Clearing Time Considerations for DC ARC Flash Hazard Analysis of Battery Banks

Kyle D. Carr
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引用次数: 2

Abstract

Since empirical calculation methods of Arc Flash for DC systems are not yet available, several types of models and equation approaches are available for use with varying degrees of success in estimating a conservative thermal incident energy estimate for DC power systems. One of the undetermined variables for any of these calculations is the clearing time of any protective devices that may relate to the system configuration. The utility of the arcing currents derived from the DC arc flash calculation methods available does not always correlate well with estimating realistic clearing times for protective devices. This paper reviews the various commonly used calculation methods and proposes approaches for bracketing usable clearing times for calculations based on Time-Current Curves (TCC) for typical protective devices used in industry for battery banks. The methods used are directly applicable to other DC systems if the appropriate clearing time information and voltage current curves for non-linear are available.
蓄电池组直流电弧闪蒸危害分析的清除时间考虑
由于直流系统电弧闪络的经验计算方法尚不可用,几种类型的模型和方程方法可用于估计直流电源系统的保守热入射能量,并取得了不同程度的成功。任何这些计算的未确定变量之一是可能与系统配置相关的任何保护装置的清除时间。现有直流电弧闪络计算方法得出的电弧电流的效用并不总是与估计保护装置的实际清除时间很好地相关。本文综述了各种常用的计算方法,并提出了基于时间-电流曲线(TCC)计算工业中典型蓄电池组保护装置可用清除时间的方法。如果有适当的清除时间信息和非线性的电压电流曲线,所采用的方法直接适用于其他直流系统。
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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