VLT
®
FCM Series
All about FCM
300
-
EN 61000-3-2:
Limits for harmonic current
emissions (equipment input current
≥
16 A)
-
EN 61000-3-4:
Limits for harmonic current
emissions (equipment input current
≤
16 A)
Basic standards, immunity
-
EN 61000-2-4 (IEC 61000-2-4):
Compatibility levels
Simulation of voltage and frequency fluctuations,
harmonics and commutation notches on
the power line.
-
EN 61000-4-2 (IEC 61000-4-2):
Electrostatic
discharge (ESD)
Simulation of electrostatic discharge.
-
EN 61000-4-4 (IEC 61000-4-4):
Fast
transients, 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
µ
S.
Simulation of transients caused by e.g. lightning
that strikes near an installation.
-
EN 61000-4-3: (IEC 61000-4-3):
Radio-frequency electromagnetic field.
Amplitude 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-transmitting
equipment connected to connection cables.
-
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 enclosure 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
frequency converter contains a large number of
mechanical 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, 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 VLT frequency converter components.
Such chemical reactions will rapidly affect and
damage the electronic components.
NB!:
Mounting VLT frequency converters in
aggressive environments will increase the risk
of stoppages and furthermore considerably
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
installation cabinets and existing electrical installations.
One indicator of aggressive airborne gases is blackening
of copper rails and cable ends on existing installations.
MG.03.H3.02 - VLT is a registered Danfoss trademark
93