Danfoss VLT AutomationDrive FC 300 Design Manual page 16

Safety and Conformity
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.
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A frequency converter contains a large number of
mechanical and electronic components. All are to some
extent vulnerable to environmental effects.
CAUTION
The frequency converter should not be installed in
environments with airborne liquids, particles, 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.
Degree of protection as per IEC 60529
The safe Stop function may only be installed and operated
in a control cabinet with degree of protection IP54 or
higher (or equivalent environment). This is required to
avoid cross faults and short circuits between terminals,
connectors, tracks and safety-related circuitry caused by
foreign objects.
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
54/55. As an extra protection, coated printed circuit boards
can be ordered as an option.
Airborne Particles such as dust may cause mechanical,
electrical, or thermal failure in the frequency 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 54/55 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 environments, 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.
NOTE
Mounting frequency converters in aggressive environments
increases the risk of stoppages and considerably reduces
the life of the converter.
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VLT AutomationDrive FC 300 Design Guide, 0.25-75 kW
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 instal-
lation cabinets and existing electrical installations. One
indicator of aggressive airborne gases is blackening of
copper rails and cable ends on existing installations.
D and E enclosures have a stainless steel back-channel
option to provide additional protection in aggressive
environments. Proper ventilation is still required for the
internal components of the drive. Contact Danfoss for
additional information.
The frequency converter has been tested according to the
procedure based on the shown standards:
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.
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MG33BE02 - VLT is a registered Danfoss trademark
IEC/EN 60068-2-6: Vibration (sinusoidal) - 1970
IEC/EN 60068-2-64: Vibration, broad-band random