Rockwell Automation Publication 6000-UM002G-EN-P - August 2022
85
Chapter 5 Preventative Maintenance and Component Replacement
The maintenance work for the PowerFlex 6000 drive should normally be
performed on a yearly cycle. This work is carried out by Rockwell Automation
medium voltage drive customers. The customer may extend the maintenance
interval appropriately according to the installation conditions and operating
conditions of the drive. Determine the maintenance cycle and component/
items according to the customer site application. The purpose of performing
annual maintenance is to locate potential failures and take preventive
measures before a real failure occurs. Therefore it is recommended to spend
about 16 hours to perform annual maintenance to verify that the drive is
functioning reliably. This can greatly reduce the risk of unplanned downtime.
Before starting preventive maintenance, you should record some important
information, including:
1. Report of the previous preventive maintenance (if any).
2. Get motor parameters and applications.
3. Check the current settings of the drive.
4. Check the fault/warning queue.
5. Save parameters to a recipe file
(1)
or parameter record.
6. Record the board part number, serial number, and edition.
(2)
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 (No
Medium Voltage or Control
Power)
Power Connection Inspection
•
Inspect PowerFlex 6000 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, UPS, AC/DC Power Supplies,
(1) For devices with recipe function options.
(2) Records are required only if spare parts replacement is replaced after preventive maintenance activities.
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.