AC motor cut off switch

Discussion in 'Technical Repair' started by Dustinsims5, Aug 11, 2016.

  1. Dustinsims5

    Thread Starter New Member

    Aug 11, 2016
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    0
    The motor came with a wired in cut off switch for when the motor is pulling wire in. However I'm trying to wire the motor to wear the cut off switch doesn't allow the motor to let out. The motor is a 1300 pound electric hoist. Can't get the motor to be able to pull cable in while not allowing the motor to let cable out (when the normally closed switch is open). The original wiring had the switch wired in parallel with the capacitors.
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
    Usually on these type of hoist there is a brake that does not allow the drum to turn in the OFF position, are you rewireing this?
    Max.
     
  3. Dustinsims5

    Thread Starter New Member

    Aug 11, 2016
    2
    0
    The brake has been removed. The hoist is not being used in the typical sense that it is designed for. Instead it's being used to lower a bridge down. When the bridge get to the bottom there is a normally closed switch that the bridge presses and opens. I want to re wire the motor so that the switch will stop the motor at this point to prevent the cable from getting loose and therefore tangled.
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
    Then you need something like a limit switch at the bottom in series with the down relay or contactor coil.
    Max.
     
    Last edited: Aug 13, 2016
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