Siemens SIMOTICS T-1FW68, Configuration Manual

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Description of the motor
2.4 Derating factors
1FW68 radial segment motors
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Configuration Manual, 08/2021, A5E51132930B AA
Any danger areas encountered during normal operation and when maintaining and
servicing the motor must be identified using clearly visible warning and prohibit signs
(pictograms) in the immediate vicinity of the danger (close to the motor). The associated
texts must be available in the language of the country in which the product is used.
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- 5 Factors to reduce the maximum DC link voltage
Installation altitude above sea level in m up to Factor
2000 1
3000 0.877
4000 0.775
5000 0.656
6000 0.588
7000 0.513
8000 0.444
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 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.