DC Arc Quenching Using Ablation of Polymer Narrow‐Section Arranged around Fuse Element

Abstract

This paper was arranged a polymer cylinder around a Cu fuse‐element to increase both an arc resistance during a DC arc quenching process and an insulation resistance after the DC arc quenching. The used polymer cylinder equips a narrow‐section with a width made from the polymer. A position of the narrow‐section was around an arc‐ignition point of the Cu fuse‐element. Silica‐sand (SiO2‐sand) was filled inside the polymer cylinder. Then, a damping DC with a prospective peak of 1000 A was energized to the Cu fuse‐element. As an experimental result, was successfully increased with of the narrow‐section. In addition, the rise in of the narrow‐section also increased to more than 10 under the DC 1000 V application after the arc quenching. In order to interpret rise and high under the polymer cylinder arrangement, chemical composition, an electrical resistivity , and a thermal diffusivity of Cu/SiO2/Polymer vapor mixture was also calculated. Based on the experimental result and calculation result, rise can be interpreted based on rise in and due to the polymer vapor admixing into Cu/SiO2 vapor mixture. In addition, increasing can also be interpreted by the polymer ablation of the narrow‐section of the cylinder. The results are useful to further increase the interruption capacity of the DC fuse. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.