Simulation Research on Optimization Design of Magnetic Release Used in Circuit Breaker

Circuit breaker needs to cut off fault current reliably, which asks for a trigger to make operating mechanism acting. Magnetic release is widely applied in the operating mechanism as trigger. When Magnetic release breaks down, the operating mechanism will refuse to work, and opening failure of circuit breaker will occur. Therefore, the performance of magnetic release is important for the reliability of circuit breaker. In this paper, a optimization research of magnetic release is conducted, which aims at optimizing the structure of yoke iron to increase the electromagnetic force of magnetic release. It is found that reducing yoke iron length can improve the electromagnetic force characteristics of magnetic release.