The invention discloses a large-current modular molded case
circuit breaker, comprising a shell, an arc extinguishing
assembly, a contact
assembly, a rotating shaft and an operating mechanism; the shell comprises a base, an upper cover and a cover, the operating mechanism and the rotating shaft are both detachably mounted on the top of the upper cover, and a plurality of groups of moving contacts and a plurality of groups of static contacts are respectively detachably mounted in a receiving cavity between the base and the upper cover, the rotating shaft is movably connected with the plurality of groups of moving contacts and the operating mechanism through a
crank arm structure, and the molded case
circuit breaker adopting the technical solution realizes modularization and convenient installation of the operating mechanism, the rotating shaft and the moving contact through reasonable optimization
layout and design of components such as the operating mechanism, the rotating shaft and the moving contact, simplifies the installation structure, reduces the installation difficulty, is convenient for product disassembly,
assembly and maintenance, saves assembly time, improves assembly efficiency, reduces production costs, and is conducive to
mass production and assembly of products.