ABSTRACT:Miniature circuit breakers, one kind of protective electrical apparatus, are mainly used in household and industrial installations and distribution system for overload and short circuit protection. Their reliability level directly influences the power supply in house and industrial installations the safety of facilities in distribution system, so the failure of miniature circuit breakers will result in/cause extremely serious loss.
In this paper, mainly designed is 16A miniature circuit breakers, the base drawing lessons from external same produce design idea and the analysis prototype of a machine being living is get off, the magnetic field that the three dimensions finites element based on were analyzed electromagnetism system inside distributes, and adopts the ANSYS software to the exchange breaker electromagnetic system to have carried on optimization and design, selecting the most splendid design scheme design. The main substances designed are: Contact finger system design together with calculation, put out arc system design together with calculation and electromagnetism system design together with calculation.