Preventing The Recirculation Of Hot Air - ABB ACS580-04 Hardware Manual

46 Generic cabinet planning instructions
1 Air inlet
Arrange the cooling air flow through the components according to the technical data
in the applicable hardware manual. 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 ambient 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. For higher
degrees of protection, or if the air outlet is in the cabinet door, extra fans can be
necessary. 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.

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