DC arc flash calculations — Arc-in-open-air & arc-in-a-box — Using a simplified approach (Multiplication factor method)
DC arc flash calculations — Arc-in-open-air & arc-in-a-box — Using a simplified approach (Multiplication factor method)
复制标题
直流电弧闪光计算 - 露天电弧和盒子内电弧 - 使用简化方法（乘法因子法）
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
P. Walsh
中科院分区：
文献类型：
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作者：
M. Fontaine;P. Walsh
本文提出了一种计算直流系统中存在弧箱情况下的入射能量和弧闪边界距离的方法。该方法使用直流最大功率法和乘法因子，而不是使用距离指数。该方法也可用于露天电弧，其乘数为1。它的基本假设是，球面能量密度可以增加到新值，以考虑箱体情况下的额外反射热辐射，并且新值与球面能量密度的比率等于一个乘数，以便根据简化的方程或方法，将露天弧光情况的能量密度修正为箱内弧光。在计算AFB时，该方法需要使用迭代过程，因为乘数是一个非线性变量，并且基于到圆弧的距离。本文应该为进一步讨论和发展直流弧箱情况提供一个很好的起点。
This paper suggests a method for calculating the incident energy and the arc flash boundary (AFB) distance for dc systems when an arc-in-a-box situation is involved. The method uses the dc maximum power method and a multiplying factor instead of using distance exponents. The method may also be used for an arc-in-open-air by using a multiplying factor of 1. It is based on the basic assumption that the spherical energy density can be increased to a new value to account for the additional reflected heat radiation from a box situation and that the ratio of the new value to the spherical energy density equals a multiplying factor for correcting - from the energy density for an arc-in-open-air situation to an arc-in-a-box situation, based on a simplified equation or methodology. When calculating the AFB, the method requires the use of an iterative process, since the multiplying factor is a nonlinear variable and is based on the distance from the arc. This paper should provide a good starting point for further discussion and development regarding dc arc-in-a-box situations.