EP2044604A1 - Insulating nozzle, comprising a first material and a second material - Google Patents
Insulating nozzle, comprising a first material and a second materialInfo
- Publication number
- EP2044604A1 EP2044604A1 EP07787635A EP07787635A EP2044604A1 EP 2044604 A1 EP2044604 A1 EP 2044604A1 EP 07787635 A EP07787635 A EP 07787635A EP 07787635 A EP07787635 A EP 07787635A EP 2044604 A1 EP2044604 A1 EP 2044604A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- insulating
- cylindrical portion
- insulating nozzle
- hollow cylindrical
- 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.)
- Granted
Links
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
-
- 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
- H01H33/7069—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by special dielectric or insulating properties or by special electric or magnetic field control properties
Definitions
- Insulating nozzle comprising a first material and a second material
- the invention relates to an insulating material nozzle, which comprises a first material and a second material, wherein the first material has a lower erosion resistance than the second material and a Isolierstoffdüsenkanal limiting surface comprising the second material.
- Such Isolierstoffdüse is known for example from the published patent application DE 30 44 836 Al.
- There is an insulating nozzle for a gas blast circuit breaker is described in WO-the insulating largely of a elekt ⁇ driven insulating material is formed and to form a nozzle throat comprises an electrically conductive insert made of erosion-resistant material.
- the conductive insert is designed, for example, as a solid Voil- ring, which is fixed in a recess of the local insulating nozzle, so that the ring of erosion-resistant material itself forms a part of the insulating nozzle channel.
- the object is achieved with an insulating nozzle of the type mentioned above in that the Isolierstoffdüsenkanal has a hollow cylindrical portion, wherein an inner circumferential surface and an outer circumferential surface of the hollow cylindrical portion each having the second material.
- Such electrical switching devices are, for example, circuit breakers which serve to switch off operating currents and short-circuit currents.
- the short-circuit currents can be a multiple of the operating currents.
- a circuit breaker must be able to safely handle both relatively small currents and very large currents.
- arcing occurs regularly.
- Insulating nozzles surround, for example, a separating path between two rela ⁇ tively movable contact pieces, between which an occurrence of an arc is to be expected.
- an insulating nozzle channel can be used to direct arc-heated and expanded gas in certain directions.
- An expansion of larger gas volumes by the arc is quite desirable.
- the insulating material nozzle is made of a suitable first material.
- This material is usually an organic plastic such as PTFE.
- the plastic When exposed to high heat, for example by an arc, the plastic is gasified and there is additional ches switching gas.
- the use of a hollow-cylindrical section, the resulting additional switch gas can be introduced into a storage volume in ⁇ play, be one of the contact pieces are guided around and. It is advantageous to provide a coaxial structure of the switching path of the electrical switching device ⁇ .
- the erosion-resistant material should on the one hand only have a low tendency to release soot.
- carbon black should, if appropriate, generated from walls ⁇ ren materials, preferably not adhere. In Re ⁇ gelfall abbrandfestes material is verussungsarmes material.
- a further advantageous embodiment may provide that a lateral surface has an annular region of the second material.
- Ring-shaped structures are suitable to protect as large as possible in the hollow cylindrical portion of the Isolierstoffdüsenkanals there existing walls / surfaces.
- Ring structures protect zen thereby along the circumference of the correspondingly Dress ⁇ th zones of the hollow cylindrical portion of the insulating nozzle channel ⁇ . It can also be provided that a plurality of axially succession successive rings in the réellearch. Outer shell surface of the hollow cylindrical portion of the Isolierstoffdüsenkanals are arranged.
- Extinguishing gas is not overheated in such a way that the sections arranged between the rings are additionally eroded.
- the insulating material is suitable for the control of rarely occurring during the life ⁇ life of an electrical switching device short-circuit currents.
- a further advantageous embodiment can provide that regions of the inner circumferential surface and the outer lateral surface, which have the second material, overlap one another in the radial direction.
- the insulating nozzle is part of an interrupter unit of an electrical switching device and the hollow cylindrical section closes on a cylindrical portion of the Isolierstoffdüsenkanals ⁇ , wherein the cylindrical portion during a switching operation of the electrical switching device by means of a contact piece can be dammed.
- cylindrical contact piece can be moved in a simple form.
- the cylindrical contact piece may be slightly reduced in cross-section with respect to the cross section of the cylindrical portion of the Isolierstoffdüsenkanals.
- the contact piece retracts, the insulating nozzle channel is then blocked. Only in the edge regions between the contact piece and the wall of the insulating nozzle channel can lower amounts of gas escape. This makes it possible to control the flow conditions in Isolierstoffdüsenkanal.
