Mounting
4.6 Vibration response
1FK7 G2 synchronous motors
Operating Instructions, 05/2021, A5E50907562B AA
63
4.6 Vibration response
Vibration severity grade
Motors with a keyway are balanced with a half fitted key by the manufacturer. The vibration
response of the system at the location of use is influenced by output elements, any built-on
parts, the alignment, the installation, and external vibrations. This can change the vibration
values of the motor.
The motors conform to vibration severity grade A according to EN 60034-14 (IEC 60034-14).
The specified values refer only to the motor. The installation-dependent system vibration
behavior can increase these values at the motor.
The vibration severity grade is maintained up to the rated speed (n
N).
Figure 4-5 Vibration severity grades
Vibration response
For perfect function and to comply with the motor specification (in particular, the bearing
service life) the vibration values specified in the following table must be observed.
Table 4- 4 Vibration values
Vibration speed vrms according to ISO 10816
Vibration acceleration apeak axial
1)
2
Vibration acceleration apeak radial
1)
2
1) For motors with separately driven fans, the limit value for axial and radial vibration acceleration is
limited to 10 m/s
2
Select the measuring locations according to ISO 10816-1, Section 3.2. The vibration values
must not exceed the specified limits at any measuring location.
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