29.120.50;33.040.30 标准查询与下载
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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
- ICS
- 29.120.50;33.040.30
- CCS
- 发布
- 2014
- 实施
- 2015-10-01
Low voltage surge protective devices. Part 21. Surge protective devices connected to telecommunications and signalling networks. Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- 发布
- 2012
- 实施
- 2013-07-01
Applicable to devices for surge protection of telecommunications and signalling networks against indirect and direct effects of lightning or other transient overvoltages.
Low voltage surge protective devices Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- K30
- 发布
- 2009-06-26
- 实施
- 2009-06-26
This International Standard 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 voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c.
Low voltage surge protective devices - Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- K31
- 发布
- 2001-08-31
- 实施
- 2001-08-31
Low voltage surge protective devices. Surge protective devices connected to telecommunications and signalling networks. Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- K31
- 发布
- 2001-08-31
- 实施
- 2001-08-31
This standard is about Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks; Performance requirements and testing methods; Corrigendum 1
Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks; Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- K31
- 发布
- 2001-03
- 实施
This International Standard is applicable to devices for surge protection of telecommunications and signalling netvvorks 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 netvvorks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c.
Low voltage surge protective devices Part 21: Surge protective devices connected to telecommunications and signalling networks — Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- 发布
- 2000-09
- 实施
This International Standard 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 voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c.
Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks; Performance requirements and testing methods
- ICS
- 29.120.50;33.040.30
- CCS
- K31
- 发布
- 2000-09
- 实施
- 2000-10-06
