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  1. Smitty771

    Chasing Down Motor Whine

    This motor has a terrible, high-pitched whine when energized, and I'm trying to figure out the cause and eliminate it, if possible. Manufactured by Diehl Rewound for only 220v previous to my acquisition Nameplate info (220v): 2 HP, SF 1.15, RPM 860, FLA 7.8, 3 phase It will be driven by a VFD...

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