Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control (PanelView 550) - Manual (Page 203)

Preventative Maintenance Schedule E-3
7000 “A” Frame 7000A-UM151D-EN-P – March 2013
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 main cooling fan, 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 torque on heatsink bolts (electrical connections to bullet
assemblies) is within specifications (13.5 N-m).
Clean all contaminated components using a vacuum cleaner (DO
NOT use a blower), and wipe clean components where appropriate.
NOTE: An important component to check for contamination is the
heatsink. The fine grooves in the aluminum heatsinks can capture
dust and debris.
Carry out the physical inspection and verification for the proper
operation of the contactor/isolator interlocks, and door interlocks.
Carry out the physical inspection and verification for the proper
operation of the key interlocks.
Physical verification of the additional cooling fans mounted in the
AC Line Reactor cabinet, Harmonic Filter cabinet for mounting and
connections.
Carry out the cleaning of the fans and ensure that the ventilation
passages are not blocked and the impellers are freely rotating
without any obstruction.
Carry out the insulation meggering of the drive, motor, isolation
transformer/line reactor, and the associated cabling.
Refer to User’s Manual, Appendix D for meggering procedure.
Check clamp head indicator washers for proper clamp pressure, and
adjust as necessary.
Refer to page 5-17, “Uniform Clamping Pressure” and
“Checking Clamping Pressure” for details on proper clamp
pressure.