NB!
If several VLT frequency converters 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 VLT frequency converters.
Filters in parallel
If the mains 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 wired in parallel. The rating of the filter becomes the sum of the individual current ratings.
Power wiring size
Enclosure
Max. cable size mm
2
AWG
Type
Nom. Fix Torque
[Nm]
B
16
6
Connector
2
C and D
50
1
Connector
6
E
*
*
Bus bars
25
F, G and H
*
*
Bus bars
25
Table 4.2: Power wiring size
Enclosure
Max. cable size mm
2
AWG
Type
Nom. Fix Torque
[Nm]
B - H
4
Connector
0.6
Table 4.3: Overheat contactor (copper)
NB!
Please consult the drive design guide to find the maximum allowed cable lenght between a terminal protection (PTC) and the drive input.
Enclosure
Max. cable size mm
2
AWG
Type
Nom. Fix Torque
B
4
10
Connector
0.6 Nm
C and D
16
6
Connector
2 Nm
E, F, G and H
50
1
Connector
6 Nm
Table 4.4: Capacitor disconnect (copper)
NB!
The cable length between the filter and the capacitor disconnect contactor has to be as short as possible in order to reduce the impedance influence
of the cable. A maximum cable lenght of 2 meters are allowed between filter and contactor.
* Power wiring used for connection of the filter AHF 005 and AHF 010 in enclosure size E, F and G must be terminated with cable lugs that can be attached
to the input and output bus bars terminals. This type of termination imposes no specifications of the minimum and maximum cable size suitable for
connection. Power terminal details regarding the bus bars can be found in the figures below.
NB!
Do not fix the nut without using a second wrench for the screw.
If this is not observed, it might be possible to tear out the terminal when fixing the nut.
AHF 005/010 Operating Instructions
4 Installation
MG.80.C2.02 - VLT
®
is a registered Danfoss trademark
17
4
