Power Losses And Air Cooling Requirements - Siemens PM240-2 Hardware Installation Manual

4.2

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:
• Δ T
Measures in order to ensure that the components are adequately cooled
1. Add the power losses of the individual components.
– Power Module data:
– 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
Power Module PM240-2
Hardware Installation Manual, 12/2015, A5E33294624B AD
Total of the power losses of the individual components.
Permissible temperature rise in the electrical cabinet
"Technical data (Page 65)".
4.2 Power losses and air cooling requirements
Installing/mounting
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