Single phase motor to a reversing contactor

Discussion in 'The Projects Forum' started by carlisleworks, Jun 10, 2015.

  1. carlisleworks

    Thread Starter New Member

    Jun 9, 2015
    3
    0
    I am trying to wire a single phase motor to a reversing contactor. the incoming power is 115VAC, my control circut is 24VAC. i understand the control part of it but what im trying to figure out is how to wire the motor to the contactor so as to reverse direction of the motor. the motor has 6 leads. a picture is attached. i do know that T5 and T8 need to swap to reverse direction, but im lost as to how to tie it into the contactor. please help guys

    baldor super E.png

    Capture2.JPG
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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  3. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,590
    2,471
    You could try the below diagram:

    (NOTE1: wire colors shown, are only shown for clarity. They do NOT reflect actual wire colors in the motor. Pay attention to terminal NUMBERS only)

    (NOTE2: This wiring scheme leaves voltage on the motor windings always. This is not really kosher, but given your contactors have NC contacts, it's the only option I see for what you have on hand.)


    reversing2.png

    You really should get new contactors that have Normally Open (NO) aux contacts and wire it properly so that all lines are interrupted, like this:

    reversing.png


    P.S. the wiring diagram for your motor is found here:
    https://www.baldorvip.com/servlet/productInfoPacket/VL1304.pdf
     
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  4. carlisleworks

    Thread Starter New Member

    Jun 9, 2015
    3
    0
    That looks great! But how does this wiring switch t5 and t8? I dont see it?
     
  5. carlisleworks

    Thread Starter New Member

    Jun 9, 2015
    3
    0
    That looks great! But how does this wiring switch t5 and t8? I dont see it?
     
  6. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,590
    2,471
    I don't know how to tell you how to see something when it's already right there drawn out.
    "look again," maybe?
    "trace out each wire?"
    </sarcasm>

    Try this (in the first diagram; black is neutral (N) and line voltage (L) is blue :

    Follow T5 (purple wire) upwards through the left contactor. - see it goes to N, which is connected to 1 & 3.
    Follow T8 (orange wire) upwards through the left contactor. - see it goes to L, which goes back down through the contactor and is connected to 2 & 4.

    so when the left contactor actuates, N connects to 1, 3, and 5 and L connects to 2, 4, and 8.


    Follow T5 (purple wire) upwards through the right contactor. - see it goes to L, which goes back down through the contactor and is connected to 2 & 4.
    Follow T8 (orange wire) upwards through the right contactor. - see it goes to N, which is connected to 1 & 3.

    so when the right contactor actuates, N connects to 1, 3, and 8 and L connects to 2, 4, and 5.

    Left: L = 2,4,8 N = 1,3,5
    Right: L = 2,4,5 N = 1,3,8

    See the switch now?
     
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