How to dodge motor damage

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• Minimize the distance from the drive to the motor.
  
  
• If the VFD is run much at a single speed, arcing through the bearings in the same place can deteriorate them. Use insulated bearings or shaft ground bushings.
  
  
• Make sure motors can handle 3.1 times the line voltage at a 0.1 microsecond rise time.
  
  
• In constant-torque applications, at too low a speed, a TEFC motor will overheat. Define your parameters to avoid this.