Mounting - Siemens 1PH728 Operating Instructions Manual

Transport, assembly, and connection
3.2 Assembly
Noise emission
Motors of the 1PH728 series have a measuring surface sound pressure level Lp(A) of
approx. 74 dB(A) in a speed range from 0 through 3000 rpm.
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, note 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 with the rated load.
[ID: 326.01]
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.
Fixing by means of motor feet
If the motor needs to be aligned, position metal shims underneath the feet in order to prevent
the motor from suffering distortion.
The number of shims should be kept as low as possible i.e. stack as few as possible.
Mounting bolts
To securely mount the motor and reliably transfer the drive torque, use motor mounting bolts
(M20) with the required strength class (8.8) in accordance with ISO 898-1.
NOTICE
All flange motors must have stable suspension and be supported by means of the end-
shield feet (foot-flange construction type). When carrying out commissioning, make sure
that the vibration values permitted in accordance with DIN ISO 10816 are maintained.
Motors that are mounted with their feet on the wall due to their construction type must be
fixed in position by means of an adequately dimensioned form closure (e.g. by pinning or
using a wall mounting strip).
[ID: 330.01]
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Siemens AG Operating Instructions 2.02 1PH728
A5E00177602A AD