Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
EN 61643-21:2001/A2:2013 (IEC 61643-21:2000/A2:201
Năm ban hành 1970
Publication date
Tình trạng
A - Còn hiệu lực
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Tên tiếng Anh
Title in English Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methodsIEC 616IEC 61643-21:2000
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Giá:
Price Liên hệ / Contact us
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Phạm vi áp dụng
Scope of 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 voltags up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c.
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