Further tests on bushings from 25 kV k -11 switchgear (TN-ETR-010)

Research Department Technical Note ETR 2 (Ref. 1) describes an analysis of bushing performance in K-11 switchgear and shows that the noisy bushings probably constitute a batch of poor manufacture. In that report it is stated that noisy bushings should be removed from service. In order to correlate audible noise,...