Siemens SIMOTICS T-1FW3, Configuration Manual

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Description of the motor
2.4 Derating factors
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
29
Note
Unsuitable installation locations
The motors are not suitable for operation
•
in salt-laden or corrosive atmospheres
•
outdoors
The motors are designed for operation in covered areas, such as production facilities.
2.4 Derating factors
Derating for the maximum DC link voltage
At installation altitudes of 2000 m above sea level or higher, the voltage stress on the motors
must be reduced accordingly based on the table below (reciprocal values from EN 60664-1
Table A. 2).
Table 2- 4 Factors for reducing the maximum DC link voltage
Installation altitude above sea level up to [m] Factor
2000 1
3000 0.877
4000 0.775
5000 0.656
6000 0.588
7000 0.513
8000 0.444
As the DC link voltage is reduced, the converter output voltage also decreases. This reduces
the operating range in the torque-speed diagram.
Consider the reduced operating range when engineering your system.
Operation in a vacuum is not permissible because of the low dielectric strength and poor
heat dissipation.
Derating for the static torque
For derating factors for the static torque M
0
as a function of the cooling water inlet
temperature, see the table in Section "Cooling (Page 41)".
Derating for cables
For derating factors for power and signal cables as a function of the ambient temperature,
see the table in Section "Electrical connection (Page 299)".