火灾危险测试 第2-20部分：基于灼热/热线的测试方法 热线点火测试 (HWI) 方法 设备、验证、测试方法和指导

[中文适用范围]： 本部分为IEC 60695的技术规范，描述了一种适用于能够提供测试样本的固体电绝缘材料的测试方法。该测试测量当测试样本受到缠绕在其上的电热丝加热影响时点燃所需的时间。该方法可用于提供分类，用于质量保证、如IEC 60695-1-30所述的产品材料预选，或验证终端产品中使用的材料所需的最低分类。 [外文原描述]： IEC TS 60695-2-20:2024, which is a technical specification, describes a test method that applies to solid electrical insulating materials of which test specimens can be provided. The test measures the time required to ignite a test specimen when it is affected by heat from an electrically heated wire wound around the test specimen. The test method can be used to provide classifications which can be used for quality assurance, the preselection of materials of products as described in IEC 60695-1-30, or to verify the required minimum classification of materials used in end products. This fourth edition cancels and replaces the third edition published in 2021. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Removed all text which was related to drip or dripping, since in this 4th edition only ignition is taken into consideration for determination of the classification level; Title changed: "Hot wire coil test method" is now "Hot wire ignition (HWI) test method".