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Thread: NSI Contact re: tripping pumps/rakes

  1. #1
    Join Date
    Mar 2019
    Location
    Decatur, GA, USA
    Posts
    2

    NSI Contact re: tripping pumps/rakes

    Hi All,

    We're running a 30bbl NSI brewhouse. Recently we've had problems with the rakes and lauter pumps pulling too many amps and tripping out. We're out of ideas, as is our electrician. Anyone have a contact from NSI that may be able to help? Anyone have any recommendations?

    Thanks.

  2. #2
    Join Date
    May 2012
    Location
    Livermore, CA
    Posts
    641
    Probably a short in a winding, motors dont just run within spec and stop suddenly. Its also possible that your VFD or breakers are failing. Good idea to reach out to NSI, but probably just as good to go directly to the motor manufacturer and get the specs for the windings on your motor. You can test each one for its resistance, if there is a short or problem somewhere, it will be apparent.

  3. #3
    Join Date
    Mar 2003
    Location
    Nashville
    Posts
    857
    Hmm. Several things pulling too many amps all of a sudden? Sounds like a low voltage condition, or losing one leg of a three-phase system. Has your electrician checked the voltage to that panel?


    Quote Originally Posted by 3TGA View Post
    Hi All,

    We're running a 30bbl NSI brewhouse. Recently we've had problems with the rakes and lauter pumps pulling too many amps and tripping out. We're out of ideas, as is our electrician. Anyone have a contact from NSI that may be able to help? Anyone have any recommendations?

    Thanks.
    Linus Hall
    Yazoo Brewing
    Nashville, TN
    [url]www.yazoobrew.com[/url]

  4. #4
    Join Date
    Jun 2018
    Location
    Charlottetown, PE, Canada
    Posts
    1
    Hey, Matt here from DME Process Systems. I can get you in contact with someone to help you out with your NSI gear.

    Fire me an email macleodm@dme.ca with you contact details.

    Cheers!

  5. #5
    Join Date
    Nov 2009
    Location
    Moab, Utah
    Posts
    551

    Troubleshooting Tek

    Quote Originally Posted by 3TGA View Post
    Hi All,

    We're running a 30bbl NSI brewhouse. Recently we've had problems with the rakes and lauter pumps pulling too many amps and tripping out. We're out of ideas, as is our electrician. Anyone have a contact from NSI that may be able to help? Anyone have any recommendations?

    Thanks.
    When you say " pulling too many amps " I am assuming that you have taken an actual current reading to correlate with whatever safety is taking the system down on apparent overload fault. When working on this kind of problem, it helps to try and break it down into smaller subsystems when possible. You are referring to 2 motor loads.
    The first thing I would do is check all terminations everywhere they land on those circuits and tighten everything up. You need to go all the way to the motor terminals. Then run the system dry and take current readings on all 3 phases and compare that to the rated load. If your VFD is thowing a fault code posting that can sometimes be helpful. WE are assuming there is no mechanical binding or any other change than when the system was formerly running ok. VFDs can present problems that are quite different and unexpected. There are some brands that are in fact so unreliable, I will not longer consider using them. You are always better off with the better names in that game.
    Warren Turner
    Industrial Engineering Technician
    HVACR-Electrical Systems Specialist
    Moab Brewery
    " No Cell Phone Zone."

  6. #6
    Join Date
    Jan 2003
    Location
    Palau
    Posts
    2,004

    Also check your overload relays...

    As previously stated, you need to accurately measure current. Then compare overload relays to nameplate data. If VFD, then review programming. It could very well be windings in the motor, but let's rule out simple fixes first.
    Phillip Kelm--Palau Brewing Company Manager--

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