A switchgear includes a circuit breaking section having a moveable contact bridging element and at least one first arc chutes adjacent the contact bridging element, each arc chute including a base plate for connecting to the contact bridging element and a group of splitter plates placed adjacent the base plate, where the splitter plates of the groups are separated from the base plate and each other via air gaps and resistors interconnect at least some of the plates in at least a first of the arc chutes for bypassing corresponding air gaps, wherein the resistors have values in the range 5 k-1 M, current ratings below 100 mA and power ratings below 1 W.

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.

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.

An on-load tap changing apparatus includes a first switching unit connected to a first tap of a transformer provided in a power system and switching power supplied from the first tap, a first impedance changing unit connected in series with the first switching unit and increasing an impedance when the first switching unit executes a switching operation, a second switching unit connected to a second tap of the transformer and switching power supplied from the second tap, and a second impedance changing unit connected in series with the second switching unit and increasing an impedance when the second switching unit executes a switching operation. The on-load tap changing apparatus can suppress an arc at the time of switching, reduce deterioration of a switching unit, and have excellent durability.

A switchgear includes a circuit breaking section having a moveable contact bridging element and at least one first arc chutes adjacent the contact bridging element, each arc chute including a base plate for connecting to the contact bridging element and a group of splitter plates placed adjacent the base plate, where the splitter plates of the groups are separated from the base plate and each other via air gaps and resistors interconnect at least some of the plates in at least a first of the arc chutes for bypassing corresponding air gaps, wherein the resistors have values in the range 5 k-1 M, current ratings below 100 mA and power ratings below 1 W.

Disconnecting device for a power line, having at least one disconnecting means which is spatially arranged between a first and a second connector when the disconnecting device is in a closed state, the disconnecting means having at least one connecting element forming an electrical connection between the connectors when the disconnecting device is in the closed state, wherein the connecting element is electrically connected to the first connector via a first contact point and to the second connector via a second contact point when the disconnecting device is in the closed state, and wherein the disconnecting means is arranged in such a way that a breakdown voltage between the first and the second connector when the disconnecting device is in an open state is greater than between the first connector and the first contact point of the connecting element and/or between the second connector and the second contact point of the connecting element.

A circuit breaker system is disclosed in the present application. The circuit breaker system includes a housing to hold an electrical interrupter within an internal region separated from an external ambient region. The electrical interrupter includes at least a first pair of electrical contact elements that are movable between open and closed positions. A voltage limiter, such as a metal oxide varistor (MOV), is connected across the pair of electrical contact elements to receive and dissipate a transient voltage when the first pair of electrical contacts is moved from a closed position to an open position, thereby reducing undesired arcing and premature wear or erosion of certain electrical components.

Disconnecting device for a power line, having at least one disconnecting means which is spatially arranged between a first and a second connector when the disconnecting device is in a closed state, the disconnecting means having at least one connecting element forming an electrical connection between the connectors when the disconnecting device is in the closed state, wherein the connecting element is electrically connected to the first connector via a first contact point and to the second connector via a second contact point when the disconnecting device is in the closed state, and wherein the disconnecting means is arranged in such a way that a breakdown voltage between the first and the second connector when the disconnecting device is in an open state is greater than between the first connector and the first contact point of the connecting element and/or between the second connector and the second contact point of the connecting element.

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.

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.