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Motor for GS2

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  • Motor for GS2

    I have a ac motor driven pump. Right now is is a standard 1800 rpm, 1 hp motor. I plan to replace it with a variable speed motor and controller. I have a clickPLC system, so I can provide the motor controller with a PID signal, say 0 - 5 VDC. I am a newbie to pumps and controllers, so the GS2 looks applicable: 115 VAC in, 1/2 to 1 hp needed to drive the pump. So my dumb question is where do I find 3 phase electric motors that are compatible with the GS2 output? Thanks for the help, and I will be happy to answer any questions you may have.

  • #2
    So the Iron Horse motors sold here should work. If I currently have a 1 HP motor, should I spec the same in the 3 phase?


    • #3
      Well, one could get a motor from the same company one gets the GS2 from (i.e. Automation Direct). I've had good results with Marathon "MicroMAX" motors, though an IronHorse is less expensive. While an inverter rated motor is a good idea, if your operational parameters are conservative most any three phase motor in good condition can usually be used (a line reactor between drive and motor might be a good idea)


      • #4
        And just to be sure, I can run single phase 115VAC into the GS2 drive? (GS2-11P0)


        • #5
          without looking, I believe, that if you power the drive from 115 volts, you have to derate the drive, i.e; 1 HP drive may only run a 1/2 HP motor......
          anything is possible with the right sized hammer.....


          • #6
            Nope, the is specifically intended for 110V single phase input, needs no derating

            "Horsepower By Phase: 1hp with 1-phase input"


            • #7
              Thanks, that's what I read. About 4 amps on the 3 phase side....

              The pump actually shouldn't actually run that much load. (Famous last words.)


              • #8
                Look on the documentation of gs2. You’ll find:
                input voltage/ phase config
                ouput voltage/ phase
                output current
                on the motor stamp you should see:
                input voltage
                input current
                ouput power

                picking a motor is just straight forward:
                match drive ouput voltage to motor input voltage
                choose a motor of same or more power rating than the one you need to replace
                make sure motor shaft looks the same ( to allow connecting new motor to your pump)