过压和过流以太网端口电阻测试 |
ITU-T K.147建议书考虑了包括IEEE 802.3以太网在内的信息技术设备的过压和过流保护。此建议书介绍了如何将电涌耦合到系统中以及采用了哪些电涌缓解措施,同时考虑到实施方式和网络配置的差异。此外,此建议书还包含不同的电涌和电力故障测试电路方法以及如何进行规定测试的条件。联网设备可能会受到过压和过流瞬变的影响。数据和任何供电业务都应该能够抵御预期的环境瞬变。如果设备有多个独立端口,如中央集线器、交换机或中继器,则需要进行端口间电阻测试。电阻测试需要确定通过磁感应、地电位升高、电阻耦合和浪涌保护功能的限压操作或闪络引起的瞬态耦合耦合到网络中的雷电瞬变。电压限制可能会将信号路径中的共模浪涌转换为差模浪涌。交流主电源故障也可能耦合到网络中,这可能需要使用过流保护。 |
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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K Suppl. 3 (10/2015)
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ITU-T K.20, K.21, K.45, K.82 – Additional criteria to protect telecommunication cabling during a power cross event
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In force
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here
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here
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here
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K Suppl. 8 (11/2017)
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Resistibility analysis of 5G systems
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In force
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here
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here
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here
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K Suppl. 9 (05/2019)
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5G technology and human exposure to radiofrequency electromagnetic fields
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In force
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here
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here
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here
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K Suppl. 10 (11/2017)
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Analysis of electromagnetic compatibility aspects and definition of requirements for 5G mobile systems
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In force
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here
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here
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here
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K Suppl. 13 (12/2021)
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Radiofrequency electromagnetic field (RF-EMF) exposure levels from mobile and portable devices during different conditions of use
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In force
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here
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here
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here
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K Suppl. 14 (09/2019)
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The impact of RF-EMF exposure limits stricter than the ICNIRP or IEEE guidelines on 4G and 5G mobile network deployment
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In force
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here
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here
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here
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K Suppl. 16 (10/2022)
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Electromagnetic field compliance assessments for 5G wireless networks
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In force
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here
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here
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here
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K Suppl. 19 (09/2019)
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Electromagnetic field (EMF) strength inside underground railway trains
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In force
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here
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here
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here
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K Suppl. 23 (10/2020)
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Ethernet port surge voltages and currents
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In force
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here
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here
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here
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K Suppl. 29 (07/2022)
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Electromagnetic field strength inside and outside of electric vehicles using wireless power transfer technology
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In force
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here
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here
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here
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Title |
Approved on |
Download |
Mitigation measures for telecommunication installations – Chapter 10
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2006
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here
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Mitigation measures for telecommunication installations
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2004
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here
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Earthing and bonding
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2003
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here
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Guide to the use of ITU-T Publications produced by Study Group 5 aimed at achieving Electromagnetic Compatibility and Safety
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2002
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here
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Earthing of telecommunication installations
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1976
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here
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