Typical Installation In A Panel Or Other Enclosures - Danfoss VLT AHF 005 Operating Instructions Manual

Typical installation in a panel or other enclosures

To avoid high frequency noise coupling keep a mini-
mum distance of 150 mm (5.91 inches) to:
a) mains/supply wires
b) motor wires of frequency converter
c) control- and signal wires (voltage range <
48 V)
To obtain low resistive HF-connections, grounding,
screening and other metallic connections (e. g. mount-
ing plates, mounted units) should have a surface as
large as possible to metallic ground. Use grounding
1. Panel
2. Mains supply wire
3. Motor wiring
4. Control wiring
5. Wiring between harmonic filter and frequency
converter
6. Mains supply wire of filter module
7. Mounting plate (common star point)
8. Potential equalisation
9. Filter module AHF 0xx
10. Mains connection
11. PLC
12. Frequency converter
13. Mains fuses
14. Mains circuit breaker
®
MG.80.B5.02 - VLT is a registered Danfoss trademark
AHF 005/010
and potential equalisation wires with a cross section
as large as possible (min. 10mm²) or thick grounding
tapes.
Use copper or tinned copper screened wires only, as
steel screened wires are not suitable for high frequen-
cy applications. Connect the screen with metal clamps
or metal glands to the equalisation bars or PE-con-
nections.
Inductive switching units (relay, magnetic contactor
etc.) must always be equipped with varistors, RC-cir-
cuits or suppressor diodes.
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