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sklademVydáno: 2023-08-15
23/30478750 DC
BS EN IEC 61643-21. Low voltage surge protective devices Part 21. Surge protective devices connected to telecommunications and signalling networks. Requirements and testing methods
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| Označení normy: | 23/30478750 DC |
| Počet stran: | 87 |
| Vydáno: | 2023-08-15 |
| Status: | Draft for Comment |
Popis
23/30478750 DC
This standard 23/30478750 DC BS EN IEC 61643-21. Low voltage surge protective devices is classified in these ICS categories:
- 29.240.10 Substations. Surge arresters
- 33.040.30 Switching and signalling systems
- 29.120.50 Fuses and other overcurrent protection devices