Shear wiring starter coil voltage
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  1. #1
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    Default Shear wiring starter coil voltage

    We recently bought this Cincinnati shear. It has a 7 1/2 hp motor wired 240v. Currently running off a cord to one of my welder outlets.
    The cover for the starter is gone, and I'd like to install this Square D combination starter disconnect that I have.

    The starter in the enclosure is different than every other one in my shop. There doesn't seem to be a transformer. How do you get power to the 120v coil? Off one of the 3 phase legs? I have a 240v service with a wild leg. I do have a Square D .100kva transformer I could put in the enclosure if I need to.thumbnail-2-.jpgthumbnail.jpgthumbnail-1-.jpg

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    I would suggest the transformer.

    Tom

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    That's what I figured.

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    Is the voltage from one phase to neutral 120v? If so you do not need a transformer.

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    That only applies if you have a neutral present. If it's running off a NEMA 6 you don't have a neutral. Connecting the other side of the primary to ground instead of neutral is not a good idea - if anything goes wrong with the ground, the case of your machine is live.

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