A Green Motor Rewind is the rewinding of an induction motor that is intended to preserve its original efficiency. Green practices include tight control of the burn-off process, stator core loss testing and repair, and performance criteria for the windings. Standard rewind practices can result in a decrement in efficiency relative to the original efficiency due to degradation of stator core laminations, splayed stator core teeth, increased winding resistance losses, and increased bearing friction losses. The Green Motors Practices Group certifies service centers as members, and certifies individual rewinds at member service centers when they have been documented to meet the Green Rewind specifications. Eligible motors are low-, and medium-voltage squirrel cage induction motors between 15 and 5,000 HP with undamaged stator cores and rotors.
More information about where data used in this measure came from can be found at the bottom of this page.