Siemens SINAMICS G120P Hardware Installation Manual page 15

5. Avoid short circuits of the cooling air using air barriers, if necessary
6. Provide an adequate cabinet with sufficient ventilation and suitable air filters.
The power losses and the required air flow of the Power Modules are given in the section
Specifications (Page 44) of this Manual. The maximum power losses of the CU are less than
0.04 kW.
The values are valid for:
● Rated output current
● 50 Hz output frequency
● 4 kHz pulse frequency
If you use Push through units, you should calculate with losses of 0.02 kW inside the
cabinet. Take care that the losses outside the cabinet do not cause overheating of the Power
Modules.
For other components like reactors or filters use the values given by the manufacturer and
calculate the required airflow using the formula given in this section.
Power Module PM230, IP20 / Push through
Hardware Installation Manual, 03/2012, A5E03448282B AA
Figure 3-1 Air barriers for avoiding cooling air short circuits
3.2 Power losses and air cooling requirements
Installing/Mounting
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