Allen-Bradley PowerFlex 7000 User Manual page 207

7000 "A" Frame
 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.
Preventative Maintenance Schedule
7000A-UM151E-EN-P - October 2018
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