Abstract: An arc chamber for a low voltage switching device including an insulating casing, having a first and a second lateral walls, a rear and a front wall, that defines an internal space housing a number or arc-breaking plates, a top wall of the casing having a discharge opening for venting off the gases from the internal space, the discharge opening being covered by a top cover. The arc chamber for a low voltage switching device includes a filter made of an open cell metal foam that is positioned at the discharge opening.

Abstract: A circuit breaker includes a first fixed contact and a first movable contact which can be switched between a closed status and a tripped status, a signaling device for signaling when the circuit breaker is in a tripped status, a trip actuator movable from an initial position to an end-stroke position when the first movable contact is switched from the closed status to the tripped status, a tripping bar which is connected to the first movable contact so as when the trip actuator moves from the initial position, the tripping bar moves and triggers switching of the first movable contact from the closed status into the tripped status, and a trip member having a single-piece shaped body, which includes a first portion actuated by the trip actuator, a second portion spaced apart from the first portion, and a third portion spaced apart from the first and second portions.

Abstract: A terminal clamp cover device for low voltage circuit breakers, in particular for molded case circuit breakers, having one or more phases, each provided with a terminal for the electrical connection of the circuit breaker, a clamp for the connection of the terminal to an electrical circuit and a vent opening to discharge the gases produced in the circuit breaker during opening/closing operations. The device includes an insulating body that covers the clamp, the insulating body being provided on at least one portion of its outer surface with a plurality of heat dissipating elements. A low voltage circuit breaker, in particular a low voltage molded case circuit breaker, including a device of the type described also forms part of the application.

Abstract: An arc chamber 10, 20, 30, 40, 50 for a low voltage switching device comprising an insulating casing 1, having a first and a second lateral walls 2,3, a rear and a front wall 4,5, that defines an internal space housing a number of arc-breaking plates, a top wall 6 of said casing having a discharge opening 101 for venting off the gases from said internal space, said discharge opening 101 being covered by a top cover 7, 37, 47, 57. The arc chamber for a low voltage switching device comprises a filter 11, 21, 31, 41, 51 made of an open cell metal foam is positioned at said discharge opening 101.

Abstract: A circuit breaker including: a first fixed contact and a first movable contact which can be switched between a closed status where they are coupled to each other and a tripped status where they are separated from each other; a signaling device for signaling when the circuit breaker is in a tripped status; a trip actuator movable from an initial position to an end-stroke position when the first movable contact has to be switched from the closed status into the tripped status; a tripping bar which is connected to the first movable contact so as when the trip actuator moves from the initial position, the tripping bar moves and triggers switching of the first movable contact from the closed status into the tripped status; and a trip member having a single-piece shaped body which includes: a first portion interacting with and actuated by the trip actuator to move from a rest position towards an actuated position when the trip actuator moves from the initial position; a second portion which is spaced apart from the

Abstract: A terminal clamp cover device for low voltage circuit breakers, in particular for molded case circuit breakers, having one or more phases, each provided with a terminal for the electrical connection of the circuit breaker, a clamp for the connection of the terminal to an electrical circuit and a vent opening to discharge the gases produced in the circuit breaker during opening/closing operations. The device includes an insulating body that covers the clamp, the insulating body being provided on at least one portion of its outer surface with a plurality of heat dissipating elements. A low voltage circuit breaker, in particular a low voltage molded case circuit breaker, including a device of the type described also forms part of the application.