Mounting - Siemens 1PH728 Series Operating Instructions Manual

Installation / Assembly
The motors are certified for a wide range of installation and operating conditions.
These conditions (e.g. rigid or vibration-isolated foundation design, use of sound-
absorbing elements) have to some extent a very great 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.
3.3

Mounting

Prerequisites
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 with the required strength class (8.8) in accordance with ISO 8898-
1.
Notice
All flange motors must have stable suspension and be supported by means of the
end-shield feet (foot-flange type of construction). When commissioning, make sure
that the vibration values permitted in accordance with DIN ISO 10816 are
observed.
Motors that are mounted with their feet on the wall due to their type of construction
must be fixed in position by means of an adequately dimensioned form closure
(e.g. by pinning or using a wall mounting strip).
3-4
SIEMENS AG - Operating Instructions
Three-phase induction motor 1PH728.