Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 392)

D-2 Preventative Maintenance Schedule
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
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 be recorded if parts have been modified or
changed since the last Preventive Maintenance 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.