IEC 60099-5:1996/AMD1:1999

IEC 60099-5:2013 is not a mandatory standard but provides information, guidance, and recommendations for the selection and application of surge arresters to be used in three-phase systems with nominal voltages above 1 kV. It applies to gapless metal-oxide surge arresters as defined in IEC 60099-4, to surge arresters containing both series and parallel gapped structure - rated 52 kV and less as defined in IEC 60099-6 and metal-oxide surge arresters with external series gap for overhead transmission and distribution lines (EGLA) as defined in IEC 60099-8. In Annex H, some aspects regarding the old type of SiC gapped arresters are discussed. This second edition cancels and replaces the first edition published in 1996 and its amendment 1 published in 1999. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - Expanded discussion of different types of arresters and their application, including additions of discussion on transmission of line arresters, arresters for shunt capacitor switching arresters for series capacitor protection, application of arresters between phases connecting arresters in parallel; - Addition of section on asset management, including: managing surge arresters in the power grid, arrester maintenance, significantly expanded discussion of performance diagnostic tools, end-of-life considerations; - New annexes dealing with: arrester modelling for system studies, example of data needed for specifying arresters. Key words: selection and application of surge arrestors, nominal voltages above 1 kV