Abstract: An interrupter unit for a circuit breaker includes a gas-insulated housing, which is fillable with a quenching gas, and a gas-guiding structure, which is disposed in the housing and has a guide tube and at least one diverting element. The guide tube extends in tubular manner about a longitudinal axis of the interrupter unit in order to guide hot gas, which is created in an electric arc region of the interrupter unit by the heating of quenching gas by an electric arc, away from the electric arc region. The at least one diverting element is configured to set hot gas exiting from the guide tube in a circular flow running around the longitudinal axis.

Abstract: The present invention relates to a device for interrupting non-short circuit currents only, and in particular relates to a disconnector, more particularly high voltage disconnector, or to an earthing switch, more particularly make-proof earthing switch, and further relates to a low voltage circuit breaker. The device comprises at least two contacts movable in relation to each other between a closed state and an open state and defining an arcing region, in which an arc is generated during a current interrupting operation and in which an arc-quenching medium comprising an organofluorine compound is present. According to the application, a counter-arcing component is allocated to the arcing region, the counter-arcing component being designed for counteracting the generation of an arc and/or being designed for supporting the extinction of an arc.

Abstract: Embodiments of the disclosure include systems and methods for providing an electric high-voltage circuit breaker. In one embodiment, a circuit breaker includes a primary chamber; and a compression chamber, wherein the circuit breaker further includes a valve configured to control a fluid flow between the primary chamber and the compression chamber, wherein the valve includes a valve body, a first valve plate that is arranged axially movable with respect to the valve body, and a second valve plate that is arranged between and movable with respect to the valve body and the first valve plate, wherein said first valve plate includes at least one opening enabling the fluid flow through the first valve plate, wherein a first surface of the valve body forms a valve seat for the first valve plate, and wherein a first surface of the first valve plate forms a valve seat for the second valve plate.

Abstract: A load-break switch has a housing holding insulation gas at ambient pressure; a first main contact and a second main contact being movable relative to each other in an axial direction of the switch; a first arcing contact and a second arcing contact being movable relative to each other in the axial direction and defining an arcing region where an arc is formed during a current breaking operation, wherein the arcing region is located radially inward from the first main contact; a pressurizing system pressurizing a quenching gas during the current breaking operation; and a nozzle system arranged to blow the pressurized quenching gas onto the arc. The first main contact includes at least one pressure release opening to allow gas flow in a radial outward direction. A total area of the pressure release opening suppresses a reduction of gas flow out of the pressure release opening.

Abstract: Embodiments of the disclosure relate to an electric switching unit provided with an arc-blasting unit. In one embodiment, an electric switch can be provided. This electric switch can include an arc-blasting unit with a compression cylinder enclosing a compression chamber mobile together with the mobile contacts, and a stationary piston at an end of the compression chamber, provided with a support rod made up as a blowpipe which channels the gas compressed in the chamber when the contacts separate to a nozzle that directs the flow to a separation place of the contacts so as to efficiently blast electric arcs. The arrangement can be relatively lightweight and can occupy relatively little space.

Abstract: An interrupter unit for a circuit breaker has two electrically conductive arcing contact pieces, which can be moved relative to one another along a switching path. An insulating nozzle has a nozzle channel through which the switching path runs. A heating volume is connected to the nozzle channel. A separating housing divides the heating volume into a cold gas region and a hot gas region. A cold gas duct runs through a nozzle channel end section of the nozzle channel and is connected to the cold gas region. A hot gas duct runs through the nozzle channel end section and is connected to the hot gas region.

Abstract: A gas circuit breaker that includes: a first tank filled with an insulating gas; a fixed contact provided inside the first tank; a movable contact provided inside the first tank; a nozzle that ejects the insulating gas toward the fixed contact when the movable contact moves in a first direction; a cylindrical body that guides the gas ejected from the nozzle in a second direction; and a second tank connected to the first tank in the second direction. The movable contact is movable between a position in contact with the fixed contact and a position separated from the fixed contact. The first direction is a direction in which the movable contact moves from the position in contact with the fixed contact to the position separated from the fixed contact. The second direction is a direction opposite to the first direction.

