Application of UV-C pulse radiation detection in checking faulty insulators

Faulty insulators change voltage distribution and field distribution in the vicinity of insulator string, which will exacerbate corona discharge, and in extreme cases the amplify can exceed 100%. This paper introduces an UV detector, which detects defective insulators by measuring the UV-light from the discharging insulator. Some tests were carried out. The results indicate that this method can identify corona discharge with good performance.