Engineering
01/02 AWB8230-1413GB
18
EMC requirements
The limit values for emitted interference and immunity for variable
speed drives are described in the
IEC/EN 61800
-
3 Product
Standard.
If you use DF6 frequency inverters in European Union (EU)
countries, you must observe the EMC Directive 89/336/EEC.
The following conditions must be observed to comply with this
Directive:
Supply voltage (mains voltage) for the frequency inverter:
• Voltage fluctuation
g
10 % or less
• Voltage imbalance
g
3 % or less
• Frequency variation
g
4 % or less
If one of the conditions listed here cannot be fulfilled, you must
install an appropriate mains choke (
a
section “Mains choke”,
page 165).
EMC interference class
Installed according to the “EMC guidelines“ in section
“Installation” on page 21 and with the use of a radio interference
filter, the DF6 frequency inverters conform to the following
standards:
• Emitted interference:
IEC/EN 61800-3 (EN 55011 group 1, class B)
• Noise immunity:
IEC/EN 61800-3, industrial environment
With frequency inverters, performance related and emitted
interference increases with the pulse frequency. The frequency at
which performance-related interference occurs also increases with
longer motor cables. When the assigned radio interference filter is
used, the EN 618003 standard is complied to as follows:
Noise immunity
Used with the assigned radio interference filters, the DF6
frequency inverters meet the interference immunity requirements
of the EMC Product Standard IEC/EN 61800
-
3 for industrial
environments (second environment) and for domestic use
(first environment).
A “domestic environment” is defined here as a connection point
(transformer feeder) to which domestic households are also
connected.
For industrial systems, the EMC Directive requires electromagnetic
compatibility with the environment as a whole. The Product
Standard regards a typical drive system as a complete unit, i.e. the
combination of frequency inverter, cables and motor.
Emitted interference and radio interference suppression
Used with the assigned radio interference filters, the DF6
frequency inverters meet the requirements of the EMC Product
Standard IEC/EN 61800
-
3 for domestic use (first environment) and
therefore also for the higher limit values of industrial environments
(second environment).
To ensure compliance to the limit values, observe 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 requirements
(EMC-compliant installation).
Availability
General
Limited
First environment
(public mains
network)
Up to 10 m motor cable
length at 12 kHz
(maximum pulse
frequency)
Up to 50 m
1)
Up to 20 m motor cable
lengths at a pulse
frequency of up to 5 kHz
Second
environment
(industrial)
Up to 50 m
Up to 50 m
1) This is a product with limited availability as defined by IEC/
EN 618003. This product can cause radio-frequency interference in
domestic environments. In this case appropriate protection
measures must be implemented by the user.
efesotomasyon.com - Klockner Moeller - inverter
