Danfoss VLT AHF005, Руководство по конструкции

Страница: 30 / 59

6 How to Install
6.1 Mechanical Mounting
6.1.1 Safety Requirements of Mechanical
Installation
NOTE
Please observe the filter weight and ensure that proper
lifting equipment is used.
NOTE
When installing the filter use the lifting eyes on both sides to
lift the filter.
NOTE
Do not use other parts (terminals, enclosures, etc.).
6.1.2 Mounting
The filters are available in IP00 and IP20 and for both IP
ratings the following guidance must be followed during
installation.
•
All filters must be mounted vertically with the
terminals at the bottom
•
Do not mount the filter close to other heating
elements or heat sensitive material (such as wood)
IP00
•
The surface temperature of the IP00 filters can
exceed 70
°
C and a hot surface warning label is
placed on the filter
IP20
•
Top and bottom clearance is minimum 150mm
•
The surface temperature of the IP20 filters does not
exceed 70
°
C
•
The filter can be side-by-side mounted with the
frequency converter and there is no requirement
for spacing between then.
6.1.3 Recommendations for Installation in
Industrial Enclosures
To avoid high frequency noise coupling keep a minimum
distance of 150mm (5.91 inches) to
- mains/supply wires
- motor wires of frequency converter
- control- and signal wires (voltage range < 48V)
To obtain low impedance HF-connections, grounding,
screening and other metallic connections (e.g. mounting
plates, mounted units) should have a surface as large as
possible to metallic ground. Use grounding and potential
equalisation wires with a cross section as large as possible
(min. 10mm
² ) or thick grounding tapes. Use copper or tinned
copper screened wires only, as steel screened wires are not
suitable for high frequency applications. Connect the screen
with metal clamps or metal glands to the equalisation bars
or PE-connections.
Inductive switching units (relay, magnetic contactor etc.)
must always be equipped with varistors, RC-circuits or
suppressor diodes.
6.1.4 Ventilation
The filters are cooled by means of air circulation.
Consequently the air needs to be able to move freely above
and below the filter.
When mounting the filters in panels or other industrial
enclosures it must be ensured that there is a sufficient
airflow through the filter to reduce the risk of overheating
the filter and the surrounding components.
If other heat sources (such as frequency converters) are
installed in the same enclosure, the heat they generate also
needs to be taken into account when dimensioning the
cooling of the enclosure.
The filters have to be mounted on a wall in order to guide air
through the gap between the wall and the filter. In instal-
lations (e.g. panels) where the filter is mounted on rails, the
filter will not be sufficiently cooled because of false airflow
and therefore a back plate can be ordered separately. See
following illustration.
How to Install AHF005/010 Design Guide
MG.80.C4.02 - VLT
®
is a registered Danfoss trademark 29
6 6