Electric motors driven by variable-frequency drives are becoming increasingly common in most industries. The need for proper motor grounding is extremely important in preventing premature bearing failure, which could result in high maintenance costs or worse: facility downtime. The most common technique is a shaft-grounding device mounted to the frame of a motor internally or externally. Baldor Electric Co.’s shaft-grounding brush provides a rugged yet compact design that takes up minimal space. The device is a carbon brush spring-loaded to maintain contact with shafts at all times, whether installed internally or externally.
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