Abstract:

In power distribution systems,molded case circuit breaker(MCCB) play a role in protecting the short-circuit current of line.However,when using this traditional tripping method(screw tube type and rotary snap on type) to achieve protection against short-circuit current,the power distribution structure cannot flexibly change with the load.Therefore,the design points of the structure of the magnetic adjustable electromagnetic release is described.Based on Ansys software,the static and dynamic characteristics of the electromagnetic release are analyzed,and the design results are verified through simulation examples and experiments.The reliability of the magnetic adjustable electromagnetic release is verified,and the overcurrent protection performance of the molded case circuit breaker is improved.

Key words: molded case circuit breaker, electromagnetic release device, design, simulation