Teco Installation and Maintenance Manual
TEFC Squirrel Cage Induction Motors
Teco Electric and Machinery Company
Manual Number: IOM ~ TEFC Rev.01
16
3.9.5.
Where specified motors may be equipped with internal space heaters (check
for nameplate), to prevent the ingress of moisture into the motor insulation
system whilst motor is idle.
The incoming supply to the heaters should be in accordance with the details
contained on the heater nameplate.
The heater circuit should be inter-locked with the motor starter so as to de-
energise heaters when the motor is running.
Thermistors and/or RTD’s should not be meggered or tested at a
voltage above 2.5Volts.
Anti Condensation Heaters may be LIVE when the motor is switched
off. Isolate supply at all times before working on the motor.
Should the motor thermal protection circuit trip indicating over
temperature the cause/s should be thoroughly investigated before a
restart is attempted.
Failure to do so may lead to permanent damage or failure of the motor.
