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Homepage>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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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

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
DESCRIPTION

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
  • 29.240.10 Substations. Surge arresters

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