Important Instructions For Plants With Line Filters - ABB DCS800 Series Installation Manual

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Important instructions for plants with line filters

Filter in a grounded line (earthed TN or TT network):
The filters are suitable for grounded lines only, for example in public European 400
V lines. According to EN 61800-3 filters are not needed in insulated industrial lines
with own supply transformers. Furthermore they could cause safety risks in such
floating lines (IT networks).
Residual current detection:
Together filters (with internal discharging resistors), cables, converter and motor
have a considerable capacity to ground which can cause an increased capacitive
residual current. The tripping threshold of an residual current detector which
measures this current must be adapted to this higher value.
High voltage test:
Because of the capacitors of the line filter the high voltage test has to be done with
DC voltage to protect the components.
EMC Standards
3ADW000352R0101 DCS800-A Installation Manual e a