火灾条件下电线电缆的试验 电路完整性 第4部分：高于1 kV至及包括30 kV电压等级电线电缆在至少830 °C温度冲击下的火焰试验方法

[中文适用范围]： 本部分IEC 60331系列规定了测试装置和程序，并给出了额定电压高于0.6/1.0 kV至包括18/30 kV的电力电缆在规定的火灾和机械冲击条件下保持电路完整性的性能要求，包括推荐的火焰施加时间和火焰温度。 本文件中的测试方法仅限于导体尺寸不超过120 mm²的情况。120 mm²尺寸导体的构造测试结果适用于相同电缆构造的更大横截面。 对于预组装的3芯电缆，当电缆的完整单芯经过测试时，整个电缆被视为已测试。 本文件包括与额定电压高于0.6/1.0 kV至包括18/30 kV的电力电缆相关的特定故障点、连续性检查安排、测试样品、测试程序和测试报告的详细信息。 附录A提供了用于测试的燃烧器和控制系统的验证方法。附录B提供了推荐的测试装置的选择。 附录C提供了使用水喷雾或水喷射协议的指导（可选）。 附录D提供了适用于特殊应用的1000°C火焰温度（可选）。 规定了可以可选地标记在电缆上的标识要求，以表示符合本文件。 本组安全出版物主要用作产品安全标准，适用于额定电压高于1 kV至包括130 kV的电力电缆在火灾条件下的电路完整性安全测试方法，但也适用于技术委员会（TCs）根据IEC指南104和ISO/IEC指南51中规定的原则，为本组安全出版物范围中提到的类似产品准备出版物。 技术委员会的责任之一是，在适用的情况下，在其出版物的准备中使用BSPs或GSPs，或两者兼而有之。 警告：本文件中给出的测试可能涉及使用危险电压和温度。应采取适当的预防措施，以防止可能产生的电击、灼伤、火灾和爆炸风险，以及可能产生的有害烟雾。 [外文原描述]： IEC 60331-4:2024 specifies the test apparatus and procedure, and gives the performance requirements, including recommended flame application times and flame temperatures, for power cables of rated voltage higher than 0,6/1,0 kV up to and including 18/30 kV for maintaining circuit integrity when subject to fire and mechanical shock under specified conditions. The test method in this document is restricted to conductor sizes up to and including 120 mm2. The test results for 120 mm2 size conductors constructions qualify larger cross-sections of the same cable construction. In the case of preassembled three-core cables, then the complete cable is considered as tested when a complete single-core of the cable has been tested. This document includes details for the specific point of failure, continuity checking arrangement, test sample, test procedure and test report relevant to electric power cables with a rated voltage higher than 0,6/1,0 kV up to and including 18/30 kV. Annex A provides the method of verification of the burner and control system used for the test. Annex B provides a choice of the recommended test apparatus. Annex C provides, as an option, guidance for using either water spray or water jet protocols. Annex D provides, as an option, the flame temperature of 1 000 °C, which is applicable for special applications. Requirements are stated for an identification that can optionally be marked on the cable to signify compliance with this document. This group safety publication focusing on the test method for circuit integrity safety for power cables of rated voltage higher than 1 kV up to and including 30 kV under fire conditions, is primarily intended to be used as a product safety standard for the products mentioned in the scope, but is also intended to be used by TCs in the preparation of publications for products similar to those mentioned in the scope of this group safety publication, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51. One of the responsibilities of a TC is, wherever applicable, to make use of either BSPs or GSPs, or both, in the preparation of its publications. WARNING – The test given in this document can involve the use of dangerous voltages and temperatures. Suitable precautions should be taken against the risk of shock, burning, fire and explosion that can arise, and against any noxious fumes that can be produced.