WO2023126110A1 - Schaltvorrichtung mit trenn- oder erdungsfunktion - Google Patents
Schaltvorrichtung mit trenn- oder erdungsfunktion Download PDFInfo
- Publication number
- WO2023126110A1 WO2023126110A1 PCT/EP2022/083238 EP2022083238W WO2023126110A1 WO 2023126110 A1 WO2023126110 A1 WO 2023126110A1 EP 2022083238 W EP2022083238 W EP 2022083238W WO 2023126110 A1 WO2023126110 A1 WO 2023126110A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact
- arcing
- switching device
- main
- contacts
- Prior art date
Links
- 239000011810 insulating material Substances 0.000 claims description 9
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 229910018503 SF6 Inorganic materials 0.000 description 7
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 7
- 229960000909 sulfur hexafluoride Drugs 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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
- H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
-
- 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
-
- 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
Definitions
- the invention relates to a switching device with an isolating or grounding function and an encapsulating housing filled with insulating gas.
- sulfur hexafluoride is usually used as the insulating gas.
- the dielectric strength of sulfur hexafluoride is sufficient to enable disconnectors and earthing switches arranged in switchgear of this type to function reliably.
- sulfur hexafluoride is a potent greenhouse gas. This is one of the reasons why sulfur hexafluoride is increasingly being replaced by more environmentally friendly insulating gases, in particular artificial air.
- Artificial air is used here to refer to a mixture of oxygen and nitrogen that is produced artificially. This can be a completely synthetically produced mixture of oxygen and nitrogen or processed, in particular cleaned and/or dehumidified, air.
- the invention is based on the object, an improved switching device with separation or grounding function and a with an encapsulating housing filled with insulating gas, in particular with artificial air.
- the object is achieved according to the invention with a switching device having the features of claim 1 .
- a switching device according to the invention with isolating or grounding function includes
- a second contact arrangement with a second main contact and with the second main contact electrically conductively connected to the second arcing contact and
- a nozzle arrangement which is set up for flowing a switching arc between the arcing contacts with I insulating gas, wherein
- the contact assemblies are movable relative to each other between a first end position, in which the main contacts contact each other and the arcing contacts contact each other, and a second end position, in which the main contacts are separated from each other and the arcing contacts are separated from each other, wherein
- the main contacts are separated from one another before the arcing contacts and a switching arc between the arcing contacts is extinguished by flowing the switching arc with insulating gas.
- a switching device with a disconnecting function is also known as a circuit breaker or isolator. Such a switching device is used to disconnect electrical circuits when no load current is flowing. However, prior to separating between contacts of the switching device, an electric current, in particular a reactive current flow.
- a switching device with an earthing function also known as an earthing switch or earth electrode, is used to earth a current path.
- a switching device with an isolating or grounding function includes an encapsulation housing filled with an insulating gas and is therefore designed to be gas-insulated.
- the switching device comprises contact arrangements which can be moved relative to one another and which each have a main contact and an arcing contact which is electrically conductively connected to the main contact. To interrupt a current path, the contact arrangements are separated from one another, the main contacts being separated first and then the arcing contacts being separated from one another. A current flowing between the main contacts before the main contacts are separated commutes to the arcing contacts, so that a switching arc can only occur between the arcing contacts.
- the switching device In order to quench such a switching arc, the switching device has a nozzle arrangement which is set up to flow insulating gas through the switching arc and thereby quench it.
- the invention thus integrates a quenching principle for quenching switching arcs, known from self-blast circuit breakers, into the contact system of a switching device with a disconnecting or grounding function.
- the invention makes it possible to use insulating gases with a lower dielectric strength than, for example, the dielectric strength of sulfur hexafluoride in a gas-insulated switching device with an isolating or grounding function.
- the insulating gas is artificial air.
- the artificial air in the encapsulating housing is preferably subjected to an overpressure in the range from 6 bar to 14 bar compared to a pressure in an area surrounding the encapsulating housing.
- the aforementioned embodiment of the invention is directed towards the use of artificial air as insulating gas and thus towards the use of a particularly environmentally friendly insulating gas.
- the arcing contacts are made of tungsten copper.
- Tungsten-copper is an alloy of tungsten and copper. Such alloys are advantageously suitable as materials for arcing contacts due to the high temperature resistance of tungsten and the high electrical and thermal conductivity of copper.
- the first arcing contact is tubular and the second arcing contact is pin-shaped. Furthermore, the first arcing contact has an inner diameter that corresponds to an outer diameter of the second arcing contact. This configuration of the arcing contacts enables the second arcing contact to be moved into the first arcing contact, in which case the arcing contacts rest against one another and thus have a secure electrical and mechanical connection.
