Analýza silových účinků působících na proudovodnou dráhu 3f jističe při zkratu

Abstract

This thesis focuses on the analysis of electrodynamic forces acting on the current-carrying and contact parts of a low-voltage three-pole circuit breaker Siemens 3VT under short-circuit conditions. A highly accurate 3D model of the contact system was created using SolidWorks, faithfully representing the real construction of the device. This model serves as the basis for numerical analysis using the Finite Element Method (FEM) in ANSYS Maxwell, aimed at evaluating the spatial distribution of forces and their impact on the mechanical stability of the contacts. The thesis also includes an extensive theoretical part describing the operating principle of the circuit breaker, constructional and material characteristics, and the physical principles of electrodynamic forces. The work builds upon previous single-pole models and extends the analysis to a full three-phase system, providing a more comprehensive view of the force behavior under real operational conditions.