Danfoss VLT AHF 005

4 Requirements for Installation
4.1 Mechanical Mounting
4.1.1 Safety Requirements of Mechanical
Installation
NOTICE
Observe the lter weight and ensure that proper lifting
equipment is used.
NOTICE
When installing the lter, use the lifting eyes on both
sides to lift the lter.
4.1.2 Mounting Requirements
The lters are available in IP00 and IP20. During instal-
lation, follow the described recommendations for both IP
ratings.
•
Mount all
lters vertically with the terminals at
the bottom.
•
Do not mount the lter close to other heating
elements or heat-sensitive material (such as
wood).
IP00
•
The surface temperature of the IP00 lters can
exceed 70 °C (158 °F), and a hot surface warning
label is placed on the lter.
•
To cool IP00 lters, use separate fans.
•
Observe ventilation and cooling requirements.
•
Ensure that the required airow passes through
the lter and not only the cabinet, see
chapter 4.1.4 Ventilation and Cooling Requirements
and chapter 4.2.3 Overtemperature Protection.
IP20
•
Top and bottom clearances are minimum 150 mm
(5.91 in).
•
The surface temperature of the IP20 lters does
not exceed 70 °C (158 °F).
•
The lter can be mounted side by side with the
frequency converter, and there is no spacing
requirement between them.
4.1.3 Recommendations for Installation in
Industrial Enclosures
To avoid high frequency noise coupling, keep a minimum
distance of 150 mm (5.91 in) to:
•
Mains supply wires.
•
Motor wires of frequency converter.
•
Control wires and signal wires (voltage range
<48 V).
To obtain low impedance HF connections, grounding,
shielding, and other metallic connections (for example
mounting plates and mounted units) should have a surface
as large as possible to metallic ground. Use grounding and
potential equalization wires with a cross-section as wide as
possible (minimum 10 mm
2
(8 AWG)) or thick grounding
tapes. Use copper or tinned copper shielded wires only, as
steel shielded wires are not suitable for high frequency
applications. Connect the shield with metal clamps or
metal glands to the equalization bars or PE connections.
Always equip inductive switching units such as relay and
magnetic contactor with varistors, RC circuits, or suppressor
diodes.
4.1.4 Ventilation and Cooling Requirements
The compact design of the lters is based on forced
cooling, and the lters are cooled by circulating air.
Therefore, ensure that air can circulate freely above and
below the lter.
IP20 lters are cooled by built-in fans, and they have
ventilation channels in the enclosure. The fans and
ventilation channels provide the required airow to
prevent the lters from overheating.
IP00
lters are cooled by forced air supplied by separate
fans. The fans are not part of the delivery. It is the respon-
sibility of the installer to provide and install the fans. To
avoid false airow, it is sometimes also necessary to install
air baes to control the airow.
Requirements for Installati...
VLT
®
Advanced Harmonic Filter AHF 005/AHF 010
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