Research on Opening and Closing Process for Outdoor Vacuum Circuit Breaker Contacts

Abstract

As is known that the vacuum circuit breaker contact materials of breaking capacity and welding performance are affected by the mechanical properties and fracture characteristics of contact material, but they haven't been paid attention now. The mechanical failure for circuit breaker contact wear is studied and the process characteristics are described for contact opening and closing. When the thermal stress analysis for the moving contact is finished, the displacement and stress cloud map can be gotten by the thermal deformation of moving contact. When the crash analysis for the static and moving contact is finished, the deformation of contact can be gotten. In this analysis, a reference will be provided for the same type of circuit breaker contacts designed in the future and some relevant measures can be taken to prolong the mechanical life of breakers.