SR EN 61643-21:2003

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 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.

97.25

Status : Valid
Approval date : 10/30/2003
Publish date : 10/31/2003
Romanian version publish date : 9/30/2011
Withdrawal date : 1/31/2029
Number of pages : 60
ICS : 29.240.10 Substantion.Surge arreters
Technical Committee : 346 - Lightning protection

Relations with other standards: