Bearing current remediation options

The vast majority of bearing failures in electric motors and electric motor-driven equipment are due to mechanical and thermal causes. Bearing current in induction motor can result in premature bearing failure. Proper remediation methods depend upon a thorough understanding of the potential current paths in a given installation. Diagrams of current flow paths were presented here to illustrate potential issues. Proper grounding is a key to shunting currents away from paths that flow through motor or driven equipment bearings.