Schaffner Group
User and Installation Manual
Ecosine evo
October 2018
8/50
1. Ecosine evo passive harmonic filter designation
1.1 Distinguishing between FN 3440/FN 3441, FN 3450/FN 3451, FN 3442/FN 3443 and FN 3452/FN 3453
Before going into the details of the designation, it is important to be aware of the difference between
FN 3440 and FN 3441, FN 3450 and FN 3451, FN 3442 and FN 3443, FN 3452 and FN 3453. FN 3440, FN
3450, FN 3442 and FN 3452 are used for motor drives without dc-link choke. They are similar to FN 3441, FN
3451, FN 3443 and FN 3453 except there is one choke less in FN 3441, FN 3451, FN 3443 and FN 3453
series as they are meant to be used for motor drives with dc-link choke (8%) included. In other words, there
are three chokes (line choke, trap choke and load choke) included in filter series FN 3440, FN 3450, FN 3442
and FN 3452, whereas there are only two chokes (line choke, trap choke) included in filter series FN 3441,
FN 3451 FN 3443 and FN 3453 series.
By distinguishing between FN 3440, (FN 3450, FN 3442, FN 3452) as well as FN 3441 (FN 3451, FN 3443,
FN 3453) Schaffner is able to provide optimized solutions for different drive types:
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If there is no DC-link choke present in the motor drive, FN 3440, FN 3450, FN 3442, FN 3452 filter
series help to reduce THID to 5% @ rated power.
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If there is a minimum 8% DC-link choke present in the motor drive, FN 3441, FN 3451, FN 3443, FN
3453 filter series reduce THID to 5% @ rated power
In case you have difficulties to decide for the right filter, please contact your local Schaffner representative for
support.
1.2 Explanation of ecosine evo designation
Ecosine evo is the new generation of Schaffner passive harmonic filter. They are introduced with a new
designation system, which contains of 4 sections connected with ‘-’ as shown in
Figure 1 Ecosine evo designation
