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Article of the Month:
Thermographic Inspection of Substation Transformers
Philip M. Conte, Sr.
Test Engineer (retired)
and George Arthur
Asset Reliability Engineer
PSEG Laboratory and Testing Services40 Cragwood Road
South Plainfield, NJ 07080 www.pseg.com
When reporting thermal anomalies on exposed electrical components, data such as location, date, ambient conditions, temperature rise and load are usually recorded. But, when inspecting oil cooled substation transformers there are other key pieces of information that should be included in the report. This information will help system engineers diagnose the cause of the thermal anomaly, order specific parts and easily derive the action required to normalize cooling or conservatively de-rate the asset in terms of load carrying capability until the repair can be completed or a replacement can be installed.
This presentation will go over some common thermal anomalies to look for and data that should be recorded and where to find it when inspecting large oil cooled transformers. It will also touch on how to automatically import nameplate data from a database into your report to save time and data space by avoiding redundant information.
A Thermographer is like a professional photographer - both communicate a message about their subjects through imagery. Similar to photography, focus, composition, and exposure of thermograms are important since they are often the main vehicle that a Thermographer uses to convey information.
Burlington, NJ January 30, 2018 --- Infraspection Institute’s IR/INFO Conference was recently held in New Orleans, LA. IR/INFO 2018 marks the 29th anniversary for the advanced training conference, technical symposium and technology expo.
Thermal image shows thermal profile across a working steam trap. Infrared inspection conducted with the steam system under load. Taken by Stockton Infrared, this thermal image was the 1st Place winner - Mechanical Category in the annual Image Contest held during the IR/INFO 2017 Conference.