Knowledge

DC MCB Structure and Principles



The circuit breaker has features of beautiful appearance, small size, light weight, quick release and rail installation. It’s case and components has adopted high retardant and impact-resistant plastic with good quality and high reliability. 


The breaker consists of shell, handle, operating mechanism, contact system, thermal release, magnetic release and arcing shield. When the breaker is wtiched on, the bimetal is heated and deformed, when current overlod reaches a certain level, the deformation of bimetal pushes the release, when a short-circuit current is going through the release, the electronmagnetic system is immediately push release, which protect the electrical equipment.