Filters; Du/Dt Filter - Danfoss iC7 Series Design Manual

Design Guide | iC7 Series Liquid-cooled System Modules
Figure 78: Level C3
Figure 79: Level C4
4.
After the change, write "The EMC level was changed from C3 to C4", and the date on the "product modified" label. If the label is
not yet attached, attach it on the drive near the product label.

Filters

7.13

dU/dt Filter

7.13.1
With the dU/dt Filter, the nominal switching frequency is 2 kHz. The maximum switching frequency is 4 kHz.
The dU/dt Filter can be used without derating up to 70 Hz. For output frequencies higher than 70 Hz, current must be derated according
to the curve presented below. Above 200 Hz, a special high-speed filter is recommended.
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