Abstract：Taking the contact terminate force of molded case circuit breaker as the optimization objective, based on the computer aided tolerance analysis, the stress analysis, dimension sensitivity analysis and weight analysis are introduced to optimize the relative dimension tolerance and the stiffness coefficient of the contact terminate force. The analysis results show that, compared to the previous theory only nominal force value, after considering the stress tolerance analysis, calculation of force not only has theoretical value, but also the tolerance range, and according to the current process, put forward the improvement scheme to optimize the contact terminate force.
2018, Vol. 19 
