Emission Requirements - Danfoss VLT Compressor Drive CDS 803 Design Manual

Product Overview
2 2
1 Ground wire
2 Screen
Illustration 2.7 Generation of Leakage Currents

2.7.2 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 2.4 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.
20
VLT
C
z
L1
S
U
z
L2
V
z
L3
W
z PE
PE
C
S
I
4
3
4
3
4
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®
Compressor Drive CDS 803
I
1
I
C
2
S
I
3
AC mains supply
Frequency converter
Category
C4
Equivalent
emission class
Table 2.4 Correlation between IEC 61800-3 and EN 55011
in EN 55011
Class B
When the generic (conducted) emission standards are
used, the frequency converters are required to comply with
the limits in Table 2.5.
Class A Group 1
Environment
First
environment
(home and
office)
Class A Group 2
Second
environment
(industrial
environment)
Table 2.5 Correlation between Generic Emission Standards and
EN 55011
1
2
C
S
I
4
5
5 Screened motor cable
6 Motor
Definition
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.
Generic emission
standard
EN/IEC 61000-6-3 Emission
standard for residential,
commercial, and light
industrial environments.
EN/IEC 61000-6-4 Emission
standard for industrial
environments.
C
S
C
S
6
Equivalent
emission class
in EN 55011
No limit line.
Make an EMC
plan.
Equivalent
emission class in
EN 55011
Class B
Class A Group 1
MG18N202