Derating Factors - Siemens Simotics T-1FW6 Configuration Manual

Description of the motor

2.4 Derating factors

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
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.
40
Factors to reduce the maximum DC link voltage
2000
3000
4000
5000
6000
7000
8000
Factor
1
0.877
0.775
0.656
0.588
0.513
0.444
1FW6 external rotor built-in torque motors
Configuration Manual, 12/2020, A5E50516483B AA