Notice: Undefined index: module in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
51
Notice: Undefined index: treeid in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
55
Notice: Undefined index: ismenu in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
61
Notice: Undefined index: isaccessory in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
64
Notice: Undefined index: num in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
67
Notice: Undefined index: where in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
71
Notice: Undefined index: orderby in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
72
Notice: Undefined index: num in
/usr/home/qxu1193020293/htdocs/source/hook/hook.category.php on line
73
Notice: Undefined index: module in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
72
Notice: Undefined index: treeid in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
75
Notice: Undefined index: ismenu in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
81
Notice: Undefined index: isaccessory in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
84
Notice: Undefined index: num in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
88
Notice: Undefined index: module in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
72
Notice: Undefined index: treeid in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
75
Notice: Undefined index: ismenu in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
81
Notice: Undefined index: isaccessory in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
84
Notice: Undefined index: num in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
88
Notice: Undefined index: module in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
72
Notice: Undefined index: treeid in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
75
Notice: Undefined index: ismenu in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
81
Notice: Undefined index: isaccessory in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
84
Notice: Undefined index: num in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
88
Notice: Undefined index: module in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
72
Notice: Undefined index: treeid in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
75
Notice: Undefined index: ismenu in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
81
Notice: Undefined index: isaccessory in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
84
Notice: Undefined index: num in
/usr/home/qxu1193020293/htdocs/source/model/index/model.category.php on line
88
防雷知识
标准规范
产品技术
通信开关电源采取信号防雷器的作用
阅读次数：2984 更新时间：2016-09-26
开关电源和线性电源相比，二者的成本都随着输出功率的增加而增长，但二者增长速率各异。线性电源成本在某一输出功率点上，反而高于开关电源，这一点称为成本反转点。
1、现代通信开关电源为实现无人值守，均具备远程监控功能，例如遥信、遥测、遥控，而与之相联的信号线接口通信距离长，极容易遭受感应雷损坏而造成停机等事故，根据信产部要求应加装相应的信号防雷器予以保护。
2、信号防雷器的防雷能力与安装方式有密切关系，主要是引线电感会产生额外的残压，应尽可能地缩短电力线与信号防雷器的连线和信号防雷器与接地汇接板连线的长度。
3、加装直流信号防雷器是最近发布的防雷标准中才提出的，因为直流防雷器的残压大大低于交流防雷器，因此能有效地提高通信开关电源通信站内敏感设备抵御雷电电磁脉冲的能力。
4、多级布置信号防雷器可减小引线电感带来的额外残压，因为前级防雷器已将大部分雷电流泄放入地，在后级的防雷器只泄放少部分雷电流，雷电流的减小必然导致引线上的附加残压减小。为保证防雷器前后级的能量配合，信号防雷器之间的电力电缆长度应不小于15米，否则应采用退耦器进行能量配合。
5、进局电力电缆的防雷容易引起重视，而其它进出通信站的电力线常常被忽视，如照明路灯线、塔灯电力线、非电信设施租用电信电力线等。现在宜采用太阳能塔灯，可减少一个雷击入侵渠道。其它出局电力线应在防雷系统的保护范围内，否则应采取专门的防雷措施
备案号：苏ICP备18044231号-2