Abstract: An electrical switch includes a gas-insulated tube, a contact system in the tube having fixed and movable contacts, a contact operating element passed out of the tube and movable along an actuation direction for opening and closing the system, and a contact pressure spring movable along the direction, connected to the operating element and an external drive element and disposed in a stationary guide part. The guide part guides the operating element. If the drive element shifts along the direction toward the fixed contact, the spring, operating element and movable contact move toward the fixed contact, closing the system and compressing the spring providing contact pressure force. The spring is in a housing connected to the operating element and movable relative to the guide part. A guide element is attached outside the housing, bears against the guide part, guides the housing and guides the operating element along the direction.

Abstract: An outer peripheral wall surrounds a heating chamber that communicates with an arc chamber through an opening that separates fixed contacts from each other in a circumferential direction. The outer peripheral wall includes a heat-resistive cylindrical heat-flow receiving wall portion that is arranged at a position opposed to the opening in a radial direction, and a cylindrical wall portion that is connected to the heat-flow receiving wall portion in a direction of a center axis and also connected to a fixed-side energizing member at its one end on the opposite side to where the wall portion is connected to the heat-flow receiving wall portion, and is made of an insulating material. With this configuration, the outer peripheral wall surrounding the heating chamber can be protected from damage and heat deterioration due to the influence of hot gas.

Abstract: An arc extinguishing device of a gas circuit breaker includes: an arc chamber in which an arc generated between a movable electrode and a fixed electrode is formed; a heat puffer chamber disposed so as to surround the arc chamber; a blow port in which the arc chamber communicates with the heat puffer chamber in the circumferential direction of the arc chamber; hydrogen absorbents which are disposed on an inner wall of a pressure chamber; an exhaust port which passes to the outside of an arc extinguishing chamber; and a hydrogen absorbent disposed at a position surrounding the movable electrode. Deterioration of insulation due to a product formed by decomposition of arc extinguishing gas by the arc during a contact opening operation can be suppressed.

Abstract: Current path structure provides a current path between an interrupter assembly and a resistor assembly of a dead tank circuit breaker and includes an electrically conductive fixed support having first and second ends. The first end is fixed to one of the interrupter assembly or the resistor assembly. A substantially hollow, electrically conductive conductor has first and second ends, with a connector at the first end thereof. The connector is removably connected to the other of the interrupter assembly or the resistor assembly. Coupling structure removably couples the conductor with the fixed support such that when coupled, the current path structure is in an operative position electrically connecting the interrupter assembly with the resistor assembly, and when decoupled, the fixed support can be moved into telescoping relation within the conductor defining a collapsed position of the current path structure.

Abstract: A gas circuit breaker is provided, avoiding change in the position of a cover member and without weakening of the blow of gas to the arc in an arc discharge cavity even when a surface of the cover member in contact with the arc discharge cavity is damaged. The gas circuit breaker includes a contact ring, a holder attached to the contact ring, and extending to a path of arc-extinguishing gas that extinguishes an arc, and an electrically insulative cover member attached to the holder.

Abstract: A high voltage gas circuit breaker, comprises: a fixed unit including a fixed arc contactor and a fixed contactor; and a movable unit including a movable arc contactor and a movable contactor, and configured to selectively contact or be separated from the fixed unit, and wherein the movable unit comprises: a fixed cylinder; a compression cylinder slidably-installed in the fixed cylinder; a movable rod penetratingly-coupled to the compression cylinder, and configured to transmit an adjusting force of an operator; a pressing member installed on an inner bottom part of the compression cylinder; and a compression plate supported by the pressing member, and up-down moving in the compression cylinder by a pressure of an expansion chamber.

Abstract: A circuit breaker is disclosed. The circuit breaker includes a first current path section and a second current path section. At least one of the first and second current path section includes a first current path section member and at least one second current path section member. The at least one second current path section member is arranged in spaced relation to a surface of the first current path section member. The at least one second current path section member is electrically coupled with the first current path section member via at least a first coupling surface portion of the surface of the first current path section member.

