Over Temperature Contactor - Danfoss AHF 005 Instruction Manual

NB!:
If several FC's are to be connected to
the same filter, the harmonic filter must
be sized according to the sum of the
calculated input current to the FC's.
Paralleling of filters
If the line input current of the frequency converter
exceeds the nominal current of the largest harmonic
filter, several harmonic filters can be paralleled to
achieve the necessary rating. Supply voltage must
be connected to the terminals X1.1, X1.2 and
X1.3 of the filters. The frequency converter supply
terminals L1, L2 and L3 must be connected to the
filter modules terminals X2.1, X2.2 and X2.3.
NB!:
Filters of different current ratings can be
paralleled. The rating of the filter becomes the
sum of the individual current ratings.

Over temperature contactor

The Danfoss harmonic filter AHF 005 and AHF 010 is equipped with a galvanic isolated contactor that is
closed under normal operating conditions and open if the filter is overheated. This contactor can be used for
preventing damages to the filter caused by over temperature as shown in the following example.
NB!:
The maximum rating of the over temperature
contactor is 250V AC and 10A.
MG.80.B2.02 - VLT is a registered Danfoss trademark
AHF 005/010
Use cables complying with local regulations.
Example: Connect terminal A of the harmonic filter to
terminal 12 or13 (voltage supply digital input, 24V)
of the Danfoss frequency converter and terminal
B to terminal 27 (digital input "Coast Inverse") the
frequency converter will let go of the motor (coasting)
and thereby unload the filter if a over temperature is
detected.
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