Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control - Manual (Page 175)

Rockwell Automation Publication 7000A-UM200C-EN-P - June 2014 175
Preventative Maintenance Schedule Appendix C
General Notes Maintenance of Medium Voltage Motor Control Equipment
For countries following NEMA standards, refer to National Fire Protection
Association Standard No. NFPA70E, Part II and (as applicable) OSHA rules for
Control of Hazardous Energy Sources (Lockout/Tagout) and OSHA Electrical
Safety Related Work Practices safety related work practices, including procedural
requirements for lockout-tagout, and appropriate work practices, personnel
qualifications and training requirements, where it is not feasible to de-energize
and lockout or tagout electric circuits and equipment before working on or near
exposed circuit parts.
For countries following IEC standards, refer to local codes and regulations.
Periodic Inspection
Medium Voltage Motor control equipment should be inspected periodically.
Inspection intervals should be based on environmental and operating conditions
and adjusted as indicated by experience. An initial inspection within 3 to 4
months after installation is suggested. Refer to the following standards for
general guidelines for setting-up a periodic maintenance program.
For countries following NEMA standards, refer to National Electrical
Manufacturers Association (NEMA) Standard No. ICS 1.1 (Safety Guidelines
for the Application, Installation, and Maintenance of Solid-Sate Control) for
MV Drives and ICS 1.3 (Preventive Maintenance of Industrial Control and
Systems Equipment) for MV Controllers.
For countries following IEC standards, refer to IEC 61800-5-1 Sec. 6.5 for MV
Drives and IEC 60470 Sec. 10, IEC 62271-1 Sec. 10.4 for MV Controllers.
Contamination
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 (e.g., hinges, fasteners, etc.). Dirty, wet or
contaminated control devices must be replaced unless they can be cleaned
effectively by vacuuming or wiping. 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: Servicing energized Medium Voltage Motor 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.