Abstract: A gas insulated switchgear includes: an upper conductor; a lower conductor; a movable contact provided in the upper conductor; a fixed contact fixedly provided in the lower conductor; a moving side tulip contact provided in the movable contact; a moving side shield fixed to the upper conductor; a fixed side tulip contact provided in the fixed contact; a fixed side shield fixed to the lower conductor; and an insulating screen unit installed to selectively block the opening end of the moving side shield and covering an end of the movable contact when the movable contact is separated from the fixed contact.

Abstract: Described is a high-voltage circuit breaker provided with two opposite-arranged arcing contacts, which are surrounded by an insulating nozzle. Furthermore provided are two main contacts, arranged opposite each other outside of the insulating nozzle, with respectively one of these contacts being assigned to one of the two arcing contacts. The high-voltage circuit breaker is provided, in at least one embodiment, with at least one device for diverting an insulating gas flow from the region between the two arcing contacts, wherein a respective insulating gas flow is conducted outside of the insulating nozzle and in the direction toward the main contacts.

Abstract: According to an embodiment, a gas insulation apparatus (e.g., a gas circuit breaker) includes a high-voltage unit, a zeolite and an insulation gas in a closed vessel. The insulation gas is CO2 gas or a gas including CO2 gas as the main component. The zeolite is contained in a zeolite case and is placed under an insulation gas atmosphere. CO2 is adsorbed on the zeolite before use of the gas insulation apparatus.

Abstract: A switchgear assembly has a contact gap and an insulating material nozzle. The insulating material nozzle at least partly encloses the contact gap. A nozzle channel for the insulating material nozzle opens with a outlet opening in a hot gas space. A deflector element is disposed within the hot gas space which defines a deflector channel. The deflector channel has a segment which has an expanding cross-section in the stream direction of a switching gas in the hot gas space.

Abstract: A switching device assembly with a contact gap has a nozzle made of insulating material. The nozzle made of insulating material is formed with a nozzle channel that ends in a hot gas space. A deflector element is arranged within the hot gas space. The deflector element is supported inside the deflector channel.

Abstract: A gas-blast circuit breaker is disclosed which includes a first contact and a second contact which can move relative to one another along a longitudinal axis. A blowout volume is arranged around the first contact. The blowout volume can be connected via a gas channel to an arc zone, in order to blow out an arc which is struck when the first contact is disconnected from the second contact. The blowout volume can be bounded radially on an outside by a separating element which separates the blowout volume from a low-pressure area. A flow opening, which allows a gas exchange, can lead in a radial direction from the low-pressure area into the blowout volume.

Abstract: A method of evacuating hot gases produced in a current breaking operation by a high voltage circuit breaker (1) which comprises a metal outer tank (2) filled with insulating gas, a casing (3) having gas outlet ports (30) and arranged inside the metal outer tank (2), with which it is in communication via the said ports, characterized in that insulating gas (GI) is aspirated from inside the casing (3) in a direction parallel to the flow of the hot gases (GC) produced by the current breaking operation, so as to mix the gases inside the casing (3) before they are evacuated, through the said gas outlet ports (30) of the casing, into the interior of the metal outer tank (2). The invention also relates to an associated high voltage circuit breaker, which includes means (5) for aspirating insulating gas from the interior of the casing (3), in a direction parallel to the hot gas stream.

Abstract: The invention relates to an interrupter arrangement (1) having a switching tube (3) comprising a switch gas outlet opening (5). The switching tube (3) is connected to a coupling section (9) of a drive rod (10) in the region of the switch gas outlet opening (5). The coupling section (9) is protected from switch gasses emitted from the switch gas outlet opening (5) by means of a shield (15).

Abstract: An electrical breaker device, in particular a high-voltage circuit breaker, and a method for improved quenching gas cooling are disclosed. Cold gas is stored intermediately in the exhaust region, and a first partial gas flow is guided to bypass the intermediately stored cold gas and to flow off into the breaker chamber, the intermediately stored cold gas being forcibly displaced out of the exhaust region with the aid of a second partial gas flow and being mixed with the first partial gas flow before flowing off into the breaker chamber housing. Exemplary embodiments relate, inter alia, to the design of the intermediate storage volume for the cold gas and to auxiliary means for precooling the hot quenching gas. Advantages are, inter alia, improved quenching gas cooling, an increased circuit breaker rating and/or a more compact breaker design.

