Problems with Line Arresters
NB Power’s history with transmission line arresters began in October 2001. Over the following years, a number of manufacturing defects as well as installation problems were experienced. It was also observed that hardware components supplied with the arrester are showed premature signs of wear.
The following photos illustrate examples of arrester problems experienced.
As part of its program of installing transmission line arresters, NB Power purchased these components from three different manufacturers and experienced hardware problems with each of them (see Table 2). In addition to the problems noted above there have also been other hardware problems such as suspension eyelets breaking and a failed pipe clamp on a dead-end insulator/arrester assembly.