Abstract
A line surge arrester using metal-oxide elements (LSA) has been applied for lightning protection of overhead lines. Externally gapped line surge arrester (EGLA) is a proven technology in Japan, for which an IEC standard was published in 2011. This is the first dedicated IEC standard for LSAs. This paper summarizes the essence, providing a technical background to utilize the IEC standard. Another aspect of the IEC standardization for LSAs includes revision of the surge arrester application guide IEC 60099-5, of which the FDIS (Final Draft International Standard) will be circulated shortly. The revised standard will newly include contents regarding LSAs, and is expected to provide necessary information for their application. This paper also intends to address issues in testing and applying LSAs with these IEC standards.
