Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 178)

178 Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Chapter 3 Component Definition and Maintenance
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)
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.
• Check for any visual/physical evidence of damage and/or degradation of
components in the low voltage compartments.
– This includes Relays, Contactors, Timers, Terminal connectors, Circuit
breakers, Ribbon cables, Control Wires, etc.; Causes could be corrosion,
excessive temperature, or contamination.
– Clean all contaminated components using a vacuum cleaner (DO NOT
use a blower), and wipe clean components where appropriate.
• Check for any visual/physical evidence of damage and/or degradation of
components in the medium voltage compartments (inverter/rectifier,
cabling, DC Link, contactor, load break, harmonic filter, etc).
ATTENTION: To prevent electrical shock, disconnect the main power
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.