Danfoss FCM 375 [94/106] Fcm series

Danfoss FCM 307 [94/106] Fcm series
- EN 61000-4-2 (IEC 61000-4-2): Electrostatic
discharge (ESD)
Simulation of electrostatic discharge.
- EN 61000-4-4 (IEC 61000-4-4): Fast transi-
ents, burst 5/ 50 nS
Simulation of transients caused by switching
of contactors, relays or similar devices.
- EN 61000-4-5 (IEC 61000-4-5):
Surges 1.2/ 50 μS.
Simulation of transients caused by e.g. light-
ning that strikes near an installation.
-
EN 61000-4-3: (IEC 61000-4-3):
Radio-frequency electromagnetic field. Am-
plitude modulated.
Simulation of interference caused by radio
transmission equipment.
- EN 61000-4-6: (IEC 61000-4-6):
RF common mode.
Simulation of the effect from radio-transmit-
ting equipment connected to connection ca-
bles.
-
ENV 50204:
Radio-frequency electromagnetic field. Pulse
modulated.
Simulation of interference caused by GSM
mobile phones.
General aspects of EMC emissions
For high frequency shielding, screened cables used
for Profibus, standard bus, control cables and signal
interface must in general be connected to the enclo-
sure at both ends.
General aspects of EMC immunity
If there are problems with low frequency interference
(ground loops), screened cable used for Profibus,
standard bus, control cables and signal interface can
be left open at one end.
Aggressive environments
In common with all electronic equipment, a VLT fre-
quency converter contains a large number of mechan-
ical and electronic components, all of which are
vulnerable to environmental effects to some extent.
The VLT frequency converter should 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 VLT frequency converter.
Liquids can be carried through the air and condense
in the VLT frequency converter. In addition to this, liq-
uids may cause corrosion of components and metal
parts.
Steam, oil and salt water may cause corrosion of com-
ponents and metal parts.
In such environments, equipment with enclosure rat-
ing 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 VLT
frequency converter components. Such chemical re-
actions will rapidly affect and damage the electronic
components.
NB!
Mounting VLT frequency converters in ag-
gressive environments will increase the
risk of stoppages and furthermore consid-
erably reduce the life of the converter.
Before the installation of the VLT frequency converter,
the ambient air should be checked for liquids, particles
and gases. This may be 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 in-
stallation cabinets and existing electrical installations.
One indicator of aggressive airborne gases is black-
ening of copper rails and cable ends on existing in-
stallations.
VLT
®
FCM Series
94 MG.03.H6.02 - VLT
®
is a registered Danfoss trademark

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