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Thread: Hello! New Startup... 3 phase questions inside

  1. #1
    Join Date
    Mar 2018
    Posts
    1

    Hello! New Startup... 3 phase questions inside

    Hello, I'm Joe, a plastics engineer that is about to buy an injection molding machine to start a small business out of my barn.

    After speaking to the electrical company I found out that my only two options for 3 phase service are either 120/208 or 277/480.



    The Injection machine (that I'm looking at buying because its a great price) has an electrical cabinet name plate on it that states the following...

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    Input Drive: 3PH. 220V. 52A. 60Hz
    Input Process Heat: 3PH. 220V. 11A. 60Hz
    Interrupting Capacity 10,000 AMPS



    The injection machine motor has a name plate on it that states the following...

    Click image for larger version. 

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    HP: 20.0
    Type: TEPC
    RPM: 1760
    V: 230/460
    A: 46/23
    F.S: 1.15
    Code: G
    Rating Service: CONT
    Design: B


    Would this machine work on either a 120/208 or 277/480 3 phase service?

    If not, what would it take to get proper voltage power, given my options?
    I've read a little bit about boost transformers and step down transformers, but would that be ok for this injection molding machine? Would it be better to find a different IMM that can run on 120/208 or 277/480?

    I really appreciate anyone that can help point me in the right direction just for planning purposes.

    I'm going to hire an industrial electrical engineer to do the wiring install, so when all is said and done I'm sure everything will be alright.

    Would really just like to know what my best options are going forward with all this.

    Thanks,
    Joe

  2. #2
    Join Date
    Feb 2018
    Posts
    23

    Re: Hello! New Startup... 3 phase questions inside

    I'm not an electrician but I am on a 208 3Y service.
    My 220V presses run on 208 without issues. Less than a 10% differential.
    My 240V presses required a "buck & boost" transformer because it greater than a 10% differential.
    230V is right on the edge .... I would recommend a buck & boost.
    Check input voltage with a good digital meter.

  3. #3
    Join Date
    Feb 2016
    Location
    San Francisco Bay Area, CA
    Posts
    199

    Re: Hello! New Startup... 3 phase questions inside

    I think the machine will work on either one depending how you wire it (in series or in parallel).

    The Input Process Heat I believe are the barrel heats.

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