Siemens SINAMICS S120 Combi User Manual page 262

Cabinet design and EMC
13.9 Note on control cabinet cooling
Note
If the components are installed in a sealed cabinet, an internal air cooling system must be
installed to circulate the air and prevent hot spots. It is best to install the fan above the
components to optimize the air flow (suction).
Figure 13-6 Examples of cabinet ventilation
CAUTION
The air guidance and arrangement of the cooling equipment must be chosen in such a way
that no condensation can form on the components. If necessary, cabinet enclosure heating
may have to be installed.
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SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3