3D Pic-Mcc Simulation of Particles Expansion for Two Kinds of Curved Contact and Butt Contact in the Post-Arc Phase

Curved contact is a vacuum interrupter contact structure with excellent in-terrupting performance. The process of post-arc dielectric recovery during the disconnection process is not yet clear. However, one-dimensional and two-dimensional Particle-In-Cell/Monte Carlo (Pic-Mcc) models cannot accurately describe this process. This article establishes a three-dimensional Pic-Mcc model for the dielectric recovery process after vacuum arc of curved contacts. Taking the butt contact as a reference, the particle diffusion pro-cess and particle characteristics of ruled curved contact and revolute curved contact in the post-arc phase were compared and analyzed. The results indi-cate that the curved electrode structure and larger electrode surface area are the main factors affecting the post-arc particle diffusion process.