Operating Instructions ACTIVE06/07 37
06/07 Operating Instructions ACTIVE 37
5.4.3 Motor connection
BONFIGLIOLI VECTRON recommends shielded cable for the motor connection to the
frequency inverter. The shield is to be connected to PE potential properly, i.e. with
good conductivity, on both sides. The control, mains and motor lines must be kept
physically separate from one another. The user must comply with the applicable limits
stipulated in the relevant national and international directives as regards the applica-
tion, the length of the motor cable and the switching frequency.
5.4.3.1 Motor cable length, without filter
Permissible length of motor cable without output filter
Frequency inverter unshielded cable shielded cable
0.55 kW … 1.5 kW 50 m 25 m
1.85 kW … 4.0 kW 100 m 50 m
5.5 kW … 9.2 kW 100 m 50 m
11.0 kW … 15.0 kW 100 m 50 m
18.5 kW … 30.0 kW 150 m 100 m
37.0 kW … 65.0 kW 150 m 100 m
75.0 kW … 132.0 kW 150 m 100 m
The specified lengths of the motor cables must not be exceeded if no output filter is
installed.
Note: The frequency inverters ≤ 9.2 kW with integrated EMC filter comply with
the emission limits stipulated in EN 61800-3 if the motor cable is not
longer than 10 m. The frequency inverters ≤ 9.2 kW of the construction
size 3 with integrated EMC filter comply with the emission limits stipulated
in EN 61800-3 if the motor cable is not longer than 20 m Customer-
specific requirements can be met by means of an optional filter.
5.4.3.2 Motor cable length, with output filter dU/dt
Longer motor cables can be used after taking appropriate technical measures, e.g.
use of low-capacitance cables and output filters. The following table includes standard
values if an output filter is used.
Permissible length of motor cable with output filter
Frequency inverter unshielded cable shielded cable
0.55 kW … 1.5 kW on inquiry on inquiry
1.85 kW … 4.0 kW 150 m 100 m
5.5 kW … 9.2 kW 200 m 135 m
11.0 kW … 15.0 kW 225 m 150 m
18.5 kW … 30.0 kW 300 m 200 m
37.0 kW … 65.0 kW 300 m 200 m
75.0 kW … 132.0 kW 300 m 200 m
5.4.3.3 Motor cable length, with sine filter
Longer motor cables can be used if sine filters are installed. The high-frequency cur-
rent components will be filtered out which results in smoothed current and allows
longer motor cables. Take the voltage drop at the wire and the sine filter into account.
The voltage drop causes an increase of the output current. Verify that the increased
output current can be achieved by the frequency inverter. Consider this for the engi-
neering.
If the motor cable is longer than 300 m please contact the BONFIGLIOLI service.
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