Danfoss VLT AHF 005

NOTICE
Do not use the capacitor disconnect feature if several
frequency converters are connected to the same lter.
4.2.2 Wiring
When wiring, also refer to Illustration 4.13.
1. Connect supply voltage to terminals X1.1, X1.2,
and X1.3.
2. Connect the frequency converter supply terminals
L1, L2, and L3 to the lter terminals X2.1, X2.2,
and X2.3.
Wiring recommendations for paralleling of frequency
converters
If connecting several frequency converters to 1 harmonic
lter, the connection method is similar to the connection
described above. Connect the supply terminals L1, L2, and
L3 of the frequency converters to the lter terminals X2.1,
X2.2, and X2.3.
NOTICE
Use cables complying with local regulations.
Wiring recommendations for paralleling of lters
If the mains input current of the frequency converter
exceeds the nominal current of the largest harmonic lter,
several harmonic lters can be paralleled to achieve the
necessary current rating, see Table 7.1.
1. Connect supply voltage to terminals X1.1, X1.2,
and X1.3 of the lters.
2. Connect the frequency converter supply terminals
L1, L2, and L3 to the lters terminals X2.1, X2.2,
and X2.3.
4.2.3 Overtemperature Protection
The VLT
®
Advanced Harmonic Filters AHF 005/AHF 010 are
all equipped with a galvanically isolated switch (PELV). The
switch is closed under normal operating conditions. If the
lter is overheated, the switch opens.
Each lter contains 3 thermal switches mounted in series
in each inductor group. At temperatures above 140 °C
(284 °F), the switches open.
NOTICE
It is mandatory to use the integrated temperature switch
to prevent damage of the lter caused by overtem-
perature. To prevent lter damage, perform an
immediate stop or a controlled ramp down within
maximum 30 s.
NOTICE
POSSIBLE INSUFFICIENT AIRFLOW
If the switch activates repeatedly in IP00 installations, it
is probably caused by insucient airow through the
lter.
•
Evaluate the airow and the installation
conditions.
•
Make the required changes to provide proper
cooling.
4.2.3.1 Programming of Digital Inputs for
Overtemperature Protection
The following describes the most commonly used
programming examples. For more details, refer to
chapter 6 Programming.
Example 1
1. Connect terminal A of the harmonic lter to
terminal 12 or 13 (voltage supply digital input,
24 V) of the frequency converter.
2. Connect terminal B to terminal 27.
3. Program the digital input terminal 27 to Coast
Inverse.
If an overtemperature is detected, the frequency converter
coasts the motor and thus unloads the lter.
Example 2
1. Connect terminal A of the harmonic lter to
terminal 12 or 13 (voltage supply digital input,
24 V DC) of the frequency converter.
2. Connect terminal B to terminal 33.
3. Set parameter 1-90 Motor Thermal Protection.
4. Set parameter 1-93 Thermistor Resource.
NOTICE
The maximum rating of the temperature switch is
250 V AC and 2 A.
Requirements for Installati... Design Guide
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