기중차단기(Air Circuit Breaker)의 전자반발력 해석을 통한 접압스프링 설계

Design of Wipe Spring in ACB by Numerical Analysis of Electromagnetic Repulse Forces

  • Kang, J.S. (Electrotechnology R&D Center, LG Industrial Systems Co., Ltd.) ;
  • Sohn, J.M. (Electrotechnology R&D Center, LG Industrial Systems Co., Ltd.) ;
  • Choe, W.J. (Electrotechnology R&D Center, LG Industrial Systems Co., Ltd.) ;
  • Lee, B.W. (Electrotechnology R&D Center, LG Industrial Systems Co., Ltd.) ;
  • Seo, J.M. (Electrotechnology R&D Center, LG Industrial Systems Co., Ltd.)
  • 발행 : 1999.07.19

초록

It is necessary for the optimum design of switching devices to calculate repulsion forces acting on the closed electric contacts flowing over-current, e.g. inrush current and overload currents. In this paper, the forces generated by currents and flux densities at the contact point when circuit breakers are in closed position are obtained by using 3D finite element method. According to the analysis, the optimum configuration of wipe springs and arc extinguishing chambers are newly designed and consequently type tests show satisfactory results.

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