Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 117)

Rockwell Automation Publication 7760-UM001D-EN-P - October 2014 117
Maintenance Chapter 9
see NEMA Standards Publication No. ICS 1.1 - 1987 entitled “Safety Guidelines
for the Application, Installation and Maintenance of Solid State Control”.
Static-Sensitive Items
While performing maintenance on the MV SMC, special precautions must be
observed in handling or touching certain static-sensitive components in the
cabinet. Most circuit cards and SCRs can be damaged by Electro-Static
Discharge (ESD). If personnel will make contact with an ESD-sensitive
component during maintenance, they must be grounded. Grounding should be
accomplished with a wrist strap which is connected to an approved ground.
Overload Maintenance After a Fault Condition
See NEMA Standards Publication No. ICS 2 Appendix A entitled “Maintenance
of Motor controllers after a fault condition”.
Final Check Out
After maintenance or repair of industrial controls, always test the control system
for proper functioning under controlled conditions that avoid hazards in the
event of a control malfunction.
Keep Good Maintenance Records
Good maintenance records will help reduce major, costly shutdowns by
demanding the use of proper test equipment and an appropriate inventory of
spare parts. This suggestion will be most helpful in locating possible intermittent
problems by pointing to a particular area of recurring trouble within the overall
system. For additional information see NFPA 70B, “RECOMMENDED
PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE”,
published by the National Fire Protection Association.
Power Components
Power components should be kept clean and free of dirt and obstructions. This
will avoid tracking and heat build-up, thereby increasing the life of the device.
ATTENTION: Use of other than factory recommended test equipment for solid-
state controls may result in damage to the control or test equipment, or
unintended actuation of the controlled equipment.