Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 417)

Component Definition and Maintenance 6-127
7000 “B” Frame 7000-UM150I-EN-P – June 2013
Annual Maintenance
As the name implies, these maintenance tasks should be performed
on an annual basis. These are recommended tasks, and depending on
the installation conditions and operating conditions, you may find
that the interval can be lengthened. For example, we do not expect
that torqued power connections will require tightening every year.
Due to the critical nature of the applications run on MV drives, the
key word is preventive. Investing approximately 8.0 hours per year
on these tasks is time well spent in adding insurance against
unexpected downtime.
Initial Information Gathering
Some of the important information to be recorded includes:
 Print Drive Setup
 Print Fault/Warning Queues
 Save Parameters to NVRAM
 Save Parameters to Operator Interface
 Circuit Board Part Numbers / Serial Numbers / Revision Letters*
(* This only needs to recorded if parts have been
modified/changed since the last PM activities)
W A R N I N G W A R N I N G To prevent electrical shock, ensure the main
power has been disconnected before working on
the drive. Verify that all circuits are voltage free
using a hot stick or appropriate voltage-measuring
device. Failure to do so may result in injury or
death.
Physical Checks (NO Medium Voltage and NO Control Power)
 Power Connection Inspection
 Inspect PF7000 drive, input/output/bypass contactor
sections, and all associated drive components for loose
power cable connections and ground cable connections:
torque them to the required torque specifications.
 Inspect the bus bars and check for any signs of overheating /
discoloration and tighten the bus connections to the required
torque specifications.
 Clean all cables and bus bars that exhibit dust build-up.
 Use torque sealer on all connections.
 Carry out the integrity checks on the signal ground and
safety grounds.