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Transport, assembly, and connection
3.2 Assembly
Noise emission
Motors of the 1PL622. series have a measuring surface sound pressure level Lp(A) of
approx. 76 dB(A) + 3 dB (tolerance) in a speed range from 0 through 2000 rpm.
Where the ventilation direction is from the NDE to the DE, the motors in this speed range
have a measuring surface sound pressure level Lp(A) of 74 dB(A) + 3 dB (tolerance).
The motors are certified for a wide range of installation and operating conditions. In some
cases, these conditions (e.g. rigid or vibration-isolated foundation design, use of sound-
absorbing elements) can have a significant influence on noise emissions.
When evaluating the noise levels at the workplaces of the system operators, consider the
fact that the A-weighted sound pressure level (measured in accordance with DIN EN 21680
Tl.1) of 70 dB(A) is exceeded when the three-phase motors are operated at nominal load.
[ID: 395.01]
3.2.2
Mounting
Requirements
In order to ensure smooth, vibration-free motor operation, a stable foundation design is
required, the motor must be precisely aligned, and the components that are to be mounted
on the shaft end must be correctly balanced.
Removing the cover sheets
Cover sheets are attached by means of the screw positions on the motor feet.
The cover sheets (1) have to be removed before mounting the motor
Figure 3-1
CAUTION
The cover sheets ensure the cooling of the motor.
Please make sure that the cover sheets are always screwed back onto the motor after
mounting the motor via the motor feet.
28
(1) Cover sheet (detailed view)
Siemens AG Operating Instructions 2.02 1PL622
A5E00264365A
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