Mechanical Installation (T1 to T9 Models)
‑68‑
Figure 4‑4 Backflow of hot air in a self‑ventilated cabinet (without an isolating device)
To prevent backflow of hot air, use an isolating device in the self‑ventilated
cabinet. An isolating device may be a plate or an exhaust duct.
Figure 4‑5 Backflow of hot air in a self‑ventilated cabinet (with an isolating device)
Compared with the air inlet, the air outlet of the AC drive has a higher air
temperature and a lower air density. In passive ventilation, ensure enough effective
area of the cabinet air outlet. For minimum requirements, see "
Table 4–3 Minimum
effective area of air outlet on a self‑ventilated cabinet
"
on page 69
.
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