Danfoss AHF 010, Руководство по конструкции

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4.1.2 Mounting Requirements
The filters are available as IP20 with optional IP21/NEMA 1
upgrade kit. During installation, follow the described
recommendations for the protection rating.
•
Mount all filters vertically with the terminals at
the bottom.
•
Pay attention to the specified mounting holes
and other relevant information on the mechanical
drawings in
chapter 7.4.2 IP20 Enclosures .
•
Do not mount the filter close to other heating
elements or heat-sensitive material (such as
wood).
•
Top and bottom clearances are minimum 150 mm
(5.91 in).
•
The surface temperature of the IP20 filters does
not exceed 70
°
C (158
°
F).
•
The filter can be mounted side by side with the
frequency converter, and there is no spacing
requirement between them.
•
These requirements also apply for the IP20 units
when upgraded with the optional IP21/NEMA 1
upgrade kit.
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 filters is based on forced
cooling, and the filters are cooled by circulating air.
Therefore, ensure that air can circulate freely above and
below the filter, by observing the minimum clearance
requirements. The filters are cooled via built-in variable
speed fans, and they have ventilation channels in the
enclosure. The fans and ventilation channels provide the
required airflow to prevent the filters from overheating.
When mounting the filters in panels or other industrial
enclosures, ensure that there is a sufficient airflow through
the panel 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, also consider the heat they
generate when dimensioning the cooling of the enclosure.
Requirements for Installati...
VLT
®
Advanced Harmonic Filter AHF 005/AHF 010
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