- the second material is embedded in the first material.
- the first material with its lower erosion resistance compared to the second material is, for example, an organic plastic which has a larger volume fraction of the insulating material nozzle than the second material. It is therefore advantageous to embed the second material in the first material in such a way that at least individual sections within the hollow-cylindrical section of the insulating-material nozzle Channels are formed from the second material.
- the second material ⁇ be acted plastics can be used, for example, chemically or physically, whose carbon content was re ⁇ cuted. This can be achieved for example by radioactive radiation or thermal treatment.
- a wall of the insulating material nozzle is formed continuously from the second material.
- a further advantageous embodiment may provide that the insulating nozzle has a first nozzle body and a two ⁇ th nozzle body are arranged coaxially with each other and between which the hollow cylindrical portion is integrally ⁇ arranged.
- the two materials are electrically insulating materials.
- the first material is or ⁇ ganic plastics, in particular polytetrafluoroethylene (PTFE).
- PTFE polytetrafluoroethylene
- the second material organic plastics which have been subjected to a special treatment, are suitable, for example, plastics, which have been treated with erosion-resistant Parti ⁇ angles or plastics from the surface carbon was dissolved out ⁇ by a thermal treatment already.
- the plastics may have been altered in their Abbrandfesttechniks by special chemical processes, for example impregnating ⁇ sation.
- ceramics can be used as the second material, which have good dielectric properties and have a high erosion resistance.
- a suitable ceramic is, for example, AL 2 O 3 .
- Another object of the invention is to provide appropriate procedural ⁇ reindeer, enabling an inexpensive manufacture of the inventive insulating nozzles.
- the object is achieved in that from the second or the first material, a shaped body is formed and on the molded body, the first or second material is introduced ⁇ .
- Shaped bodies can be produced for example by sintering of granules. Moldings produced in this way can then be applied to the further material in a second step. This makes it possible to create an intimate bond between the first and the second material.
- a compound of the two materials can be produced.
- the second material being a wall of the insulating material does not completely ausbil ⁇ det, such a method can advantageously be applied.
- a further method for producing an insulating nozzle of the type mentioned in which the first and the second material are each formed into shaped bodies and the moldings are joined together.
- the moldings for the first and the second material they can be made independently.
- sintering methods , casting methods or other suitable shaping methods can be used.
- Advantage of this manufacturing method is that a completion of the insulating material can be done using different moldings. This allows the Isolierstoffdüse be made relatively flexible from different material combinations in different dimensions.
- Embodiments of the invention are shown schematically in a drawing and described in more detail below.
- Figure 1 shows a first embodiment variant of an insulating ⁇ material nozzle
- Figure 2 shows a second embodiment variant of an insulating ⁇ material nozzle.
- FIG. 1 shows a section through a separation point of a high-voltage circuit breaker.
- the separation point of the high-voltage circuit breaker has a first variant of an insulating nozzle Ia.
- the first variant of Iso ⁇ lierstoffdüse Ia is to a longitudinal axis 2a keptbil ⁇ det coaxial. Also coaxially to the longitudinal axis 2a each other frontally ⁇ opposite a first contact piece 3 and a second contact piece 4 are arranged.
- the first contact piece 3 is along the longitudinal axis 2a relative to the second contact ⁇ piece 4 movable.
- the second contact piece 4 is connected rigid angle with the first variant of the insulating material Ia.
- the second contact piece 4a has a tulip-shaped contact area, which faces the first contact piece 3.
- the first contact piece 3 is bolt-shaped and dimensioned such that it can retract into the tulip-shaped contact region of the second contact piece 4.
- the first variant of the insulating material nozzle Ia has an auxiliary nozzle 5 and a main nozzle 6.
- the auxiliary nozzle 5 is koaxi ⁇ al aligned to the second contact piece 4 and connected rigid angle with this.
- the auxiliary nozzle 5 surrounds the tulip-shaped contact region of the second contact piece 4 and encloses it.
- Auxiliary nozzle 5 with the second contact piece 4 is a storage body 7 angle rigidly connected to the second contact piece 4.
- the storage body 7 provides a storage volume for heated gas.
- the main nozzle 6 is aligned coaxially with the longitudinal axis 2a and surrounds the auxiliary nozzle 5 in large parts.
- the main nozzle 6 is fixed to the storage body 7, so that there is a connection between the auxiliary nozzle 5 and the main nozzle 6 and the first variant of the insulating material Ia is formed.
