Air Humidity; Aggressive Environments - Danfoss FC 300 Design Manual

FC 300 Design Guide
Danfoss VLT Frequency Converter and CE
Labelling
CE labelling is a positive feature when used for its original purpose, i.e. to facilitate trade within the EU
and EFTA.
However, CE labelling may cover many different specifications. Thus, you have to check what a given CE
label specifically covers.
The covered specifications can be very different and a CE label may therefore give the installer a false
feeling of security when using a frequency converter as a component in a system or an appliance.
Danfoss CE labels the frequency converters in accordance with the low-voltage directive. This means that
if the frequency converter is installed correctly, we guarantee compliance with the low-voltage directive.
Danfoss issues a declaration of conformity that confirms our CE labelling in accordance with the low-
voltage directive.
The CE label also applies to the EMC directive provided that the instructions for EMC-correct installation
and filtering are followed. On this basis, a declaration of conformity in accordance with the EMC directive
is issued.
The Design Guide offers detailed instructions for installation to ensure EMC-correct installation. Further-
more, Danfoss specifies which our different products comply with.
Danfoss gladly provides other types of assistance that can help you obtain the best EMC result.
Compliance with EMC Directive 89/336/EEC
As mentioned, the frequency converter is mostly used by professionals of the trade as a complex com-
ponent 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. As an aid to
the installer, Danfoss has prepared EMC installation guidelines for the Power Drive system. The standards
and test levels stated for Power Drive systems are complied with, provided that the EMC-correct instruc-
tions for installation are followed, see section Electrical Installation.

Air Humidity

The frequency converter has been designed to meet the IEC/EN 60068-2-3 standard, EN 50178 pkt.
9.4.2.2 at 50°C.

Aggressive Environments

A frequency converter contains a large number of mechanical and electronic components. All are to some
extent vulnerable to environmental effects.
The frequency converter should not be installed in environments with airborne liquids, parti-
cles, or gases capable of affecting and damaging the electronic components. Failure to take
the necessary protective measures increases the risk of stoppages, thus reducing the life of
the frequency converter.
Liquids can be carried through the air and condense in the frequency converter and may cause corrosion
of components and metal parts. Steam, oil, and salt water may cause corrosion of components and metal
parts. In such environments, use equipment with enclosure rating IP 55. As an extra protection , coated
printet circuit boads can be orded as an option.
Airborne Particles such as dust may cause mechanical, electrical, or thermal failure in the frequency con-
verter. A typical indicator of excessive levels of airborne particles is dust particles around the frequency
converter fan. In very dusty environments, use equipment with enclosure rating IP 55 or a cabinet for IP
00/IP 20/TYPE 1 equipment.
Introduction to FC 300
MG.33.B7.02 - VLT is a registered Danfoss trademark
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