Rockwell Automation Publication 750-RM003A-EN-P - April 2018 27
Selection Considerations Chapter 1
The general recommendation is that all connected DC input common bus
inverters have their respective DC common mode (PE-B1) jumpers in the
disconnected (OUT) position when powered by a PowerFlex 755TM bus
supply. See the applicable sections of publication DRIVES-AT005
.
Circuit Protection
Branch circuit protection must be provided in accordance with all applicable
electrical codes (CEC/CSA/NEC) and any additional or equivalent local
electrical installations codes.
User-supplied protective device (fuse and circuit breaker) sizing may be
different between equivalent PowerFlex 700AFE and PowerFlex 755TM bus
supplies. Verify that the existing protective devices are suitable for use with the
selected PowerFlex 755TM bus supply. It may be necessary to change the types
and ratings of the existing user-supplied protective devices to be compatible
with the PowerFlex 755TM bus supply.
See the fuse and circuit breaker ratings selection tables in publications 20Y-
UM001 and 750-TD100, to compare requirements for PowerFlex 700AFE
and PowerFlex 755TM external protective devices
IMPORTANT There could be multiple PE-B1 jumpers, depending on the frame size of the
PowerFlex 755TM bus supply. Each IGBT power supply roll-in assembly has a
separate PE-B1 jumper. All PE-B1 jumpers MUST be in the same position.
IMPORTANT It is important to consider the EMC requirements and grounding
configuration of the power source. Certain power source grounding
configurations may require removal of the PE-B1 power jumpers. Contact an
Authorized Rockwell Automation Distributor specialist, Solution Partner,
Recognized System Integrator, or Rockwell Automation account manager to
discuss EMC, grounding, and power jumper settings if your system does not
match Rockwell Automation recommendations.
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