ITU-T K.46-2012
保护使用金属对称导体的电信线路免受雷电感应突波损害.5号研究组

Protection of telecommunication lines using metallic symmetric conductors against lightning-induced surges (Study Group 5)

ITU-T K.46-2012 发布历史

Recommendation ITU-T K.46 gives a procedure to protect telecommunication lines using metallic symmetric conductors (i.e., twisted pair cables) against overvoltages and overcurrents imposed on the lines due to nearby lightning flashes. The procedure is based on the representation of the line by a sequence of sections and nodes, and the evaluation of each node exposure to the lightning-induced surges. Based on the node exposure, the ground flash density and the earth resistivity, the annual number of surges above a given voltage level is calculated. If the voltage level considered is the impulse withstand voltage of the node, then the number of surges above this level corresponds to the annual number of damages to the node. This number shall be multiplied by the loss due to induced surges in order to obtain the risk of failure due to indirect lightning flashes. The highest risk of all nodes is the risk of the line.

ITU-T K.46-2012由国际电信联盟 IX-ITU 发布于 2012-05-01。

ITU-T K.46-2012 在中国标准分类中归属于: M04 基础标准和通用方法。

ITU-T K.46-2012 发布之时，引用了标准

• ITU-T K.12-2010 用于保护通讯设备的气体放电管的特性.5号研究组
• ITU-T K.27-1996 电信大楼内的连接结构和接地-抗干扰防护(研究组5)26页
• ITU-T K.28-2012 电信设施保护的基于晶闸管的电涌保护装置参数 研究组5
• ITU-T K.47-2012 避免通信线路直接接触闪电的防护.5号研究组
• ITU-T K.66-2011 (预发布)过电压用户端的保护
• ITU-T K.67-2006 雷电引起的电信和信令网络上的预期浪涌 研究组5
• ITU-T K.72-2011 (预发布)使用金属导体防雷电风险管理的通信线路保护
• IEC 62305-2-2010 雷电防护.第2部分:风险管理

ITU-T K.46-2012的历代版本如下：

• 2003年07月01日 ITU-T K.46-2003 使用金属对称导体的电信线路的抗雷电感应浪涌的保护 系列K:抗干扰防护(研究组5)
• 2008年04月01日 ITU-T K.46-2008
• 2012年05月01日 ITU-T K.46-2012 保护使用金属对称导体的电信线路免受雷电感应突波损害.5号研究组

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标准号

ITU-T K.46-2012

发布日期

2012年05月01日

实施日期

废止日期

无

中国标准分类号

M04

发布单位

IX-ITU

引用标准

ITU-T K.12-2010 ITU-T K.27-1996 ITU-T K.28-2012 ITU-T K.47-2012 ITU-T K.66-2011 ITU-T K.67-2006 ITU-T K.72-2011 IEC 62305-2-2010

适用范围

Recommendation ITU-T K.46 gives a procedure to protect telecommunication lines using metallic symmetric conductors (i.e., twisted pair cables) against overvoltages and overcurrents imposed on the lines due to nearby lightning flashes. The procedure is based on the representation of the line by a sequence of sections and nodes, and the evaluation of each node exposure to the lightning-induced surges. Based on the node exposure, the ground flash density and the earth resistivity, the annual number of surges above a given voltage level is calculated. If the voltage level considered is the impulse withstand voltage of the node, then the number of surges above this level corresponds to the annual number of damages to the node. This number shall be multiplied by the loss due to induced surges in order to obtain the risk of failure due to indirect lightning flashes. The highest risk of all nodes is the risk of the line.

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