Low voltage surge protective devices -- Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods.
NORMA vydána dne 28.10.2002
Designation standards: UNE-EN 61643-21:2002
Publication date standards: 28.10.2002
The number of pages: 65
Approximate weight : 195 g (0.43 lbs)
Country: Spanish technical standard
Kategorie: Technické normy UNE