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General Notes
7000 "A" Frame
Maintenance of Medium Voltage Motor Control Equipment
A T T E N T I O N
A T T E N T I O N
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.
Preventative Maintenance Schedule
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.
E-11
7000A-UM151E-EN-P - October 2018
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