Danfoss VLT HVAC Drive FC 100 Series, Руководство по конструкции

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connectors, tracks and safety-related circuitry caused by
foreign objects.
Liquids 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
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 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 54/55 or a cabinet for IP 00/IP 20/TYPE
1 equipment.
In environments with high temperatures and humidity,
corrosive gases such as sulfur, nitrogen and chlorine
compounds will 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
equipment 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 consid-
erably reduces the life of the drive.
Before installing the Adjustable frequency drive, 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 the 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.
2.5 Vibration and shock
The Adjustable frequency drive has been tested according
to the procedure based on the shown standards:
The Adjustable frequency drive 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.
•
IEC/EN 60068-2-6: Vibration (sinusoidal) - 1970
•
IEC/EN 60068-2-64: Vibration, broad-band random
2.6 Safe Stop
2.6.1 Electrical terminals
The Adjustable frequency drive can perform the safety
function
Safe Torque Off (As defined by draft CD IEC
61800-5-2) or Stop Category 0 (as defined in EN 60204-1).
It is designed and approved suitable for the requirements
of Safety Category 3 in EN 954-1. This functionality is called
Safe Stop. Prior to integration and use of Safe Stop in an
installation, a thorough risk analysis on the installation
must be carried out in order to determine whether the
Safe Stop functionality and safety category are appropriate
and sufficient.
WARNING
In order to install and use the safe stop function in
accordance with the requirements of Safety Category 3 in
EN 954-1, the related information and instructions in the
relevant Design Guide must be followed! The information
and instructions of the Instruction Manual are not
sufficient for a correct and safe use of the safe stop
functionality!
Introduction to VLT® HVAC D...
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HVAC Drive Design Guide
2-4 MG11BB22 - VLT
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