标准摘要
[中文适用范围]： IEC 60695 的这一部分描述了一种由两个小规模实验室测试程序组成的测试方法，旨在比较电工产品中使用的不同材料的燃烧行为。将垂直定向的棒状试样或水平定向的板试样暴露于标称热功率为 500 W 的小火焰点火源。该测试方法使用两种试样配置对材料性能进行分类。矩形条形测试样本用于评估可燃性和燃烧行为@，方形板测试样本用于评估测试样本的耐烧穿性@，如8.3.3 中所定义。该测试方法仅适用于根据 IEC 60695-11-10 分类为 V-0 或 V-1 的材料。该测试方法仅适用于根据 ISO 845 确定的表观密度超过 250 kg/m3@ 的固体和多孔材料。该方法不适用于由于其自身原因而从所施加的火焰中收缩而不会点燃的材料。薄度。所述测试方法提供的分类可用于质量保证@产品成分材料的预选@或验证最终产品中使用的材料所需的最低可燃性分类。如果用于预选@，则应在等于产品应用中使用的最小厚度的测试样本厚度下获得阳性结果。获得的结果提供了有关材料在使用中的行为@的一些信息，但其本身并不能保证使用中的安全性能。注 1：IEC 60695-1-30 [3]1 中给出了预选指南。注2：测试结果受材料添加剂@例如颜料@填料@和阻燃剂@以及各向异性方向和分子质量等特性的影响。本基本安全出版物旨在供技术委员会根据 IEC 指南 104 和 ISO/IEC 指南 51 中规定的原则制定标准。技术委员会的职责之一是@在适用的情况下@使用其出版物的编写过程中涉及基本安全出版物。除非相关出版物中特别提及或包含，否则本基本安全出版物的要求@测试方法或测试条件将不适用。 1 方括号中的数字指的是参考书目。 [外文原描述]： IEC 60695-11-20:2015 describes a test method consisting of two small-scale laboratory test procedures which is intended to compare the burning behaviour of different materials used in electrotechnical products. Vertically oriented bar specimens or horizontally oriented plate test specimens are exposed to a small flame ignition source with a nominal thermal power of 500 W. The test method uses two test specimen configurations to classify material performance. Rectangular bar-shaped test specimens are used to assess ignitability and burning behaviour, and square plate test specimens are used to assess the resistance of the test specimen to burn-through, as defined in 8.3.3. This test method only applies to materials that have been classified as V-0 or V-1 according to IEC 60695-11-10. This test method is only applicable to solid and cellular materials that have an apparent density of more than 250 kg/m3, determined in accordance with ISO 845. The method does not apply to materials that shrink away from the applied flame without igniting due to their thinness. The test method described provides classifications which may be used for quality assurance, the pre-selection of component materials of products, or to verify the required minimum flammability classification of materials used in end products. If used for pre-selection, then positive results shall be obtained at a test specimen thickness which equals the smallest thickness used in the product application. The results obtained provide some information about the behaviour of materials in service, but cannot by themselves assure safe performance in service. This second edition cancels and replaces the consolidated version of IEC 60695-11-20 published in 2003. This edition constitutes a technical revision. The main changes with respect to the first edition are as follows: - The Part title has been modified to the singular - 500 W flame test method; - Editorial changes have been made throughout the document for the purpose of aligning IEC 60695-11-10 with IEC 60695-11-20; - The Introduction has been modified to clarify the description of the test method; - The Scope has been modified for clarification; - All occurrences of the term "fixture" have been deleted from the document; - Preferred thickness values have been added to 7.2 and 7.3; - 7.4.4: 'Thickness measurement' is now numbered 7.5 to which a new Table 1 - Thickness tolerances has been added; - New Subclause 8.1.4 'Conditioning of the cotton pad' has been added; - 8.2.3 clarifies the application of the test flame to distorted specimens; - Explanatory notes have been added to Figures 5 and 6 and the Bibliography has been updated and references added. This basic safety publication is intended for use by technical committees in the preparation of standards in accordance with IEC Guide 104 and ISO/IEC Guide 51. Key words: Test flames,Fire Hazard, Fire Test Method This publication is to be read in conjunction with IEC 60695-11-3:2012 . The contents of the corrigendum of January 2016 have been included in this copy.
英文名称Fire hazard testing - Part 11-20: Test flames - 500 W flame test method