Residual current operated circuit breaker

The utility model provides a residual current operated circuit breaker, includes base and upper cover, thereby the upper cover install on the base shell structure who forms the circuit breaker, be equipped with two wiring portions and last die cavity respectively at the both ends and the middle part of upper cover, be equipped with the baffle between wiring portion and last die cavity, there is the clearance between the both ends of baffle and the last lateral wall of upper cover, is equipped with the protruding muscle in location on the side of last lateral wall, the protruding muscle in location with correspond the positioning groove who sets up on the side of base lateral wall and cooperate. The utility model discloses a set up matched with positioning groove and the protruding muscle in location between base and upper cover to improve installation reversal phenomenon, guaranteed dustproof ability, set up the clearance between the last lateral wall through both ends at the baffle and upper cover, thereby w