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 circuit breaker includes a housing, a fixed contact mounted in the housing, a pivot member arranged in the housing, and a pivoting arm moveably mounted in the housing. The pivoting arm includes a moveable contact. The pivoting arm is rotatable about and translatable relative to the pivot member to selectively engage and disengage the fixed and moveable contacts.

A toggle link apparatus for a circuit breaker. The toggle link apparatus has an open-slotted end including a pivot feature and a stop feature opposite the pivot feature that limits motion of a connected cradle upon a tripping event. Toggle link assemblies of a circuit breaker, trip mechanism assemblies, and method of operating a trip mechanism of a circuit breaker are also provided, as are other aspects.

An electronic protection device (1) for a LV electric line (100) including at least a phase conductor (P) and a neutral conductor (N), comprising: input terminals (IN) and output terminals (OUT), at which said electronic protection device is electrically connected respectively with an electric power source (SC) and with an electric load (LD) through said phase and neutral conductors (P, N); a control unit (3) comprising a controller (31) including data processing resources; one or more pairs of main contacts (2) electrically connected with corresponding one or more input and output terminals (IN, OUT) and adapted to be mutually coupled or separated; one or more pairs of auxiliary contacts (4) electrically connected with corresponding one or more input terminals (IN) and with said control unit (3) and adapted to be mutually coupled or separated; a handle (8) movable in a first position (ON) corresponding to a closed state of said electronic protection device, in a second position (TRIP) corresponding to a tripped state of said electronic protection device or in a third position (OFF) corresponding to an open state of said electronic protection device; an operating mechanism (5) adapted to operate said main contacts, said auxiliary contacts and said handle; a tripping unit (6) adapted to actuate said operating mechanism (5) in response to an activation by said control unit. Said main contacts (2) and said auxiliary contacts (4) are coupled when said electronic protection device is in said closed state with said handle (8) in said first position (ON). Said main contacts (2) are separated and said auxiliary contacts (4) are coupled when said electronic protection device is in said tripped state with said handle (8) in said second position (TRIP). Said main contacts (2) and said auxiliary contacts (4) are separated when said electronic protection device is in said open state with said handle (8) in said third position (OFF).

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 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.

A circuit interrupter having a moveable contact arm that forms part of the linkage assembly that connects to the handle. The moveable contact arm positioned essentially vertically in the circuit interrupter housing and positioned such that any arc that develops is drawn in a direction away from the moveable contact arm. The moveable contact arm moveable about two pivot points when the contacts are opening and closing, one of the two pivots positioned in a curved channel to slidingly move in the channel during opening and closing.

A switching device has a housing-mounted contact and a movable contact. The movable contact is provided for making contact with the housing-mounted contact. The switching device has a switch lock with a latch and a latch support, wherein the latch support has a latching location for latching the latch to the latch support, wherein the switching device furthermore has a hand switching lever. A connecting rod is mounted movably on the latch support, the connecting rod bearing against a projection of the hand switching lever when the hand switching lever is arranged in the position in which the contacts are in contact. An actuation of the hand switching leverfor separating the movable contact from the housing-mounted contactmoves the connecting rod and thereby releases the latching of the latching support to the latch.

A circuit breaker protects an electric low-voltage circuit and has: a) a mechanical separating contact unit which is connected to an electronic interruption unit in series, the mechanical separating contact unit has a handle for opening a contact in order to prevent a current flow or for closing the contact for a current flow in the low-voltage circuit; and b) a controller which is connected to the mechanical separating contact unit and the electronic interruption unit. The circuit breaker is configured such that a process for interrupting the current flow in the low-voltage circuit by the mechanical separating contact unit and/or the electronic interruption unit is initiated if current thresholds or current/time thresholds are exceeded. The circuit breaker is also configured such that the contact of the mechanical separating contact unit can be closed by the handle only after a release signal for closing the contact is provided.