The invention discloses an electric leakage
circuit breaker, and relates to the technical field of circuit breakers. The electric leakage
circuit breaker comprises a shell that is provided with an L-pole incoming and outgoing line column, an N-pole incoming and outgoing line column, a magnetic
tripping mechanism, an operating mechanism, a thermal
tripping mechanism, and an arc extinguishing
system. The operating mechanism is connected with one end of a
tripping frame; the other end of the tripping frame is connected with an L-pole moving contact and an N-pole moving contact; a rotating wheel is located under the tripping frame and connected with one end of a moving
contact pressure spring, and one side of the other end of the moving
contact pressure spring is connected with one end of theL-pole moving contact; the other side of the other end of the moving
contact pressure spring is connected with one end of the N-pole moving contact; the other end of the L-pole moving contact is in separable contact with the L-pole static contact; and the other end of the N-pole moving contact is in separable contact with the N-pole static contact. Aiming at the technical problem that secondary arcing is formed due to incomplete arc extinguishing of a
circuit breaker in the prior art, an arc extinguishing rib is arranged on an N pole, the product space design is optimized, and an electric arccan be effectively isolated and extinguished.