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VACON® NXP IP00 Drive Modules
Operating Guide
A
1
Illustration 9: Arrangements for Steering Internal Airflow
A
Arrangement with air duct
B
Arrangement with air barriers
To allow free air circulation, the touch cover at the bottom of the cabinet must be of type meshed sheet metal screen. Also, the
busbar touch protection cover and the upper support for the AC choke must be equipped with holes. See
If a flat roof is used, mount a V-shaped air guide on the underside of the roof to direct the airflow horizontally. See
Illustration 10: Roof Structure (Side View)
5.2.3 Heat Dissipation
The efficiency of the AC drive is a function of switching frequency, operating frequency, and load (see VACON NXC Enclosed Drive
Operating Guide). Based on this information, heat dissipation can be calculated at a certain operating point. For most cases the
following general formula based on AC drive load can be used to estimate the heat dissipation of the power unit:
kW = kW ∗ 0 . 025
P
loss
The following table shows the heat dissipation from the AC choke.
Table 8: Heat Dissipation from the AC Choke
AC choke
CHK0261
CHK0400
CHK0520
CHK0650
Danfoss A/S © 2023.09
B
2
1
2
Heat dissipation
460 W
570 W
810 W
890 W
Air duct
Shields
Illustration
AQ351737303996en-000201 / DPD00888 | 31
Mounting the Unit
9.
Illustration
10.
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