Siemens SINAMICS G150, Operating Manual

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11/03 Technical Data
SINAMICS G150
Operating Manual
12-3
12.2.1 Derating Data
Current Derating as a Function of the Site Altitude and Ambient Temperature
If the cabinet units are operated at a site altitude >2000 m above sea level, the
maximum permissible output current can be calculated using the following tables.
The site altitude and ambient temperature are compensated here. The degree of
protection selected for the cabinet units must also be taken into account.
Table 12-2 Current derating as a function of the ambient temperature and site altitude for cabinet units
with degree of protection IP20 / IP21 and IP23
Ambient temperature in °C Site altitude
above sea level in
m
20 25 30 35 40 45 50
0 to 2000 95.0% 90.0%
Up to 2500 100% 96.3% 91.4% 86.6%
Up to 3000 96.2% 92.5% 87.9% 83.3%
Up to 3500 96.7% 92.3% 88.8% 84.3% 79.9%
Up to 4000 97.8% 92.7% 88.4% 85.0% 80.8% 76.5%
Table 12-3 Current derating as a function of the ambient temperature and site altitude for cabinet units
with degree of protection IP54
Ambient temperature in °C Site altitude
above sea level in
m
20 25 30 35 40 45 50
0 to 2000 98.0% 93.0% 90.0% 85.0% 81.0%
Up to 2500 100% 99.0% 94.0% 90.0% 86.0% 82.0% 77.0%
Up to 3000 95.0% 90.0% 86.0% 83.0% 79.0% 74.0%
Up to 3500 96.0% 91.0% 87.0% 83.0% 80.0% 75.0% 71.0%
Up to 4000 92.0% 87.0% 83.0% 79.0% 76.0% 72.0% 68.0%