GB/T 19856.2-2005雷电防护　通信线路　第2部分：金属导线.pdf

ICS 33.040.50 M 42 遏日 中 华 人 民 共 和 国 国 家 标 准 GB/T 19856.2-2005/IEC 61663-2:2001 雷电防护 通信线路 第2部分:金属导线 Lightning protection-Telecommunication lines- Part 2:Lines using metallic conductors (IEC 61663-2:2001，IDT) 2005-07-29发布 2006-04-01实施 中华人民共和国国家质量监督检验检疫总局 发 布 中国国家标准化管理委员会 / GB/T 19856.2-2005/IEC 61663-2:2001 目 次 前言 ··、·······，，···················，·，········，························，········································，，… 8I 引言 ···，··················································，··············，，···········································……IV 1 范围 ····，，··········，，·······，·········，·············，·············································，···········…… 1 2 规范性引用文件 ·，·····，······· ········，，······················，··········……，，二，，········…… 1 3 术语和定义 ································，·······················】·······················」·····················…… 1 4 参考结构 ········，·········，，，二·。1········。。，，······，·，，，··，·1···，·，·。。·········，····‘·····……7 5 环境因子KQ、安装因子K,、屏蔽因子K，以及过渡点约定长度LET·································……8 6 防护需求·，······················，···········································，，···············，················……10 7 防护措施·，····，·····，，··‘··················，··········，，···················································，·…14 附录A(规范性附录)采用金属导线的通信线路和信号线路雷电防护措施需求的评估程序···……20 附录13(规范性附录)通信线路沿线与地连接的电缆屏蔽层的电阻值·····，·······················…… 22 附录C(规范性附录)引起进人建筑物的通信线路受损的直击建筑物的雷电流I的估算······……23 附录