ABB ACQ550-x1-06A6-2 User Manual page 280

280
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.
Frame
size
R1
R2
R3
R4
R5
R6
1
See the new terms in section
2
12 kHz switching frequency is not available.
3
Not tested.
Sine filters further extend the cable lengths.
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:
Requirements
R1 frame size,
8 kHz fsw,
Category C2,
150 m (490 ft) cable
Technical data
Maximum cable length for 400 V drives
EMC limits
Second environment
1
(category C3 )
1 kHz 4 kHz 8 kHz
m ft m ft m
300 980 300 980 300 980 300 980 300 980 300 980 100 330 100 330 150 490
300 980 300 980 300 980 300 980 100 330 30
300 980 300 980 300 980 300 980 75 245 75 245 200 660 100 330 250 820
300 980 300 980 300 980 300 980 75 245 75 245 200 660 100 330 300 980
100 330 100 330 100 330 100 330 100 330 100 330 300 980 150
3
100 330 100 330
IEC/EN 61800-3 (2004) Definitions
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.
First environment
1
(category C2 )
1 kHz 4 kHz
ft m ft m ft m
3
100 330 100 330
Checking and conclusions
ACQ550-U1 User's Manual
Operational limits
Basic unit
8 kHz 1/4 kHz 8/12 kHz
ft m ft m
98 200 660 100 330 250 820
2
490
2
3 3
300 980 150 490
on page 301.
With
du/dt
filters
ft m ft
2
300 980
2
300 980