GB/T 18802.351-2019/IEC 61643-351:2016
低压电涌保护器元件第351部分: 电信和信号网络的电涌隔离变压器(SIT)的性能要求和试验方法
Components for low-voltage surge protective devices—Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) (IEC 61643-351:2016,IDT) 2019-12-10 发布
2020-07-01 实施
前言........................................1
引言...........................................1
1范围....................................................1
2规范性引用文件..................................1
3术语和定义、符号和缩略塔..............................1
3.1术语和定义..................................1
3.2符号..........................................3
3.3缩略语.........................................5
4使用条件...........................................5
4.1温度范围........................................5
4.2相对湿度........................................5
4.3海拔..........................................5
4.4徹气候.........................................5
5 SIT电涌环境........................................6
5.1 S】T电涌抑制.....................................6
5.2共模电涌........................................7
5.3差模电涌    ........................................
6特性............................................7
6.1特性測址........................................7
6.2输入绕组与输出绕组之间的电容............................8
6.3    绝缘电阻（】R〉..................................... 9
6.4    信号SIT电压-时间乘积 ................................11
7额定值...........................................12
7.1額定冲击耐受电压...................................12
7.2信号SIT绕组额定直流电流...............................15
8标识............................................16
8.1慨述..........................................16
8.2参数表.........................................16
8.3 标志..........................................16
附录A （资料性附录）1.2/50冲击...............................17
参考文献...........................................18
图1双绕组S【T符号..................................