EP3469618B1 - Unité coupe-circuit pour disjoncteur - Google Patents

Unité coupe-circuit pour disjoncteur Download PDF

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Publication number
EP3469618B1
EP3469618B1 EP17739931.8A EP17739931A EP3469618B1 EP 3469618 B1 EP3469618 B1 EP 3469618B1 EP 17739931 A EP17739931 A EP 17739931A EP 3469618 B1 EP3469618 B1 EP 3469618B1
Authority
EP
European Patent Office
Prior art keywords
channel
hot gas
housing
nozzle
compression
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17739931.8A
Other languages
German (de)
English (en)
Other versions
EP3469618A1 (fr
Inventor
Radu-Marian Cernat
Volker Lehmann
Andrzej Nowakowski
Frank Reichert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP3469618A1 publication Critical patent/EP3469618A1/fr
Application granted granted Critical
Publication of EP3469618B1 publication Critical patent/EP3469618B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/74—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/82—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/906—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism with pressure limitation in the compression volume, e.g. by valves or bleeder openings

Definitions

  • the invention relates to an interrupter unit for a circuit breaker.
  • the interrupter unit has two electrically conductive arcing contact pieces that can be moved relative to one another along a switching path between a switched-off position in which the arcing contact pieces are separated from one another by the switching path, and a switched-on position in which the arcing contact pieces are in galvanic contact with one another.
  • the interrupter unit has an insulating material nozzle that at least partially surrounds the switching path.
  • the invention relates to an interrupter unit such. B. from the EP 0 783 173 A1 known, which discloses an interrupter unit according to the preamble of claim 1, for a circuit breaker designed in the form of a so-called self-blowing switch.
  • self-blowing switches convert the energy released by an arc burning between the arcing contact pieces to build up an extinguishing pressure to the extinguisher: the arc.
  • an arc chamber in which the arc burns is connected to a heating volume in which insulating gas heated and expanding by the arc, insulating nozzle material released by ablation and thermal radiation from the arc chamber increase the gas pressure.
  • the insulating gas in the heating volume is used to extinguish the arc.
  • the power converted in the arc does not cause a sufficient pressure build-up in the heating volume, so that compressed extinguishing gas is used to support the movement of the switch.
  • the invention is based on the object of specifying an improved interrupter unit for a circuit breaker.
  • the arcing contact pieces can be moved relative to one another along a switching path between a switched-off position in which the arcing contact pieces are separated from one another by the switching path, and a switched-on position in which the arcing contact pieces are in galvanic contact with one another.
  • the insulating material nozzle at least partially surrounds the switching path.
  • a nozzle channel runs through the insulating material nozzle, through which the switching path runs and which is connected to the heating volume.
  • the separating housing divides the heating volume into a cold gas area and a hot gas area and has at least one connection opening connecting the cold gas area to the hot gas area.
  • the cold gas duct runs through a nozzle duct end section of the nozzle duct and is connected to the cold gas region of the heating volume.
  • the hot gas channel runs through the nozzle channel end section of the nozzle channel and is connected to the hot gas area of the heating volume.
  • the interrupter unit is particularly advantageously suitable for a power switch in the form of a self-blowing switch.
  • the heating volume serves as a reservoir for storing insulating gas, which is used to extinguish an arc burning between the arcing contact pieces during a switch-off process.
  • a switch-off process is understood to mean a movement of the arcing contact pieces from the switch-on position into the switch-off position.
  • the hot gas duct enables insulating gas to be conducted between the arc chamber, in which the arc burns in the nozzle duct, and the heating volume. During the switch-off process, insulating gas is heated and expanded by the arc passed into the heating volume and the pressure in the heating volume increases.
  • the power converted in the arc does not cause a sufficient pressure build-up in the heating volume, so that additional compressed insulating gas is passed into the heating volume.
  • the larger the heating volume the lower the pressure increase in the heating volume due to the additional insulating gas.
  • the division of the heating volume into a cold gas area and a hot gas area makes it possible that additional insulating gas is only or predominantly directed into one of these areas and thus, due to the smaller volume of this area compared to the entire heating volume, a greater pressure increase is achieved by the additional insulating gas in this area than in in the event that the additional insulating gas is evenly distributed over the entire heating volume. This advantageously increases the extinguishing effect of the additional insulating gas.
