Abstract: A system for short-circuiting or grounding low-voltage and/or medium-voltage installations. The system includes at least one fault detection unit for detecting an arc and at least one signal-processing unit for processing signals from the at least one fault detection unit. The signal-processing unit is or can be connected to the fault detection unit for signal transmission. The system further includes at least one control unit which is or can be connected to the signal-processing unit for signal transmission, an electrical energy storage device in or on the control unit, and at least one fast-switching switching element having a mechanical energy store.

Abstract: A system for short-circuiting or grounding low-voltage and/or medium-voltage installations. The system includes at least one fault detection unit for detecting an arc and at least one signal-processing unit for processing signals from the at least one fault detection unit. The signal-processing unit is or can be connected to the fault detection unit for signal transmission. The system further includes at least one control unit which is or can be connected to the signal-processing unit for signal transmission, an electrical energy storage device in or on the control unit, and at least one fast-switching switching element having a mechanical energy store.

Abstract: A vacuum switching device for medium or high voltages contains two contacts. At least one contact of which is mechanically movably mounted by a drive rod and thus is in electrical contact with the drive rod. The vacuum switching device has a vacuum chamber in which the contacts are arranged. The vacuum switching device has a spring contact, which is outside the vacuum chamber, and the drive rod, when the contacts are closed, is in electrical contact with a power line via the spring contact, and in that the spring contact, when the contacts are open, is electrically insulated from the drive rod.

Abstract: A switching device in a vacuum switching tube or for arc quenching in gases. The switching device has an arc-quenching device. There is also described a method for operating a switching device in a vacuum switching tube or in arc quenching in gases, which switching device has an arc-quenching device for medium-voltage, low-voltage and/or high-voltage applications.

Abstract: A method for operating an electrical switching device and an electrical switching device are disclosed. In order to ensure reliable operation of an electrical switching device having parallel switching paths allocated to a phase, which have lower switching capacity in comparison to conventional parallel switching paths, the zero current crossings in the phase are detected and at least one switching mechanism, operatively connected to the switching paths, is actuated so that all parallel switching paths allocated to the phase open within a window of time which is in the phase relative to the zero current crossings.

Abstract: A switch, in particular a grounding switch, is for quickly establishing a ground connection and for extinguishing an arc fault for a switching system. The grounding switch includes at least one fixed contact having a first cable feed, a moving contact, a contact guide having a second cable feed, and a mechanical energy store. In the opened state, an insulating distance between the fixed contact and the moving contact, is filled with insulation liquid, at least in part. The switch further includes a triggering device and a locking mechanism.

Abstract: A switching device in a vacuum switching tube or for arc quenching in gases. The switching device has an arc-quenching device. There is also described a method for operating a switching device in a vacuum switching tube or in arc quenching in gases, which switching device has an arc-quenching device for medium-voltage, low-voltage and/or high-voltage applications.

Abstract: A device is disclosed for transmission of forces on a moving contact connecting bolt of a contact system including a switching unit with a moving contact and a further contact. The device includes an at least partially flexible conductor element for electrical connection of the moving contact connecting bolt to a connection of the switching unit and at least one first branch and a second branch. The branches are arranged for reciprocal current flow to generate an electromagnetic force. The invention the second branch is guided along and retained on a support plate firmly connected to the moving contact connecting bolt such that an electromagnetic force occurring in a short-circuit is introduceable between the first branch and the second branch for increasing a contact pressure exerted by a contact pressure spring in the moving contact connecting bolt, the support plate being slidably movable in the housing of the switching unit.

Abstract: A switch, in particular a grounding switch, is for quickly establishing a ground connection and for extinguishing an arc fault for a switching system. The grounding switch includes at least one fixed contact having a first cable feed, a moving contact, a contact guide having a second cable feed, and a mechanical energy store. In the opened state, an insulating distance between the fixed contact and the moving contact, is filled with insulation liquid, at least in part. The switch further includes a triggering device and a locking mechanism.

Abstract: A method for operating an electrical switching device and an electrical switching device are disclosed. In order to ensure reliable operation of an electrical switching device having parallel switching paths allocated to a phase, which have lower switching capacity in comparison to conventional parallel switching paths, the zero current crossings in the phase are detected and at least one switching mechanism, operatively connected to the switching paths, is actuated so that all parallel switching paths allocated to the phase open within a window of time which is in the phase relative to the zero current crossings.

Abstract: A drive, for a switching device including a contact system with a fixed and a moving contact, including an actuator for operating the moving contact for closing or opening the contact system, and also a mechanical transmission device arranged between the moving contact and the actuator. The transmission device includes a toggle joint mechanism formed by a folding lever, pivotable about a stationary bearing, and a coupling element, connected to the folding lever via a moving bearing. The toggle joint mechanism is pivotable between a first end position and a second end position. When the changeover is made from the first to the second end position or vice versa, a maximum extended position occurs. The coupling element holds the moving contact in that position which closes the contact system in the first end position and in that position in which the contact system is open in the second end position.

