Pic - 100HP Motor Failure

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eric9822

Senior Member
Location
Camarillo, CA
Occupation
Electrical and Instrumentation Tech
100HP 3600RPM motor with a belt driven load that ran for about a week with little or no lubrication in the bearings.

DSCF0009.jpg
 

zog

Senior Member
Location
Charlotte, NC
To me it looks like a case of the OCPD set improperly. If set right you should never get motor damage. I bet the breaker tripped at some point from the increased current drawn by the increased friction of the bearings drying out and the electician just turned up the trip setting allowing for the motor to run to failure. Classic case of improper device settings and/or unqualified personel adjusting OCPD's.
 
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