Installation Instructions

4.3 Power losses and air cooling requirements
Cooling requirements
To protect the components from overheating, the control cabinet requires a cooling air flow,
which depends on the power loss of the individual components.
Formula for calculating the cooling airflow:
airflow [l/s] = power loss [W] * 0.86 / ΔT [K]
● Power loss: Total of the power losses of the individual components.
● Δ T: Permissible temperature rise in the control cabinet
Measures in order to ensure that the components are adequately cooled
● Add the power losses of the
individual components.
– Power Module data:
"Detailed technical data
(Page 64)".
– The Control Unit power loss is
less than 0.04 kW.
– Use the manufacturers data for
components, for example
reactors or filters
● Calculate the air flow required,
using the formula above.
● Ensure that the control cabinet is
appropriately ventilated and
equipped with suitable air filters.
● Ensure that the components
maintain the specified clearances
with respect to one another.
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● Ensure that the components are provided with adequate cooling air through the cooling
openings.
● Use the appropriate air barriers to prevent cooling air short circuits
Power loss for modules in push-through technology (PT Power Modules)
When you use PT Power Modules, the majority of the power loss is dissipated through the
heatsink located outside the control cabinet.
Installing/mounting
4.3 Power losses and air cooling requirements
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 08/2016, A5E34331322B AB 29