  • a first arcing contact piece has a contact end with a contact opening into which the second arcing contact piece is retracted in the switched-on position, and that the hot gas duct surrounds the contact end of the first arcing contact piece, while the cold gas duct surrounds the hot gas duct. Because the hot gas duct surrounds the contact end of the first arcing contact piece and the cold gas duct surrounds the hot gas duct, the hot gas duct is released sooner than the cold gas area when the arcing contact pieces are separated. Thus, pressure is built up in the heating volume via the hot gas duct at a point in time at which the cold gas duct is not yet released.
  • the delayed release of the cold gas duct ensures that at this point in time the pressure difference between the arc chamber and the heating volume is lower, so that only a little hot gas reaches the heating volume via the cold gas duct.
  • insulating gas escapes both via the cold gas and the hot gas duct the heating volume.
  • there is a temperature gradient inside the heating volume as a result of which the cold gas flow is fed from the cold gas area, while the hot gas flow is fed from the hot gas area.
  • the joint action of both channels means that the arc flows over a greater axial extent, and a pronounced dielectrically strengthened area is created, which contributes to successful extinguishing.
  • One embodiment of the invention provides a duct partition which separates the cold gas duct and the hot gas duct from one another and which is designed, for example, essentially as a hollow cylinder.
  • a duct partition wall separating the cold gas duct and the hot gas duct from one another simultaneously delimits the cold gas duct and the hot gas duct and therefore enables the cold gas duct and the hot gas duct to be constructed in a component-saving manner.
  • the duct partition wall preferably protrudes into the nozzle duct end section and the cold gas duct is bordered by an outer surface of the duct partition wall and an inner surface of the insulating material nozzle which borders the nozzle duct end section.
  • This embodiment of the invention therefore provides that the cold gas duct forms an outer area of the nozzle duct end section and the hot gas area forms an inner area of the nozzle duct end section. This realizes the advantageous arrangement of the cold gas duct already described above around the hot gas duct.
  • the duct partition wall is part of the partition housing.
  • the duct partition wall preferably forms a housing end section of the partition housing facing the switching path.
  • the separating housing is designed, for example, like a funnel, the channel separating wall forming a housing neck which protrudes into the nozzle channel end section and is followed by a housing body which is arranged in the heating volume and has a larger inner diameter than the housing neck. Execution the duct partition wall as part of the partition housing enables the partition housing and the duct partition wall to be designed in one piece and thereby simplifies the manufacture and assembly of the partition housing and the duct partition wall.
  • the design of the duct partition wall as a housing end section of the separating housing facing the switching path takes into account that there is insufficient space available along the switching path to accommodate the separating housing, since the arcing contact pieces move relative to one another in this area of the interrupter unit.
  • the funnel-like design of the separating housing enables a suitable division of the heating volume into a cold gas area and a hot gas area and the formation of the cold gas channel and the hot gas channel through the separating housing.
  • Another embodiment of the invention provides that the nozzle channel widens to the nozzle channel end section. This embodiment of the invention enables or simplifies the arrangement of the cold gas duct and the hot gas duct in the nozzle duct end section.
  • the invention provides a compression volume which is separated from the heating volume by a compression wall.
  • the compression wall is coupled to an arcing contact piece so that it reduces the compression volume in the event of a relative movement of the arcing contact pieces from the switched-on position to the switched-off position.
  • the compression wall has at least one compression wall opening which is closed by an overflow valve when the pressure in the heating volume is greater than the pressure in the compression volume.
  • the invention further provides that the overflow valve closes at least one connection opening between the cold gas area and the hot gas area of the heating volume when the pressure in the heating volume is less than the pressure in the compression volume.
  • This further development of the invention uses the overflow valve not only to close the compression volume at high pressures in the heating volume, but also to at least partially close the hot gas area at low pressures in the hot gas area.
  • compressed insulating gas is advantageously passed from the compression volume only or at least predominantly into the cold gas area, so that the compressed insulating gas from the compression volume in the cold gas area generates a greater pressure increase than would be the case if the compressed insulating gas from the compression volume were uniform would be distributed over the entire heating volume.
