···························。····。··································································。·············…… 1 1 范 围 ·······。·································································。····································…… 1 2 规范性引用文件 .·一· 1 3 术语和定义 ·····。····。·····。·····················································································…… 1 4 系统功能要求 ···································································································…… 4 5 系统设计与设备安装要求··········································································.·…… 10 6 安全性要求 ·····························································。········································…… n 7 电磁兼容性要求 ································································································…… 11 8 防雷接地要求 ···································································································…… 11 9 环境适应性要求 ·······························································································…… n 10 可靠性要求 ······························································。·······································…… 12 附录A(资料性 附录) 系统 防护级别分类推荐表 ·····························