
Filter types vacon • 7
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2. F
ILTER
TYPES
2.1 RFI-filters
2.1.1 General
Table 1 shows the filters used to make the VACON
®
NX range of AC dri es comply with EN/IEC
61800-3 for the domestic and industrial en ironment, in case the basic dri e does not comply. All
enclosure sizes 4 - 9 comply with the requirements of EN/IEC 61800-3, ed 2 for the categories 1 and
2, the 690 V ersions for category 3. The common DC bus system components and dri es which ha e
rated current higher than 400 A are designed to category 4. Therefore the basic modules do not ha e
any specific compliance, but the whole installation has to be designed to comply with the
requirements.
The stand - alone and VACON
®
NXC solutions comply with category 3 requirements.
Definitions:
First environment
En ironment that includes domestic premises and establishments directly connected without
intermediate transformers to a low- oltage power supply network, which supplies buildings used
for domestic purposes.
NOTE! Houses, apartments, commercial premises or offices in a residential building are typical
examples of the first en ironment location.
Second environment
En ironment that includes all establishments other than those directly connected to a low oltage
power supply network, which supplies buildings used for domestic purposes.
NOTE! Industrial areas, technical areas of any building fed from a dedicated transformer are typical
examples of the second en ironment locations (IEC 923/04).
EMC designation C => fulfils the requirements of category 1: PDS (power dri e system (AC dri e plus
motor)) of rated oltage less than 1000 V, intended for use in the first en ironment.
EMC designation H => fulfils the requirements of category 2: PDS of rated oltage less than 1000 V,
which is neither a plug-in de ice nor a mo able de ice and, when used in the first en ironment, is
intended to be installed and commissioned only by a professional.
NOTE! A professional is a person or an organization ha ing necessary skills in installing and/or
commissioning power dri e systems, including their EMC aspects.
EMC designation L => fulfils the requirements of category 3: PDS of rated oltage less than 1000 V,
intended for use in the second en ironment and not intended for use in the first en ironment.
EMC designation N => fulfils the requirements of category 4: PDS of rated oltage equal to or abo e
1000 V, or rated current equal to or abo e 400 A, or intended for use in complex systems in the
second en ironment.
NOTE! In this case the compliance has to be erified case by case.
The filters must be correctly installed and grounded.
There are no standards at present for IT supplies (floating supplies) - the EMC code T shows that
the dri es and dri e modules ha e ery small ground capacitance making them suitable for use on
IT supplies. The small capacitance is required as larger alues would cause the installed ground
circuit monitoring circuits to fail. We recommend the use of monitors manufactured by Bender.