Derating Data - Siemens SINAMICS S120 Manual

Cabinet Modules
5.5 Booksize format Motor Modules
5.5.7

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- 29 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 and IP54
Installation altitude
above sea level in m
0 to 1000
up to 1500
up to 2000
up to 2500
up to 3000
up to 3500
up to 4000
Voltage derating as a function of the installation altitude
In addition to current derating, voltage derating must also be considered at installation
altitudes > 2000 m above sea level.
Table 5- 30
186
20 25
92 % 92 %
84 % 84 %
79 % 79 %
75 % 75 %
66 % 66 %
63 % 63 %
Voltage derating as a function of the installation altitude (380 to 480 V 3 AC)
Installation altitude
above sea level in m
0 to 2000
up to 2250
up to 2500
up to 2750
up to 3000
up to 3250
up to 3500
up to 3750
up to 4000
Ambient temperature in °C
30 35
100 %
92 % 92 %
84 % 84 %
79 % 79 %
75 % 75 %
66 % 66 %
63 % 63 %
Rated converter input voltage
380 V 400 V 420 V
100 %
100 %
100 %
100 %
100 %
100 % 98 %
100 % 95 %
96 % 92 %
40 45
86 %
92 % 79 %
84 % 72 %
79 % 68 %
75 % 65 %
66 % 56 %
63 % 54 %
440 V 460 V
100 %
98 %
98 % 94 %
95 % 91 %
97 % 93 % 89 %
93 % 89 % 85 %
91 % 87 % 83 %
87 % 83 % 80 %
Manual, (GH5), 05/2010, A5E03263538A
50
73 %
67 %
61 %
57 %
54 %
48 %
46 %
480 V
96 %
94 %
90 %
88 %
85 %
82 %
79 %
76 %
Cabinet Modules