SR EN IEC 60099-8:2018

<span style="color:red">NEW!</span>IEC 60099-8:2017 is available as <a href="https://webstore.iec.ch/publication/61995">IEC 60099-8:2017 RLV</a> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>IEC 60099-8:2017 covers metal-oxide surge arresters with external series gap (externally gapped line arresters (EGLA)) that are applied on overhead transmission and distribution lines, only to protect insulator assemblies from lightning-caused flashovers.  This document defines surge arresters to protect the insulator assembly from lightning-caused over-voltages only. Therefore, and since metal-oxide resistors are not permanently connected to the line, the following items are not considered for this document: - switching impulse spark-over voltage; - residual voltage at steep current and switching current impulse; - thermal stability; - long-duration current impulse withstand duty; - power-frequency voltage versus time characteristics of an arrester; - disconnector test; - ag