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  • Unusual Drum Switch Configuration

    Hello everyone.
    This is my very first post so please bear with me.
    I'm in a process of changing my broken Drum switch which is connected to a Baldor single Phase 1/2 horse power motor. There are 6 wires coming out of the motor.
    My problem is how do connect those wires to a chinese made drum switch?
    Attached file is the drum switch with its configuration.
    How do I attach L1,L2 and T1,T2,T3,T4,T5 & T8 to this drum switch?
    Your help is greatly appreciated.
    Jonathan
    Attached Files

  • #2

    Re: Unusual Drum Switch Configuration

    Re: Unusual Drum Switch Configuration

    Hi, please post a wiring diagram for your motor as well as the voltage you want to run it on and I'll make you a drawing..........Rod.
    Work is the curse of the riding class.

    Comment


    • #3

      Re: Unusual Drum Switch Configuration

      Re: Unusual Drum Switch Configuration

      Originally posted by Rod Sheridan View Post
      Hi, please post a wiring diagram for your motor as well as the voltage you want to run it on and I'll make you a drawing..........Rod.
      Thanks a lot Rod for a very quick response.
      Attached is the motor's wiring diagram. I would like to run it on 230 volts.BaldorL3504wiring.jpg
      Please be aware that I am not very electrical oriented person, so please, if you can make the drawing straightforward as possible, I would really appreciate it.
      Thanks again,
      Jonathan

      Comment


      • #4

        Re: Unusual Drum Switch Configuration

        Re: Unusual Drum Switch Configuration

        it looks to me that for 240 service, the two run windings are put in series by connecting the white and orange. the the run winding lines are blue and yellow. the red and black leads are the start winding

        generally the run winding is hooked to the reversing section of the switch and the start winding to the on/off section

        but that switch only has on/off for one hot lead for 120 service, for 240 service there should be two on/off sections
        my shop is a beaver lodge
        steve, sarnia, ont



        1940's Beaver Jointer

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        • #5

          Re: Unusual Drum Switch Configuration

          Re: Unusual Drum Switch Configuration

          Visio-Drum Switch.pdf

          Hi.'ve attached a drawing for your switch and motor.

          There are a couple of issues

          1) all motors need thermal overload protection. Is your motor marked as thermally protected? The motor wiring diagram indicates an optional thermal protector.

          2) the drum switch has to be rated for 240 volts, single pole.

          There is no requirement to break both lines in a motor starter unless the starter is also the disconnecting means. In your case I'm assuming that you have a plug on the motor.

          Let me know about the switch and overload protection please............Thanks, Rod.
          Work is the curse of the riding class.

          Comment


          • #6

            Re: Unusual Drum Switch Configuration

            Re: Unusual Drum Switch Configuration

            Originally posted by Rod Sheridan View Post
            [ATTACH=CONFIG]44333[/ATTACH]

            Hi.'ve attached a drawing for your switch and motor.

            There are a couple of issues

            1) all motors need thermal overload protection. Is your motor marked as thermally protected? The motor wiring diagram indicates an optional thermal protector.

            2) the drum switch has to be rated for 240 volts, single pole.

            There is no requirement to break both lines in a motor starter unless the starter is also the disconnecting means. In your case I'm assuming that you have a plug on the motor.

            Let me know about the switch and overload protection please............Thanks, Rod.
            rod, im kinda new to this 240 volt stuff, all my oldies are 120 so far
            so is considered safe to just switch one leg of a 240 supply to a motor?, leaving the other "side" still live?
            to me a double pole switch for 240 would be required
            my shop is a beaver lodge
            steve, sarnia, ont



            1940's Beaver Jointer

            Comment


            • #7

              Re: Unusual Drum Switch Configuration

              Re: Unusual Drum Switch Configuration

              Hi Steve, since it's a piece of machinery and the unswitched conductor doesn't leave the machine, you only have to open one line for single phase or two lines for three phase.

              If the drum switch was the disconnecting means, then all lines must be opened, however on cord connected machines, the plug is considered the disconnecting means.

              The issue with contactors and switches is that often they're only rated for 240 volts if you break both lines. This helps extinguish the arc, which was why my question about the switch rating was included.

              Have a Happy New Year Steve, throw some extra nice poplar bark in for those Beavers...............Regards, Rod.
              Work is the curse of the riding class.

              Comment


              • #8

                Re: Unusual Drum Switch Configuration

                Re: Unusual Drum Switch Configuration

                Jonathan

                Did you check the unused terminals (no screws) to see if perhaps this is a 5 pole switch?

                If not, you can still switch both hot lines by rearranging the wiring a bit

                Last edited by APLJaK; 12-31-2011, 03:52 PM.
                APLJaK

                Comment


                • #9

                  Re: Unusual Drum Switch Configuration

                  Re: Unusual Drum Switch Configuration

                  Originally posted by APLJaK View Post
                  Jonathan

                  Did you check the unused terminals (no screws) to see if perhaps this is a 5 pole switch?

                  If not, you can still switch both hot lines by rearranging the wiring a bit

                  Hi APLJaK,

                  I'm not quite sure if it is 5 pole but opening the drum itself, I noticed a very faint diagram that looks like this:



                  Drum Switch.jpg

                  Please excuse the graphic, I never good at it.
                  There is also something written but it's in chinese characters.
                  Thanks again for trying to help me out.
                  Jonathan

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