- the first main contact is designed as a metallic sleeve in which the first arcing contact is arranged.
- this advantageously allows the insulating gas to be conducted in and through the first main contact in order to extinguish a switching arc.
- the nozzle arrangement has an insulating material nozzle which is arranged on an inner surface of the first main contact and has a first nozzle section running around an end region of the first arcing contact and a second nozzle section facing the second arcing contact.
- the insulating material nozzle is made of a fluorine-free plastic, for example polypropylene.
- the insulating material nozzle can limit an arc region in which a switching arc burns between the arcing contacts and the flow of insulating gas can be directed.
- the nozzle arrangement has at least one blow-out opening in the first main contact on a side of the first arcing contact that faces away from the second arcing contact.
- the nozzle arrangement has a blowout chamber arranged inside the first main contact on a side of the first arcing contact that faces away from the second arcing contact.
- the two aforementioned configurations of the invention are advantageous in connection with the above-mentioned tubular design of the first arcing contact and its arrangement in a sleeve-shaped first main contact.
- insulating gas heated by a switching arc flows out of the arcing region through the first arcing contact to the at least one blowout opening in the first main contact (see FIGS. 1 to 3 and their description).
- insulating gas heated by a switching arc flows out of the blowout chamber through the first arcing contact into the arcing region (see FIGS. 4 and 5 and their description). In both cases, a switching arc burning in the arc region can be extinguished by the flow of insulating gas.
- the second main contact has elastic contact fingers for making contact with the first main contact. This advantageously allows a reliable electrical and mechanical contact of the main contacts that compensates for manufacturing and movement tolerances.
- FIG. 1 shows a sectional view of a first exemplary embodiment of a switching device in a first end position
- FIG. 2 shows a sectional view of the switching device shown in FIG. 1 in a second end position
- FIG. 3 shows a sectional view of the switching device shown in FIG. 1 in an intermediate position between the two end positions
- FIG. 4 shows a sectional view of a second exemplary embodiment of a switching device in a first intermediate position between the two end positions
- FIG. 5 shows a sectional view of the switching device shown in FIG. 4 in a second intermediate position between the two end positions.
- FIGS. 1 to 3 show sectional views of a first exemplary embodiment of a switching device 1 with an isolating or grounding function.
- the switching device 1 comprises an encapsulating housing 3 , a first contact arrangement 5 , a second contact arrangement 7 and a nozzle arrangement 9 .
- the encapsulating housing 3 is designed to be gas-tight and is filled with artificial air which is subjected to an overpressure in the range from 6 bar to 14 bar compared to the pressure in the surroundings of the encapsulating housing 3 .
- the first contact arrangement 5 has a first main contact 11 and a first arcing contact 13 which is electrically conductively connected to the first main contact 11 .
- the second contact arrangement 7 has a second main contact 15 and a second arcing contact 17 which is electrically conductively connected to the second main contact 15 .
- the first contact arrangement 5 can be moved relative to the second contact arrangement 7 and the encapsulating housing 3 between a first end position and a second end position.
- FIG. 1 shows the switching device 1 in the first end position of the first contact arrangement 5 .
- the main contacts 11, 15 make contact with one another and the arcing contacts 13, 17 make contact with one another.
- FIG. 2 shows the switching device 1 in the second end position of the first contact arrangement 5 .
- the main contacts 11, 15 are separated from one another and the arcing contacts 13, 17 are separated from one another.
- FIG. 3 shows the switching device 1 in an intermediate position of the first contact arrangement 5 during a movement from the first end position into the second end position.
- the main contacts 11, 15 are first separated from one another.
- an electric current flowing between the main contacts 11 , 15 commutes to the arcing contacts 13 , 17 .
- the arcing contacts 13 , 17 are then separated from one another. This creates a switching arc 19 between the arcing contacts 13 , 17 .
- the first arcing contact 13 is tubular.
- the second arcing contact 17 is designed like a pin.
- the arcing contacts 13, 17 are each made of tungsten copper.
- the first arcing contact 13 has an inside diameter that corresponds to an outside diameter of the second arcing contact 17 .
- an end area of the second arcing contact 17 protrudes into the first arcing contact 13 .
- an outer surface of the end region of the second arcing contact 17 is in contact with an inner surface of the first arcing contact 13 .
- the first main contact 11 is designed as a metallic sleeve in which the first arcing contact 13 is arranged.
