Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 479)

Component Definition and Maintenance 6-135
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
A T T E N T I O N A T T E N T I O N 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, 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).
 This includes cooling fans, power devices, heatsinks, circuit
boards, insulators, cables, capacitors, resistors, current
transformers, potential transformers, fuses, wiring, etc.;
Causes could be corrosion, excessive temperature, or
contamination.
 Verify that torque on heatsink bolts (electrical connections to
bullet assemblies) is within specifications (13.5 N-m).