Danfoss VLT AHF 005 Design Manual page 24

Requirements for Installati...
Fan concept IP20
The IP20 versions of the VLT
AHF 005/AHF 010 use fans for cooling. The fans are
supplied from mains supply and are mounted as either
internal or external built-in fans.
The 690 V AHF filters are available in an extended input
voltage range of 500–690 V, which requires a special fan.
This fan has a built-in fan control circuitry matching the
4 4
input voltage range. When mounting 690 V filters, observe
the larger mechanical dimensions, see
chapter 7.2.7 Mechanical Dimensions for further details.
There are 4 different fan types, see Illustration 4.4 to
Illustration 4.7:
•
Internal fan type 1: Standard fan mounted inside
the filter enclosure.
•
External fan type 1: Standard fan mounted
outside the filter enclosure.
•
Internal fan type 2: Special fan mounted inside
the filter enclosure. The fan supply circuitry is
outside the enclosure. For 690 V only.
•
External fan type 2: Special fan mounted outside
the filter enclosure. The complete fan unit is
outside the filter enclosure. For 690 V only.
Illustration 4.4 Fan Concept, Internal Fan 1
22
®
VLT Advanced Harmonic Filter AHF 005/AHF 010
®
Advanced Harmonic Filters
Danfoss A/S © 10/2016 All rights reserved.
Illustration 4.5 Fan Concept, Internal Fan 2
Illustration 4.6 Fan Concept, External Fan 1
Illustration 4.7 Fan Concept, External Fan 2
MG80C502