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VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
Section 1Section 1Section 1Section 1Section 1
Section 2Section 2Section 2Section 2Section 2
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Section 4Section 4Section 4Section 4Section 4
What is CE-labelling ?
The purpose of CE-labelling is to avoid technical obsta-
cles to trade within EFTA and the EU. The EU has
introduced the CE-label as a simple way of showing
whether a product complies with the relevant EU
directives. The CE-label says nothing about the quality
or specifications of a product. Three EU directives relate
to frequency converters:
2. The frequency converter is intended for use in a
complete product. It is sold e.g. to a professional
machine builder who has the technical knowledge
it takes to install the frequency converter correctly.
The frequency converter need not be CE-labelled
in accordance with the EMC directive. Instead, the
frequency converter manufacturer must provide
detailed guidelines on how to carry out an EMC-
correct installation.
3. The frequency converter is intended for use in an
installation built up on the site of use by a profes-
sional. This could be e.g. a complete installation
for manufacturing purposes or for the generation
of heat/ventilation. The installation is planned and
made by a professional installer. The complete sy-
stem is not to be CE-labelled in accordance with
the EMC directive. The system must comply with
the basic requirements contained in the directive.
This is ensured by using components, appliances
and systems which are CE-labelled in accordance
with the EMC directive.
4. The frequency converter is sold as part of a
complete system, such as an air-conditioning sy-
stem. The complete system must be CE-labelled
in accordance with the EMC directive.
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2.5 CE-labelling
•
The machine directive (89/392/EEC)
All machines with critical, moving parts are
covered by the machine directive which came into
force on 1 January 1995. Since a frequency con-
verter is largely electrical by function, it does not
fall under the machine directive. However, if a
frequency converter is supplied for use in a ma-
chine, we provide information about the safety
aspects relating to the frequency converter. We do
that by means of a manufacturer’s declaration.
•
The low-voltage directive (73/23/EEC)
Frequency converters must be CE-labelled in
accordance with the low-voltage directive, which
will come into force on 1 January 1997.
This directive applies to all electrical equipment
and appliances used in the voltage range of 50-
1000 VAC and 75-1500 VDC.
•
The EMC directive (89/336/EEC)
EMC is short for electromagnetic compatibility.
The presence of electromagnetic compatibility
means that the mutual interference between
different components/appliances is so small that
the functioning of the appliances is not affected.
The EMC directive came into force on 1 January
1996. The directive distinguishes between
components, appliances, systems and installati-
ons.
The EU “Guidelines on the Application of Council
Directive 89/336/EEC” outline four typical situations of
using a frequency converter. For each of these
situations, explanations are offered as to whether the
situation in question is covered by the EMC directive
and must be CE-labelled.
1. The frequency converter is sold direct to the end-
user. This applies for example if the frequency
converter is sold to a DIY-market. The end-user is
not an expert. He installs the frequency converter
himself, e.g. for controlling a hobby machine or a
domestic appliance. This frequency converter
must be CE-labelled in accordance with the EMC
directive.
Danfoss VLT
frequency converter and CE-labelling
CE-labelling is a positive feature when used for its ori-
ginal purpose, i.e. to facilitate trade within the EU and
EFTA. However, CE-labelling may cover many
different specifications. This means that it has to be
checked what a given CE-label specifically covers.
The specifications covered can in fact be widely
different. That is why the CE-label can give installers a
false feeling of security when using a frequency con-
verter as a component in a system or an appliance.
We CE-label our VLT frequency converters in
accordance with the low-voltage directive. This
means that as long as the frequency converter is
installed correctly, we guarantee that it complies with
the low-voltage directive. We issue a declaration of
conformity confirming that our CE-label complies with
the low-voltage directive.
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The CE-label also applies to the EMC directive on the
condition that the EMC-correct installation and filte-
ring instructions in the manual have been followed.
On this basis a conformity declaration is issued in
accordance with the EMC directive.