SKS Sweden Bonfiglioli Vectron ACTIVE CUBE ACU 201 Series, Operating Instructions Manual, Page: 45 / 260

09/08
Operating Instructions ACU
43
5.4.3 Motor Connection
BONFIGLIOLI VECTRON recommends using shielded cables for the connection of the
motor and the brake resistor 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 application, the length of the motor cable and the switching
frequency.
5.4.3.1 Length of motor cables, without filter
Permissible length of motor cable without output filter
Frequency inverter unshielded cable shielded cable
0.25 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 of the product standard EN 61800-3 up to a motor
cable length of 10 m. 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 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 contains recom-
mended values for the use of output filters.
Motor cable length with output filter
Frequency inverter unshielded cable shielded cable
0.25 kW … 1.5 kW upon request upon request
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 sinus filter
Motor cables can be much longer if sinus filters are used. By conversion in sinus-
shaped currents, high-frequency portions which might limit the cable length are fil-
tered out. Also consider the voltage drop across the cable length and the resulting
voltage drop at the sinus filter. The voltage drop results in an increase of the output
current. Check that the frequency inverter can deliver the higher output current. This
must be considered in the projecting phase already.
If the motor cable length exceeds 300 m, please consult BONFIGLIOLI.
Operating Instructions ACU 43 09/08