Mechanical Installation (T1 to T9 Models)
‑69‑
Table 4–3 Minimum effective area of air outlet on a self‑ventilated cabinet
AC Drive
Minimum Effective Area of Air Outlet on a
Self‑ventilated Cabinet (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 69
Data shown in the preceding table applies to situations where only one AC
drive is mounted in the cabinet. For a cabinet containing multiple AC drives,
calculate the total effective outlet area by summing each single effective area
according to the table.
If an air filter is installed at the outlet, the air outlet resistance will rise significantly
and the ventilation opening area must be increased to 1.2–1.5 times the value
indicated in the table.
"
Table 4–3 Minimum effective area of air outlet on a self‑ventilated cabinet
"
on
page 69
Effective area in the preceding table refers to the actual through‑hole area
of an opening. The effective area is calculated by multiplying the opening area by
the cut‑out rate.
2. Active ventilation
In active ventilation, a fan is installed on the top of the cabinet to draw hot air out
of the cabinet. Active ventilation is commonly used.
For smooth discharge of hot air, ensure that the overall exhaust air flow of the
cabinet is greater than the sum of exhaust air flow of all the AC drives in the
cabinet. MD500‑PLUS "
Table 4–4 Cooling air flow for the AC drive
"
on page 69
lists
the required cooling air flow.
Table 4–4 Cooling air flow for the AC drive
AC Drive Power
Cooling Air Flow for the AC Drive (CFM)
0.4–1.1 kW
/
1.5–3.0 kW
11
3.7 kW
20
5.5 kW
24
7.5 kW
29
11–15 kW
50
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