IEC 61000-4-5:20 14涉及设备在开关和雷电瞬态过电压引起的单向浪涌方面的抗扰度要求、测试方法和推荐测试水平范围。定义了与不同环境和安装条件相关的几个测试级别。这些要求是为电气和电子设备制定的，并适用于电气和电子设备。本标准的目的是为评估电气和电子设备在受到浪涌时的抗扰度建立一个通用参考。记录的测试方法描述了评估设备或系统对规定现象的抗扰度的一致方法。本标准定义了以下范围: -测试水平； -测试设备； -测试设置；和 -测试程序。所述实验室测试的任务是找出在规定的操作条件下被测设备（EUT）对开关和雷电效应引起的浪涌电压的反应。其目的不是测试EUT绝缘承受高压应力的能力。本标准不考虑雷电流的直接注入，即直接雷击。本第三版取消并取代2005年出版的第二版，构成技术修订版，包括与上一版相关的以下重大技术变更: -关于浪涌波形数学模型的新附件E； -关于测量不确定度的新附件F； -关于脉冲测量系统校准方法的新附件G；和 -关于将浪涌耦合/去耦到额定高于200 A的线路的新附件H。此外，虽然连接到外部电信线路的端口的浪涌测试在第二版（IEC 61000-4-5:20 05）的6.2中有所阐述，但在第三版（IEC 61000-4-5:20 14）中，规范性附件A完全致力于该主题。特别是，它给出了10/700 μ s组合波发生器的规格。 关键词:电磁兼容性,EMC,TC77,SC77B

IEC 61000-4-5:2014 relates to the immunity requirements, test methods, and range of recommended test levels for equipment with regard to unidirectional surges caused by over-voltages from switching and lightning transients. Several test levels are defined which relate to different environment and installation conditions. These requirements are developed for and are applicable to electrical and electronic equipment. The object of this standard is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to surges. The test method documented describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon. This standard defines a range of:
- test levels;
- test equipment;
- test setups; and
- test procedures. The task of the described laboratory test is to find the reaction of the equipment under test (EUT) under specified operational conditions to surge voltages caused by switching and lightning effects. It is not intended to test the capability of the EUT's insulation to withstand high-voltage stress. Direct injections of lightning currents, i.e. direct lightning strikes, are not considered in this standard. This third edition cancels and replaces the second edition published in 2005, and constitutes a technical revision which includes the following significant technical changes with respect to the previous edition:
- a new Annex E on mathematical modelling of surge waveforms;
- a new Annex F on measurement uncertainty;
- a new Annex G on method of calibration of impulse measuring systems; and
- a new Annex H on coupling/decoupling surges to lines rated above 200 A. Moreover while surge test for ports connected to outside telecommunication lines was addressed in 6.2 of the second edition (IEC 61000-4-5:2005), in this third edition (IEC 61000-4-5:2014) the normative Annex A is fully dedicated to this topic. In particular it gives the specifications of the 10/700 μs combined wave generator. Keywords: electromagnetic compatibility, EMC, TC77, SC77B