Installing/mounting
4.2 Power losses and air cooling requirements
Power Module PM240-2
Hardware Installation Manual, 12/2015, A5E33294624B AD
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Power losses and air cooling requirements
Cooling requirements
Depending on the power loss of the individual components, the control cabinet will require a
cooling airflow to prevent the components from overheating.
Formula for calculating the cooling airflow:
Power loss:
Total of the power losses of t
he individual components.
Δ T
Permissible temperature rise in the electrical cabinet
Measures in order to ensure that the components are adequately cooled
1. Add the power losses of the individual components.
– Power Module data:
"Technical data (Page 65)".
– The Control Unit power loss is less than 0.04 kW.
– Use the manufacturers data for components, for example reactors or filters
2. Calculate the air flow required, using the formula above.
3. Ensure that the control cabinet is appropriately ventilated and equipped with suitable air
filters.
4. Ensure that the components have the specified clearances with respect to one another.
5. Ensure that the components are provided with adequate cooling air through the cooling
openings.
6. Use the appropriate air barriers to prevent cooling air short circuits
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