Harsh Environments - Danfoss FCM305 56 Instruction Manual

Harsh Environments

In common with all electronic equipment, a VLT
adjustable frequency drive contains a large number
of mechanical and electronic components, all of
which are vulnerable to environmental effects to
some extent.
The FCM 300should not therefore 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 unit.
Liquids can be carried through the air and
condense in the FCM 300. In addition to this, liquids
may cause corrosion of components and metal
parts.
Steam, oil and salt water may cause corrosion of
components and metal parts.
In such environments, equipment with enclosure
rating ≥ IP 54 is recommended.
In environments with high temperatures and
humidity, corrosive gases such as sulphur, nitrogen
and chlorine compounds will cause chemical
processes on the FCM 300 components. Such
chemical reactions will rapidly affect and damage
the electronic components.
17-6
FCM 300 Series
NOTE!
Mounting FCM 300 units in harsh environments will
increase the risk of stoppages and furthermore
considerably reduce the life of the converter.
Before the installation of the FCM 300, the ambient
air should be checked for liquids, particles and
gases. This may be done by observing existing in-
stallations 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 in-
stallation cabinets and existing electrical installations.
One indicator of aggressive airborne gases is
blackening of copper rails and cable ends on
existing installations.
MG.03.B6.2G - VLT is a registered Danfoss trademark