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EMC and Harmonics
9.3 Emission Requirements
According to the EMC product standard for frequency converters EN/IEC 61800-3, the EMC requirements depend on the
environment in which the frequency converter is installed. These environments along with the mains voltage supply
requirements are defined in Table 9.3.
Category
Definition
C1
Frequency converters installed in a home and office environment with a supply
voltage less than 1000 V.
C2
Frequency converters installed in the home and office environment with a supply
voltage less than 1000 V. These frequency converters are not plug-in and cannot be
moved and are intended to for professional installation and commissioning.
C3
Frequency converters installed in an industrial environment with a supply voltage
lower than 1000 V.
C4
Frequency converters installed in an industrial 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 9.3 Emission Requirements
When the generic emission standards are used, the frequency converters are required to comply with Table 9.4
Environment
Generic standard
First environment
EN/IEC 61000-6-3 Emission standard for residential, commercial,
(home and office)
and light industrial environments.
Second environment
EN/IEC 61000-6-4 Emission standard for industrial environments.
(industrial environment)
Table 9.4 Generic Emission Standard Limits
MG37N102
Design Guide
Danfoss A/S © 6/2016 All rights reserved.
Conducted emission requirement
according to EN 55011 limits
Class B
Class A Group 1
Class A Group 2
No limit line
Make an EMC plan
Conducted emission requirement
according to EN 55011 limits
Class B
Class A Group 1
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