1. DC Arc Quenching Using Ablation of Polymer Narrow‐Section Arranged around Fuse Element.
- Author
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Kodama, Naoto, Yokomizu, Yasunobu, Takenaka, Waku, Iwata, Mikimasa, and Danish, M. S. S.
- Subjects
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ELECTRICAL resistivity , *COPPER , *THERMAL diffusivity , *FLASHOVER - Abstract
This paper was arranged a polymer cylinder around a Cu fuse‐element to increase both an arc resistance rarc$$ {r}_{\mathrm{arc}} $$ during a DC arc quenching process and an insulation resistance Rins$$ {R}_{\mathrm{ins}} $$ after the DC arc quenching. The used polymer cylinder equips a narrow‐section with a width wP$$ {w}_{\mathrm{P}} $$ 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, rarc$$ {r}_{\mathrm{arc}} $$ was successfully increased with wP$$ {w}_{\mathrm{P}} $$ of the narrow‐section. In addition, the rise in wP$$ {w}_{\mathrm{P}} $$ of the narrow‐section also increased Rins$$ {R}_{\mathrm{ins}} $$ to more than 10 MΩ$$ \mathrm{M}\Omega $$ under the DC 1000 V application after the arc quenching. In order to interpret rarc$$ {r}_{\mathrm{arc}} $$ rise and high Rins$$ {R}_{\mathrm{ins}} $$ under the polymer cylinder arrangement, chemical composition, an electrical resistivity ρ$$ \rho $$, and a thermal diffusivity α$$ \alpha $$ of Cu/SiO2/Polymer vapor mixture was also calculated. Based on the experimental result and calculation result, rarc$$ {r}_{\mathrm{arc}} $$ rise can be interpreted based on rise in ρ$$ \rho $$ and α$$ \alpha $$ due to the polymer vapor admixing into Cu/SiO2 vapor mixture. In addition, increasing Rins$$ {R}_{\mathrm{ins}} $$ 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. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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