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http://dx.doi.org/10.4313/JKEM.2015.28.10.630

Reduction of the Electric Field Concentration at the Triple Junction of the Vacuum Interrupter by Using the Application of Functionally Graded Material  

Choi, Seung-Kil (Department of Electrical Engineering, Shin Ansan University)
Gu, Chi-Wuk (R&D Center, Vitzrotech Co., Ltd.)
Ju, Heung-Jin (R&D Center, Vitzrotech Co., Ltd.)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.28, no.10, 2015 , pp. 630-635 More about this Journal
Abstract
A vacuum Interrupter (VI), a core part that composes the breaking part of medium-voltage vacuum circuit breaker (VCB), has the excellent insulation performance and arc-extinguishing capability. $SF_6$ gas had been used for the external insulation of VIs since the dielectric strength of $SF_6$ gas is superior to that of other insulation gases. However, because of environmental problems related with global warming, a solid-insulated technology was recently researched. The functionally graded material (FGM), as changing spatially the distribution of the relative permittivity inside an insulator, can reduce the electric field stress at the specific region. Especially, the external insulation performance of the VI with the molded FGM insulator is greatly improved as compared with that of the existing VI or the VI with a new external shield. In this paper, the effectiveness of this FGM insulator is verified by the numerical simulation.
Keywords
Vacuum interrupter; External insulation; Functionally graded material; Numerical simulation;
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Times Cited By KSCI : 1  (Citation Analysis)
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