About the Author
William Kruger joined ALL-TEST Pro, LLC as the Technical Manager in 2005. Since joining ATP, Bill has traveled the world teaching the Theory and Application of Motor Diagnostics, helping Fortune 500 Companies implement Predictive Maintenance Programs. In 2010 Bill’s proven instructional techniques earned him the new title of Training Technical Manager.
Before joining ALL-TEST Pro, LLC Bill Kruger worked in many different aspects of the Engineering and Maintenance Fields. Bill worked as an Electrician in the US Navy Nuclear Submarine Program. He has completed the Journeyman Electrician Program and started one of the first Predictive Maintenance Programs in the Utility Industry. Bill Kruger holds a Bachelor of Science Degree from San Diego University.
With his combined work in the field as well as with ALL-TEST Pro, Bill has over 40 years of proven experience in the practical engineering and predictive maintenance field.
I think this is wrong calculations.
In my opinion,
1-30%motors become stator fault due to under raining selection wrt temperature class.
2- 5% stator faults due to wrong IP standers by menufecturere (motor sealing)
3- 10% motors bearing broken fault become stator fault.
4-10% dry to not proper protection against wrong loads.
5– 5% motors fail due to any unbalance voltages.