Preventing The Recirculation Of Hot Air - ABB ACS880-34 Series Hardware Manual

46 Generic cabinet planning instructions
Note: Use an extra exhaust fan if the air outlet is on the cabinet door.
1 Air inlet
Arrange the cooling air flow through the components according to the technical data. See
the specifications for:
• cooling air flow
Note: The values stated for each component apply to continuous nominal load. If the
load is cyclic or less than nominal, less cooling air is required.
• allowed surrounding air temperature and temperature rise inside the cabinet
• allowed pressure drop over the cabinet that the cooling fan can overcome
• air inlet and outlet sizes required for cooling and recommended filter material (if used).
Note: The heat dissipated by cables and other additional equipment must also be ventilated.
The internal cooling fans of the converter modules and filters are usually sufficient to keep
the component temperatures low enough in IP20 and IP42 cabinets. Additional fans are
present in the example designs as needed. If you install additional heat-generating
components to the cabinet, make sure to upgrade the cooling system accordingly.
In IP54 cabinets, thick filter mats are used to prevent water splashes from entering the
cabinet. This requires the installation of additional cooling equipment, such as a hot air
exhaust fan.
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Preventing the recirculation of hot air

Prevent hot air circulation outside the cabinet by leading the outgoing hot air away from the
area where the inlet air to the cabinet is taken. Possible solutions are listed below:
2 Air outlet