See the dimensions of the DC filters in
To avoid excess temperature rise of the top mounted inductors in the cabinet installation, sufficient airflow through the inductors
must be guaranteed. To guide the airflow through the inductors, use air baffles with an external cooling fan as shown in
.
The power losses of filters in the low current range (10–50 A) are typically low enough to install the inductors without extra air
baffles and fan. In the filter range above 50 A, the cooling arrangement must be implemented.
The cabinet cooling must be guaranteed also with liquid-cooled DC filters. Typically 30–40% of the power losses from the filter are
transferred to air and 60–70% into liquid.
Note:
If a forced air-cooled filter is used, the cooling fan or blower must be provided separately.
See the specifications for the cooling system in
7.3 Cooling System Requirements
.
1
1
1
1
1
2
2
e3
0b
j3
54
.1
0
Illustration 6: DC Filter Mounting Example
1
Air guides
2
Airflow
AJ377845348678en-000101 / 172F4785 | 15
Danfoss A/S © 2023.01
Installation Guidelines
DC Filters
Design Guide
