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2.4
Derating factors
For installation altitudes more than 2000 m above sea level, reduce the voltage stress of the
motors according to the "Factors to reduce the maximum DC link voltage" table (reciprocal
values from EN 60664-1 Table A. 2).
Table 2- 8
Installation altitude above sea level in m up to
Reducing the DC link voltage reduces the converter output voltage. The operating range in
the M-n diagram is also reduced.
You can find the M-n diagrams in the associated data sheet.
Operation in a vacuum is not permissible due to the low voltage strength and the poor
cooling.
2.5
Selection and ordering data
2.5.1
Order designation
The article number serves as order designation. The article number (MLFB) comprises a
combination of digits and letters. When placing an order, it is sufficient just to specify the
unique Article number. As the range of combinations is extremely large, only selected
version features are shown. Your local Siemens office will support you when determining the
appropriate article numbers for the motor components that you require.
The article number consists of three blocks that are separated by hyphens. The first block
has seven positions and designates the motor type (1FW68) and the air gap radius.
Additional features are coded in the second and third blocks.
Please note that not every theoretical combination is possible.
1FW68 radial segment motors
Configuration Manual, 04/2017, 6SN1197-0AE02-0BP1
Factors to reduce the maximum DC link voltage
2000
3000
4000
5000
6000
7000
8000
Description of the motors
2.4 Derating factors
Factor
1
0.877
0.775
0.656
0.588
0.513
0.444
39
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