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Rockwell Automation Publication 35-UM001A-EN-P - May 2022
Chapter 2 Install the Armor PowerFlex Drive
Unshielded Motor Cable
An unshielded motor cable is allowed for installations that do not require EMC
compliance. The use of cables without shielding is generally acceptable for
installations where drive electrical noise does not interfere with the operation
of other devices such as: communication cards, photoelectric switches, weigh
scales, and others. Be certain the installation does not require shielded cable to
meet specific EMC standards for CE, RCM, FCC and any other applicable
standards. The type of installation determines the cable specifications.
Power Considerations
The following items should be considered for the power circuit design.
Branch Circuit Protection Requirements
When using ArmorConnect three-phase power media or fixed wire (such as
cord or conduit), with the Armor PowerFlex drive, protective devices that meet
local applicable electrical codes can be used for the feeder branch circuit
protection. The Armor PowerFlex drive is self protected, therefore the feeder
protective device is only intended to protect the line-side power conductors.
ATTENTION:
Shielded motor cable is mandatory for EMC emission
compliant installations.
ATTENTION:
Select the branch circuit protection that complies with
NFPA 79 or NFPA 70 (NEC) and any other governing regional or local
codes.
WARNING:
If the branch circuit protective device trips, you must verify that
the Source Brake function is still operational before putting the equipment
back in service. If the source brake function is not working properly, loss of
brake function or motor damage can occur.
WARNING:
Do not install the Armor PowerFlex drive where the maximum
available fault current exceeds the product rating.