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CE-EMC Installation Guidelines Section D-1
7. Minimize the distance between an interference source and an interference
sink (interference- threatened device), thereby decreasing the effect of the
emitted interference on the interference sink.
• You should use only interference-free devices and maintain a minimum
distance of 0.25 m from the adjustable frequency inverter.
8. Follow safety measures in the filter installation.
• If using external EMC filter, ensure that the ground terminal (PE) of the fil-
ter is properly connected to the ground terminal of the adjustable fre-
quency inverter. An HF ground connection via metal contact between the
housings of the filter and the adjustable frequency inverter, or solely via
cable shield, is not permitted as a protective conductor connection. The
filter must be solidly and permanently connected with the ground potential
so as to preclude the danger of electric shock upon touching the filter if a
fault occurs.
To achieve a protective ground connection for the filter:
• Ground the filter with a conductor of at least 10 mm
2
cross-sectional area.
• Connect a second grounding conductor, using a separate grounding ter-
minal parallel to the protective conductor. (The cross section of each sin-
gle protective conductor terminal must be sized for the required nominal
load.)