09/01 AWB8230-1412GB
EMC guidelines
17
EMC guidelines
The limit values for emitted interference and immunity with vari-
able speed drives are described in the IEC/EN 61800
-3 product
standard.
When operating the frequency inverters of the DF5 series in coun-
tries which are part of the European Union (EU), the EMC guideline
89/336/EEC must be observed. The following conditions described
must be observed in order to comply with this guideline:
Supply voltage (mains voltage) for the frequency inverter:
• voltage fluctuation g10 % or less
• voltage imbalance g3% or less
• frequency variation g4 % or less
If the above mentioned conditions are not fulfilled, the respective
mains choke must be installed (a Section ”Mains choke” in the
Appendix, Page 116).
EMC interference class
When installation is completed according to the Section ”Installa-
tion”, described in ”EMC guidelines” Page 17 and with the use of
a radio interference filter, the frequency inverters of the DF5 series
comply to the following standards:
• Emitted interference:
IEC/EN 61800-3 (EN 55011 group 1, class B)
• Noise immunity:
EN 61800-3, industrial environment
With frequency inverters, performance related and emitted interfe-
rence increase with the switching frequency. The frequency of
occurrence of performance related interference also increase with
longer motor cables. When the respective radio interference filter
is used, the EN 61800-3 standard is complied to as follows:
Noise immunity
DF5 series frequency inverters conform with the requirements of
the EC/EN 61800
-3 EMC-product standard for industrial use
(second environment), and the higher interference immunity
values in domestic environments (first environment) with the
assigned radio interference filters.
A domestic environment can be understood to be a connection
point (transformer feeder) to which domestic households are also
connected.
The EMC
-guideline for an industrial system requires electromag-
netic compatibility with the environment as a whole. The product
standard examines a typical drive system in principle as a complete
system, i.e. the combination of frequency inverter, cables and
motor.
Emitted interference and radio interference suppression
DF5 series frequency inverters conform with the requirements of
the EC/EN 61800
-3 EMC-product standard for domestic use (first
environment), and therefore also with the higher interference
immunity values in industrial environments (second environment)
with the assigned radio interference filters.
Ensure compliance to the limit values with the following points:
• reduction of performance related interference with line filters
and/or radio interference filters including mains chokes.
• reduction of the electromagnetic emission interference by
screening motor cables and signal cables.
• compliance with installation guidelines (EMC compliant
installation).
Conformity
General Limited
First environment
(Public power grid)
Up to 10 m motor cable
lengths with 16 kHz
(maximum switching
frequency)
Up to 50 m
1)
Up to 20 m motor cable
lengths with maximum
5 kHz switching frequency
Second environ-
ment (Industrial)
Up to 50 m Up to 50 m
1) This is a product with limited conformity according to IEC/
EN 61800-3. This product can cause radio frequency interference in
domestic environments. In this case, it is necessary that the user
undertakes the required protection measures.
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