BS EN 60099-8-2011 避雷器.用于1 kV以上交流系统架空输配电线路的设有外间隙(EGLA)的金属氧化物避雷器

标准号：BS EN 60099-8-2011
中文标准名称：避雷器.用于1 kV以上交流系统架空输配电线路的设有外间隙(EGLA)的金属氧化物避雷器
英文标准名称：Surge arresters. Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV
标准类型：K49
发布日期：2011/6/30 12:00:00
实施日期：2011/6/30 12:00:00
中国标准分类号：K49
国际标准分类号：29.120.50;29.240.10
引用标准：IEC 60060-1-1989;IEC 60060-2-1994;IEC 60068-2-11-1981;IEC 60068-2-14-2009;IEC 60099-4-2009;IEC 60270-2000;IEC 60507-1991;IEC/TS 60815-1-2008;IEC 62217-2005;ISO 3274;ISO 4287;ISO 4892-1;ISO 4892-2;ISO 4892-3
适用范围：This part of IEC 60099 covers metal-oxide surge arresters with external series gap (externallygapped line arresters (EGLA) that are applied on overhead transmission and distribution lines,only to protect insulator assemblies from lightning-caused flashovers.This standard defines surge arresters to protect the insulator assembly from lightning-causedovervoltages only. Therefore, and since the metal-oxide resistors are not permanentlyconnected to the line, the following items are not considered for this standard:• switching impulse sparkover 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;• aging duties by power-frequency voltage.Considering the particular design concept and the special application on overheadtransmission and distribution lines, some unique requirements and tests are introduced, suchas the verification test for coordination between insulator withstand and EGLA protectivelevel, the follow current interrupting test, mechanical load tests, etc.Designs with the EGLA's external series gap installed in parallel to an insulator are notcovered by this standard.