Mechanical Installation (T1 to T9 Models)
‑86‑
effective area of air outlet on a self‑ventilated cabinet
"
on page 86
when passive
air ventilation is used.
Table 4–3 Minimum effective area of air outlet on a self‑ventilated cabinet
AC Drive
Minimum effective area of the cabinet air
outlet in the passive air ventilation mode (cm
2
)
T1 32
T2 40
T3 (7.5 kW)
T3 (11 kW)
80
T4
T5 96
T6 to T7 163
T8 326
T9 509
"
Table 4–3 Minimum effective area of air outlet on a self‑ventilated cabinet
"
on
page 86
applies to situations where only one AC drive is mounted in the cabinet.
For a cabinet containing multiple AC drives, calculate the total ventilation outlet
area by adding the ventilation area of each drive according to the table.
If an air filter is installed at the outlet, the air outlet resistance will rise
significantly. Therefore, the ventilation area must be increased to 1.2 to 1.5 times
the value indicated in the table.
The effective area in "
Table 4–3 Minimum effective area of air outlet on a self‑
ventilated cabinet
"
on page 86
refers to the actual through‑hole area in the
opening area, which means the effective area = opening area x opening rate.
● Active air ventilation
In the active air ventilation mode, a fan is installed at the top of the cabinet to
draw hot air out of the cabinet. This is a commonly used ventilation mode.
To ensure that the hot air can be exhausted to the outside, the total air volume of
the fan cannot be smaller than that of all drives in the cabinet. "
Table 4–4 AC drive
cooling air volume
"
on page 86
lists the cooling air flow required by the drive.
Table 4–4 AC drive cooling air volume
AC Drive Power
Cooling Air Flow (CFM)
0.4 kW to 1.1 kW /
1.5 kW to 3.0 kW
11
3.7 kW
20
5.5 kW
24
7.5 kW
29
11 kW to 15 kW
50
18.5 kW
52
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