带电作业.防止电弧热危害用防护服.第1部分:试验方法.方法1:衣料用抗燃材料的电弧等级测定(电弧热防护性能值或者EBT50)

[中文适用范围]： IEC 61482的这一部分规定了测量用于暴露于电弧热效应的工人的耐热阻燃服装的材料的电弧热性能值的测试方法以及使用这些材料的服装的功能。这些测试方法测量满足以下要求的材料的电弧热性能值：根据 ISO 15025@ 程序 B（底边点火）进行测试时，焦距小于 100 毫米，离火后余焰小于 2 秒外部材料@和使用附录A中所述的修改后的ISO方法测量的炭化长度。这些方法用于测量和描述材料@产品@组件或服装@响应于由物质产生的对流和辐射能的特性。在受控实验室条件下的露天电弧。这些方法中使用的材料为方法 A 的平坦样本和方法 B 的服装形式。方法 A 用于确定材料和材料组件在平坦配置下测试时的电弧等级。方法 B 用于测量服装对电弧暴露的反应@不是电弧等级@，包括在男性人体模型躯干上测试时的所有服装结果@缝纫线@紧固件@织物和其他配件。方法B也用于意外复制。 IEC 61482 本部分的用户有责任在使用前建立适当的安全和健康实践。具体注意事项@参见第7条。IEC 61482本部分中的测试方法不针对按防护等级进行分类。 IEC 61482-1-2 中规定了确定防护等级的方法。 [外文原描述]： IEC 61482-1-1:2009 specifies test methods to measure the arc thermal performance value of materials intended for use in heat- and flame-resistant clothing for workers exposed to the thermal effects of electric arcs and the function of garments using these materials. These test methods measure the arc thermal performance value of materials which meet the following requirements: less than 100 mm char length and less than 2 s afterflame after removal from flame, when tested in accordance with ISO 15025, procedure B (bottom-edge ignition) on the outer material, and the char length measured using a modified ISO method as described in Annex A. These methods are used to measure and describe the properties of materials, products, assemblies or garments, in response to convective and radiant energy generated by an electric arc in open air under controlled laboratory conditions. The materials used in these methods are in the form of flat specimens for method A and garments for method B. Method A is used to determine the arc rating of materials and material assemblies when tested in a flat configuration. Method B is used to measure garment response, not arc rating, to an arc exposure including all the garment findings, sewing thread, fastenings, fabrics and other accessories when tested on a male mannequin torso. Method B is also used for accident replication.