带电作业.防止电弧热危害用防护服.第1-2部分:试验方法.方法2:使用受限定向电弧测定材料和衣料电弧防护等级(箱中试验)

[中文适用范围]： IEC 61482 的这一部分规定了用于暴露于电弧的工人的耐热和阻燃服装的材料和服装的测试方法。与 IEC 61482-1-11 中的测试方法相反，低压电路中的定向和约束电弧用于对定义的电弧防护等级中的材料和衣物进行分类。本文件中规定的测试方法旨在确定在规定条件下是否满足电弧热保护。测试了两种防护等级。保护等级 1 和保护等级 2 是涵盖电气故障电弧造成的实际潜在风险的安全要求。注 1：实际上，可能存在更高的风险。风险分析应阐明实际风险。测试方法不针对测量电弧热性能值 (ATPV)。 IEC 61482-1-1 中规定了确定 ATPV 的方法。该标准规定了可以在规定的实验室条件下使用定向和约束电弧来评估材料和防护服的测试（箱式测试）。选择有关测试设置和测试条件、电气和结构参数的实际场景。测试时使用低电压程序。测试可以选择在两个固定测试类别中进行，根据预期短路电流量进行选择： 1 类 4 kA； 2 级 7 kA。两个测试类别中定义的电弧持续时间均为 500 毫秒。注 2：这些条件代表电气故障期间的低电压环境条件。材料和服装将采用两种方法进行测试：材料盒测试法和服装盒测试法。材料盒测试方法用于测量和查找在平面配置中测试时材料对电弧暴露的响应。电弧热性能的定量测量是通过材料传输的能量进行的。服装箱测试方法用于测试防护服经电弧照射后的功能，包括所有服装外观、缝线、扣件和其他配件；不会测量任何热通量。测试指的是热电弧效应；它不适用于其他影响，如噪音、光发射、压力升高、热油、电击、身体和精神冲击或有毒影响的后果。 [外文原描述]： This part of IEC 61482 specifies methods to test material and garments intended for use in heat- and flame-resistant clothing for workers exposed to electric arcs. In contrast to the test methods in IEC 61482-1-1 a directed and constrained electric arc in a low voltage circuit is used to classify material and clothing in defined arc protection classes. The test methods specified in this document are aimed at rendering a decision whether arc thermal protection is met under defined conditions. Two protection classes are tested. Protection class 1 and protection class 2 are safety requirements covering actual risk potentials due to electric fault arcs. The test methods are not directed toward measuring the arc thermal performance value (ATPV). Methods determining the ATPV are prescribed in IEC 61482-1-1. This standard specifies tests with which it is possible to evaluate materials and protective clothing based on the use of a directed and constrained electric arc under defined laboratory conditions (box-test). A practical scenario concerning test set-up and test conditions, electrical and constructional parameters is selected. For the tests a low voltage procedure is used. The tests can optionally be carried out in two fixed test classes, selected by the amount of prospective short circuit current: Class 1: 4 kA; Class 2: 7 kA. The defined duration of the electric arc is 500 ms in both test classes. Materials and clothing will be tested with two methods: the material box test method and the garment box test method. The material box test method is used to measure and find material response to an arc exposure when tested in a flat configuration. A quantitative measurement of the arc thermal performance is made by means of the energy transmitted through the material. The garment box test method is used to test the function of the protective clothing after an arc exposure, including all the garment findings, sewing tread, fastenings and other accessories; no heat flux will be measured. Testing refers to the thermal arc effects; it does not apply to other effects like noise, light emissions, pressure rise, hot oil, electric shock, the consequences of physical and mental shock or toxic influences.