Rockwell Automation Publication 750-RM003A-EN-P - April 2018 41
Selection Considerations Chapter 1
Cross Reference Guides
Use Table 16 through Table 19 to compare power, current, and overload
capacity to migrate your bus supply. Because of the numerous migration
options, we provide these tables as an example of how to cross-reference your
converter rating to an equivalent PowerFlex 755TM bus supply converter.
Shaded rows in the tables indicate that, unless noted otherwise, a suitable
PowerFlex 755TM bus supply migration product may be available.
Follow these steps when using the tables.
1. Find your existing voltage class, overload rating (ND or HD), catalog
number, and number of units in parallel.
2. Use the row in the Electrical Rating Cross-reference table with your
PowerFlex 700AFE bus supply to see the catalog number and ratings of a
suitable migration solution.
3. Note the catalog number of the PowerFlex 755TM bus supply.
4. See the Dimensional Cross Reference Tables (Table 20
through
Table 23
) to see if the PowerFlex 755TM bus supply is dimensionally
compatible.
ATTENTION: There may be cases where the external DC bus capacitance of
DC input common bus inverters and external capacitor banks may exceed the
maximum external capacitance specification of the PowerFlex 755TM bus
supply converter. The maximum external DC bus capacitance of the
PowerFlex 755TM bus supply could be less than an equivalent rated
PowerFlex 700AFE bus supply. Exceeding the maximum external DC bus
capacitance can damage the bus supply circuits. See the applicable sections
of publication DRIVES-AT005
.
Where the PowerFlex 755TM bus supply maximum external DC bus
capacitance specification is less than the equivalent PowerFlex 700AFE bus
supply, the following Electrical Rating tables will indicate the possibility with
footnotes in the Electrical Ratings cross reference tables.
ATTENTION: Review the types of DC input drives applied to the PowerFlex
755TM bus supply to ensure proper precharging and interlocking is
implemented. Kinetix servo drives and some PowerFlex drives do not have
built in precharging circuits, so extreme care must be exercised to maintain
safe and reliable operation of the DC bus system. See all applicable sections
of the Drives in Common Bus Configurations with PowerFlex 755TM Bus
Supplies application technique, publication DRIVES-AT005
.
To Next Page
Loading...
Need help?
General
