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Project: T153700 #3262

An investigative study was undertaken to determine whether alternative or up-and-coming diagnostic methods have been developed for effectively measuring the integrity of porcelain, toughened glass and polymer/composite insulators, operating at 69 kV or greater, to warrant further lab testing and field trials. A search of available technical literature and information from the manufacturers of diagnostic technologies was conducted as part of Phase 1 of the project. This initial phase aims to investigate remote measuring devices and up-and-coming technologies that may be applicable to detecting internal latent damages on all types of transmission class line suspension and post insulators.

Utilities should avoid an insulator evaluation scenario where a remote sensing technique indicates a false positive or false negative, as this can create problems in terms of system reliability, personnel safety and financial costs. This becomes more apparent when one considers that approximately 40% to 50% of all transmission line outage issues and problems are related to insulators while such devices typically constitute just 3% to 4% of the overall cost of a new transmission line.

The results of the study of commercially available remote sensing techniques and up-and-coming diagnostic technologies were used to design an investigative pilot project to further examine the potential of these tools in accurately identifying faulty or latent damaged transmission line insulators.


AC, DC, Insulators, Suspension Insulator, Cap & Pin, Line Post Insulator, Porcelain, Porcelain Cracks, Latent Damage, Toughened Glass, Polymer, Composite, Non-Ceramic Insulators, Brittle Fracture, Inspections, In-Service Diagnostic Techniques, Condition Assessment, Failure Mechanisms, Modes Of Failure, Transmission Lines, Infrared, UV, Ultra Violet, Acoustic Emission, Partial Discharge, Parabolic Dish, CoroCam Camera, DayCor Camera, Microwave Radiometry, Ultrasonic Detection, Electrical Field Profile Measurement, High Frequency Diagnostic Technology, Laser Vibration Monitoring, Insulator Robots, Drones, UAVs, X-ray Detection, Laser Induced Fluorescence, Pilot Test Program