Most recent
IEC 61643-21 Ed. 1.0 b:2000
Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
Is applicable to devices for surge protection of telecommunications and signalling networks against indirect and direct effects of lithning 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.
CONTENT PROVIDER
International Electrotechnical Commission [iec]
International Electrotechnical Commission [iec]