Abstract: Disclosed is a gas insulation circuit breaker with a structure for decreasing friction. The gas insulation circuit breaker comprises: a movable side supporting plate; a cylinder mounted so as to perform a reciprocating movement in a state that an outer surface thereof comes in contact with an inner surface of the movable side supporting plate; a contact spring for conduction disposed between the movable side supporting plate and the cylinder; and a movable arc contactor and a fixed arc contactor installed at the movable side supporting plate and the cylinder, respectively, and contacting and separated from each other by movement of the cylinder, wherein an end of the cylinder is tapered, and the outer surface of the cylinder comes in contact with the contact spring for conduction after a predetermined time lapses in a state that the cylinder has started to perform a closing operation during a circuit breaking operation.

Abstract: A high-voltage circuit breaker includes two arcing contacts, which are capable of moving relative to one another along an axis, an insulating nozzle, a heating volume for accommodating quenching gas, a heating channel, and an overpressure valve. The pressure of the quenching gas is based on the energy of a switching arc, which is formed when the breaker opens and generates arcing gas, and the heating channel opens out, with axial alignment, into the heating volume. The heating channel connects an arc zone, and the overpressure valve limits the pressure of the quenching gas by opening a relief duct, which opens out into an expansion space. In high-current switching, the pressure of the arcing gases in the arc zone is limited, and the quality of the quenching gas stored in the heating volume is improved, due to the relief duct having an outflow section extending in the radial direction.

Abstract: A heavy-duty circuit breaker has a housing with a longitudinal housing axis and a contact arrangement disposed in the housing. The contact arrangement is conductively connected to a first electrical lead fed through the housing and a second electrical lead fed through the housing. The housing comprises a first housing part and a second housing part. The first electrical lead is fed through the first housing part, and the second electrical lead through the second housing part. The two housing parts are connected together so as to be rotatable in opposite directions about the longitudinal housing axis.

Abstract: The gas exhaust comprises a generally cylindrical shaped casing closed by a bottom at one end and with openings to allow gas to escape. A duct is arranged in the casing to delimit a central passage inside the duct, and an annular passage surrounding the central passage outside the duct between it and the casing. There is a communication consisting of four holes in the duct close to the bottom to form a communication between the central passage inside the duct and the annular passage. The casing includes two diametrically opposite openings located in a horizontal plane.

Abstract: A gas-circuit breaker includes a cylinder, a stationary piston, and a moving piston. The cylinder has a moving contact that is fixed on one end of a rod and has a gas exhaust that faces a stationary contact. The rod is inserted into the cylinder. The stationary piston is fixed to the container, and is fitted in an opening of the cylinder to create a puffer chamber. Due to movement of the rod, the stationary piston compresses arc-extinguishing gas, and the gas blows onto the arc through gas exhaust. The moving piston partitions the puffer chamber into a first puffer chamber and a second puffer chamber. Sliding of the moving piston changes the capacity of the first puffer chamber and the second puffer chamber according to the difference in pressure in the first puffer chamber and the second puffer chamber.

Abstract: This invention relates to a circuit breaker (1) for high or medium voltages, of the type having a drive bar (70) coupled to a drive member, and a circuit-breaking chamber (2) facing it and having two contacts (3, 4), each contact (3, 4) including a main contact (30, 40 respectively) and an arcing contact (31, 41 respectively), with one of the two contacts (3) being fixed to a blast or extinguishing nozzle (32). According to the invention, the second contact (4) and the drive bar (70) are joined together by coupling means (6) in such a way that they move together in translation in the same direction, the transmission means (5) being disposed on the side (21) of the chamber (2) that is adjacent to the drive bar (70), and are adapted to transmit the motion of the driven second contact (4) to the first contact (3).

