Operating & Mounting instructions – 8 074 143.03/03 – Page 90
RFI-filters CE-DR
All devices and equipment in electric power engineering can cause electromagnetic interference and
be disturbed by electromagnetic interference. Therefore, they are subject to the provisions of the
EMV directive 89/336/EEC
since 1.1.1996.
However, frequency inverters cannot be regarded as machines with at least one mechanically
moving component. Therefore, the Machine Directive 89/392/EEC
does not apply.
The frequency inverters >pDRIVE< CX have a CE mark on the rating plate. However, in order to
reach the relevant limits, it is necessary to comply with the installation instructions.
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ii..ee.. ccoonnffoorrmmiittyy wwiitthh:: EENN 6611880000-33 aanndd EENN 5500117788
Installation rules:
• Use of the option "CE-DR Filter" or use of an equivalent filter solution
• Assembly on a properly grounded metal assembly plate.
• Use and proper connection (at both ends !!) of screened motor cables
• Reduce clock frequency to ≤ 5 kHz
• Use and proper connection of screened control cables
• Grounding the frequency inverter with at least 10 mm
2
for personal safety
• Separate installation of motor cables and other cables, especially control wires
Important remarks:
Motor cable lengths
The specifications regarding the permissible distance between the inverter and the motor must be
complied with. Too long motor cables can damage the inverter!
Protective measure FI safety switch
Radio interference suppression filters contain conduction capacitors to earth, i.e. the leakage current
of the entire drive is increased and there is a short charging current when the inverter is switched on.
REMEDY:
Use FI safety switches with short-time delay and higher trigger level.
WARNING:
FI safety switches do not provide absolute protection against direct contact!! Therefore,
they should always be used in conjunction with other protective measures.
Line choke (built-in into the CE-DR RFI-filter)
The CE-DR filters contain a line choke. Therefore, an additional external choke is not required.
The line choke is used to reduce the harmonic oscillation caused by the intermediate circuit and the
commutation drops caused by the rectifier.
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