  • Another embodiment of the invention provides that the cold gas channel protrudes further into the nozzle channel than the hot gas channel. This embodiment of the invention also has the effect that the hot gas duct is released sooner when the arcing contact pieces are separated than the cold gas area with the advantages already mentioned above.
  • a circuit breaker according to the invention has an interrupter unit according to the invention with the advantages already mentioned above.
  • Figure 1 shows a perspective sectional illustration of a first embodiment of an interrupter unit 100 for a circuit breaker.
  • the interrupter unit 100 has an essentially rotationally symmetrical structure which extends around a longitudinal axis 1.
  • the interrupter unit 100 has a first arcing contact piece 5 and a second arcing contact piece 6.
  • a first rated current contact piece 3 is assigned to the first arcing contact piece 5.
  • a second rated current contact piece 4 is assigned to the second arcing contact piece 6.
  • the rated current contact pieces 3, 4 and the arcing contact pieces 5, 6 are each formed rotationally symmetrical to the longitudinal axis 1 and are arranged coaxially to the longitudinal axis 1.
  • the first arcing contact piece 5 is tubular and has a contact end 20 facing the second arcing contact piece 6 with a tulip-shaped contact opening 21 and a protective sleeve 9 made of an electrically insulating material surrounding an end section.
  • the second arcing contact piece 6 is designed in the shape of a bolt so that it can be moved into the contact opening 21 of the first arcing contact piece 5 with galvanic contact.
  • the second rated current contact piece 4 has a multiplicity of contact fingers 22 which are elastically deformable and can be moved onto a lateral surface 23 of the first rated current contact piece 3 to make contact with the first rated current contact piece 3.
  • the first rated current contact piece 3 and the first arcing contact piece 5 belong to one another and always have the same electrical potential regardless of a switching state of the interrupter unit 100.
  • the second rated current contact piece 4 and the second arcing contact piece 6 also belong to one another and always have the same electrical potential regardless of the switching state of the interrupter unit 100.
  • the rated current contact pieces 3, 4 and the arcing contact pieces 5, 6 are along the longitudinal axis 1 relative to one another between a in Figure 1 shown switch-off position and a switch-on position movable.
  • the switched-off position the two arcing contact pieces 5, 6 are separated from one another by a switching path 2.
  • the two rated current contact pieces 3, 4 are separated from one another in the switched-off position.
  • the second arcing contact piece 6 is inserted into the contact opening 21 of the first arcing contact piece 5 and the contact fingers 22 of the second nominal current contact piece 4 rest on the lateral surface 23 of the first nominal current contact piece 3.
  • the arcing contact pieces 5, 6 contact each other before the rated current contact pieces 3, 4.
  • the rated current contact pieces 3, 4 separate first and then the arcing contact pieces 5, 6.
  • An insulating material nozzle 7 is provided in order to direct and conduct the arc.
  • the insulating material nozzle 7 has a nozzle channel 8.
  • the nozzle channel 8 is designed to be rotationally symmetrical and has a channel constriction 24, the diameter of which corresponds to a diameter of the second arcing contact piece 6.
  • the insulating material nozzle 7 at least partially surrounds the switching path 2 and is aligned coaxially to the longitudinal axis 1.
  • the nozzle channel 8 widens towards a nozzle channel end section 25 into which the first arcing contact piece 5 projects.
  • the insulating material nozzle 7 has a circumferential nozzle collar 26 on the outer jacket side, which runs in a ring around the first arcing contact piece 5 and is mounted in an opposite recess on the first rated current contact piece 3.
  • the heating volume 10 extends radially with respect to the longitudinal axis 1 between an outer surface of the first arcing contact piece 5 and an inner surface of the first rated current contact piece 3.
  • the heating volume 10 extends axially with respect to the longitudinal axis 1 between an end of the insulating material nozzle 7 facing away from the second arcing contact piece 6 and a compression wall 27, which separates the heating volume 10 from a compression volume 28.
  • the compression wall 27 is connected to the first arcing contact piece 5 and, when the first arcing contact piece 5 is switched off, moves away from the second arcing contact piece 6, reducing the compression volume 28 during the movement and compressing insulating gas in the compression volume 28.
  • the compression wall 27 has a plurality of compression wall openings 29 to the heating volume 10.
