Siemens SINAMICS S120 Configuration Manual page 45

Note
If the motor is operated at speeds between n
and standstill intervals is required in order to reliably guarantee that the grease is well
distributed in the bearings.
1PH4 Induction Motors
Configuration Manual, (APH4S), 08/2008, 6SN1197-0AD64-0BP1
Mechanical properties of the motors
3.3 Bearing design and service life
and n , a speed duty cycle with low speeds
s1 max
45