DEVELOPMENT OF SUSPENSION-TYPE ARRESTERS FOR TRANSMISSION-LINES

Currently, the application of arresters is drawing attention for the p revention of lightning faults on transmission lines. The line arrester s presently in use are of the long-rod type, which are installed in pa rallel with insulators. We have developed a suspension-type line arres ter employing advanced technologies such as improved ZnO elements and their incorporation in an insulator shed, which can be used as a repla cement for conventional insulators without a series gap. The high perf ormance and reliability of the suspension-type arrester have been conf irmed by laboratory and outdoor tests. A field test on a 66-kV service line was commenced in 1991.