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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.
| Author | IEC |
|---|---|
| Editor | CEI |
| Document type | Standard |
| Format | File |
| Edition | 1.0 |
| ICS | 29.240.10 : Substations. Surge arresters |
| Number of pages | 111 |
| Replace | IEC 37A/101/FDIS (2000-03) |
| Cross references | DIN EN 61643-21 (2002-03), IDT |
| Modified by | IEC 61643-21 AMD 2 (2012-07) IEC 61643-21 AMD 1 (2008-04) IEC 61643-21 Corrigendum 1 (2001-03) |
| Year | 2000 |
| Document history | IEC 61643-21 (2000-09) |
| Country | Switzerland |
| Keyword | IEC61643;IEC 61643-21:2000 |