Siemens SINAMICS G130 Engineering Manual page 242

SINAMICS S120 Cabinet Modules
Engineering Information
Current derating as a function of installation altitude (Cabinet Modules based on booksize units)
Compared with Cabinet Modules based on chassis units, Cabinet Modules based on booksize units have different
derating factors. From an installation altitude of > 1000m above sea level, the corresponding reduction factors for
the maximum permissible output current must be considered (derating). These factors are given in the following
table. As with Cabinet Modules based on chassis units it has to be ensured that the air flow rate for the
corresponding Cabinet Modules given in the tables of technical data is guaranteed. The values already include a
permitted correction between installation altitude and ambient temperature (air temperature at air inlet of the Cabinet
Module).
Installation altitude Current derating
above sea level at an ambient temperature (inlet air temperature) of
m 20 °C
0 ... 1000
... 1500 92 %
... 2000 84 %
... 2500 79 %
... 3000 75 %
... 3500 66 %
... 4000 63 %
Current derating as a function of ambient temperature (temperature of inlet air) and installation altitude
for Cabinet Modules based on Booksize units with degree of protection IP20, IP21, IP23, IP43 and IP54
Voltage derating as a function of the installation altitude (Cabinet Modules based on booksize units)
In addition to current derating, voltage derating as stipulated in the table below is applicable at installation altitudes of
> 1000 m above sea level.
Installation altitude Voltage Derating
above sea level at a rated line supply of
m 380 V
0 ... 2000
... 2250
... 2500
... 2750
... 3000
... 3250
... 3500
... 3750
... 4000 96 %
Voltage derating as a function of installation altitude
Additional derating values (e.g. with increased pulse frequency) can be found in the chapter "SINAMICS S120,
General Information about Built-in and Cabinet Units".
SINAMICS Engineering Manual – May 2008
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© Siemens AG
25 °C 30 °C
100 %
92 % 92 %
84 % 84 %
79 % 79 %
75 % 75 %
66 % 66 %
63 % 63 %
400 V 420 V 440 V
100 %
98 %
95 %
97 % 93 %
98 % 93 % 89 %
95 % 91 % 87 %
92 % 87 % 83 %
35 °C 40 °C
92 % 92 %
84 % 84 %
79 % 79 %
75 % 75 %
66 % 66 %
63 % 63 %
460 V 480 V
96 %
98 % 94 %
94 % 90 %
91 % 88 %
89 % 85 %
85 % 82 %
83 % 79 %
80 % 76 %
45 °C 50 °C
86 % 73 %
79 % 67 %
72 % 61 %
68 % 57 %
65 % 54 %
56 % 48 %
54 % 46 %