Described herein is a low voltage switching device including: one or more electric poles having one or more movable contacts and corresponding fixed contacts adapted to be coupled to or uncoupled from each other; a movable contact assembly including said movable contacts and a main supporting and operating shaft reversibly movable between a first contact position, at which said movable contacts and said fixed contacts are uncoupled, a second contact position, at which said movable contacts and said fixed contacts are coupled, and a third contact position, at which said movable contacts and said fixed contacts are coupled and kept pressed; an operating assembly including a handle mechanism having a handle adapted to be reversibly moved by a user or a motor operated actuator (MOE) between a first, open position and a second, closed position; and a driving assembly operatively connected to said operating assembly.

A circuit interrupter includes a handle, an operating linkage, and a spring that are situated on a housing, with the spring extending between the handle and the operating linkage. The circuit interrupter is movable among an ON position, an OFF position, and a TRIP position, and the operating linkage includes a contact arm that is pivotable with respect to the housing to move a movable contact between an OPEN position and a CLOSED position with respect to a stationary contact. The handle has a toggle point, and when the spring is situated at a first side of the toggle point, the spring biases the contact arm to the ON position. When the spring is situated at a second side of the toggle point, the spring biases the contact arm to the OFF position or the TRIP position.

A low voltage switching device including: one or more electric poles having one or more movable contacts and corresponding fixed contacts adapted to be coupled to or uncoupled from each other, a movable contact assembly including the mobile contacts and a main supporting and operating shaft reversibly movable between a first contact position, at which the movable contacts and the fixed contacts are uncoupled, a second contact position, at which the movable contacts and the fixed contacts are coupled, and a third contact position, at which the movable contacts and the fixed contacts are coupled and kept pressed; an operating assembly including a handle mechanism having a handle adapted to be reversibly moved by a user or a motor operated actuator (MOE) between a first, open, position and a second, closed, position; a driving assembly operatively connected to the operating assembly and to the movable contact assembly and including a kinematic chain and at least a driving spring, the driving assembly reversibly moving the movable contact assembly following a movement of the operating assembly from the open position to the closed position, and vice-versa. In the low voltage switching device the driving assembly includes a latching mechanism which is operatively coupled to the operating assembly and to the movable contact assembly, the latching mechanism interacting with the movable contact assembly and latching it in the first contact position during a first phase of the movement of the operating assembly between the first, open, position and the second, closed position, then unlatching the movable contact assembly when the operating assembly is in an intermediate position between the first, open, position and the second, closed position, thereby allowing the quick passage of the movable contact assembly from the first contact position to the third contact position in which the movable contacts and the fixed contacts are coupled and kept pressed.

A stored energy-type circuit breaker includes a sensor that operates as a full open sensor, and that is used to prevent the circuit breaker from closing in response to either a closing signal or a manual operation. The full open sensor exhibits a first output condition when the moveable contact is in a fully open position and a second output condition when the moveable contact begins to leave the fully open position. An electronic trip unit (ETU) is electrically connected to the sensor and, when in a close break mode, blocks the circuit breaker from closing. The ETU does this by, upon detecting that the sensor is in the second output condition, generating a signal that will cause the breaker's opening spring to return the moveable contact to the fully open position.

A device for switching an electric current with separable electrical contacts includes a switching mechanism including: a switching shaft that is coupled to a mobile electrical contact; a trip hook that is pivotably mounted on a fixed support of the mechanism; a linking system coupling the switching shaft to the trip hook. The linking system includes a first pair of connecting rods that are pivotably mounted on the trip hook and a second pair of connecting rods that are mounted so as to pivot with a crank of the switching shaft. The first connecting rods are connected to the second connecting rods with a single axis of articulation which forms a pivot link between the first connecting rods and the second connecting rods.

Electrical switching device, including separable electrical contacts, a switching mechanism and a control lever. This switching mechanism is designed to move the separable contacts reversibly and selectively between a stable closed state and a stable open state. The control lever can be moved between a closing position and an opening position. The switching mechanism is configured to move the separable contacts from their closed state to their open state when the lever is moved from its closing position to its opening position, and to this end includes a spring which, between the closing position of the lever and a first intermediate position referred to as the “dead point”, exerts a force that opposes the movement of the lever and which, between the dead-point position and the opening position of the lever, exerts a force that drives the contacts towards the open position. The switching mechanism comprises a holding device which is configured to prevent the switching mechanism from moving the contacts towards their open position when the lever is moved from the closing position to the opening position and when the lever has not passed a second intermediate position located between the dead-point position and the opening position.

A device for switching an electric current with separable electrical contacts includes a switching mechanism including: a switching shaft that is coupled to a mobile electrical contact; a trip hook that is pivotably mounted on a fixed support of the mechanism; a linking system coupling the switching shaft to the trip hook. The linking system includes a first pair of connecting rods that are pivotably mounted on the trip hook and a second pair of connecting rods that are mounted so as to pivot with a crank of the switching shaft. The first connecting rods are connected to the second connecting rods with a single axis of articulation which forms a pivot link between the first connecting rods and the second connecting rods.

A movable contact conductor assembly is provided. The movable contact arm assembly includes an elongated member with a distal tip, a first end, a medial portion, an actuator coupling second component, a primary pivot second component, a secondary pivot second component, a clinch joint second component, a second end, and a proximal tip. During an over-current event the movable contact arm assembly member generates a loop force. A loop force first portion is disposed on a first longitudinal side of the movable contact arm assembly member primary pivot second component, and, a loop force second portion is disposed on a second longitudinal side of the movable contact arm assembly member primary pivot second component.

A breaker mechanism for an electrical circuit breaker is disclosed, the breaker mechanism including a spring, a latching mechanism and an actuating element, with which a breaker shaft of the electrical circuit breaker is actuated for breaking (OFF position) or making (ON position) the electric current. In an embodiment, the actuating element is actuated in the direction of the ON position when making the electric current, and the spring is thereby tensioned. Further, the latching mechanism releases the energy of the spring for actuating the breaker shaft of the electrical circuit breaker when the ON position is reached.

The present invention relates to a molded-case circuit breaker with a main contact interlock feature preventing improper operation of a tripping mechanism that trips main contacts when the main contacts fuse together. The circuit breaker includes a handle that transfers the user's operational force; a switch lever rotatably mounted on a side plate and connected to the handle, with a pressure portion formed on a part of it; a shaft link, one end of which is rotatably mounted on a shaft pin, that has a contact region on the top; a trip lever rotatably mounted on the side plate, one end of which is slidably connected to the shaft link, and the other end of which is connected to a nail of a tripping mechanism, wherein, if the pressure portion makes contact with the contact region, the trip lever rotates the nail.