Noise Emission; Alignment And Fastening - Siemens SIMOTICS SD Operating Instructions Manual

5.1.7

Noise emission

Hearing damage when operating three-phase motors
If you exceed the permissible sound pressure level, hearing damage can occur when
operating three-phase motors at their rated power.
Observe the maximum permissible sound pressure level according to the ISO 1680
standard. The maximum permissible sound pressure level is 70 dB (A).
5.2

Alignment and fastening

When aligning and mounting, please observe the following:
● Uniform mounting surface
● Mounting feet and flanges are securely fixed.
● Precise alignment for a direct coupling
● Mounting surfaces must be clean
● Repair any damage to the paint, this must be done immediately and correctly.
● Remove any anti-corrosion protection using white spirit.
● Avoid installation-related resonances with the rotating frequency and twice the line
● Listen for unusual noises when turning the rotor manually.
● Check the direction of rotation with the machine decoupled.
● Avoid rigid couplings.
Measures
The following measures are required in order to compensate any radial offset at the coupling
and to horizontally adjust the electrical machine with respect to the driven load:
● Vertical positioning.
● Horizontal positioning
● When positioning the motor, ensure that a uniform axial gap is maintained around the
● Smooth running
Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000
CAUTION
frequency.
When vertically positioning the machine, place thin metal shins under the mounting feet in
order to avoid tensioning and deforming the motor. The number of shims should be kept
as low as possible i.e. only stack a few shims.
To position the machine horizontally, shift it sideways on the foundation and ensure that
the axial position is maintained (angularity error).
coupling.
Stable, vibration-free design of the foundations in accordance with DIN 4024 and precise
Assembly
5.2 Alignment and fastening
37