- the second main contact 15 has elastic contact fingers arranged in a lamellar manner, which rest against an outer surface of the first main contact 11 in the first end position of the first contact arrangement 5 .
- the nozzle arrangement 9 has an insulating material nozzle 21 which is arranged on an inner surface of the first main contact 11 .
- the insulating material nozzle 21 has a first nozzle section 21 . 1 running around an end portion of the first arcing contact 13 , and a second nozzle portion 21 facing the second arcing contact 17 . 2 on .
- the insulating material nozzle 21 is made from a fluorine-free plastic, for example polypropylene.
- the nozzle arrangement 9 comprises a plurality of blow-out openings 23 in the first main contact 11 on a side of the first arcing contact 13 which is remote from the second arcing contact 17 .
- the nozzle arrangement 9 is designed to flow the switching arc 19 between the arcing contacts 13, 17 with artificial air.
- the switching arc 19 causes artificial air in an area surrounded by the insulating material nozzle 21
- An arc region 25 in which the switching arc 19 burns is heated to a great extent, as a result of which the pressure in the arc region 25 increases.
- the artificial air flows from the arcing region 25 through the tube-like first arcing contact 13 to the exhaust openings 23 in the first main contact 11 .
- This flow 26 of the artificial air is indicated by arrows in FIG. 3 and extinguishes the switching arc 19 .
- a first electrode 27 , a second electrode 29 and a lever element 31 are also shown in FIGS. 1 to 3 .
- the first electrode 27 surrounds the first contact arrangement 5 in its second end position and is open to the second contact arrangement 7 .
- the second electrode 29 is arranged in the area of the second contact arrangement 7 and is open towards the first contact arrangement 5 . In its first end position, the first contact arrangement 5 projects into the second electrode 29 .
- the first contact arrangement 5 can be moved via the lever element 31, for example by a motor (not shown). During a movement between its end positions, the first contact arrangement 5 is moved, for example, approximately 50 mm to 300 mm at a speed of less than 5 m/s.
- FIGS. 4 and 5 show sectional views of a second exemplary embodiment of a switching device 1 with an isolating or grounding function. This exemplary embodiment differs from the exemplary embodiment shown in FIGS. 1 to 3 essentially only in the design of the nozzle arrangement 9 .
- the nozzle arrangement 9 in turn has an insulating material nozzle 21 which is arranged on an inner surface of the first main contact 11 .
- the nozzle arrangement 9 also includes, instead of the blow-out openings 23 in the first main contact 11, a blow-out chamber 33 which is located within the first main contact 11 on one of the second arcing arranged on the side of the first arcing contact 13 facing away from the contact 17 and delimited by a wall 35 arranged in the first main contact 11 .
- FIG. 4 shows the switching device 1 in a first intermediate position of the first contact arrangement 5 during its movement from the first end position into the second end position.
- a switching arc 19 burns between the arcing contacts 13 , 17 .
- the switching arc 19 heats artificial air in the arcing area 25 and in the blowout chamber 33 connected to the arcing area 25 . This increases the pressure in the arc region 25 and the blowout chamber 33 . Since the blowout chamber 33 is closed by the wall 35 , artificial air flows out of the blowout chamber 33 through the tubular first arcing contact 13 into the arcing area 25 and extinguishes the switching arc 19 .
- FIG. 5 shows the switching device 1 in a second intermediate position of the first contact arrangement 5 during its movement from the first end position into the second end position after the switching arc 19 has been extinguished.
