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IEC 61643-21 Ed. 1.0 b PDF
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Low voltage surge protective devices – Part 21: Surge protective devices connected to telecommunications and signalling networks – Performance requirements and testing methods
| Published by | Publication Date | Number of Pages |
| IEC | 09/29/2000 | 111 |
IEC 61643-21 Ed. 1.0 b – 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.The contents of the corrigendum of March 2001 have been included in this copy.
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