AEGIS SGR Bearing Protection Rings from Electro Static Technology reportedly extend the lives of motors controlled by variable frequency drives (VFDs) by channeling VFD-induced shaft currents safely to ground. Unlike conventional grounding brushes, the SGR is reportedly maintenance-free and works with virtually no friction or wear for the service life of the motor.

The SGR ring can be installed in the field without disconnecting the motor from coupled equipment. A U-shaped mounting plate fits around the motor shaft, simplifying installation of the AEGIS SGR on motors with shaft shoulders, slingers, and other end bell protrusions. The plate covers less than ½-inch of the motor shaft.
www.est-aegis.com.