EU
DIRECTIVE
9(110)
2
Class T:
Frequency converters of this class fulfil the product standard EN 61800-3 (2004) if intended to be used in
IT systems. In IT systems, the networks are isolated from earth, or connected to earth through high imped-
ance to achieve a low leakage current. NOTE: if converters are used with other supplies, no EMC
requirements are complied with.
Class N:
The drives of this class do not provide EMC emission protection. These kinds of drives are mounted in
enclosures. NOTE: An external EMC filter is usually required to fulfil the EMC emission requirements.
All NX frequency converters fulfil all EMC immunity requirements (standard EN 61800-3 (2004).
Note:
For changing the EMC protection class of your NX frequency converter from class H or L to class T,
please refer to the instructions given in Chapter 6.1.3.
2.2.3.1
Environment definitions in product standard EN 61800-3 (2004)
First environment:
Environment that includes domestic premises. It also includes establishments directly
connected without intermediate transformers to a low-voltage power supply network which supplies
buildings used for domestic purposes.
NOTE: houses, apartments, commercial premises or offices in a residential building are examples of first
environment locations.
Second environment:
Environment that includes all establishments other than those directly connected to
a low-voltage power supply network which supplies buildings used for domestic purposes.
NOTE: industrial areas, technical areas of any building fed from a dedicated transformer are examples of
second environment locations.
2.2.4
Manufacturer's declaration of conformity
The following pages present the Manufacturer's Declarations of Conformity assuring the compliance of the
NX frequency converters with the EMC-directives.
Warning:
This is a product of the restricted sales distribution class according to IEC 61800-3. In a
domestic environment this product may cause radio interference in which case the user may be
required to take adequate measures.