ABB ACS880 P940 Series - Minimum air inlet and outlet grating sizes

Roof air flow viewed from top:
Minimum air inlet and outlet grating sizes
Make sure that the air inlet and outlets are large enough to allow sufficient air flow in and
out of the cabinet. This is critical for the correct cooling of the drive module. See the minimum
grating sizes below.
Minimum effective area of cabinet air
outlet (cm
2
)
Minimum effective area of cabinet air in-
let (cm
2
)
Frame size
IP54IP22IP54IP22
550350250175R1
700450350225R2
900550450275R3
1100700550350R4
1250800650400R5
1500950750475R6
200013001100650R7
3200200016001000R8
4800300024001500R9
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:
• gratings that guide air flow at the air inlet and outlet
• air inlet and outlet at different sides of the cabinet
• cool air inlet in the lower part of the front door, and an extra exhaust fan on the roof of
the cabinet.
Prevent hot air circulation inside the cabinet with, for example, leak-proof air baffles. No
gaskets are usually required.
Guidelines for planning the cabinet installation 17