- the main nozzle 6 has a cylindrical portion 8 of a Isolierstoffdüsenkanals. The cylindrical portion 8 extends in the direction of the first contact piece 3.
- the cylindrical portion 8 has a low magnification shaped ⁇ ßerten cross-section than the cross section of the first contact piece. 3 At the second contact piece 4 facing the end of the cylindrical portion 8 of the Isolierstoffdüsenkanals the Isolierstoffdüsenkanal goes into a hollow cylindrical section, which in the through
- Storage body 7 made available storage volume opens. Due to the mutually coaxially overlapping regions of the auxiliary nozzle 5 and the main nozzle 6 of the hollow cylindrical Ab ⁇ section of Isolierstoffdüsenkanals is formed. On the outer surface of the auxiliary nozzle 5 and the inner circumferential surface of the main nozzle 6 in the overlapping region 6 inserts made of a second material are inserted into the auxiliary nozzle 5 and into the main nozzle.
- the auxiliary nozzle 5 and the main nozzle 6 are based on their volume for the most part of polytetrafluoroethylene, a first material formed.
- the inserts are formed of a second material which has an increased resistance to fire, for example by a ceramic such as AL 2 O 3 .
- the inserts are ring-shaped and overlap each other in a larger area of the hollow-cylindrical section of the insulating nozzle channel.
- first of all a shaped body is produced, either from the first or from the second mask.
- material and the corresponding sections of the insulating material nozzle, which are formed from the second or first material, are applied or introduced onto the already existing molded body. This can be done for example by two sintering processes.
- the first contact piece 3 When switched on, the first contact piece 3, which has already moved out of the cylindrical section 8 of the insulating-nozzle channel in FIG. 1, has retracted into the tulip-shaped contact region of the second contact piece 4. During a separating movement, the first contact piece 3 is moved out of the tulip-shaped contact region of the second contact piece 4. This results from a galvanic separation of the two contact pieces 3, 4 due to a high electric field strength, an arc. Even with a further removal of the first contact piece 3 of the second contact piece 4, this arc remains burning. The arc expands in the cylindrical portion 8 of the insulating nozzle channel gas. In addition, it releases switching gas from the walls of the insulating nozzle channel in this area.
- FIG 2 second variant of an insulating ⁇ material nozzle Ib has basically the same structure, as shown in Figure 1 first variant of an insulating material nozzle. The same components are therefore provided with the moving ⁇ reference symbols. Only the design of the hollow cylindrical portion 9 with a second material has been made in an alternative manner.
- FIG. 2 shows a section through a second variant of an insulating nozzle 1b.
- the second variant Ib has a main nozzle 6b and an auxiliary nozzle 5b.
- the cylindrical portion 8 the expanding portion of the nozzle channel of the main nozzle Isolierstoff- 6b and the projecting beyond the Kunststoffbe ⁇ rich region of the second contact piece of the auxiliary nozzle 5b of the first material, that is, lytetrafluorethylen from polyvinyl formed.
- the section of the main nozzle 6b, which surrounds the auxiliary nozzle 5b is coaxially formed from a two-th material, i.e., walls of this Abschnit ⁇ tes the main nozzle 6b are formed entirely from a material having a higher resistance to erosion.
- a majority of the auxiliary nozzle 5b is formed of the material with increased Ab ⁇ fire resistance.
- a forth example can provide for approval process ⁇ that rotationally symmetrical moldings are manufactured separately from materials with increased resistance to erosion and material of reduced resistance to erosion and this shaped body rigid angle to the respective end face portions to each other are connected, for example by integral joining process.
