Derating Factors - Siemens SIMOTICS S-1FG1 Operating Instructions Manual

3.2

Derating factors

All data refer to an ambient temperature of 40 °C and an installation altitude up to 1000 m above
sea level. Under conditions other than those specified (ambient temperature > 40 °C or
installation altitude > 1000 m above sea level), the permissible torques/powers must be
determined using the factors shown in the following table.
Ambient temperatures and installation altitudes are rounded off to 5 °C or 500 m respectively.
Table 3-2
Installation altitude
above sea level in m
The factors refer to the static torque of the motor M
curve in parallel depending on the result of the factors applied.
At installation altitudes of 2000 m above sea level or higher, the voltage stress on the motors
must be reduced accordingly based on the "Factors for reducing the maximum DC-link
voltage" table (reciprocal values from EN 60664-1 Table A. 2).
Table 3-3
Installation altitude up to m above mean sea
As the DC-link voltage is reduced, the converter output voltage also decreases.
Operation in a vacuum is not permissible because of the low dielectric strength and poor
heat dissipation.
SIMOTICS S-1FG1 servo geared motor
Operating Instructions, 12/2022, A5E47360747B/RS-AC
Power derating factors depending on the installation altitude and the ambient
temperature
< 30
1000 1.07
1500 1.04
2000 1.00
2500 0.96
3000 0.92
3500 0.88
4000 0.82
Factors for reducing the maximum DC-link voltage
level
2000
3000
4000
5000
6000
7000
8000
Ambient temperature in °C
30 ... 40 45
1.00 0.96
0.97 0.93
0.94 0.90
0.90 0.86
0.86 0.82
0.82 0.79
0.77 0.74
. You must shift the S1 characteristic
0.M
Description
3.2 Derating factors
50 55
0.92 0.87
0.89 0.84
0.86 0.82
0.83 0.78
0.79 0.75
0.75 0.71
0.71 0.67
Factor
1
0.877
0.775
0.656
0.588
0.513
0.444
33