標(biāo)準(zhǔn)號：BS EN 60099-8-2011
中文標(biāo)準(zhǔn)名稱：避雷器.用于1 kV以上交流系統(tǒng)架空輸配電線路的設(shè)有外間隙(EGLA)的金屬氧化物避雷器
英文標(biāo)準(zhǔn)名稱：Surge arresters. Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV
標(biāo)準(zhǔn)類型：K49
發(fā)布日期：2011/6/30 12:00:00
實施日期：2011/6/30 12:00:00
中國標(biāo)準(zhǔn)分類號：K49
國際標(biāo)準(zhǔn)分類號：29.120.50;29.240.10
引用標(biāo)準(zhǔn)：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
適用范圍：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.