Preventive maintenance functions to keep machines, assembly lines, and other plant operations running with as little downtime as possible. Preventive maintenance must be performed while the equipment is not operating, and normally occurs during a routine scheduled downtime.
Maintenance programs help prevent the emergence of problems that may interrupt critical production periods. A well maintained motor with a suitable application can have an extremely long service life. Properly selected and installed motors are capable of operation for many years with a reasonably small amount of maintenance.
Insulation and bearing failures are the two most common causes of downtime, though each may be eradicated with only minimal maintenance.
A scheduled routine of service and inspection is the key to minimizing system failures. Routine inspection and service may often be performed without disconnection or disassembly of the motor.
The optimal time-frame for routine service varies widely among application types, and depends upon a number of factors. These include the application's running hours, frequency of starting, amount of plugging and reversal, operating load with respect to rated load, operating environment, and the priority of the equipment in normal plant operation.
Written records of the date, inspected items, and services performed are vital to the effectiveness of any routine maintenance program. Such records specify particular problems in each application so that they are easily identified and addressed.
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