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| International Standard Category: Substations. Surge arresters |
GB/T 18802.21-2004 Low-voltage surge protective devices - Part 21:Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
低压电涌保护器 第21部分：电信和信号网络的电涌保护器（SPD）性能要求和试验方法 ;
| Category No.: | 29.240.10 | Valid Status: | superseded |
| Issued Organization: | AQSIQ; SAC | Issued Date: | 2004-2-4 |
| Implemented Date: | 2004-6-1 | Abolished Date: | 2016-09-01 |
| Superseded Standard.: | GB/T 18802.21-2016 Low-voltage surge protective devices―Part 21: Surge protective devices connected to telecommunications and signaling networks―Performance requirements and testing methods |
Superseded Date: | 2016-9-1 |
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