Mechanic Falls, Maine-based Electro Static Technology has introduced AEGIS SGR bearing protection rings, which are designed to extend the lives of motors controlled by variable frequency drives (VFDs).
The AEGIS SGR shaft-grounding ring channels harmful VFD-induced shaft currents safely to ground. Unlike conventional grounding brushes, the SGR is maintenance-free and works with virtually no friction or wear for the service life of the motor, according to the company.
Because it comes in halves, 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 a half-inch of the motor shaft.
Split-ring kits are usually ordered by motor frame size. Standard kits fit NEMA-frame motors with shaft diameters from 0.625 inches to 3.375 inches and IEC-frame motors with shaft diameters from 19 mm to 95 mm. Custom kits are also available.
For more information, visit est-aegis.com.
SOURCE: Electro Static Technology