SK EN 61643-21:2001/A1:2010

Pajisjet mbrojtëse nga vala goditëse e tensionit të ulët -Pjesa 21 : Pajisjet mbrojtëse nga vala goditëse e lidhur në rrjetet e sinjalizimit dhe ndërlidhjes në largësi -Kërkesat e performances dhe metodat e proves

Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods

Asnjë informacion i shtuar.

Is applicable to devices for surge protection of telecommunications and signalling networks against indirect and direct effects of lightning or other transient overvoltages. The purpose of these SPDs is to protect modern electronic equipment connected to telecommunications and signalling networks with nominal system voltags up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c.