Abstract:
A circuit breaker protects an electric low-voltage circuit, and has the function of ascertaining a level of the current of the low-voltage circuit. A mechanical separating contact unit is operated using a mechanical handle such that an opening function of contacts is switched to prevent a current flow or a closing function of the contacts is switched for a current flow in the low-voltage circuit. An electronic interruption unit is connected to the mechanical separating contact unit in series on the circuit side and which, as a result of semiconductor-based switch elements, has a high-ohmic state of the switch elements to prevent a current flow and a low-ohmic state of the switch elements for a current flow in the low-voltage circuit. The ascertained current level is compared with current thresholds and if the current thresholds are exceeded, a process for preventing the current flow in the low-voltage circuit is initiated.
Abstract:
A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.
Abstract:
The present disclosure relates to a supplementary isolating device for remote operation of a circuit breaker with interlocking functionality. The supplementary isolating device includes: an electrical disconnection switch manoeuvrable between a mechanically lockable first position and a mechanically lockable second position, which electrical disconnection switch is configured to be connected in the control circuit of a circuit breaker for an electrical drive system, wherein the supplementary isolating device is configured to send a first control voltage to the circuit breaker to provide an electrical disconnect and interlocking the operation of the circuit breaker, when the electrical disconnection switch is in the first position, an electric terminal configured to be connected to an auxiliary contact of the circuit breaker to obtain an operational status of the circuit breaker, and an indicator configured to indicate the operational status of the circuit breaker.
Abstract:
A undervoltage release circuit comprising a solenoid and a spring, the solenoid acting against the spring and being connected to a trip-latch which trips a circuit-breaker as soon as a control voltage drops under a voltage level, characterized in that it comprises a voltage determining device and a switching element controlled by a command signal, the switching element being connected in series with the solenoid, the voltage determining device comprising means for measuring the control-voltage and means for generating a signal according to the control voltage measured, the signal according to the control voltage measured constituting the command signal so that the switching element is closed when the control voltage measured is equal or higher than the voltage level and opened as soon as the control voltage is less than the voltage level.
Abstract:
A voltage and/or current sensing device for low-, medium- or high voltage switching devices is disclosed as a constructively enhanced measuring device with high performance for use in switching devices. The sensing device can include a first voltage sensing part, a second voltage sensing part and a current sensing part all arranged in a same common single housing separated, from the switching device, in a way that an output wire from the first voltage sensing part, for sensing voltage at an upper terminal of the switching device, is located close to the current sensing part, the output wire being applied with an insulating cover, and mechanically fixed to the current sensor part, and/or the output wire being implemented in an isolation body, and only located near to the current sensing part.
Abstract:
A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.
Abstract:
A device for interrupting the flow of electrical power in an electrical distribution system is provided. The device includes a sensor operably coupled to the electrical distribution system. A switching mechanism is coupled to the electrical distribution system, the switching mechanism movable between an open position and a closed position. A controller operably coupled to the sensor and the switching mechanism, the controller having a processor that is responsive to executable computer instructions when executed on the processor incrementing a first counter in a first mode of operation and a second counter in a second mode of operation. Wherein the processor is further responsive to executable computer instructions for switching from the first mode to the second mode in response to a signal from the sensor.
Abstract:
A rotation activated circuit breaker with a leading auxiliary switch, in which the auxiliary contacts of the auxiliary switch are actuated before the main contacts. An actuator element is provided, which contains a drive pinion that is rotation actuated by an actuating mechanism and a longitudinally movable first gear rack, which engages with the drive pinion and actuates the auxiliary switch. Furthermore, a second gear rack, which lags behind the first gear rack in the closing direction, and an output pinion, assigned to the second gear rack, which is connected to a drive shaft for the breaking mechanism of the circuit breaker, are provided. The tooth pitch of the output pinion and the second gear rack is greater than the tooth pitch of the drive pinion and the first gear rack so that the total rotation angle of the drive pinion and output pinion is the same over the full closing motion of the actuating mechanism.
Abstract:
An electric switch (1) includes a switching device (4), movable between its ON position and OFF position, for switching a current circuit. The switch (1) is combined with a magnetic circuit (28, 29) for electromagnetic undervoltage tripping. In the event of undervoltage, the magnetic circuit (28, 29), as it opens, shifts the switching device (4) to its OFF position. The switching device (4) shifted to its OFF position closes the magnetic circuit (28, 29) again. A linearly movable fixing slide (24) couples the switching device (4) with the magnet armature (28) of the magnetic circuit and fixes the magnet armature (28) on the magnet core (29) in the OFF position of the switching device (4).
Abstract:
An electrical switch having a transmission linkage which is actuated by a rocker and which is coupled to a slide bearing contacts and which contains a triggering lever cooperating with a latching piece. The technical problem is to provide a switch with a strong latching force and reliable unlatching. The transmission linkage is constructed as a toggle lever, to the toggle joint (13) of which the rocker (14) is coupled and the first lever (12) of which is coupled in a bearing which is fixed to the housing and the second lever (11) of which is constructed as a latching lever for a pivot lever (10), which latching lever is active in a position of the toggle lever above the dead center. The pivot lever (10) engages into the slide (6). A yoke lever (15) is constructed as a triggering lever for the second lever (11) of the toggle lever and as a counterbearing for a pressure spring (26). The latching piece latches the yoke lever mechanically or electromagnetically, and the pressure spring (26) on the one hand pre-tensions in the switched-off position the slide (6) and the pivot lever (10) coupled thereto and on the other hand supplies the tensioning force for the yoke lever (15) to trigger the switch.