Abstract: The invention secures superior performance by restraining carbon generation also when using as an arc extinguishing medium a gas comprising the element C and having a global warming potential lower than that of SF6 gas. A fixed contact section and a movable contact section are arranged opposite each other inside a sealed container filled with an insulating gas. A fixed arc contact and a movable arc contact are provided in the fixed contact section and the movable contact section. The insulating gas is a mixed gas of a gas comprising the element C, as the main constituent, and other gases. The presence of O2 gas in the mixed gas has the effect of restraining the amount of carbon generated. Adding H2 to the mixed gas has the effect of enhancing arc extinguishing performance, compensating for the diminished performance derived from not using actively the thermal energy of the arc.

Abstract: A puffer-type gas blast circuit breaker is capable of restraining reduction in creepage insulation resistance of an insulating support and an insulating rod due to insulating gas of high temperature. An electrode section is mounted on a stationary member supported on an insulating support, and a stationary side arc contact and moving side arc contact are disposed facing each other to contact and separate; a hollow piston rod and an insulating rod are connected to the moving side arc contact, and inserted in a stationary member body portion; and a gas flow blocking member is mounted on an end of the piston rod to prevent an insulating gas heated and coming to the stationary side from getting into the insulating rod side. The stationary member body portion is formed cylindrical so that a gap between the body portion of the stationary member and the gas flow blocking member is minimized.

Abstract: The heavy-duty circuit-breaker with arc blowing has an element which is sensitive to hot gas and/or to gas pressure and is protected by means of a seal against a hot-gas flow. The seal is advantageously a movable non-contacting seal. The seal has a channel entrance for production of a partial hot-gas flow of the hot-gas flow and, connected downstream from this, a channel in order to reduce the mass flow of the partial hot-gas flow, and an expansion chamber in order to expand the volume of the partial hot-gas flow. The expansion chamber is a pressure-relief area. The element may, for example, be a guide element, a contact-making element or a sealing element.

Abstract: In order to reduce the breaking energy of a high-voltage or medium-voltage circuit-breaker, the interrupting chamber (10) contains two contacts (12, 14) mounted to move in opposite directions, and actuated via a single device (20). The two contacts (12, 14) are surrounded by an insulating casing (18) of tubular shape, coupled in fixed manner to the main contact (12). The contacts (12, 14) are actuated by a device having a lever (24) in which each lever arm is coupled to a link, one of the links (32) being secured to the insulating casing (18) and the other link (34) being secured to the second contact (14). The guiding of the drive tube (18) on the main contacts (12b, 14b) makes it possible to improve breaking by keeping clean gas between said main contacts.

Abstract: The heavy-duty circuit-breaker having an axis (A), and having an arcing contact piece, a current-carrying element and an erosion protection element, with the arcing contact piece having an opening in order to carry an essentially axial flow of a gas which has been heated by an arc, and together with the current-carrying element forms a flat contact (F) in order to carry a short-circuit current (I) which flows through the arcing contact piece and the current-carrying element, and with the erosion protection element essentially shielding the current-carrying element from the flow close to the flat contact (F), is characterized in that the current-carrying element has an axial area in which a radial internal dimension (d2) of the current-carrying element increases in steps or continuously as the distance from the flat contact (F), measured parallel to the axis (A), increases.

Abstract: A current-interrupting chamber (1) filled with a dielectric fluid (3) and including: a moving assembly (10) mounted to move axially between a position at the start of a circuit-breaker opening operation and a position at the end of a circuit-breaker opening operation, said moving assembly comprising: at least one first compression chamber (5) whose volume decreases between the start position and a position in which the first chamber (5) is open; at least one first arcing contact (8) designed to co-operate with a second arcing contact (7); and at least one second compression chamber (13), communicating with the first compression chamber (5), the volume of said second compression chamber decreasing between the start position and the end position, said second compression chamber being designed to inject fluid (3) into the first compression chamber (5), between the open position and the end position, when the pressure in the first chamber (5) is lower than the pressure in the second chamber (13).

