be up and running again in 2 seconds flat if it starts to creep due to failed contacts
                              Want your old pins collecting anywhere in the UK? email me on jezsmith@aol.com

                              Comment

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