Derating Factors - Siemens SIMOTICS T-1FW3 Configuration Manual

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
Installation altitude above sea level up to [m]
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
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)".
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
Factors for reducing the maximum DC link voltage
2000
3000
4000
5000
6000
7000
8000
as a function of the cooling water inlet
0
Description of the motor
2.4 Derating factors
Factor
1
0.877
0.775
0.656
0.588
0.513
0.444
29