• IEC 61643-21 Ed. 1.0 b:2000

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

International Electrotechnical Commission , 09/29/2000

Publisher: IEC

File Format: PDF

$183.00$367.00


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. The contents of the corrigendum of March 2001 have been included in this copy.

More IEC Standards PDF

IEC 61300-3-5 Ed. 1.0 b:2004
IEC 60061-3 Amd.33 Ed. 3.0 b:2004
IEC 61211 Ed. 2.0 b:2004

IEC 61211 Ed. 2.0 b:2004

$72.00 $145.00

IEC 62148-12 Ed. 1.0 b:2004