16 Rockwell Automation Publication 750-RM003A-EN-P - April 2018
Chapter 1 Selection Considerations
About the PowerFlex 755TM
Bus Supply
The PowerFlex 755TM bus supply, catalog code 20J…, is available in five
different power rating frame sizes (frames 8, 9, 10, 11, and 12) and three
different packaging methods:
• IP00 open
• IP21 Rittal
• IP54 Rittal
Paralleling of PowerFlex 755TM bus supplies is not supported. The PowerFlex
755TM bus supply is a fully regenerative, low harmonic active front end
converter that can easily be integrated with PowerFlex 750-Series and
PowerFlex 755TM IP20/IP54 enclosed common bus inverters. The enclosure
design and power/control bus bar systems in the PowerFlex 755TM bus supply
are mechanically and electrically compatible with similarly enclosed PowerFlex
750-Series and PowerFlex 755TM DC input common bus inverters.
IMPORTANT PowerFlex 755TM enclosures and bus systems are not directly compatible
with any existing PowerFlex 700AFE enclosures and connected inverter
enclosures. In almost all cases, it is necessary to employ a transition cabinet
between the existing drive enclosures and the new PowerFlex 755TM bus
supply enclosure. Transition cells are expected to be available from Rockwell
Automation at a later date.
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