Abstract: Described herein is an electronic protection device for automatic circuit-breakers comprising: a control unit; a warning interface; a supply system comprising a main supply system and a first back-up supply system; an interface for connection between said supply system and said control unit, said connection interface comprising an automatic device for passage from the main supply to the back-up supply in the event of interruption of said main supply.

Abstract: Described herein is an electronic self-supplied protection device for automatic circuit-breakers comprising: a supply device that draws energy from the stretch of electrical network protected by said circuit-breaker; a control device comprising at least two levels of operation, the first of said at least two levels of operation being associated to the function of protection from instantaneous short-circuit SCinst, the second and possible further levels of operation being associated to further functions of said protection device; a selective interface device comprising means for regulating the supply, which, in a first step, immediately following upon closing of the circuit by the circuit-breaker, supply said first level of operation, and, after a controlled period of time, supply also said second and possible further levels of operation of said control device.

Abstract: A pressure transmitter for sensing a physical variable related to a process fluid of an industrial plant, includes: a main body, which comprises a containment enclosure and a base associated with the containment enclosure; a first connection element, which comprises: a first coupling surface, at which the first connection element is associated with the base, the first coupling surface being arranged on a first arrangement surface; and at least one first process interface surface, which is arranged on a second arrangement surface; at least one second connection element, which is associated, at a second coupling surface, with the first connection element and, at a third coupling surface, with a manifold element that is suitable to convey the process fluid; its particularity encompassing the fact that the second coupling surface can be coupled to the first process interface surface, according to one or more selectable positions, so that the third coupling surface of the second connection element lies on one or m

Abstract: An electromagnetic relay with adjustable tripping threshold for a low-voltage circuit breaker, comprising a magnetic circuit that has a fixed part,, which comprises a fixed element made of ferromagnetic material, a core, and at least one winding coil, and a moving part, which has a moving plate made of ferromagnetic material and arranged so as to face at least partially the fixed element with the coil interposed between the moving plate and the fixed element, the moving plate being functionally connected to means for adjusting the tripping threshold; its particularity consisting of the fact that the moving plate and/or the fixed element have a contoured body that allows, by acting on the adjustment means, to set the tripping threshold by simultaneously varying the gap between the moving plate and the fixed element and the magnetic coupling between the moving plate and the core.

Abstract: A low-voltage circuit breaker, comprising: at least one first fixed contact, which is electrically connected to a terminal for connection to an electric circuit; a rotating moving contact, which comprises a central body from which at least one first arm protrudes, an active surface being provided at the end of the first arm, the active surface being associable/separable with respect to the fixed contact by means of a rotation of the moving contact; a rotating contact supporting shaft, which is functionally connected to an actuation mechanism of the circuit breaker and is provided with a seat that accommodates the central body of the moving contact so that the first arm protrudes externally from the seat, at least one first spring being furthermore arranged in the contact supporting shaft and being functionally coupled to the moving contact and suitable to ensure, when the circuit breaker is closed, an adequate contact pressure between the active surface and the first fixed contact; its particularity consists

Abstract: A frame member for electrical distribution cabinets, whose particularity consists of the fact that it has a substantially triangular transverse cross-section and that it has two ribs, which are arranged longitudinally along the extension of the frame member and are suitable to allow the engagement of a finishing element for finishing the frame member.

Abstract: A supply device (1) for an electronic protection device to be used in a low-voltage circuit breaker. The supply device basically comprises a primary conductor (11), a secondary winding (12), a first magnetic circuit (10), and at least one second magnetic circuit (20). The first magnetic circuit (10) is such as to surround said primary conductor (11), which is related to a phase protected by the protection device; at the same time, the first magnetic circuit (10) constitutes the core of said secondary winding (12) that is used for supply of the protection device. The second magnetic circuit (20) is structurally separated from the first magnetic circuit (10), but is operatively connected thereto for subtracting part of the first magnetic flux generated within it by the current circulating in the primary conductor (11).

Abstract: Described herein is a supporting device for busbars in a cabinet for an electrical switchboard comprising: at least one first module with a shaped body designed to be connected to a supporting element of the cab inet; the first module is made substantially of insulating material and has a first wall, designed to be set resting on the supporting element, and a second wall, along which there is defined at least one first coupling seat; and at least one second module with a shaped body made substantially of insulating material, which has a third wall, along which there is defined at least one second coupling seat, and a fourth wall, along which there is defined at least one third coupling seat. The second module is operatively coupleable to the first module alternatively with said third or said fourth wall facing said second wall so that said first seat mates geometrically with said second or said third seat, so forming a seat for housing a busbar.

Abstract: A supporting frame for a cabinet of an electrical panel has a first structural element and a second structural element with contoured bodies and which are mutually connectable. One of the structural elements includes engagement means for connecting the elements.

Abstract: A pressure sensing device for measuring the pressure of a fluid, comprising: a measurement diaphragm which is at least partially made of semiconductor material, is provided with a first surface and a second surface which are exposed respectively to a first pressure and to a second pressure, and undergoes a deformation following the application of the first pressure and of the second pressure; and a resonant element made of semiconductor material which is provided with a first end portion and with a second end portion for mechanically coupling the resonant element to the measurement diaphragm, the oscillation frequency of the resonant element varying according to the deformation to which the measurement diaphragm is subjected; and first circuit means for generating a sensing signal which is indicative of the oscillation frequency of the resonant element.

