The invention relates to an electrical switch device comprising contacts which are mobile through actuation of a first rotation shaft (10) and a control mechanism (1) for the mobile contacts which is situated in a housing and which can be rearmed via a second rotation shaft (20). The first rotation shaft (10) passes through a first wall (2, 3) of the housing and the device comprises a first rotation sensor (12) coupled with the first rotation shaft (10) outside of the housing, so as to measure the angular displacement of the first rotation shaft. The second rotation shaft (20) passes through a second wall (2, 3) of the housing and the device comprises a rearming module (25, 26) removably fixed outside of the housing against the second wall (2, 3), so as to be coupled with the second rotation shaft (20) to be able to rearm the control mechanism.

A method is provided for determining the operating status of a spring charging motor of a LV or MV switching apparatus. The method includes acquiring a detection signal (I.sub.D) indicative of the behavior of a driving current (I.sub.MOT); processing the detection signal (I.sub.D) to calculate a steady-state detection signal (I.sub.DSS) indicative of the behavior of the driving current (I.sub.MOT) during a steady-state time interval (T.sub.SS); processing the steady-state detection signal (I.sub.DSS) to calculate data (DS) indicative of HF and LF spectral components of the driving current (I.sub.MOT); processing the data (DS) to calculate first and second harmonic distortion values (THD.sub.LF, THD.sub.HF); processing the first and second harmonic distortion values to calculate first and second output data (O.sub.1, O.sub.2), which are indicative of the variations of the first and second harmonic distortion values with respect to corresponding first and second reference values, respectively.

A method is provided for determining the operating status of a spring charging motor of a LV or MV switching apparatus. The method includes acquiring a detection signal (I.sub.D) indicative of the behavior of a driving current (I.sub.MOT); processing the detection signal (I.sub.D) to calculate a steady-state detection signal (I.sub.DSS) indicative of the behavior of the driving current (I.sub.MOT) during a steady-state time interval (T.sub.SS); processing the steady-state detection signal (I.sub.DSS) to calculate data (DS) indicative of HF and LF spectral components of the driving current (I.sub.MOT); processing the data (DS) to calculate first and second harmonic distortion values (THD.sub.LF, THD.sub.HF); processing the first and second harmonic distortion values to calculate first and second output data (O.sub.1, O.sub.2), which are indicative of the variations of the first and second harmonic distortion values with respect to corresponding first and second reference values, respectively.

A circuit breaker can include a moveable electrical contact configured to be moved between an open position and a closed position, and a lever assembly configured to prevent the progressive closing of the moveable electrical contact to the closed position such that the lever assembly is configured to cause snap action closing of the moveable electrical contact at a charged position of a motorized slider.

This invention relates to a switching device (10). More specifically, the invention relates to a retrofit switching device (10) for mechanically switching a plurality of switches between on and/or off conditions. It is envisaged that the primary application of such invention is for switching circuit breakers configured along one or more rows on a distribution board. The switching device (10) includes a pair of primary parallel guide rails (12,14), a means for anchoring the switching device (10) to a switch covering panel (i.e. a distribution board panel) and a carriage (22), supported across the primary parallel guide rails (12,14) and movable back-and- forth therealong along a first axis, the carriage (22) comprising thereon: (i) a switch engaging formation for operably switching the switches between on and off conditions; and (ii) a primary drive (26) for moving the switch engaging formation back-and-forth along a second axis, wherein the first and second axes are transverse one another. The switching device (10) further includes a secondary drive (28) for moving the carriage along the primary parallel guide rails (12, 14) and operably along the one or more rows of switches, a controller for at least actuating the primary (26) and the secondary drives (28), and a power source for powering at least the primary drive (26), the secondary drive (28) and the controller.

Some embodiments relate to an electric switching device, which comprises a switching contact, an actuation mechanism coupled to the switching contact and a motor coupled to the actuation mechanism. The actuation mechanism comprises a first spring, a first actuation plate coupled with the switching contact and a second actuation plate coupled with the motor. The actuation mechanism also comprises a first blocking element, which blocks the first actuation plate in a rotational blocking position and releases the first actuation plate in a rotational release position. The first spring is loaded by a movement of the motor. At some point in time, the second actuation plate or an actuating element connected thereto turns the first blocking element and thus releases the first actuation plate. As a consequence, the first actuation plate starts to move and finally actuates the switching contact.

Some embodiments relate to an electric switching device, which comprises a switching contact, an actuation mechanism coupled to the switching contact and a motor coupled to the actuation mechanism. The actuation mechanism comprises a first spring, a first actuation plate coupled with the switching contact and a second actuation plate coupled with the motor. The actuation mechanism also comprises a first blocking element, which blocks the first actuation plate in a rotational blocking position and releases the first actuation plate in a rotational release position. The first spring is loaded by a movement of the motor. At some point in time, the second actuation plate or an actuating element connected thereto turns the first blocking element and thus releases the first actuation plate. As a consequence, the first actuation plate starts to move and finally actuates the switching contact.

A controllable main breaker includes a main breaker sized to fit within an existing panel slot of an electrical panel. The main breaker comprises a trigger to open the main breaker in response to a thermal fault or overcurrent event. The controllable main breaker further includes an auxiliary shell sized to fit within at least one adjacent breaker slot. The auxiliary shell includes a controllable actuator that mechanically opens the main breaker.

A linkage turbine for an automatic opening/closing driving mechanism, wherein the linkage turbine is integrally and concentrically provided with a turbine driven portion, a gear driving portion and a cam linkage portion successively in the direction of the rotation central axis thereof; turbine teeth fitted with a driving turbine are provided on the whole peripheral wall of the turbine driven portion; a reset groove, a recess, a transition portion and a boss are successively provided on the periphery of the cam linkage portion; and a plurality of driving teeth are provided on part of the peripheral wall of the gear driving portion.

A circuit breaker can include a moveable electrical contact configured to be moved between an open position and a closed position, and a lever assembly configured to prevent the progressive closing of the moveable electrical contact to the closed position such that the lever assembly is configured to cause snap action closing of the moveable electrical contact at a charged position of a motorized slider.