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sklademVydáno: 2022-03-30
22/30439450 DC
BS EN 61643-21. Low voltage surge protective devices Part 21. Surge protective devices connected to telecommunications and signalling networks. Performance requirements and testing methods
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| Označení normy: | 22/30439450 DC |
| Počet stran: | 84 |
| Vydáno: | 2022-03-30 |
| Status: | Draft for Comment |
Popis
22/30439450 DC
This standard 22/30439450 DC BS EN 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