Continued Investigation of Arc Flash in Single Phase Systems

2022 IEEE Industry Applications Society Annual Meeting (IAS) Pub Date : 2022-10-09 DOI:10.1109/IAS54023.2022.9940044

John F. Wade, P. Brazis, David W. Lambrecht

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引用次数: 1

Abstract

IEEE 1584 - 2018 documents the standard method for calculating arc flash incident energy. This value is then used to establish one of several safety boundaries around exposed, energized electrical conductors and to select protective equipment. While 1584 covers three-phase configurations in detail, it currently excludes single-phase calculations. Prevalence of single-phase AC power distribution inspired curiosity about possible hazards of fire and injury arising from arc flash in such systems. This paper extends work previously published and covers the conclusion of doctoral research into single-phase arc flash in one laboratory configuration. Further experimental work supported the hypothesis that incident energy would be low (less than 1 cal/cm2) for single-phase events below some threshold voltage and for available fault currents up to 22,000 amperes. This threshold voltage appears to be near 434VAC. Repeated test groups at greater than 434V sustained the conclusion that such configurations develop dangerous levels of heat and blast pressure even when the source is single-phase.

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单相系统电弧闪蒸的继续研究

IEEE 1584 - 2018记录了计算电弧闪光入射能量的标准方法。然后，该值用于在暴露的通电导体周围建立几个安全边界之一，并选择保护设备。虽然1584详细介绍了三相配置，但目前不包括单相计算。单相交流配电的普及激发了人们对这种系统中电弧闪光可能引起的火灾和伤害危险的好奇心。本文扩展了先前发表的工作，并涵盖了在一个实验室配置中单相电弧闪光的博士研究结论。进一步的实验工作支持这一假设，即对于低于某个阈值电压的单相事件和高达22,000安培的可用故障电流，入射能量将很低(小于1卡/平方厘米)。这个阈值电压似乎接近434VAC。在大于434V的反复测试组得出结论，即使是单相源，这种配置也会产生危险的热量和爆炸压力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 IEEE Industry Applications Society Annual Meeting (IAS)

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