A new plant engineer recently hired you to oversee electrical maintenance. She told you the motor failure rates here seems high compared to the last three plants she worked at.
The plant has dozens of 2 hp and fractional horsepower motors; these almost never fail. But it seems the plant is replacing a 10 hp, 20 hp, or 50 hp motor just about every week.
A sample motor maintenance PM procedure has the technician conducting vibration analysis, checking for voltage imbalance,