Non-intrusive condition assessment methods for transmission and distribution switchgear — CIGRE/CIRED A3.32 working group

The general trend of moving from time-based maintenance to condition based maintenance increased the availability of diagnostic techniques of Switchgears. Many emerging non-intrusive techniques are reported in the literature, offering in service or off service evaluation. The Joined Working Group (JWG) CIGRÉ/CIRED A3.32 has been formed in 2013 to analyze the state of the art of non-intrusive methods and their field experience applied to Circuit Breakers, Reclosers and Fault Interrupters for both Transmission and Distribution (T&D) Switchgears. After four years work done by 36 members from 18 countries, a Technical Brochure (TB) is going to be published in 2018. This paper would like to provide an overview of the treated topics as well a general guide to the Brochure's structure.