Description
3.3 Design
Synchronous/induction motors 1PH813
24 Operating Instructions, 04/2009, 610.48000.22
3.3.6 Noise emission
When operated in the speed range 0 to 5000 rpm, 1PH813 motors can reach the following
measuring-surface sound-pressure level Lp(A):
Cooling method Measuring-surface sound-pressure level Lp(A)
Self-cooled 70 dB(A) + 3 dB tolerance
Force ventilated 70 dB(A) + 3 dB tolerance
Water-cooled 68 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.
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