Magnetic Switch Mechanism for Circuit Breakers

Nowadays, motor starter combinations for tool-less plug connection or compact starters are used to ensure safe operation of electric motors in industrial applications. According to requirements these types of devices have separate actuators for driving the main contacts for motor protection and operational switching. In our study, we present a new magnetic actuator for frequent normal switching, fast circuit breaking and resetting after tripping as well. The actuator has been designed using simulation models for system design and design optimization in form of coupled multi-domain network models of the actuator system and finite element models of the magnetic circuit. Prototype actuators were designed, assembled and experimentally characterized.