Installation of Polymer Stem Insulator for Electric Railway

전철용 고분자 장간애자 실용화

Polymer stem insulator for an electric railway has been developed in 1995 in Korea. Owing to its excellent electrical and physical characteristics, KT mark was awarded for the developed polymer stem insulator. After new specification of KNR(Korea National Railway) was established, tile evaluation of long-term reliability combined with the improvement of manufacturing process was carried out. In 1998, this polymer stem insulator was installed in commercial electrical railway line. This paper presents the long-term reliability properties of the installed polymer stem insulator compared with conventional insulator. The location of tile installed polymer stem insulator in KNR is also introduced.