Motors-D81.1-complete-English-06-2020

© Siemens 2020
■ Overview
The noise is measured in accordance with EN ISO 1680 in a
dead room. It is specified as A-weighted enveloping surface
sound pressure level L pfA in dB (A).
This value is the spatial average value of the sound pressure levels
measured at the measuring surface. The measuring surface
is a cube 1 m away from the surface of the motor. The sound
power level is also specified as L WA in dB (A).
The specified values are valid at 50 Hz and rated power (see the
selection and ordering data). The tolerance is +3 dB. Noise values
for motors in converter operation on request.
To reduce noise levels, 2-pole motors from frame size 132 S to
frame size 355 and higher can optionally be equipped with a unidirectional
axial-flow fan.
For frame sizes 400 and 450, the axial-flow fan is standard.
The values are listed in the table "Low-noise version" below.
Clockwise rotation:
Order code F77
Counterclockwise rotation:
Order code F78
Second shaft extension and/or mountings (mounting of brake,
separately driven fan or encoder) not possible except for
1MB.553 motors.
Low-noise version
Motor series Frame size 2-pole motors
L pfA
L WA
dB (A)
dB (A)
1LE1 1)
132
60
72
1MB1 1) 160
60
72
1LE10, 1LE15/6, 180
1MB15/6 2) 200
1LE15/6,
1MB15/6 2) 225
250
280
315
1LE5, 1MB5 315
355
400
450
1MB555 315
355
63
64
72
73
72
76
78.9
79.2
74
75
73.5
79.6
76
77
86
87
85
90
93.6
94
90
91
88.3
94.9
Introduction
Mechanical version
Noise levels for line operation
1
1) With the exception of 1LE1 and 1MB1 motors with option F90 – version
"Forced-air cooled motors without external fan and fan cover".
2) 1MB15/6 also applies to 1MB154, 1MB164, and 1MB155.
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