某型塑壳断路器热过载保护机构仿真分析OA

For the actual equipment of a certain type of Molded Case Circuit Breaker,,the experimental verification of the operation value of the overloaded disconnect device was first conducted to comply with the national military standard.Subsequently,based on the the equipment specification,,actual measurements and theoretical calculation value,a finite element model of the conductive circuit was consdructed using ANSYS.After calculating the equivalent resistance and performing simulations,the temperature rise distribution and temporal variation under rated load were analyzed.By varying the input current,temperature rises under different overload conditions were investigated to determine the thermal overload verification time threshold,which was then compared with the experimental data.The thermal rise patterns of the conductive circuit under both reted and various overload current were obtained.The simulation-derived verification time setting value matched the experimental overload action value,thereby validating the model's accuracy.This provides a foundation for the simulation and verification of the similar equipment in the future.