  • a separating housing 11 divides the heating volume 10 into a cold gas area 31 and a hot gas area 32. Furthermore, the separating housing 11 divides the nozzle channel end section 25 into a cold gas channel 33 connected to the cold gas area 31 and a hot gas channel 34 connected to the hot gas area 32.
  • the separating housing 11 is essentially rotationally symmetrical formed around the longitudinal axis 1 and surrounds a End section of the first arcing contact piece 5 having contact end 20.
  • the separating housing 11 is funnel-shaped with a housing body 30 arranged in the heating volume 10 and a housing neck protruding into the nozzle channel end section 25.
  • the housing neck has a hollow cylindrical channel partition 35 between the cold gas channel 33 and the hot gas channel 34 and a housing opening 36 of the separating housing 11 on the switching path side.
  • the cold gas duct 33 is bordered by an outer surface of the duct partition 35 and an inner surface of the insulating material nozzle 7 which borders the nozzle duct end section 25.
  • the hot gas channel 34 is bordered by an inner surface of the channel partition 35 and an outer surface of the first arcing contact piece 5.
  • the housing body 30 of the separating housing 11 is formed by a housing jacket 37, a housing shoulder 38 and a housing collar 39.
  • the housing jacket 37 is designed as a hollow cylinder, the cylinder axis of which is the longitudinal axis 1 and which has a larger inner diameter than the duct partition wall 35.
  • the housing shoulder 38 connects the housing jacket 37 to the duct partition 35.
  • the housing collar 39 forms an end of the partition housing 11 facing away from the switching path 2 and facing the compression volume 28.
  • the housing collar 39 projects inward from the housing body 30 and extends from the housing body 30 up to the first arcing contact piece 5, which is guided through the housing collar 39.
  • the housing collar 39 runs parallel to the compression wall 27 and is spaced apart from the compression wall 27.
  • the housing collar 39 has a plurality of connection openings 40 which lie opposite the compression wall openings 29 in the compression wall 27.
  • the area of the heating volume 10 surrounded by the separating housing 11 forms the hot gas area 32 of the heating volume 10, the remaining area of the heating volume 10 forms the cold gas area 31.
  • an overflow valve 41 is arranged, which runs annularly around the first arcing contact piece 5.
  • the spill valve 41 is between an in Figure 1 illustrated first valve position and a second valve position movable. In the first valve position the overflow valve 41 closes the compression wall openings 29 in the compression wall 27, in the second valve position the overflow valve 41 closes the connection openings 40 in the housing collar 39.
  • the valve position of the overflow valve 41 depends on the pressure difference between the pressure in the compression volume 28 and the Pressure in the heating volume 10 in the area of the overflow valve 41. When the pressure in the compression volume 28 is less than this pressure in the heating volume 10, the overflow valve 41 assumes the first valve position. If the pressure in the compression volume 28 is greater than this pressure in the heating volume 10, the overflow valve 41 assumes the second valve position.
  • the compression volume 28 is followed by a pressure relief chamber 42 which has a pressure relief valve 43 for the compression volume 28. If the pressure in the compression volume 28 exceeds a pressure threshold value, the pressure relief valve 43 opens so that insulating gas can flow from the compression volume 28 into the pressure release chamber 42 and through chamber openings 45 of the pressure release chamber 42 from the pressure release chamber 42.
  • the pressure relief valve 43 of this exemplary embodiment is designed to be spring-loaded, so that the pressure threshold value is determined by a preload of a spring 44.
  • the interrupter unit 100 When the interrupter unit 100 is in operation, the interrupter unit 100 is filled with an insulating gas, for example with sulfur hexafluoride, nitrogen or another suitable gas. Insulating gas is located in particular in the nozzle channel 8, the heating volume 10 and the compression volume 28.
  • an arc burns between the two arcing contact pieces 5, 6.
  • the arc heats insulating gas in its surroundings, which then expands and mainly through the hot gas duct 34 into the The hot gas region 32 of the heating volume 10 flows because the hot gas duct 34 is released upstream of the cold gas duct 33 when the arcing contact pieces 5, 6 are separated.
  • the insulating gas flowing into the hot gas area 32 increases the pressure in the hot gas area 32.
