封闭式低压成套开关设备和控制设备在内部故障引起电弧情况下的试验导则

[中文适用范围]： 本技术报告提供了在内部故障引起的空气中电弧条件下测试组件方法的指导。 本测试的目的是评估组件在内部电弧故障情况下限制人身伤害风险、组件损坏的能力及其是否适合继续使用。 本技术报告中的测试程序仅适用于： - 根据IEC 61439-2的封闭式、落地式或壁挂式低压开关设备和控制设备组件（电力开关设备和控制设备组件 - PSC组件）； 注：本技术报告可作为其他产品电弧故障测试的参考，但需根据其他组件或产品的具体情况调整测试程序和验收标准。 当用户和制造商同意在不同或更严格的条件下进行测试时，本技术报告可作为指导。 本技术报告中的测试程序考虑了： - 内部过压对盖子、门等的影响； - 电弧或其根部对围护结构以及喷射出的热气体和炽热颗粒的热效应。 本技术报告中的测试程序不包括： - 可能构成风险的其他影响，如有毒气体和噪音； - 维护工作期间、开门或类似情况下的条件； - 对组件顶部和底部的访问。 这是一项由制造商自行决定的非强制性测试。 [外文原描述]： IEC TR 61641:2014 gives guidance on the method of testing of ASSEMBLIES under conditions of arcing in air due to an internal fault. The purpose of this test is to assess the ability of the ASSEMBLY to limit the risk of personal injury, damage of ASSEMBLIES and its suitability for further service as a result of an internal arcing fault. This third edition cancels and replaces the second edition published in 2008. It constitutes a technical revision. This third edition includes the following significant technical changes with respect to the previous edition: - arcing classes to define the different forms of protection provided against arcing faults; (i) personnel protection, (ii) damage restricted to part of the ASSEMBLY, and (iii) ASSEMBLY suitable for limited further service.; - two levels of personnel protection afforded by ASSEMBLIES under arcing fault conditions; (i) for ASSEMBLIES installed in areas where access to the ASSEMBLY is restricted to skilled persons, and (ii) for ASSEMBLIES installed in areas where the area is accessible to ordinary persons; - option of individually insulating all live conductors to make the complete ASSEMBLY an arc ignition protected zone (referred to as an 'arc free zone' in previous editions of the Technical report); - arc fault protection front, back and sides of an ASSEMBLY as the normal requirement; - minimum performance requirements for arc ignition protected zone.