A switchgear, in particular a circuit protection device, includes: a housing; a fixed contact that is fixed to the housing; a movable contact, the movable contact being arranged on a contact arm that is arranged in the switchgear so as to be movable; a latching device that is connected to the contact arm; a manual actuation device that has an actuation projection, which manual actuation device is connected to the latching device by a bar, the movable contact being brought into contact with the fixed contact when the actuation projection is moved from an off-position of the actuation projection to an on-position of the actuation projection. When the actuation projection is moved from the on-position towards the off-position as far as a specified trip position of the actuation projection, the bar remains still. When the projection is moved past the trip position, the bar is moved past a holding point.

A switching mechanism of a circuit breaker includes a case, a handle rotatably coupled to a side plate fixed to the case, a U-pin coupled to a lower portion of the handle, a lever coupled to the U-pin, and a crossbar disposed in a mounting portion protruding from the case to be perpendicularly movable, the crossbar being moved by receiving contact pressure of the lever, wherein the lever is provided with a contact pressure portion formed in a curved surface on a lower surface thereof, to press the crossbar perpendicularly downward upon closing a circuit.

The present disclosure discloses a miniature circuit breaker operating mechanism and a miniature circuit breaker. The operating mechanism includes an operating handle and a lock catch. The operating handle and the lock catch are separately rotatably connected to a circuit breaker housing. The operating mechanism further includes: a first connecting rod, which is rotatably connected with the circuit breaker housing, and the rotating shaft of the first connecting rod and the rotating shaft of the lock catch shares the axis or on the same axis; a moving contact is arranged on the first connecting rod; a second connecting rod; the second connecting rod is connected with the operating handle, and the second connecting rod, the lock catch and the first connecting rod cooperate with a linkage structure.

An energy storage operation mechanism for a circuit breaker comprises a side plate assembly, a connecting rod assembly, a cam assembly, an energy storage assembly, a rotating shaft assembly and a control assembly. A rotatable driving shaft is mounted in the side plate assembly. The connecting rod assembly and the cam assembly are mounted on the driving shaft. The energy storage assembly and the rotating shaft assembly are mounted at one side of the driving shaft, and the control assembly is mounted at the other side of the driving shaft. The connecting rod assembly is connected with the rotating shaft assembly. The cam assembly can be in contact and connection with the energy storage assembly to push the energy storage assembly to store energy. The control assembly can be connected with the connecting rod assembly and the cam assembly in a latching manner. The energy storage operation mechanism for the circuit breaker, which is provided by the present invention, is compact in structure and high in reliability.

A high current fusible disconnect switch device includes a switch housing configured to receive a pluggable touch-safe fuse module, and a dual slide bar actuator assembly for opening and closing switch contacts. The dual slide bar elements are each coupled to bias elements that store and release energy to affect switch opening and closing operations. The switch opening and closing operation is multi-staged wherein the only the first slider element is movable in the first stage, and both the first and second slider elements are movable in the second stage.

An electronic protection device for a LV electric line including at least a phase conductor and a neutral conductor, comprising: input terminals and output terminals, at which said electronic protection device is electrically connected respectively with an electric power source and with an electric load through said phase and neutral conductors; a control unit comprising a controller including data processing resources; one or more pairs of main contacts electrically connected with corresponding one or more input and output terminals and adapted to be mutually coupled or separated; one or more pairs of auxiliary contacts electrically connected with corresponding one or more input terminals and with said control unit and adapted to be mutually coupled or separated; a handle movable in a first position corresponding to a closed state of said electronic protection device, in a second position corresponding to a tripped state of said electronic protection device or in a third position corresponding to an open state of said electronic protection device; an operating mechanism adapted to operate said main contacts, said auxiliary contacts and said handle; a tripping unit adapted to actuate said operating mechanism in response to an activation by said control unit. Said main contacts and said auxiliary contacts are coupled when said electronic protection device is in said closed state with said handle in said first position. Said main contacts are separated and said auxiliary contacts are coupled when said electronic protection device is in said tripped state with said handle in said second position. Said main contacts and said auxiliary contacts are separated when said electronic protection device is in said open state with said handle in said third position.

The present disclosure relates to a circuit breaker, and more particularly, to a switching mechanism of a circuit breaker. A switching mechanism of a circuit breaker according to one embodiment of the present disclosure includes a case, a handle rotatably coupled to a side plate fixed to the case, a U-pin coupled to a lower portion of the handle, a lever coupled to the U-pin, and a crossbar disposed in a mounting portion protruding from the case to be perpendicularly movable, the crossbar being moved by receiving contact pressure of the lever, wherein the lever is provided with a contact pressure portion formed in a curved surface on a lower surface thereof, to press the crossbar perpendicularly downward upon breaking a circuit.

An electrical installation switching device has an insulating material housing; a switching knob protruding beyond the housing on a housing front face and able to pivot between a switched-on and switched-off position about a first pivot axis; a magnetic short circuit current and/or a thermal excess current trigger; a contact site formed from a fixed and a moveable contact piece, a switching lock having a latching site and being triggerable by an excess and/or short circuit current using the trigger when unlatching the latching site; an operator pivotable between a release and an operating position about a second pivot axis, aligned parallel to the first pivot axis, switching knob having an operating contour, the operator and operating contour cooperating by triggering the switching lock using the trigger when the operator pivots about the second pivot axis to hold the knob in an intermediate position between the on and off position.

A test button loop device that includes an elastic button and a conductive member forming a test loop. The elastic button includes a contact portion matched with the conductive member, and a button member pressing the contact portion. The conductive member is linked with a handle mechanism or an operating mechanism or a moving contact of a circuit breaker, which drives the conductive member to approach the contact portion when the circuit breaker is closed, and the button member in this state can drive the contact portion to contact the conductive member to switch the test loop on. The handle mechanism or the operating mechanism or the moving contact of the circuit breaker drives the conductive member away from the contact portion when the circuit breaker is opened, and the button member in this state can will not be able to contact the conductive member.

An operating mechanism of a circuit breaker comprising a static contact, a movable contact provided on a contact support and an operating handle that is in linkage with the contact support; a rotation shaft of the movable contact is concentric with a rotation shaft of the contact support, and the movable contact and the contact support are fixedly connected via an elastic component; the movable contact is capable of rotating relative to the contact support. The operating mechanism improves the response velocity of the movable contact.