FC 300 Design Guide
Introduction to FC 300
" Aggressive Environments
An adjustable frequency drive contains a large number of mechanical and electronic components.
All are to some extent vulnerable to environmental effects.
The adjust able frequenc y drive should not be installed in environments with airborne
liquids,particles,orgasescapableofaffecting and damaging the electronic components.
Failure t o take the necessary p rotective measure s increases the risk of stoppages,
thus reducing the life of the adjustable frequency drive.
L
iquids can be carried through the air and condense in the adjustable frequency drive 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 55. As
an extra protection, coated printed circuit boards can be ordered as an option.
Airborne P
articles such as dust may cause mechanical, electrical, or thermal f ailu
re in the adjustable
frequency drive. A typical indicator of excessive levels of airborne particles is dust particles
around the adjustable frequency drive 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 g
ases such as sulfur, nitrogen, and chlorine
compounds w ill cause chemical processes on the adjustable frequency drive components.
Such chemical reactions will rapidly affect and damage the electronic components. In
such environments, mount the eq uipm ent in a cabinet with fresh air ventilation, keeping
aggressive gases away from the adjustable frequency
drive.
An extra protection in such areas is a coating of the printed circuit boards, which can be ordered as an option.
NOTE
Mounting adjustable frequency drives in aggressive environments increases the risk of
stoppages and considerably reduces the life of the
drive.
Before installing the adjustable frequency
drive, check the ambie n t air for liquids, particles, and g ases.
This is d one by observing existing installa tions in this environment. Typ ical indicators of harmful
airborne liquids are water or oil on m etal parts, or corrosion of metal parts.
Excessive dust particle levels are often found on installation cabinets and existing electri cal installations. One
indicator of aggressive airborne ga
ses is blackening of copper rails and cable ends on existing installations.
" Vibration and Shock
The adjustabl e frequency drive has been
tested according to a procedure based on
the shown standards:
The adjustable frequ
ency drive complies with
requirements that exist for units mounted on the
wallsandfloorsofproductionpremises,aswell
as in panels bolted
to walls or floors.
IEC/EN 60068-2-6: Vibration (sinusoidal) - 1970
IEC/EN 60068-2-64: Vibration, broad-band
random
" Control Principle
An adjust able frequency drive rectifi es AC voltage from line into DC voltage, after which this DC
voltage is converted into an AC current with a variable am pl itude and frequency.
16
MG.33.B6.22 - VLT is a registered Danfoss trademark
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