Power Losses And Air Cooling Requirements - Siemens sinamics g120 Hardware Installation Manual

Installing/mounting

3.2 Power losses and air cooling requirements

3.2 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.
– For the Power Module, apply the data in Section "Specific technical data (Page 62)".
– The power loss of the CU 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
18
Total of the power losses of the individual components.
Permissible temperature rise in the electrical cabinet
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 06/2014, A5E34331322B AA