Siemens Sinamics S120 Manual page 773

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Figure 12-39 Examples of cabinet ventilation
NOTICE
Damage to the component through 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. If the relative humidity of the air
entering the SINAMICS components is over 80% for an extended period of time, it can be
assumed that the insulation of the components will fail as a result of electrochemical
reactions (see System overview (Page 33)). Using air baffle plates, for example, you must
ensure that the cold air expelled from the air conditioner mixes with warm air in the cabinet
before it enters the components. This reduces the relative air humidity to uncritical values.
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
Cooling unit
Control cabinet
condensation can form on the components.
Cabinet design and EMC Booksize
12.12 Notes on electrical cabinet cooling
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