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
Conducted emission requirement
according to the limits given in
EN55011
C1
frequency converters installed in the first environment (home and office) with a supply
voltage less than 1000 V.
Class B
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.
Class A Group 1
C3
frequency converters installed in the second environment (industrial) with a supply volt-
age lower than 1000 V.
Class A Group 2
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.
No limit line.
An EMC plan should be made.
When the generic emission standards are used the frequency converters are required to comply with the following limits:
Environment
Generic standard
Conducted emission requirement ac-
cording to the limits given in
EN55011
First environment
(home and office)
EN/IEC61000-6-3 Emission standard for residential, commercial and
light industrial environments.
Class B
Second environment
(industrial environment)
EN/IEC61000-6-4 Emission standard for industrial environments.
Class A Group 1
2 Introduction to VLT AQUA Drive
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AQUA Drive Design Guide
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