With the utilization of DC systems increasing, and constant emphasis for worker safety as a top priority for all companies, arc flash feasibility for DC systems is a growing concern. This article details the feasibility of DC arc flash events with experimental scouting tests for a 130 VDC system. Sensitivity studies are experimentally performed on the impact of bus gap distance and bolted fault current level on incident energy. Test results are analyzed and conclusions drawn on the results, in particular incident energies. Details of the tests performed including the setup, procedure, and system parameters are also provided. Theoretical methods of determining incident energy for the testing conditions are also explored. Specifically, these are Doan's and NFPA 70E's maximum power models, and Stokes and Oppenlander's and Paukert's arc resistance models. A comparative analysis of the test results to industry standard, NFPA 70E, and software analysis methods using ETAP, an industry leading software used for arc flash studies, is performed.

中文翻译：

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实验性直流电弧闪光结果与工业估算方法的比较分析

随着直流系统利用率的提高以及对员工安全的持续重视成为所有公司的重中之重，直流系统电弧闪光的可行性日益受到关注。本文详细介绍了通过130 VDC系统的实验侦察测试进行DC弧闪事件的可行性。对总线间隙距离和螺栓故障电流水平对入射能量的影响进行了敏感性研究。分析测试结果，并根据结果得出结论，尤其是入射能量。还提供了执行的测试的详细信息，包括设置，过程和系统参数。还探讨了确定测试条件下入射能量的理论方法。具体来说，这些是Doan和NFPA 70E的最大功率模型，以及Stokes和Oppenlander和Paukert的最大功率模型。s电弧电阻模型。使用行业领先的电弧闪光研究软件ETAP对测试结果与行业标准NFPA 70E和软件分析方法进行了比较分析。