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Mechanical properties
3.11 Noise emission
3.11
Noise emission
When operated in the speed range 0 to rated speed, 1FT7 motors can reach the following
measuring-surface sound pressure level Lp(A):
Table 3- 18
Cooling method
Naturally cooled
Force-ventilated
Water-cooled
Take into account that the installation and operating conditions, such as rigid or vibration-
isolated foundation structure, influence the noise emission.
3.12
Bearing change interval
The bearings are subject to wear and must be replaced after a defined number of operating
hours.
For average load levels, the bearings must be replaced after approx. 25,000 hours.
Bearing replacement intervals can be extended if the motor is operated under favorable
conditions, e.g. low average speeds, low radial forces (cantilever forces), vibration load.
Note
Harsh operating conditions
If the motor is subject to harsh operating conditions (e.g. continuous operation at n
vibration/shock loads, frequent reversing duty etc.), the bearing replacement intervals t
can decrease by up to 50%.
64
Sound pressure level
Shaft height
1FT703 to 1FT706
1FT708 to 1FT713
1FT7117
1FT706 to 1FT713
1FT7117
1FT706
1FT708 to 1FT710
Measuring-surface sound pressure level
Lp(A)
65 dB(A) + 3 dB tolerance
70 dB(A) + 3 dB tolerance
≤ 80 dB(A)
73 dB(A) + 3 dB tolerance
≤ 80 dB(A)
65 dB(A) + 3 dB tolerance
70 dB(A) + 3 dB tolerance
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
, high
max
LW
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