  • the movement of the compression wall 27 compresses the insulating gas in the compression volume 28 and increases the pressure in the compression volume 28.
  • the pressure increase in the hot gas area 32 is dependent on the current strength. With small currents, the pressure increase in the hot gas area 32 is relatively small, so that the pressure generated in the compression volume 28 is greater than the pressure in the hot gas area 32 and the overflow valve 41 assumes the second valve position in which it connects the connection openings 40 in the housing collar 39 of the separating housing 11 closes. As a result, the cold gas area 31 is separated from the hot gas area 32 and connected to the compression volume 28 via the compression wall openings 29 in the compression wall 27, so that insulating gas flows from the compression volume 28 into the cold gas area 31.
  • the insulating gas flows from the cold gas region 31 through the cold gas duct 33 to the arc and finally extinguishes the arc. Since the hot gas area 32 is closed by the overflow valve 41, the space of the heating volume 10 available for the insulating gas flowing out of the compression volume 28 is reduced to the cold gas area 31, which advantageously reduces the pressure in the insulating gas and thus the extinguishing effect of the insulating gas in relation to a situation , flows in the insulating gas from the compression volume 28 into the entire heating volume 10, can be increased.
  • the pressure increase in the hot gas area 32 is correspondingly large, so that the pressure in the hot gas area 32 is greater than the pressure generated in the compression volume 28 and the overflow valve 41 assumes the first valve position in which it connects the connection openings 40 in the housing collar 39 of the separating housing 11 releases and the compression wall openings 29 in the compression wall 27 closes.
  • heated insulating gas flows through the connection openings 40 from the hot gas area 32 into the cold gas area 31 and increases the pressure in the cold gas area 31 Cold gas area 31 through the cold gas channel 33 and from the hot gas area 32 through the hot gas channel 34 to the arc and finally extinguishes the arc.
  • the interaction of the cold gas duct 33 and the hot gas duct 34 improves the extinguishing effect of the insulating gas by increasing the axial extent over which the arc is flowed with insulating gas. A dangerous overpressure arising in the compression volume 28 is reduced via the pressure relief chamber 42.
  • FIG. 13 shows a sectional view of the interrupter unit 100 for a circuit breaker not belonging to the present invention.
  • the interrupter unit 100 differs from that in FIG Figure 1 illustrated embodiment essentially only by the design and arrangement of the separating housing 11 and the shape of the nozzle channel end section 25 and the associated design of the cold gas area 31, the hot gas area 32, the cold gas channel 33 and the hot gas channel 34.
  • the separating housing 11 is funnel-shaped with a housing body 30 arranged in the heating volume 10 and a housing neck protruding into the nozzle channel end section 25.
  • the case neck differs from the case neck of the in Figure 1 separating housing 11 shown in that the end of the housing neck has the same wall thickness as the rest of the housing neck, while the end of the housing neck of the separating housing 11 shown in Figure 1 has a greater wall thickness than the rest of the housing neck.
  • the end of the housing neck is slightly bent towards the contact end 20 of the first arcing contact piece 5.
  • the housing body 30 differs from the housing body 30 of FIG Figure 1 shown separating housing 11 in that it does not have a housing collar 39, that the housing jacket 37 has several connection openings 40 to the cold gas region 31, and that the housing shoulder 38 is less steep.
  • the housing jacket 37 is connected to the compression wall 27.
  • the compression wall openings 29 in the compression wall 27 open directly into the hot gas region 32.
  • the overflow valve 41 is arranged in the hot gas region 32 in front of the compression wall openings 29.
  • the spill valve 41 is between an in Figure 2 illustrated first valve position and a second valve position is movable.
  • the overflow valve 41 closes the compression wall openings 29 in the compression wall 27; in the second valve position, the overflow valve 41 opens the compression wall openings 29, being spaced from the compression wall openings 29.
  • the valve position of the overflow valve 41 depends on the pressure difference between a pressure in the compression volume 28 and a pressure in the hot gas region 32.
  • the overflow valve 41 assumes the first valve position.
  • the overflow valve 41 assumes the second valve position.
  • connection openings 40 in the separating housing 11, which connect the hot gas area 32 to the cold gas area 31, cannot be closed.
  • insulating gas always flows from the hot gas region 32 into the cold gas region 31.