- the flow 26 of the artificial air from the blowing chamber 33 into the arc region 25 is indicated by arrows in FIG.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280086434.0A CN118451523A (zh) | 2021-12-30 | 2022-11-25 | 具有隔离或接地功能的开关装置 |
EP22822096.8A EP4430648A1 (de) | 2021-12-30 | 2022-11-25 | Schaltvorrichtung mit trenn- oder erdungsfunktion |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021215095.0A DE102021215095A1 (de) | 2021-12-30 | 2021-12-30 | Schaltvorrichtung mit Trenn- oder Erdungsfunktion |
DE102021215095.0 | 2021-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023126110A1 true WO2023126110A1 (de) | 2023-07-06 |
Family
ID=84487477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/083238 WO2023126110A1 (de) | 2021-12-30 | 2022-11-25 | Schaltvorrichtung mit trenn- oder erdungsfunktion |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4430648A1 (de) |
CN (1) | CN118451523A (de) |
DE (1) | DE102021215095A1 (de) |
WO (1) | WO2023126110A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4264794A (en) * | 1977-03-24 | 1981-04-28 | Mitsubishi Denki Kabushiki Kaisha | Circuit interrupter including arc extinguishing fluid pressurization means and pressure accumulating means |
US4412115A (en) * | 1980-02-28 | 1983-10-25 | Mitsubishi Denki Kabushiki Kaisha | Circuit interrupter |
DE102015218003A1 (de) * | 2015-09-18 | 2017-03-23 | Siemens Aktiengesellschaft | Mittel- oder Hochspannungsschaltanlage mit einem gasdichten Isolierraum |
US20190172668A1 (en) * | 2016-07-21 | 2019-06-06 | Abb Schweiz Ag | Gas-insulated high-voltage switching device with improved main nozzle |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH667940A5 (de) | 1985-08-23 | 1988-11-15 | Bbc Brown Boveri & Cie | Elektrischer schalter. |
-
2021
- 2021-12-30 DE DE102021215095.0A patent/DE102021215095A1/de not_active Withdrawn
-
2022
- 2022-11-25 EP EP22822096.8A patent/EP4430648A1/de active Pending
- 2022-11-25 CN CN202280086434.0A patent/CN118451523A/zh active Pending
- 2022-11-25 WO PCT/EP2022/083238 patent/WO2023126110A1/de active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4264794A (en) * | 1977-03-24 | 1981-04-28 | Mitsubishi Denki Kabushiki Kaisha | Circuit interrupter including arc extinguishing fluid pressurization means and pressure accumulating means |
US4412115A (en) * | 1980-02-28 | 1983-10-25 | Mitsubishi Denki Kabushiki Kaisha | Circuit interrupter |
DE102015218003A1 (de) * | 2015-09-18 | 2017-03-23 | Siemens Aktiengesellschaft | Mittel- oder Hochspannungsschaltanlage mit einem gasdichten Isolierraum |
US20190172668A1 (en) * | 2016-07-21 | 2019-06-06 | Abb Schweiz Ag | Gas-insulated high-voltage switching device with improved main nozzle |
Also Published As
Publication number | Publication date |
---|---|
CN118451523A (zh) | 2024-08-06 |
EP4430648A1 (de) | 2024-09-18 |
DE102021215095A1 (de) | 2023-07-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3884078T2 (de) | Selbstbeblasender elektrischer Lastschalter mit rotierendem Lichtbogen. | |
DE69221080T2 (de) | Elektrischer Schalter mit zwei Vakuumschaltkapseln in Reihe | |
DE69023053T2 (de) | Gaslastschalter. | |
EP1502271B1 (de) | Unterbrechereinheit eines hochspannungs-leistungsschalters | |
WO2006066428A1 (de) | Kontaktsystem für ein elektrisches schaltgerät | |
DE19803974C1 (de) | Kontaktanordnung für einen elektrischen Leistungsschalter | |
EP3928344B1 (de) | Optimierter dreistellungsschalter | |
EP1991999B1 (de) | Elektrisches schaltgerät | |
EP1226597B1 (de) | Druckgas-leistungsschalter | |
WO2016151002A1 (de) | Isolierdüse und elektrische schalteinrichtung mit der isolierdüse | |
EP4430648A1 (de) | Schaltvorrichtung mit trenn- oder erdungsfunktion | |
EP0743665A2 (de) | Leistungsschalter | |
EP0545508B1 (de) | Metallgekapselte gasisolierte Schaltanlage mit einem Kabelanschlussgehäuse | |
DE102016124639B4 (de) | Selbstrücksetzender Strombegrenzer | |
DE19645525A1 (de) | Leistungsschalter | |
EP3948912B1 (de) | Mittelspannungs-lasttrennschalter | |
EP1187157B1 (de) | Trennschalter | |
WO2021083609A1 (de) | Vakuumschaltvorrichtung für eine schaltung mit haupt- und nebenstrompfad | |
DE102020205784A1 (de) | Schaltgerät mit Kommutierungsstrompfad | |
EP0104599B1 (de) | Hochspannungstrennschalter mit Vorkontakten | |
DE102016218322B4 (de) | Unterbrechereinheit für einen Leistungsschalter und ein Leistungsschalter mit einer derartigen Unterbrechereinheit | |
WO2019206570A1 (de) | Netzbeeinflussungsanlage | |
EP3803931B1 (de) | Gasisolierter schalter | |
DE3341903A1 (de) | Hochspannungsleistungsschalter | |
DE102006014286A1 (de) | Unterbrechereinheit mit Einschaltwiderstand |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22822096 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022822096 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2022822096 Country of ref document: EP Effective date: 20240613 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280086434.0 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |