In the circuit breaker, the actuator which generates the driving force, mainly effects on the successful operation. The existing Automatic Transfer Breaker (ATB) had applied motor spring actuator, but it had technical and economic limitations, such as need for continuous components exchanges and maintenance costs. In this paper, the spring actuator is replaced with Electromagnetic Force driving Actuator (EMFA), to overcome limits. Linkage system following EMFA is designed as three-link structure to gain the benefits in operational and designing respect. In order to obtain the dynamic characteristics of the EMFA, transient analysis is performed by combining the finite element method (FEM) and the time difference method (TDM). By comparing experimental data with simulated data, it is confirmed that the analysis of dynamic characteristics is appropriate.
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