One of the issues in maintenance of overhead lines and substations relates to better understanding what is being revealed during ultraviolet or infrared inspections of equipment and hardware. Do these two technologies highlight the same problem or are they complementary, each revealing a different aspect of that problem? Moreover, is it correct to assume that each different type of potential defect carries some unique ‘signature’ and therefore requires its own specific inspection technology? This 2014 INMR article, contributed by Roel Stolper, an expert researcher in diagnostics with CSIR in South Africa, addressed these questions.
Typical Problems on Lines
Electric utilities and research organizations worldwide have launched programs to investigate and classify all the typical faults that occur on overhead lines. A past Working Group within CIGRE, for example, has been dedicated to better understanding the behaviour of polymeric insulators under different environmental conditions