FC 300 Design Guide
Introduction to FC 300
an adjustable frequency drive is supplied for use in a machine, we provide information on safety aspects
relating to the adjustable frequency drive. We do this by means of a manufacturer’s de claration.
The low-voltage directive (73/23/EEC)
Adjustable frequency drives must be CE-labeled in accordance with the low-voltage directive of
January 1, 1997. The dire ctive applies to all electrical equipment and appliances used in the
50 - 1000 V AC and the 75 - 1500 V DC voltage ranges. Danfoss CE-labels in accordance with
the directive and issues a d eclaration of conformity upon request.
The EMC directive (89/336/EEC)
EMC is short for electrom agnetic compatibility. The presence of electromagnetic compatibility means that the
mutual interference between different components/appliances does not affect the way the appliances work.
The EMC directive came into e ffect January 1, 1996. Danfoss CE-labels in accordance with the directive and
issues a declaration of conformity upon request. To carry out EMC-correct installation, see the instructions in
this Design Guide. In addition, w e specify which standards our prod u cts c omply with. We offer the f
ilters
presented in the specifications and provide other types of assistance to ensure the op timum EMC result.
The adjustable frequency d rive is most ofte n use d by professionals of the trade as a complex component
forming part of a larger appliance, system or installation. It must be n oted that the re spons ibility for
the final EMC properties of the appliance, system, or installation lies with th
einstaller.
" What Is Covered
The EU "Guidelines on the Application of Council Directive 89/336 /EEC" outline three typical situations
of using an adjustable frequency drive. See following for EMC coverage and
CE labeling.
1. The adjustable frequen cy drive is sold direc tly to the en d consu
mer. The adjustable frequency drive is
for example sold to a DIY market. The end consumer is a layman. He installs the adjustable frequency
drive himself for use with a hobby machine, a kitche n appl iance, etc. Fo r such appli cations, the
adjustable frequency drive must be CE-labeled in accordanc
e with the EMC directive.
2. The adjustable frequency drive is sold for installation in a p lant. The plant is built up by p rofessi onals of the
trade. It could be a production plant or a heating/ventilation pla nt de signed and installed by profes sionals
of the trade. Neither the adjustable frequency driv
e nor the finished p lant must be CE-labeled under the
EMC d irective. How ever, the unit must comply with the b asic EMC requirements of the directive. This is
ensured by using components, appliances, and systems that are CE-labeled under the EMC directive.
3. Theadjustablefrequencydriveissoldaspartofac
ompletesystem. Thesystemisbeingmarketed
as complete and could be e.g. an air conditioning system. ThecompletesystemmustbeCE-labeled
in accordance with the EMC directive. The manufacturer can ensure CE labeling under the EMC
directive either by using CE-labeled comp
onents or by testing the EMC of the system. If it chooses
to use only CE-labeled components, it does not have to test the entire system.
" Danfoss VLT Adjustable Frequency
Drive and CE L abeling
CE labeling is a positive feature when used for its original purpose, i.e. to facilitate trade within the EU and EFTA.
However, CE labeling may cover many d ifferent specifications. Thus, you must check
what a given CE label specifically covers.
The covered specificatio ns can be very different and a CE label may therefore give the installer a false sense
of security when using an adj
ustable frequency drive as a component in a system or a n appliance.
Danfoss CE labels the adjust
able frequency drives in accordance with the l ow-voltage dire ctive.
This means that if the adjustable frequency drive is inst alled correctly, we guarantee compliance
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MG.33.B4.22 - VLT is a registered Danfoss trademark
