Danfoss AHF 010 Design Manual page 24

Requirements for Installati...
Fan concept
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The VLT Advanced Harmonic Filters AHF 005/AHF 010 use variable speed fans for cooling. The fans are supplied from mains
supply and are mounted as either internal or external built-in fans. The external fans have larger dimensions. See
chapter 7.4 Mechanical Dimensions.
There are 2 different fan types, see Illustration 4.6 and Illustration 4.7:
•
Internal fan: Standard fan mounted inside the filter enclosure.
•
External fan: Standard fan mounted outside the filter enclosure.
4 4
Illustration 4.6 Fan Concept, Internal Fan
NOTICE
IP21/NEMA 1 UPGRADE KIT
An IP21/NEMA 1 upgrade kit is available for the VLT
chapter 5.3.1 IP21/NEMA 1 Upgrade Kit for further details.
22
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VLT Advanced Harmonic Filter AHF 005/AHF 010
Illustration 4.7 Fan Concept, External Fan
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Advanced Harmonic Filter AHF 005/AHF 010. See
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