Decentral Solutions
Introduction to FCD
300
■
CE labelling
What is CE labelling?
The purpose of CE labelling is to avoid technical
obstacles 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
specifications or quality of the product. Variable
frequency drives are regulated by three EU directives:
The machinery directive (98/37/EEC)
All machines with critical moving parts are covered
by the machinery directive, which came into force on
January 1, 1995. Since a variable frequency drive is
largely electrical, it does not fall under the machinery
directive. However, if a variable frequency drive is
supplied for use in a machine, we provide information on
safety aspects relating to the variable frequency drive.
We do this by means of a manufacturer
’
s declaration.
The low-voltage directive (73/23/EEC)
Variable frequency drives must be CE-labelled in
accordance with the low-voltage directive, which came
into force on January 1, 1997. The directive applies to
all electrical equipment and appliances used in the 50 -
1000 Volt AC and the 75 - 1500 Volt DC voltage ranges.
Danfoss CE labels in accordance with the directive and
issues a declaration of conformity upon request.
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.
Danfoss CE labels in accordance with the directive and
issues a declaration of conformity upon request. In
order that EMC-correct installation can be carried out,
this manual gives detailed instructions for installation. In
addition, we specify the standards which our different
products comply with. We offer the filters that can be
seen from the specifications and provide other types of
assistance to ensure the optimum EMC result.
In the great majority of cases, the variable frequency
drive is used by professionals of the trade as a complex
component forming part of a larger appliance, system
or installation. It must be noted that the responsibility
for the final EMC properties of the appliance, system
or installation rests with the installer.
■
ATEX
What is ATEX?
Directive 94/9/EC is valid in the European Union (EU)
with the purpose of creating unified standards for
equipment and protective systems intended for use in
potentially explosive atmospheres. The directive was
valid from July 2003, and all equipment installed and
built into potentially explosive areas in EU after this date,
must comply with this directive. The directive and its
derivatives are often referred to as the ATEX-directive.
ATEX is an acronym for ATmosphere Explosible.
It has been found practical to classify hazardous
areas into zones according to the likelihood of an
explosive gas/dust atmosphere being present (see IEC
79-10). Such classification allows appropriate types
of protection to be specified for each zone.
Motors supplied at variable frequency and voltage
When electrical motors are to be installed in areas
where dangerous concentrations and quantities of
flammable gases, vapors, mists, ignitable fibers or dust
may be present in the atmosphere, protective measures
are applied to reduce the likelihood of explosion due to
ignition by arcs, sparks or hot surfaces, produced either
in normal operation or under specified fault conditions.
Motors supplied at varying frequency and
voltage require either:
•
Means (or equipment) for direct temperature control
by embedded temperature sensors specified in the
motor documentation or other effective measures
for limiting the surface temperature of the motor
housing. The action of the protective device shall
be to cause the motor to be disconnected. The
motor and adjustable frequency drive combination
does not need to be tested together, or
•
The motor must have been type-tested for this
duty as a unit in association with the adjustable
frequency drive specified in the descriptive
documents according to IEC 79-0 and with
the protective device provided.
FCD 300 and ATEX
The following variants of the FCD 300 can be installed
directly in Group II, Category 3, and Zone 22 areas:
VLT
®
Decentral FCD3xx-P-T4-P66-xx-R1-
Dx-Fxx-T11-Cx
VLT
®
Decentral FCD3xx-P-T4-P66-xx-R1-
Dx-Fxx-T12-Cx
MG.90.F2.22 - VLT is a registered Danfoss trademark
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