Emission Requirements; Immunity Requirements - Danfoss VLT Refrigeration Drive FC 103 Design Manual

System Integration

3.2.3 Emission Requirements

The EMC product standard for frequency converters
defines 4 categories (C1, C2, C3, and C4) with specified
requirements for emission and immunity. Table 3.5 states
the definition of the 4 categories and the equivalent classi-
fication from EN 55011.
Category Definition
C1 Frequency converters installed in
the first environment (home and
office) with a supply voltage less
than 1000 V.
C2 Frequency converters installed in
the first environment (home and
office) with a supply voltage less
than 1000 V, which are not plug-in
and not movable, and must be
installed and commissioned by a
professional.
C3 Frequency converters installed in
the second environment (industrial)
with a supply voltage lower than
1000 V.
C4 Frequency converters installed in
the second environment with a
supply voltage equal to or above
1000 V or rated current equal to or
above 400 A or intended for use in
complex systems.
Table 3.5 Correlation between IEC 61800-3 and EN 55011
When the generic (conducted) emission standards are
used, the frequency converters are required to comply with
the limits in Table 3.6.
Generic emission
Environment
standard
First EN/IEC 61000-6-3 Emission
environment standard for residential,
(home and commercial, and light
office) industrial environments.
Second EN/IEC 61000-6-4 Emission
environment standard for industrial
(industrial environments.
environment)
Table 3.6 Correlation between Generic Emission Standards and
EN 55011
MG16G202
Design Guide

3.2.4 Immunity Requirements

The immunity requirements for frequency converters
depend on the environment where they are installed. The
requirements for the industrial environment are higher
than the requirements for the home and office
environment. All Danfoss frequency converters comply
with the requirements for the industrial environment.
Therefore, the frequency converters also comply with the
Equivalent
lower requirements for home and office environment with
emission class
a large safety margin.
in EN 55011
Class B
To document immunity against electrical interference, the
following immunity tests have been made in accordance
with following basic standards:
Class A Group 1
•
•
Class A Group 2
•
No limit line.
Make an EMC
•
plan.
•
See Table 3.7.
Equivalent
emission class in
EN 55011
Class B
Class A Group 1
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EN 61000-4-2 (IEC 61000-4-2): Electrostatic
discharges (ESD): Simulation of electrostatic
discharges from human beings.
EN 61000-4-3 (IEC 61000-4-3): Incoming electro-
magnetic field radiation, amplitude modulated
simulation of the effects of radar and radio
communication equipment as well as mobile
communications equipment.
EN 61000-4-4 (IEC 61000-4-4): Burst transients:
Simulation of interference brought about by
switching a contactor, relay, or similar devices.
EN 61000-4-5 (IEC 61000-4-5): Surge transients:
Simulation of transients brought about for
example by lightning that strikes near instal-
lations.
EN 61000-4-6 (IEC 61000-4-6): RF common
mode: Simulation of the effect from radio-
transmission equipment joined by connection
cables.
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