Table 10: The necessary quantity of cooling air
Enclosure
size
The quantity of
cooling air [m
3
/h]
The quantity of
cooling air [CFM]
The surface area of
the air intake holes
[cm
2
] *
The surface area of
the air intake holes
[in
2
] *
MR8 335 197 150 23.25
MR9 620 365 300 46.50
MR10 1400 824 600 93.00
MR12 2 x 1400 2 x 824 2 x 600 2 x 93.00
* = The surface area is the total area of the openings, not the surface area of, for example, a
grill.
This quantity of cooling air is sufficient for the AC drive. If you have other devices that cause
power losses inside the cabinet, or if you use more filters (for example to have a higher level
of protection), you must increase the surface area of the air intake holes.
VACON · 44 INSTALLATION INTO CABINET
5
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