Motor Shaft Grounding Rings Reduce Downtime and Repairs At Midwest Paper Mill C ASE STUD Y At a paper mill in the Midwest, every new motor controlled by a variable frequency drive (VFD) is tested, and if shaft voltages are found, the motor must be equipped with an AEGIS® Bearing Protection Ring to divert damaging currents to ground. The plant’s electrical reliability engineer established this money-saving specification after many years o

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