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Article of the Month:
NFPA 70B and CSA Z463 Standards for Electrical Maintenance: Where Does Airborne Ultrasound Fit In?
When it comes to establishing an electrical maintenance program for your facility, there are many resources at your disposal to which you could look. As for the tools that can be used to then inspect energized electrical equipment, an infrared camera is probably the first tool that comes to mind. Some of you may have even said an airborne ultrasound instrument. If you said ultrasound, you are among a growing number of maintenance and reliability professionals who have come to realize that airborne ultrasound is a viable tool that can effectively be used to inspect and diagnose conditions such as corona, tracking, arcing, and partial discharge in energized electrical equipment.
The standards that maintenance and reliability professionals have access to for guidance when establishing procedures and best practices for inspecting and maintaining electrical equipment in facilities are the National Fire Protection Association (NFPA) 70B, and the Canadian version the Canadian Standards Association (CSA) Z463. Both of these documents have been established in order to create recommended practices for inspecting and maintaining electrical assets in order to prevent accidents and reduce downtime.
Thermal image shows a large warm area caused by wet insulation within a gravel-surfaced flat roof. Captured post-sunset under calm weather conditions, image shows a thermal pattern that is typical for insulations that readily absorb water. Taken by Randy Kiez, this thermal image was the 1st Place winner - Roof Category in the annual Image Contest held during the IR/INFO 2016 Conference.