Abstract: An exemplary circuit breaker has in an enclosure filled with an insulating gas at least one interrupting chamber extending along a longitudinal axis. The interrupting chamber can be configured radially symmetrically and contains an arcing volume and at least two associated arcing contacts. The arcing volume is actively connected to at least one exhaust having an exhaust volume. The exhaust is constructed for cooling hot gases generated during breaking operations and is connected to a volume of the interrupting chamber. The breaking capacity of this circuit breaker can be increased significantly and the exhaust can be constructed in a comparatively simple and cost effective manner. This can be achieved by providing in the area of the exhaust at least one forcibly created recirculation area which increases the flow resistance of the hot gases.

Abstract: A puffer type gas circuit breaker has a piston, which is connected with a center shaft via a link mechanism. At an initial stage of an interruption operation, the link mechanism drives a puffer cylinder and the piston both in an interruption direction while maintaining an almost constant distance therebetween. Even when a pressure rise occurs in a compression chamber by the heat of an arc generated in accordance with opening between a fixed arc contact and a movable arc contact, the pressure rise does not become an operation counterforce to an operator. At a final stage of the interruption operation where the fixed arc contact is removed from a throat of an insulating nozzle, the link mechanism drives the piston in an almost stopped status.

Abstract: A circuit breaker comprises a puffer volume (9) and at least one overpressure valve (16) for dis-charging gas from the puffer volume (9), if the pressure therein exceeds a given threshold. The overpressure valve (16) is formed by a piston (17) and a spring (19) as well as by a cavity (18) in the stationary support body (10) of the moveable contact assembly (2). The overpressure valve (16) is of compact and simple design, has low hysteresis and large cross-section.

Abstract: An interrupter unit (1) for a high-voltage power switch supported by a supporting element (5,6) radially surrounding the interrupter element (1) and consisting of two sections (5a, 5b, 6a, 6b). The second section (5b, 6b) is radially enlarged in relation to the first section (5a,6a). A discharge opening (10,11) for a quenching gas arising during a switching process is disposed between the two sections (5a, 5b, 6a, 6b).

Abstract: A switching mechanism of a circuit breaker for a gas insulated switchgear is able to extinguish arc gas by changing a volume of a compressing chamber without increasing a stroke of a movable cylinder and without increasing required output power of an actuator.

Abstract: A hollow contact tube is provided in a compressed gas-blast circuit breaker in order to improve dielectric properties. The outlet (6) of said contact tube cooperates with a deflecting body (9) and is surrounded by a fixed substantially hollow cylindrical flow director (8).

Abstract: The gas-blasted circuit-breaker includes a movable arc contact, a fixed arc contact opposing the movable arc contact, an insulating nozzle, a puffer cylinder, a hollow conductor, an insulating rod connected to the puffer cylinder, and a fixed piston fitted inside the puffer cylinder. An insulating gas is ejected to a space between the puffer cylinder and the fixed piston by driving the insulating rod and is sprayed to an arc generated upon interruption of a current. The hollow conductor is in a cylindrical shape having a cross section parallel to the axis thereof. The cross section is smaller in diameter on the downstream side of a flow of insulating gas. The hollow conductor has a closed end on the downstream side of the flow of insulating gas and has a cylindrical barrel portion provided with a plurality of opening.

Abstract: A circuit-breaker includes two contacts which are disposed in an interrupting space filled with a dielectric gas under pressure and between which an electric arc strikes during circuit-breaker opening, a thermal blast chamber communicating directly with the interrupting space, and a piston-driven compression chamber communicating with the thermal blast chamber. The piston-driven compression chamber communicates with the interrupting space via a discharge channel that is separate from the thermal blast chamber and that is closed by a discharge valve.

Abstract: In order to provide a gas circuit breaker capable of reducing a remarkable degradation of dielectric strength in the vessel caused by hot gas and which can be downsized, the present invention is characterized by a hot gas discharge mechanism of the movable opening/closing mechanism, which is designed to ensure that the hot gas separated and fed to a movable opening/closing mechanism is discharged from an exhaust outlet 19b toward the side opposite to the puffer chamber 26 of the gas discharge chamber 28 formed on the rear of the puffer chamber 26, and gas is discharged toward the inner surface of the vessel 4 through the exhaust outlet 23b after gas temperature and velocity have been interrupted by convection of the gas in the puffer chamber 26. This structure interrupts a remarkable degradation of dielectric strength in the vessel resulting from direct blowing of hot gas onto the inner surface of the vessel 4.

