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  • Users: Keith53
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  1. Keith53

    Motor controllers tripping, panel doors must be left open

    Hello, A 480 volt, 3 phase motor control center for one of my chillers experiences frequent tripping on 3 of the starter controllers if the panel doors are shut. Our Chief Electrician's answer to this problem has been to prop the panel doors open and direct a large fan on the panels. This...

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