  • the overflow valve 41 closes the compression wall openings 29 in the event of high currents, so that in this case the arc is only extinguished by insulating gas from the cold gas area 31 and the hot gas area 32.
  • insulating gas is added from the compression volume 28, which enters the hot gas area 32 through the compression wall openings 29 and is directed from there by the overflow valve 41 located in front of the compression wall openings 29 mainly to connection openings 40 and flows through these connection openings 40 into the cold gas area 31 so that the insulating gas flowing out of the compression volume 28 predominantly flows into the cold gas region 31.

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  • Circuit Breakers (AREA)

Claims (11)

  1. Unité (100) de coupe-circuit d'un disjoncteur, comprenant
    - deux pièces (5, 6) de contact d'arc électrique conductrices de l'électricité, qui, le long d'une section (2) de coupure, sont mobiles l'une par rapport à l'autre entre une position de déconnexion, dans laquelle les pièces (5, 6) de contact d'arc électrique sont séparées l'une de l'autre par la section (2) de coupure, et une position de connexion, dans laquelle les pièces (5, 6) de contact d'arc électrique sont en contact galvanique entre elles,
    - une buse (7) isolante entourant, au moins en partie, la section (2) de coupure et ayant un conduit (8) de la buse, qui s'étend dans la buse (7) isolante et dans lequel s'étend la section (2) de coupure,
    - un volume (10) de chauffage relié au conduit (8) de la buse,
    - une enveloppe (11) de séparation, qui subdivise le volume (10) de chauffage en une région (31) de gaz froid et en une région (32) de gaz chaud et qui a au moins une ouverture (40) de communication mettant la région (31) de gaz froid en communication avec la région (32) de gaz chaud,
    - un conduit (33) pour du gaz froid, qui s'étend dans un tronçon (25) d'extrémité de buse du conduit (8) de la buse et qui communique avec la région (31) de gaz froid du volume (10) de chauffage, et
    - un conduit (34) pour du gaz chaud, qui s'étend dans le tronçon (25) d'extrémité du conduit (8) de la buse et qui communique avec la région (32) de gaz chaud du volume (10) de chauffage,
    - un volume (28) de compression, qui est séparé du volume (10) de chauffage par une paroi (27) de compression, la paroi (27) de compression étant adjointe à une pièce (5, 6) de contact d'arc électrique, de manière à ce qu'elle diminue le volume (28) de compression, lors d'un déplacement relatif des pièces (5, 6) d'arc électrique de la position de connexion à la position de déconnexion, et la paroi (27) de compression ayant au moins une ouverture (29) de paroi de compression, qui est fermée par une soupape (41) de décharge, si une pression dans le volume (10) de chauffage dans la région de la soupape (41) de décharge est plus grande qu'une pression dans le volume (28) de compression, caractérisée en ce que
    la soupape (41) de décharge ferme au moins une ouverture (40) de communication entre la région (31) de gaz froid et la région (32) de gaz chaud, si la pression dans le volume (10) de chauffage est plus petite que la pression dans le volume (28) de compression.
  2. Unité (100) de coupe-circuit suivant la revendication 1, caractérisée en ce que
    une première pièce (5) de contact d'arc électrique a une extrémité (20) de contact ayant une ouverture (21) de contact, dans laquelle la deuxième pièce (6) de contact d'arc électrique est entrée dans la position de connexion, et en ce que le conduit (34) pour du gaz chaud entoure l'extrémité (20) de contact de la première (5) pièce de contact d'arc électrique et le conduit (33) pour du gaz froid entoure le conduit (34) pour du gaz chaud.
  3. Unité (100) de coupe-circuit suivant l'une des revendications précédentes,
    caractérisée par
    une paroi (35) de séparation de conduit séparant le conduit (33) pour du gaz froid et le conduit (34) pour du gaz chaud l'un de l'autre.
  4. Unité (100) de coupe-circuit suivant la revendication 3, caractérisée en ce que
    la paroi (35) de séparation de conduit est réalisée sensiblement sous la forme d'un cylindre creux.
