Danfoss VLT AutomationVTDrive FC322 Design Manual page 36

Automation VT Drive FC322 Design Guide
2.9.2 Emission Requirements
According to the EMC product standard for adjustable speed frequency converters EN/IEC61800-3:2004 the EMC requirements depend on the intended
use of the frequency converter. Four categories are defined in the EMC product standard. The definitions of the four categories together with the
requirements for mains supply voltage conducted emissions are given in the table below:
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 neither plug-in nor movable and are intended to be
installed and commissioned by a professional.
C3 frequency converters installed in the second environment (industrial) with a supply volt-
age lower than 1000 V.
C4 frequency converters installed in the second environment with a supply voltage above
1000 V and rated current above 400 A or intended for use in complex systems.
When the generic emission standards are used the frequency converters are required to comply with the following limits:
Environment Generic standard
First environment EN/IEC61000-6-3 Emission standard for residential, commercial and
(home and office) light industrial environments.
Second environment EN/IEC61000-6-4 Emission standard for industrial environments.
(industrial environment)
MG.20.X1.22 - VLT
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2 Introduction to VLT Automation VT Drive
Conducted emission requirement
according to the limits given in
EN55011
Class B
Class A Group 1
Class A Group 2
No limit line.
An EMC plan should be made.
Conducted emission requirement ac-
cording to the limits given in
EN55011
Class B
Class A Group 1
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