电涌放电器.第5部分:选择和应用建议

[中文适用范围]： 本部分IEC 60099不是强制性标准，但提供了用于标称电压高于1 kV的三相系统中使用的浪涌保护器的选择和应用的信息、指导和推荐。它适用于IEC 60099-4中定义的无间隙金属氧化物浪涌保护器，IEC 60099-6中定义的额定电压为52 kV及以下的包含串联和并联间隙结构的浪涌保护器，以及IEC 60099-8中定义的用于架空输电和配电线路的外部串联间隙金属氧化物浪涌保护器（EGLA）。在附录J中，讨论了关于旧型SiC间隙保护器的一些方面。 浪涌保护器残余电压是大多数用户在选型时非常关注的主要参数。附录F给出了典型的最大浪涌保护器残余电压。然而，对于某些系统或某些国家，系统可靠性和设计的要求可能足够统一，因此本标准的推荐可能导致定义狭窄范围的保护器。在这种情况下，浪涌保护器的用户不需要将整个过程应用于任何新安装，可以继续使用先前实践产生的特性选择。 附录H和I提供了旧线路放电分类与新电荷分类之间的比较和计算。 [外文原描述]： IEC 60099-5:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60099-5:2018 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 J, some aspects regarding the old type of SiC gapped arresters are discussed. Surge arrester residual voltage is a major parameter to which most users have paid a lot of attention to when selecting the type and rating. Typical maximum residual voltages are given in Annex F. It is likely, however, that for some systems, or in some countries, the requirements on system reliability and design are sufficiently uniform, so that the recommendations of the present standard may lead to the definition of narrow ranges of arresters. The user of surge arresters will, in that case, not be required to apply the whole process introduced here to any new installation and the selection of characteristics resulting from prior practice may be continued. Annexes H and I present comparisons and calculations between old line discharge classification and new charge classification. This third edition cancels and replaces the second edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition regarding the new surge arrester classification introduced in IEC 60099-4:2014: a) Expanded discussion of comparison between the old and new classification and how to calculate or estimate the corresponding charge for different stresses. b) New annexes dealing with: - Comparison between line discharge classes and charge classification - Estimation of arrester cumulative charges and energies during line switching Keywords: selection and application of surge arrestors, nominal voltages above 1 kV