PROJECT TITLE :

DC Current Limitation Principle Using a Helical Arc Arrangement

ABSTRACT:

The enlargement of a helical arc confined between polymeric helical blades is ruled by both electromagnetic and aerodynamic forces. These arise thanks to advanced interactions between the individual arc turns, arc helical blade interactions, and surrounding media. These interactions can be exploited to manage the speed of enlargement. Throughout this enlargement stage, there is a considerable increase in arc voltage that, in low voltage (LV) systems, will limit the current, thereby probably approaching current interruption provided that the arc quenching conditions are suitable. In this investigation, current limiting properties of different mixtures and sizes of helical blades (metal and polymer) were studied experimentally. Marginal improvement in current-limiting properties was found upon substituting (two) outer polymeric blades with copper. Increasing the blade count was conjointly beneficial. Blade size was, however, the foremost significant issue for enhancing arc control and current limitation-3 massive polymer blades outperforming all smaller blades-even with less blade space.


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