Specifications

2.9.2 Emission Requirements
According to the EMC product standard for adjustable speed frequency converters EN/IEC 61800-3:2004 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 4 categories and the requirements for mains supply voltage conducted emissions are given
in Table 2.11.
Category Definition
Conducted emission requirement
according to the limits given in EN
55011
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
voltage lower than 1000 V.
Class A Group 2
C4 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.
No limit line.
An EMC plan should be made.
Table 2.11 Emission Requirements
When using generic emission standards, the frequency converters must comply with the limits in Table 2.12.
Environment Generic standard
Conducted emission requirement
according to the limits given in EN
55011
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 2.12 Emission Requirements, Generic Standards
Introduction VLT® HVAC Drive FC 102 Design Guide
40 MG16C102 - Rev. 2013-08-20
2
2