Abstract: A circuit-breaker including a first tube, and a second tube coaxial to the first tube, the first and second tubes being connected together via a piston provided with perforations and equipped with a valve member, the first tube having an end connecting to said piston, a moving arcing contact support being fixed rigidly to said piston on the other side from the first tube, wherein, with said piston having a bore of diameter D, said piston is provided with a groove, that end of said first tube which is connected to said piston being provided with n gaps allowing n claws to project, the end of at least one of the claws being provided with a rim that is received in said groove in said piston, said piston being provided with one or more passageways angularly in register with each claw provided with a rim, and making it possible for the rim(s) to be inserted axially as far as said groove, and then for the tube to be turned to cause the rim to penetrate into the groove portions that remain, and wherein said arcing c

Abstract: A simple high-speed circuit breaker which is cheap to produce is specified for alternating currents which have to be switched off, which switches such currents off within one half-cycle at the current zero crossing, by means of a gas-generating explosive charge (4). In this case, a switching piston (2) which makes a sliding contact with a consumable contact pin (K1) of a first electrode (E1) when the high-speed circuit breaker is closed, moves in the direction of a hollow electrode (E2). The switching piston (2) has a contact tube (2′) with an exhaust opening (3) which is closed by the hollow electrode (E2) when the high-speed circuit breaker is closed, and is open to an exhaust chamber (8) when the high-speed circuit breaker is open (left-hand half of the figure). The contact tube (2′) moves in a sliding manner in a cutout in the hollow electrode (E2). A plurality of explosive charges (4) may be accommodated in the first electrode (E1).

Abstract: The invention relates to a compressed gas switch with two contact pieces, a contact element by-passing the contact pieces when in the on position, and two isolating distances connected to each other in series. The second contact piece opposing the first isolating distance is arranged axially by an annular piston to be displaceable forming a switching chamber. The switching chamber is separated from the heating chamber by a bulkhead partition having a current-dependent valve, and the second isolating distance is produced after opening of a blowing hole located between the second contact piece and the contact element.

Abstract: Arranged in the continuation of an arcing chamber (16) bounded by consumable rings (32a, 32b) are pressure chambers (25a, 25b) which are connected in each case to a heating volume (18), which concentrically surrounds the arcing chamber (16), via a return channel (28; 28b), which is rotationally symmetrical with reference to the switching axis and is at least initially of increasing cross section, and a non-return valve (29a; 29b). A circumferential blowout slot (19) opening into the arcing chamber (16) between the consumable rings (32a, 32b) issues from the heating volume (18). The pressure chambers (25a, 25b) are, moreover, connected via in each case a plurality of exhaust tubes (34a, 34b) to exhaust volumes (30a, 30b) and to one of them also via a pressure relief valve (37).

Abstract: A medium- and high-voltage gas-insulated circuit breaker with arc quenching capability, comprising an electrical contact which is provided with a fixed element and with a movable element which can be mutually coupled and which form, upon separation, an arc channel into which a blast of gas is introduced which is generated by a gas chamber provided with an orifice which is controlled by a valve. The particularity of the invention is constituted by the fact that the valve is driven by the current that flows across the electrical contact.

Abstract: A method for retaining a movable contact in a circuit interrupter is applicable to interrupters including first and second contacts, at least one of the contacts being movable. A movable element supporting the movable contact is displaceable between a conducting position wherein the movable contact abuts a cooperating contact to complete a current carrying path through the device, and a non-conducting position wherein the movable contact is electrically separated from the cooperating contact. In accordance with the method, the movable contact is displaced by an interrupt initiation device, and a carrier or retainer is displaced by gas pressure resulting from arcs generated by movement of the contact. The carrier is guided in its displacement within the device housing from a normal operating position to a retaining position. The carrier includes an abutment element that physically contacts the movable element to prevent it from rebounding into contact with the cooperating contact.