20 Rockwell Automation Publication 750-RM003A-EN-P - April 2018
Chapter 1 Selection Considerations
Power and Control Bus Bar Ratings
DC power and control circuit bus bars may not be available, standard, or
optional for the PowerFlex 700AFE or PowerFlex 755TM bus supply. See
Table 2
to identify the existence and rating of bus bars.
The DC power bus bars and control power bus bars within the IP21/IP54
enclosed PowerFlex 755TM bus supplies are not mechanically or electrically
compatible with the bus bars in the IP21 Rittal or IP20 2500 MCC enclosed
PowerFlex 700AFE bus supplies. A transition enclosure may be required if the
new bus supply must interface electrically and mechanically with existing
common bus inverter power and control bus bars. Contact an authorized
Rockwell Automation Distributor specialist, Solution Partner, Recognized
System Integrator, or Rockwell Automation account manager to discuss
engineered solutions for these AFE migrations.
Table 2 - Power and Control Bus Bar Rating Comparison
Description PowerFlex 700AFE Bus Supply PowerFlex 755TM Bus Supply
DC Power Bus Bars • IP21 Rittal, enclosure code (A);
not applicable
• IP20 2500 MCC, enclosure code
(W); standard CENTERLINE™
DC bus, frame 10, 1250 A DC
frame 13, 3000 A DC
(s) frames 8…10; 3000 A DC
(s) frames 11…12; 4700 A DC
(o) frames 8…10; 4700 A DC,
specify power option code (-P46)
Control Power Bus Bars — (s) Primary control 240V AC, 1 PH, 100 A
(s) Auxiliary 24V DC, 100 A
(s) User 120/240V AC, 1 PH, 100 A
IMPORTANT PowerFlex 755TM common bus inverters that are used with the PowerFlex
755TM bus supply must have the same DC bus bar rating as the bus supply.
PowerFlex 755TM 3000 A and 4700 A bus bars are not compatible with each
other. If any 4700 A bus bars are used, then frames 8…10 drives and bus
supplies must have the 4700 A DC bus option (-P46) installed. See the Drives
in Common Bus Configurations with PowerFlex 755TM Bus Supplies
application techniques, publication DRIVES-AT005
, for detailed information
regarding PowerFlex 755TM DC bus bar compatibility.
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