Schaffner Group
User and Installation Manual
Ecosine
max
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1 Ecosine max passive harmonic filter designation
1.1 Distinguishing between FN 3470/FN 3471, FN 3480/FN 3481, FN 3472/FN
3473 and FN 3482/FN 3483
The main difference between FN3470 (FN3472, FN3480 FN3482) and FN3471 (FN3473, FN3481,
FN3483) is the filter configuration, which is clearly shown in Figure 1 and Figure 2 below. FN3470,
FN3472, FN3480 and FN3482 filters contain 3 chokes, which enables them to handle the most tough
harmonic mitigation task and to achieve very high performance (5% THDi). FN3471, FN3473, FN3481
and FN3483 contain 2 chokes, they are optimal choice if the THDi requirement is lower or for drives
with DC-link choke present. The performance of all product variants at different drive setup can be
found in Table 1.
Figure 1 Filter configuration of FN3470, FN3472, FN3480 and FN3482
Figure 2 Filter configurations for FN3471, FN3473, FN3481 and FN3483