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006034742A DE102006034742A1 (en) | 2006-07-24 | 2006-07-24 | Insulating nozzle comprising a first material and a second material |
PCT/EP2007/057369 WO2008012238A1 (en) | 2006-07-24 | 2007-07-17 | Insulating nozzle, comprising a first material and a second material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2044604A1 true EP2044604A1 (en) | 2009-04-08 |
EP2044604B1 EP2044604B1 (en) | 2009-12-02 |
Family
ID=38476916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07787635A Not-in-force EP2044604B1 (en) | 2006-07-24 | 2007-07-17 | Insulating nozzle, comprising a first material and a second material |
Country Status (5)
Country | Link |
---|---|
US (1) | US8129647B2 (en) |
EP (1) | EP2044604B1 (en) |
CN (1) | CN101496123B (en) |
DE (2) | DE102006034742A1 (en) |
WO (1) | WO2008012238A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009009452A1 (en) * | 2009-02-13 | 2010-08-19 | Siemens Aktiengesellschaft | Switchgear assembly with a switching path |
EP2362407B1 (en) | 2010-02-23 | 2012-10-03 | ABB Research Ltd. | A nozzle for a breaker, and a breaker having such a nozzle |
WO2015039918A1 (en) | 2013-09-18 | 2015-03-26 | Abb Technology Ag | High-voltage circuit breaker with improved robustness |
FR3053524B1 (en) * | 2016-06-29 | 2018-08-10 | General Electric Technology Gmbh | ELECTRIC ARC BLOWING NOZZLE AND CIRCUIT BREAKER COMPRISING SUCH A NOZZLE |
JP2019075194A (en) * | 2017-10-12 | 2019-05-16 | 株式会社日立製作所 | Gas-blast circuit breaker |
KR102389730B1 (en) * | 2020-04-02 | 2022-04-22 | 엘에스일렉트릭(주) | Arc extinguishing assembly and circuit breaker having the same |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2057344A5 (en) * | 1969-08-12 | 1971-05-21 | Merlin Gerin | |
US4181837A (en) * | 1976-09-15 | 1980-01-01 | Westinghouse Electric Corp. | Compressed-gas circuit interrupter having insulated contacts |
FR2456380B1 (en) * | 1979-05-05 | 1986-02-07 | Licentia Gmbh | AUTOMATIC SWITCH WITH PNEUMATIC AND GAS PRESSURE CONTROL FOR ARC EXTINGUISHING |
DE2924994A1 (en) * | 1979-06-21 | 1981-01-22 | Bbc Brown Boveri & Cie | CIRCUIT BREAKER |
US4393291A (en) * | 1979-10-12 | 1983-07-12 | Brush Switchgear Limited | Gas blast interrupters |
CH652528A5 (en) * | 1980-10-31 | 1985-11-15 | Bbc Brown Boveri & Cie | EXHAUST GAS SWITCH. |
EP0081253A1 (en) * | 1981-12-03 | 1983-06-15 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Gas blast switch |
US4553008A (en) * | 1984-06-14 | 1985-11-12 | Cooper Industries, Inc. | Load interrupter |
DE3880190D1 (en) * | 1987-05-13 | 1993-05-19 | Bbc Brown Boveri & Cie | EXHAUST GAS SWITCH. |
CH674103A5 (en) * | 1987-05-15 | 1990-04-30 | Sprecher Energie Ag | |
DE69527950T2 (en) * | 1994-04-05 | 2003-01-02 | Abb Power T & D Co | MOVABLE GAS MIXING PLATE FOR AUTOPNEUMATIC PRESSURE GAS SWITCH |
DE19614104C2 (en) * | 1996-04-10 | 1998-05-14 | Aeg Energietechnik Gmbh | Gas pressure switch |
DE29607660U1 (en) * | 1996-04-22 | 1996-06-20 | Siemens AG, 80333 München | Circuit breaker unit of a high voltage circuit breaker |
CN1420515A (en) * | 2001-11-21 | 2003-05-28 | 株式会社日立制作所 | Buffering gas circuit breaker |
PL208184B1 (en) * | 2004-01-09 | 2011-03-31 | Wiesław Matusiak | Dismountable three-hinge vaulted hall |
JP2005332745A (en) * | 2004-05-21 | 2005-12-02 | Hitachi Ltd | Gas circuit breaker |
EP1675144A1 (en) * | 2004-12-23 | 2006-06-28 | ABB Technology AG | High voltage switch with arc resistant short circuit current conductor |
-
2006
- 2006-07-24 DE DE102006034742A patent/DE102006034742A1/en not_active Withdrawn
-
2007
- 2007-07-17 DE DE502007002214T patent/DE502007002214D1/en active Active
- 2007-07-17 EP EP07787635A patent/EP2044604B1/en not_active Not-in-force
- 2007-07-17 WO PCT/EP2007/057369 patent/WO2008012238A1/en active Application Filing
- 2007-07-17 US US12/373,653 patent/US8129647B2/en not_active Expired - Fee Related
- 2007-07-17 CN CN2007800281215A patent/CN101496123B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2008012238A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008012238A1 (en) | 2008-01-31 |
EP2044604B1 (en) | 2009-12-02 |
DE102006034742A1 (en) | 2008-01-31 |
CN101496123A (en) | 2009-07-29 |
DE502007002214D1 (en) | 2010-01-14 |
US8129647B2 (en) | 2012-03-06 |
CN101496123B (en) | 2012-12-05 |
US20090261070A1 (en) | 2009-10-22 |
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