ABB ACQ550-x1-06A6-2 - Page 280

280 ACQ550-U1 User’s Manual
Technical data
Motor cable length for 400 V drives
The table below shows the maximum motor cable lengths for 400 V drives with
different switching frequencies. Examples for using the table are also given.
Under heading “Operational limits”, the “Basic unit” columns define the cable lengths
with which the basic drive unit works without problems within the drive specification,
without installing any further options. Column “With du/dt filters” defines the cable
lengths when an external du/dt filter is used.
The columns under heading “EMC limits” show the maximum cable lengths with
which the units have been tested for EMC emissions. The factory guarantees that
these cable lengths meet the EMC standard requirements.
If external sine filters are installed, longer cable lengths can be used. With sine filters
the limiting factors are the voltage drop of the cable, which has to be taken into
account in engineering, as well as the EMC limits (where applicable).
The default switching frequency is 4 kHz.
WARNING! Using a motor cable longer than specified in the table above may cause
permanent damage to the drive.
Examples for using the table:
Maximum cable length for 400 V drives
Frame
size
EMC limits Operational limits
Second environment
(category C3
1
)
First environment
(category C2
1
) Basic unit
With
du/dt
filters1 kHz 4 kHz 8 kHz 1 kHz 4 kHz 8 kHz 1/4 kHz 8/12 kHz
m
ft m ft m ft m ft m ft m ft m ft m ft m ft
R1 300 980 300 980 300 980 300 980 300 980 300 980 100 330 100 330 150 490
R2 300
980 300 980 300 980 300 980 100 330 30 98 200 660 100 330 250 820
R3 300 980 300 980 300 980 300 980 75 245 75 245 200 660 100 330 250 820
R4 300 980 300 980 300 980 300 980 75 245 75 245 200 660 100 330 300 980
R5 100 330 100 330 100 330 100 330 100 330 100 330 300 980 150
2
490
2
300 980
R6 100
330 100 330
3 3
100 330 100 330
3 3
300 980 150
2
490
2
300 980
1
See the new terms in section IEC/EN 61800-3 (2004) Definitions on page 301.
2
12 kHz switching frequency is not available.
3
Not tested.
Sine filters further extend the cable lengths.
Requirements Checking and conclusions
R1 frame size,
8kHz fsw,
Category C2,
150 m (490 ft) cable
Check operational limits for R1 and 8 kHz -> for a 150 m (490 ft)
cable a du/dt filter is needed.
Check EMC limits -> EMC requirements for Category C2 are met
with a 150 m (490 ft) cable.