  5. Unité (100) de coupe-circuit suivant la revendication 3 ou 4,
    caractérisée en ce que
    la paroi (35) de séparation de conduit pénètre dans le tronçon (25) d'extrémité du conduit de buse et le conduit (33) pour du gaz froid est bordé par une surface extérieure de la paroi (35) de séparation de conduit et par une surface intérieure, bordant le tronçon (25) d'extrémité du conduit de buse, de la buse (7) isolante.
  6. Unité (100) de coupe-circuit suivant l'une des revendications 3 à 5,
    caractérisée en ce que
    la paroi (35) de séparation de conduit fait partie de l'enveloppe de séparation.
  7. Unité (100) de coupe-circuit suivant la revendication 6, caractérisée en ce que
    la paroi (35) de séparation de conduit forme une partie, tournée vers la section (2) de coupure, de l'enveloppe (11) de séparation.
  8. Unité (100) de coupe-circuit suivant la revendication 6 ou 7,
    caractérisée en ce que
    l'enveloppe (11) de séparation est constituée en étant de type en trémie, la paroi (35) de séparation de conduit formant un col d'enveloppe pénétrant dans le tronçon (25) d'extrémité du conduit de buse, col auquel se raccorde un corps (30) de l'enveloppe, qui est disposé dans le volume (10) de chauffage et qui a un diamètre intérieur plus grand que le col de l'enveloppe.
  9. Unité (100) de coupe-circuit suivant l'une des revendications précédentes,
    caractérisée en ce que
    le conduit (8) de la buse s'élargit en le tronçon (25) d'extrémité du conduit de buse.
  10. Unité (100) de coupe-circuit suivant l'une des revendications précédentes,
    caractérisée en ce que
    le conduit (33) pour du gaz froid pénètre davantage dans le conduit (8) de la buse que ne le fait le conduit (34) pour du gaz chaud.
  11. Disjoncteur ayant une unité (100) de coupe-circuit suivant l'une des revendications précédentes.
EP17739931.8A 2016-08-02 2017-07-06 Unité coupe-circuit pour disjoncteur Active EP3469618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016214196.1A DE102016214196B4 (de) 2016-08-02 2016-08-02 Unterbrechereinheit für einen Leistungsschalter
PCT/EP2017/067000 WO2018024435A1 (fr) 2016-08-02 2017-07-06 Unité coupe-circuit pour disjoncteur

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EP3469618A1 EP3469618A1 (fr) 2019-04-17
EP3469618B1 true EP3469618B1 (fr) 2020-08-26

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US (1) US10685798B2 (fr)
EP (1) EP3469618B1 (fr)
CN (1) CN109564836B (fr)
DE (1) DE102016214196B4 (fr)
WO (1) WO2018024435A1 (fr)

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US10991079B2 (en) 2018-08-14 2021-04-27 Nvidia Corporation Using previously rendered scene frames to reduce pixel noise
DE102019213344A1 (de) * 2019-09-03 2021-03-04 Siemens Energy Global GmbH & Co. KG Unterteilen eines Heizvolumens eines Leistungsschalters
CN112289628B (zh) * 2020-10-20 2023-02-24 西安西电开关电气有限公司 一种双压力膨胀室灭弧室
WO2022178964A1 (fr) * 2021-02-25 2022-09-01 Jst Power Equipment, Inc. Système de commutation ayant un mécanisme d'obturation entraîné par chariot
EP4053873A1 (fr) * 2021-03-04 2022-09-07 General Electric Technology GmbH Buse isolante pour disjoncteur à configuration interne améliorée

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DE19547522C1 (de) * 1995-12-08 1997-01-16 Siemens Ag Hochspannungs-Leistungsschalter mit einem Gasspeicherraum
DE19627098A1 (de) * 1996-07-05 1998-01-08 Asea Brown Boveri Leistungsschalter
FR2751462B1 (fr) * 1996-07-22 1998-08-28 Gec Alsthom T & D Sa Disjoncteur a haute tension a auto-soufflage d'arc
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Publication number Publication date
DE102016214196A1 (de) 2018-02-08
CN109564836A (zh) 2019-04-02
WO2018024435A1 (fr) 2018-02-08
US10685798B2 (en) 2020-06-16
CN109564836B (zh) 2020-07-03
EP3469618A1 (fr) 2019-04-17
DE102016214196B4 (de) 2019-11-21
US20190180963A1 (en) 2019-06-13

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