EN 61643-11 A11-2018
Components for low-voltage surge protective devices - Part 311: Performance requirements and test circuits for gas discharge tubes (GDT)
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- 标准号
- EN 61643-11 A11-2018
- 发布日期
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- /
- 国际标准分类号
- /
- 发布单位
- CENELEC - European Committee for Electrotechnical Standardization
- 适用范围
- This part of IEC 61643 is applicable to gas discharge tubes (GDT) used for overvoltage protection in telecommunications@ signalling and low-voltage power distribution networks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c..They are defined as a gap@ or several gaps with two or three metal electrodes hermetically sealed so that gas mixture and pressure are under control. They are designed to protect apparatus or personnel@ or both@ from high transient voltages. This standard contains a series of test criteria@ test methods and test circuits for determining the electrical characteristics of GDTs having two or three electrodes. This standard does not specify requirements applicable to complete surge protective devices@ nor does it specify total requirements for GDTs employed within electronic devices@ where precise coordination between GDT performance and surge protective device withstand capability is highly critical. This part of IEC 61643 -does not deal with mountings and their effect on GDT characteristics. Characteristics given apply solely to GDTs mounted in the ways described for the tests; -does not deal with mechanical dimensions; -does not deal with quality assurance requirements; -may not be sufficient for GDTs used on high-frequency (>30 MHz); -does not deal with electrostatic voltages; -does not deal with hybrid overvoltage protection components or composite GDT devices.