Derating Data - Siemens SINAMICS S120 Equipment Manual

5.8.9

Derating data

Current derating as a function of the installation altitude and ambient temperature
If the cabinet units are operated at an installation altitude > 2000 m above sea level, the
maximum permissible output current can be calculated using the following table. The
installation altitude and ambient temperature are compensated here. The degree of
protection selected for the cabinet units must also be taken into account.
Table 5- 69 Current derating as a function of ambient temperature (inlet air temperature at the air inlet of the cabinet unit)
and installation altitude for cabinet units with degree of protection IP20/IP21/IP23/IP43
Installation altitude
above sea level in m
0 to 2000
up to 2500
up to 3000
up to 3500
up to 4000
Table 5- 70 Current derating as a function of the ambient temperature (inlet air temperature at the air inlet of the cabinet
unit) and installation altitude for cabinet units with degree of protection IP54
Installation altitude
above sea level in m
0 to 2000
up to 2500
up to 3000
up to 3500
up to 4000
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
20 25
100 %
100 %
100 %
100 % 97.8 %
20 25
100 %
100 %
100 %
100 % 96.7 %
97.8 % 92.7 %
Ambient temperature in °C
30 35
100 %
96.2 %
96.7 % 92.3 %
92.7 % 88.4 %
Ambient temperature in °C
30 35
96.3 %
96.2 % 92.5 %
92.3 % 88.8 %
88.4 % 85.0 %
Cabinet Modules
5.8 Auxiliary Power Supply Modules
40 45
95.0 %
96.3 % 91.4 %
92.5 % 87.9 %
88.8 % 84.3 %
85.0 % 80.8 %
40 45
95.0 % 87.5 %
91.4 % 84.2 %
87.9 % 81.0 %
84.3 % 77.7 %
80.8 % 74.7 %
50
87.0 %
83.7 %
80.5 %
77.3 %
74.0 %
50
80.0 %
77.0 %
74.1 %
71.1 %
68.0 %
231