Abstract: A switching device includes a contact system having a movable contact to be moved along a movement direction, a stationary contact and an improved arc quenching device with a configuration for generating a magnetic field formed in a plane perpendicular to the movement direction and an electrode configuration having a first electrode conductively connected to the movable contact and a second electrode conductively connected to the stationary contact. The first electrode and the second electrode are disposed in such a way that an electric field can be generated between the first electrode and the second electrode perpendicularly to the direction of movement and perpendicularly to the magnetic field.

Abstract: A device is disclosed for transmission of forces on a moving contact connecting bolt of a contact system including a switching unit with a moving contact and a further contact. The device includes an at least partially flexible conductor element for electrical connection of the moving contact connecting bolt to a connection of the switching unit and at least one first branch and a second branch. The branches are arranged for reciprocal current flow to generate an electromagnetic force. The invention the second branch is guided along and retained on a support plate firmly connected to the moving contact connecting bolt such that an electromagnetic force occurring in a short-circuit is introduceable between the first branch and the second branch for increasing a contact pressure exerted by a contact pressure spring in the moving contact connecting bolt, the support plate being slidably movable in the housing of the switching unit.

Abstract: A drive, for a switching device including a contact system with a fixed and a moving contact, including an actuator for operating the moving contact for closing or opening the contact system, and also a mechanical transmission device arranged between the moving contact and the actuator. The transmission device includes a toggle joint mechanism formed by a folding lever, pivotable about a stationary bearing, and a coupling element, connected to the folding lever via a moving bearing. The toggle joint mechanism is pivotable between a first end position and a second end position. When the changeover is made from the first to the second end position or vice versa, a maximum extended position occurs. The coupling element holds the moving contact in that position which closes the contact system in the first end position and in that position in which the contact system is open in the second end position.

Abstract: A switching device includes a contact system having a movable contact to be moved along a movement direction, a stationary contact and an improved arc quenching device with a configuration for generating a magnetic field formed in a plane perpendicular to the movement direction and an electrode configuration having a first electrode conductively connected to the movable contact and a second electrode conductively connected to the stationary contact. The first electrode and the second electrode are disposed in such a way that an electric field can be generated between the first electrode and the second electrode perpendicularly to the direction of movement and perpendicularly to the magnetic field.

Abstract: A drive for a switching device having a contact system with a fixed contact and a moving contact, includes a force initiation element for initiating a drive force, an actuator for actuating the moving contact to close or open the contact system and a transmission disposed between the force initiation element and the actuator. The transmission allows both transferring the contact system from the closed to the open state and transferring the contact system from the open to the closed state to be triggered by a drive force in the same direction, making the drive cost-effective and compact.

Abstract: A drive for a switching device having a contact system with a fixed contact and a moving contact, includes a force initiation element for initiating a drive force, an actuator for actuating the moving contact to close or open the contact system and a transmission disposed between the force initiation element and the actuator. The transmission allows both transferring the contact system from the closed to the open state and transferring the contact system from the open to the closed state to be triggered by a drive force in the same direction, making the drive cost-effective and compact.

Abstract: In order to form a tensioning apparatus for a switch-on energy store of a circuit breaker, in which apparatus a tensioning shaft, which can rotate by means of a drive wheel, for tensioning the switch-on energy store is fixedly connected in each case to a cam and to a cam disc, which apparatus has a tripping stop, in which apparatus the drive wheel is coupled to the tensioning shaft via a clutch, and which apparatus has a simple and at the same time cost-effective design, the invention proposes that the clutch is a ratchet arrangement.

Abstract: In order to form a switch-on energy storage apparatus for a circuit breaker, wherein a switch-on energy storage device is held at a first end and is connected to a cam of a tensioning apparatus at a second end, with which tensioning apparatus means interact which limit a return movement. The switch-on energy storage apparatus has a simple and cost-effective design. The means have a ratchet mechanism arranged at the first end of the switch-on energy storage device.

Abstract: A locking mechanism in a switch in the field of electrical power distribution prevents an energy storage device from being discharged. The mechanism has a pushbutton which, when the locking mechanism is in an unlocked position, is coupled by way of a force transmission element via an interlocking connection to a discharge initiator for discharging of the energy storage device, such that a switching-on movement acting on the pushbutton is introduced via the force transmission element into the discharge initiator in order to relieve the load on a force storage device, with the force transmission element being connected to interlock interruption means for moving the locking mechanism to a locked position in which the interlock is cancelled.