ABB ACS880-04 drive modules, Application Manual

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Planning – additional instructions 31
4
Planning – additional
instructions
Contents of this chapter
This chapter contains some additional instructions for planning a common DC system.
Requirements for the AC input connection
See the drive hardware manual for the electric power network specification of the drive.
Supply all drives which you connect to the AC power line from the same transformer. All
drives must have equal supply-side impedance. The supply-side impedance is an
important parameter which influences the current distribution.
Constructing the DC link
If the system consists of more than two drives, construct either common DC bus bars or
common DC terminals for the whole system. Connect the DC cabling of every drive to this
common connection point. Do not use the DC terminals of one of the drives for this
purpose, nor chain the DC link from one drive to another. This ensures that the drives
terminals do not overheat.