Thanks to a lot of informational equipments , there are more requirement to avoid thunder under the environment of intelligent building.So, these building have to possess the excellent measures .The design and construction must comply with the state standard for avoiding thunder of building (GB 50057-94, 2000version) and the standard of avoiding thunder for the building electrical informa-tion system(GB50343-2004).The paper expounds how to choose the power suege protector and setting principle for building electri -cal information system .%智能建筑环境，由于大量信息设备的存在，对防雷提出了更高要求。因此，此类建筑物必须具备良好的雷电防护措施，设计和施工应严格按国家标准《建筑物防雷设计规范》（ GB50057-94）（2000年版）和《建筑物电子信息系统防雷技术规范》（ GB50343-2004）进行。本文阐述了在建筑物的电子信息系统中如何选择电源浪涌保护器，以及设置原则。
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