Experiment and Simulation Research on the Influence of Different Main Contact System on the Interruption Performance of Control and Protective Switch

Research on the interruption process of control and protective switch devices (CPS) is helpful for improving its current-limiting performance. Three different structures of the main contact system are proposed and experimentally investigated on their influence on CPS´s interruption performance first. Then, a calculation model that enables us to simulate the interruption process of a low-voltage apparatus with a complex mechanical structure is realized by carrying out the second development of ADAMS, in which a set of differential equations describing the coupling of complex mechanical movements, electric circuits, magnetic fields, and dynamic mathematic arc models is constructed. With this model, further investigations on the interruption process, arc movement, and arc characteristic variation of CPS with the three main contact systems are carried out. The improvement mechanism of the current-limiting performance of CPS using an arc run-on plate is especially analyzed with the calculation model.