Siemens SINAMICS S120 Manual page 133

①
②
Figure 6-6
NOTICE
Component damage caused by condensation
Condensation on the components can result in their failure.
• Select the air circuit and arrangement of the cooling equipment in such a way that no
• If required, an anti-condensation heater must be installed in the cabinet.
If air conditioners are used, the relative air humidity of the expelled air increases as the air in
the air conditioner cools and may exceed the dew point. To avoid condensation, climate
control equipment should be arranged so that cold discharged air is not directly blown onto
SINAMICS components. Using air guidance baffles, ensure that the air is adequately mixed
with the air inside the cabinet. Mixing this cold air with warm cabinet air reduces the relative
air humidity to non-critical values.
Power Units in Booksize C/D-Type Format
Manual, 12/2018, 6SL3097-5AC20-0BP0
Cooling unit
Control cabinet
Examples of cabinet ventilation
condensation can form on the components.
Cabinet design
6.11 Notes on control cabinet cooling
131