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DC-Arc Models and Incident-Energy Calculations

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4 Author(s)
Ammerman, R.F. ; Colorado Sch. of Mines, Golden, CO, USA ; Gammon, T. ; Sen, P.K. ; Nelson, J.P.

There are many industrial applications of large-scale dc power systems, but only a limited amount of scientific literature addresses the modeling of dc arcs. Since the early dc-arc research focused on the arc as an illuminant, most of the early data was obtained from low-current dc systems. More recent publications provide a better understanding of the high-current dc arc. The dc-arc models reviewed in this paper cover a wide range of arcing situations and test conditions. Even with the test variations, a comparison of dc-arc resistance equations shows a fair degree of consistency in the formulations. A method for estimating incident energy for a dc arcing fault is developed based on a nonlinear arc resistance. Additional dc-arc testing is needed so that more accurate incident-energy models can be developed for dc arcs.

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Industry Applications, IEEE Transactions on  (Volume:46 ,  Issue: 5 )