Siemens 1FT7 - Vibration Response Grades

Mounting
5.3 Vibration response
1FT7 synchronous motors
Operating Instructions, 04/2010, 610.40075.40b
27
5.3 Vibration response
Motors with a keyway are balanced with a half feather 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. As a result, the motor's
vibration values may change.
The motors conform to vibration severity grade A in accordance with EN 60034-14
(IEC 60034-14).
The values indicated refer only to the motor. These values can be increased at the motor
due to the overall vibration characteristics of the complete system after the drive has been
installed.
The vibration complies with the severity grade up to rated speed (nN).
Standard: Vibration severity grade A
Option: Vibration severity grade R (compliance with vibration severity grades A and R up
to n
N
)
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Figure 5-2 Vibration severity grades