Concluding report on investigation into audible discharge in K-11 25kV switchgear bushings (TM-ETR-30)

The report concludes the investigation into audible discharge in K-11 25kV switchgear bushings. Results are reported of measurements on the final batch of new bushings, on ‘noisy’ bushings removed from service, and new bushings which have been installed for 3 years at Camden track sectioning cabins (TSCs). Also...