Answer:
Molded case circuit breaker, also known as device type circuit breaker, seals all parts in the plastic shell. Auxiliary contacts, undervoltage release and shunt release are mostly modular. As the structure is very compact, the molded case circuit breaker can hardly be overhauled. The operation is mostly manual, and the electric opening and closing can be used for large capacity. Molded case circuit breakers are generally used as protection switches for branches.
