Mechanical Installation (T1 to T9 Models)
‑70‑
AC Drive Power
Cooling Air Flow for the AC Drive (CFM)
18.5 kW
52
22 kW
58
30 kW
130
37 kW
102
45–55 kW
125
75–90 kW
225
110 kW
350
132 kW
541
160 kW
620
Note: 1 CFM = 0.02832 m
3
/min
Cabinet fan design
Cabinet fan selection procedure:
1. Calculate the sum of cooling air flow required by all the AC drives based on "
Table
4–4 Cooling air flow for the AC drive
"
on page 69
.
2. Determine the maximum air flow (Qmax) of the cabinet.
3. Determine the specifications and quantity of fans according to the maximum air
flow (Qmax).
Note that:
Maximum air flow of the cabinet = 1.3...1.5 x Sum of cooling air flow
Maximum air flow of the cabinet = 1.6...2.2 x Sum of cooling air flow (for applications
with a dry net shutter, or other components installed at the cabinet air outlet)
Note
Select a fan whose air volume is not smaller than the maximum air volume Qmax. Install
multiple fans in parallel if one fan alone cannot meet the requirements.
The following figure shows typical fan air flows.
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