300 ACS550-02/U2 User’s Manual
Technical data
Motor connection
Motor cable length
The table below shows the maximum motor cable lengths for 1 or 4 kHz 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).
WARNING! Using a motor cable longer than specified in the table above may cause
permanent damage to the drive.
Motor connection specifications
Voltage (U
2
) 0…U
1
, 3-phase symmetrical, U
max
at the field weakening point
Frequency 0…500 Hz
Frequency
resolution
0.01 Hz
Current See section Ratings on page 293.
Power limit 1.5 · P
hd
Field weakening
point
10…500 Hz
Switching
frequency
Selectable: 1, 4 kHz
Cable
temperature
rating
70 °C (158 °F) rating minimum.
Maximum motor
cable length
See section Motor cable length below.
Frame
size
EMC limits Operational limits
IEC/EN 61800-3
Second environment
(category C3
1
)
IEC/EN 61800-3
First environment
(category C2
1
)
Basic limits With du/dt
filters
m
ft m ft m ft m ft
R7 100
330 100 330 300 980 300 980
R8 100
330 - -300980 300 980
1
See the new terms in section IEC/EN 61800-3 (2004) Definitions on page 306.
Sine filters further extend the cable lengths.
00577999.xls A
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