3.5.3 Emission Requirements
According to the EMC product standard for adjustable speed adjustable frequency drives EN/IEC 61800-3:2004, the EMC
requirements depend on the environment in which the adjustable frequency drive is installed. These environments along
with the AC line voltage supply requirements are defined in Table 3.15.
Category Definition
Conducted emission requirement
according to EN 55011 limits
C1 Adjustable frequency drives installed in a home and office environment with a
supply voltage less than 1,000 V.
Class B
C2 Adjustable frequency drives installed in the home and office environment with a
supply voltage less than 1,000 V. These adjustable frequency drives are not plug-in
and cannot be moved and are intended to for professional installation and commis-
sioning.
Class A Group 1
C3 Adjustable frequency drives installed in an industrial environment with a supply
voltage lower than 1,000 V.
Class A Group 2
C4 Adjustable frequency drives installed in an industrial environment with a supply
voltage equal to or above 1,000 V or rated current equal to or above 400 A or
intended for use in complex systems.
No limit line
Make an EMC plan
Table 3.15 Emission Requirements
When the generic emission standards are used, the adjustable frequency drives are required to comply with Table 3.16
Environment Generic Standard
Conducted emission requirement
according to EN 55011 limits
First environment
(home and office)
EN/IEC 61000-6-3 Emission standard for residential, commercial,
and light industrial environments.
Class B
Second environment
(industrial environment)
EN/IEC 61000-6-4 Emission standard for industrial environments. Class A Group 1
Table 3.16 Generic Emission Standard Limits
Product Introduction Design Guide
MG34S222 Danfoss A/S © Rev. 2014-02-10 All rights reserved. 49
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