Schaffner Group
User and Installation Manual
Output filter FN5420 and RWK5420
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3.4 Additional electrical specifications
Schaffner output filter type sine wave filter FN5420 and dv/dt reactor type RWK5420 general electrical
specifications refer to operating altitudes up to 2000m a.s.l. (6600ft).
Operation between 2000m and 4000m (6600ft and 13123ft) requires a derating on clearance accord-
ing to IEC 60664-1 (table A.2), hereafter enclosed:
Table 7 Altitude correction factors
Additionally a derating on current is applied in this range. The following chart summarize both the mul-
tiplication factor on creepage and the current derating for usage between these altitudes.
Figure 7 chart of altitude correction factors and current derating
Remark:
Do not use these filters in altitudes above 4000m without consulting Schaffner first.
Note that clearance of the product itself are compliant at least up to 4000m but customer has to take
care of respecting the clearance by selecting cable lug and installing them properly.
