Design of a vacuum contact pair for 660/1140 V switchgears used in underground mine power networks

Abstract

The vacuum contact pair located in interruption chamber (The vacuum contact pair) is the core component of switchgears used in mining power systems. The design and evaluation process of the vacuum contact pair are often influenced by empirical parameters. With the advancement of modern technology, the application of numerical simulation tools in vacuum contact pair design has significantly improved reliability and shortened the design time. This paper presents the analysis and design of a vacuum contact pair using the finite element method (FEM) implemented in ANSYS software. Experimental validation was conducted on a physical prototype to verify the theoretical results. The findings of this study provide a solid scientific basis for domestic manufacturers to develop and produce vacuum switchgears, contributing to the replacement of imported equipment for mining power systems.