22 Rockwell Automation Publication 6000-TG100A-EN-P - September 2020
Chapter 2 Preventative Maintenance and Component Replacement
If inspection reveals that dust, dirt, moisture, or other contamination has
reached the control equipment, the cause must be eliminated. This could
indicate unsealed enclosure openings (conduit or other) or incorrect operating
procedures. Replace any damaged or embrittled seals, and repair or replace
any other damaged or malfunctioning parts. Replace dirty, wet, or
contaminated control devices unless they can be cleaned effectively by
vacuuming or wiping.
Physical Checks
Power Connection Inspection
• Inspect PowerFlex 6000T drive, input/output/bypass sections, and all
associated drive components for loose power cable connections and
ground cable connections: torque them based on 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.
• The torques of incoming / outgoing cable screws of the power unit shall
be check if they are in the specified range.
• Use torque sealer on all connections. Conduct integrity checks on the
signal ground and safety grounds.
Physical Inspection
• Check for any visual/physical evidence of damage or degradation of
components in the low voltage compartments.
- This includes relays, contactors, timers, terminal connectors, circuit
breakers, ribbon cables, control wires, optional UPS, AC/DC power
supplies, and so on. Causes could be corrosion, excessive temperature,
or contamination.
• Check for any visual/physical evidence of damage or degradation of
components in the medium voltage compartments (cables, contactors,
circuit breakers, isolation disconnecting blades, power units, and so on).
- This includes main cooling fan, power devices, heatsinks, circuit
boards, insulators, cables, capacitors, current transformers, potential
IMPORTANT
Compressed air is not recommended for cleaning because it may
displace dirt, dust, or debris into other parts or equipment, or damage
delicate parts.
ATTENTION: Performing service on energized Industrial Control Equipment
can be hazardous. Severe injury or death can result from electrical shock,
bump, or unintended actuation of controlled equipment. Recommended
practice is to disconnect and lockout control equipment from power
sources, and release stored energy, if present. See National Fire Protection
Association Standard No. NFPA 70E, Part II and (as applicable) OSHA rules for
Control of Hazardous Energy Sources (lockout/tagout) and OSHA Electrical
Safety Related Work Practices for safety-related work practices. These
publications include procedural requirements for lockout/tagout, and
appropriate work practices, personnel qualifications, and required training
where it is not feasible to de-energize and lockout or tagout electric circuits
and equipment before working on or near exposed circuit parts.
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