Tuesday, September 4, 2018

Thermography Audit of Electrical Installations

A Sample Thermography Scan

Thermography Audit of Electrical Installations is an important aid for Electrical Maintenance Engineers to implement preventive maintenance schedules. The image to the left is a thermography scan of an MCB in a small distribution board. We can clearly see that the Y phase terminal has a brigher color indicating overheating due to loose connection of the cable connection.

Maintenance Engineers all know from bitter experience that  maintenance is a thankless job. Breakdown maintenance, in particular, is not only a thankless job but also nightmarish and a tension filled experience. To break out of the recurrent cycle of repeated breakdown maintenance, it is essential to rigorously implement a well planned preventive maintenance schedule.

For Electrical Maintenance Engineers, a vital part of the  preventive maintenance schedule is accurate and timely pinpointing of loose connections, overloading and hot spots in the electrical circuits. This is a tedious process with the added constraints of repeatedly arranging shutdowns of loaded equipment and panels to access electrical terminations and joints. This is where modern technology comes to the rescue.

An overloaded terminal block
Thermography, which involves the use of infra-red cameras to scan a heat source, has been in use in various fields including medicine and defence. Specialized thermal imaging cameras calibrated to scan electrical installations are now available to Electrical Engineers to assist in maintenance of electrical installations. Without prolonged shutdowns, it is now possible to scan live electrical systems to detect hot spots caused by overloading, flash-overs and loose connections and take preventive action before breakdown occurs.


Professional establishments are gradually including thermography as part of their preventive maintenance schedules.  Please contact me for more details about how you can use thermography as part of your preventive maintenance.