Teco Installation and Maintenance Manual
TEFC Squirrel Cage Induction Motors
Teco Electric and Machinery Company
Manual Number: IOM ~ TEFC Rev.01
Chapter 6: PERIODIC MAINTENANCE
6.1. REGULAR INSPECTION & MAINTENANCE.
6.1.1. Major points in regular inspection and maintenance:
a. Routine inspection and maintenance are usually performed by operators
with the sense of touch, sight, smell and simple meters. But it is difficult to
detect trouble such as insulation deterioration etc. unless the motor is
stopped and checked.
b. Replacement of worn-out parts will increase longevity and prevent
breakdown.
c. Regular inspection and maintenance is important in preventing breakdown
and lengthening service life.
c. Owing to the varied uses and environments motors are placed in, it is
difficult to set periods for regular inspection and maintenance. However, it
has to be performed at least once every 6 months. Generally, the inspection
time is determined by the following factors:
High temperatures may arise under operating conditions on the motor
surfaces, so that touching should be prevented or avoided.
Keep away from moving and live parts.
Unless deemed necessary, do not remove guards whilst assessing the
motor.
Some testing, such as insulation resistance, usually requires the motor
to be fully stopped and isolated from any power supply/supplies.
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