Abstract: A power supply device for an electronic protection unit for AC/DC low- and/or medium-voltage power networks, comprising: first electronic means, which are suitable to transduce electric power from an AC/DC low- and/or medium-voltage power distribution line in nominal operating conditions; and second electronic means, which are suitable to transduce energy from an AC/DC low- and/or medium-voltage power distribution line in current transient conditions.

Abstract: A connection device for low-voltage electrical equipment, such as circuit breakers, disconnectors and isolators, and corresponding accessories, having a substantially parallelepipedal structure with a first pair of faces, a second pair of faces, and a third pair of faces with the faces of each pair set opposite to one another. Each face of said first pair of faces is designed to receive electrical coupling means, whilst at least two faces of said second and third pairs of faces are equipped with mechanical coupling means for connection with said low-voltage equipment, and/or with a further connection device.

Abstract: An electronic leakage current device a low-voltage power line, comprising: a moving contact and a fixed contact which can be mutually coupled/uncoupled; first sensor means for detecting a earth leakage current and for generating an electric signal which is indicative of the value of the earth leakage current; first electronic means which are electrically connected to the first sensor means in order to generate an electric tripping signal depending on the electric signal which is indicative of the value of the earth leakage current, said first electronic means generating the electric tripping signal after a preset minimum time interval; and actuation means, operatively connected to the moving contact, in order to perform, in response to the electric tripping signal: the separation of the moving contact from the fixed contact.

Abstract: An electric pole for a low-voltage power circuit breaker, comprising an insulating enclosure (20, 30) that has a lower wall, an upper wall, two side walls, a rear wall and a front wall, at least one arc chute, at least one fixed contact (8) and at least one moving contact (9) that can be mutually coupled/uncoupled, and a first electric terminal (10) and a second electric terminal (11) that are functionally associated with the fixed contact and the moving contact and allow electrical connection of the pole in input and in output, its particularity consisting of the fact that the insulating enclosure comprises a first half-shell (20) and a second half-shell (30) which are mutually coupled along corresponding coupling surfaces and form a self-supporting structure, the first and second half-shells being shaped so as to form at least one compartment (12) that is suitable to accommodate the fixed contact and the moving contact and the arc chute, and second (13) and third containment volumes (14), which are arranged

Abstract: A duct for electrical cables comprises a plurality of filiform elements arranged substantially parallel to one another according to the longitudinal development of the duct. The duct of the invention includes, for at least a portion of its length, a plurality of structural modules, which are arranged in a transverse direction with respect to said filiform elements and are set at a distance from one another in succession according to the longitudinal development of the duct. The supporting modules have a basically U-shaped body that includes a central wall from which there project, on opposites sides with respect to one another, two side walls that are set substantially parallel to one another. On said shaped body coupling means, designed to enable connection with said filiform elements, are arranged.

Abstract: A low-voltage circuit breaker, comprising: a rotating contact supporting shaft, is provided with a seat that accommodates the central body of a moving contact so that the first arm protrudes externally from the seat, at least one first spring and one second spring being furthermore arranged in the contact supporting shaft and being suitable to ensure, when the circuit breaker is closed, an adequate contact pressure between the active surface and the fixed contact; the particularity of the circuit breaker consisting of the fact that a first pivot is fixed to the contact supporting shaft and is coupled to a hole formed in the central body, engagement means and at least one second pivot being furthermore arranged on the shaft on mutually opposite sides with respect to the first pivot, the second pivot being movable with respect to the shaft and to the moving contact, the first and second springs being furthermore anchored to the second pivot and to the engagement means and being arranged along two opposite sides

Abstract: A faceplate for an electrical switchboard, a body which has a substantially quadrangular shape and is provided with an opening to accommodate at least part of an electrical and/or electronic device of the switchboard, said faceplate being suitable to be operatively couples to a window provided on a plate, characterized in that said body has connection means for coupling to the plate, at the edges of said window, in a movable and adjustable manner with respect to the plate itself.

Abstract: A method for determining a position of a rotor of a synchronous alternating-current permanent-magnet machine includes injecting a high-frequency voltage superimposed on a voltage delivered by a machine control system; measuring a current of the motor and extracting a current corresponding to the injected voltage; and obtaining, from the injected voltage and from the corresponding current, an electrical angle &thgr; suitable to identify the position of the rotor by using a sine and cosine of twice the electrical angle &thgr; of the machine.

Abstract: An arc chamber for low-voltage circuit breakers, whose particularity consists of the fact that it comprises: multiple substantially U-shaped metallic plates; an enclosure made of insulating material which is substantially shaped like a parallelepiped and comprises two side walls, a bottom wall, a top wall and a rear wall, the side walls having, on the inside, multiple mutually opposite slots for the insertion of the metal plates, the bottom and top walls each having at least one opening and the enclosure being open at the front.

Abstract: A device for connection between a first structural element and a second structural element of a cabinet for an electrical panel, whose particularity consists of the fact that it comprises a substantially flat body for resting against an abutment surface formed by the first element, at least one pair of protruding wings being formed on the flat body and being suitable to enter corresponding slots formed in the first element and to geometrically mate in seats formed in the second element.