Danfoss VLT AutomationDrive FC 300 Design Manual page 17

FC 300 Design Guide
Airborne Particles such as dust may cause mechanical, electrical, or thermal failure in the fre-
quency converter. 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.
In environments with high temperatures and humidity, corrosive gases such as sulphur, nitrogen,
and chlorine compounds will cause chemical processes on the frequency converter components.
Such chemical reactions will rapidly affect and damage the electronic components. In such envi-
ronments, mount the equipment in a cabinet with fresh air ventilation, keeping aggressive gases
away from the frequency converter.
An extra protection in such areas is a coating of the printed circuit boards, which can be ordered
as an option.
Before installing the frequency converter, check the ambient air for liquids, particles, and gases.
This is done by observing existing installations in this environment. Typical indicators of harmful
airborne liquids are water or oil on metal parts, or corrosion of metal parts.
Excessive dust particle levels are often found on installation cabinets and existing electrical in-
stallations. One indicator of aggressive airborne gases is blackening of copper rails and cable ends
on existing installations.
The frequency converter has been tested according to the procedure based on the shown stand-
ards:
The frequency converter complies with requirements that exist for units mounted on the walls and
floors of production premises, as well as in panels bolted to walls or floors.
IEC/EN 60068-2-6:
IEC/EN 60068-2-64:
NB!
Mounting frequency converters in aggressive environments increases the risk of
stoppages and considerably reduces the life of the converter.
MG.33.B9.02 - VLT ® is a registered Danfoss trademark
Vibration (sinusoidal) - 1970
Vibration, broad-band random
2. Safety and Conformity
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