Mechanical properties
3.10 Noise emission
1FK2 synchronous motors for SINAMICS S120
Configuration Manual, 06/2019, A5E46927724B AB
41
When operated in the speed range 0 to rated speed, 1FK2 motors can reach the following
measuring surface sound pressure level
L
p
:
Table 3- 6 Sound pressure level
Measuring surface sound pressure level
L
p
Naturally cooled 1FK2❑03
55 dB(A) + 3 dB tolerance
1FK2❑05
1FK2❑06
65 dB(A) + 3 dB tolerance
1FK2❑08
70 dB(A) + 3 dB tolerance
The motors are certified for a wide range of installation and operating conditions. These
conditions such as rigid or vibration-isolated foundation design influence noise emission,
sometimes significantly.
Motor bearings are wearing parts. Their lifetime depends on various parameters including
rotation speed, load cycle, temperature, etc.
At medium loads, the motor bearings last approximately 25000 h.
The procedure for replacing the motor bearing depends on the size of the motor.
For 1FK2❑03 ... 1FK2❑05 motors, it is not possible to replace the motor bearings. Replace
these motors in their entirety.
Replacement of the motor bearings is only intended as from 1FK2❑06.
Especially favorable ambient conditions, such as low average speed, low radial force
(transverse force) and vibration load can prolong the interval until motor replacement.
Note
Premature bearing and motor replacement
Harsh operating conditions, e.g. continuous operation at n
max
, high vibration/shock loads,
frequent reversing duty reduce the bearing or motor replacement interval by up to 50%.
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