PRODUCT DESCRIPTION
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2.2. Expected lifetime
The expected lifetime is very dependent on the motor winding and bearing temperatures. The lower the
temperature the longer expected lifetime. The insulation system for the motor is class H, which means
that the winding temperature should not exceed 180°C. If the winding temperature is kept below this
limit, the expected lifetime of the insulation system is at least 20 000 hours. The electrical performance
data on the nameplate, see Figure 2, is the continuous operation point (S1). Operating in this point will
not compromise the expected lifetime.
In a duty cycle, the rated torque and power on the rating plate could be exceeded short term (peak torque
and peak power) as long as the winding temperature does not exceed 180°C.
As mentioned in the product description, the motor is equipped with temperature sensors in the stator
winding. In most inverters, it is possible to set a warning limit and a shutdown limit for based on the
winding temperature. To not compromise the expected lifetime of the winding, the values in Table 3 are
recommended.
Temperature measured by Pt100 Action Comment
Warning Warning and/or derating of motor.
Shutdown
Table 3. Recommended temperature limits.
NOTE: The warning and shut down limits are only valid for short term operation. Prolonged
operation at high stator winding temperatures will significantly impact the bearing grease
lifetime.
The expected lifetime for bearings and external seals is not solely temperature dependent and needs to
be evaluated based on the duty cycle. Please contact your local ABB sales office for technical support.
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