ABB ACH550-01 User Manual page 397

ACH550 User's Manual
Motor cable length
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.
Second environment
(category C3
Frame
size 1 kHz 4 kHz 8 kHz 1 kHz 4 kHz 8 kHz 1/4 kHz
R1 300 300
R2 300 300
R3 300 300
R4 300 300
R5 100 100
R6 100 100
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.
Technical data
Maximum cable lengths (400 V)
EMC limits
First environment
1
) (category C2
300 300 300
300 300 100
300 300 75
300 300 75
100 100 100
3
100 100
IEC/EN 61800-3 (2004) Definitions
Operational limits
1
) Basic unit
8/12
kHz
300 100 100
30 200 100
75 200 100
75 200 100
2
100 300 150
2
3
300 150
on page 413.
With
du/dt
filters
150
250
250
300
300
300
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