Final power checks before restarting, Additional tasks during preventive maintenance – Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control User Manual
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Rockwell Automation Publication 7000A-UM200C-EN-P - June 2014
Appendix C
Preventative Maintenance Schedule
6.
Verify the proper gate pulse patterns using Gate Test Operating Mode.
For drives with SPS boards installed, use the Test Power Harness (80018-
695-51) to power the rectifier SGCT boards.
7.
If there have been any changes to the system during the outage, place the
drive in System Test Operating Mode and verify all functional changes.
Final Power Checks before Restarting
1.
Ensure all cabinets are cleared of tools, and all component connections are
back in place and in the running state.
2.
Put all equipment in the normal operating mode, and apply medium
voltage.
3.
If there were any input or output cables removed, verify the input phasing,
and bump the motor for rotation.
4.
If there were any changes to the motor, input transformer, or associated
cabling, you will have to re-tune the drive to the new configuration using
Autotuning.
5.
Save all parameter changes (if any) to NVRAM.
6.
Run the application up to full speed/full load, or to customer satisfaction.
7.
Capture the drive variables while running, in the highest access level if
possible.
Additional Tasks During Preventive Maintenance
1.
Investigation of customer’s concerns relating to drive performance
•
Relate any problems found during above procedures to customer issues.
2.
Informal instruction on drive operation and maintenance for plant
maintenance personnel
•
Reminder of safety practices and interlocks on MV equipment, and on
specific operating concerns
•
Reminder of the need to properly identify operating conditions
3.
Recommendation for critical spare parts which should be stocked in-plant
to reduce production downtime
•
Gather information on all spare parts on site, and compare that with
factory-recommended critical spares to evaluate whether levels are
sufficient.
•
Contact MV Spare Parts group for more information.
4.
Vacuum Bottle Integrity Testing using a Vacuum Checker or AC Hipot
•
Refer to Publication
a detailed description of
all contactor maintenance.