Testimonial From a Large NW University:
“We have 1000s of motors and VFDs on [our] campus and are constantly fighting the effects of motor bearing fluting and subsequent failures from stray shaft voltages. One of our buildings that was commissioned in 2005 contains approximately 20 pieces of original VFD driven motors equipped with the SGS CR series shaft ground[ing]. Since the commissioning in 2005 we have not had one bearing failure due to fluting. I believe this is a testament to the good design of the SGS CR shaft ground. Comparatively, in many of our newer buildings we have several types of shaft grounding, grounding/bonding straps, and electrical chokes installed on VFDs and motors that are claimed to inhibit bearing fluting. The reliability has been sporadic and in many instances poor with these compared to the SGS CR shaft ground[ing] in our 2005 building. This is a great example of a comparative long-term test of what works and what doesn’t.”
-Jarrett R.