EP0840341A2 - Disjoncteur - Google Patents

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Publication number
EP0840341A2
EP0840341A2 EP19970810751 EP97810751A EP0840341A2 EP 0840341 A2 EP0840341 A2 EP 0840341A2 EP 19970810751 EP19970810751 EP 19970810751 EP 97810751 A EP97810751 A EP 97810751A EP 0840341 A2 EP0840341 A2 EP 0840341A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
weight
percent
breaker according
filler
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.)
Withdrawn
Application number
EP19970810751
Other languages
German (de)
English (en)
Inventor
Lukas Dr. Zehnder
Kurt Dr. Kaltenegger
Lorenz Dr. Müller
Lutz Dr. Niemeyer
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.)
ABB Research Ltd Switzerland
Original Assignee
ABB Research Ltd Switzerland
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 ABB Research Ltd Switzerland filed Critical ABB Research Ltd Switzerland
Publication of EP0840341A2 publication Critical patent/EP0840341A2/fr
Withdrawn legal-status Critical Current

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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
    • H01H33/7076—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by the use of special materials
    • 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

Definitions

  • the invention is based on an electrical Circuit breaker according to the preamble of claim 1.
  • This Fluorocarbon polymers have a comparative one low mold burn-off, but on the other hand one comparatively strong local, down to the deeper Areas under the surface of the insulating nozzle Deep burn up. In particular due to the deep erosion Carbon released, which is an undesirable Sooting of the burnout channels below the surface the insulating nozzle. These pitted and as a result electrically conductive surfaces of the Burnout channels can, after the arc is extinguished, Reignitions between the two, then on different potentials of the switching pieces Circuit breaker initiate failure can lead.
  • the a corresponding filler for each fluorocarbon polymer or a pigment can be added.
  • Such admixtures prevent in particular the deep erosion and thus that Mostly sooty, but they usually have one higher burn rate and thus a larger one Form burns result, so that the life of the Insulating nozzle is greatly reduced. This means that the Insulating nozzle comparatively often in the context of time-consuming revisions of the circuit breaker replaced must become.
  • the invention as defined in claim 1 the task is based on an electrical Circuit breaker specify which one both in terms of Resistance to erosion and soot has improved insulating nozzle.
  • This circuit breaker has one with erosion-proof Contact pieces equipped contact arrangement, which a fixed contact and one along a central one Axis moving contact and one cylindrical trained, the switching pieces concentrically surrounding Insulating nozzle with a throat.
  • the isolation nozzle is made of a burn-resistant plastic. This Plastic is an oxidizing filler added, which deals with the switching off of the Circuit breaker due to thermal exposure of the nozzle material chemically generated carbon connects.
  • FEP or PFA or ETFE or similar aliphatic polymers or a mixture be provided by at least two of these plastics.
  • PA or PI can also be used as the erosion-resistant plastics or PSU or PPS or a similar aromatic polymer or a mixture of at least two of these plastics be used.
  • the fluorocarbon polymer C 2 F 4 has proven to be particularly suitable, which in itself is well suited as a nozzle material and which is admixed with 5 to 25% by weight of SiO 2 or 5 to 25% by weight of MgO or 0.1 to 25% by weight of TiO 2 or 5 to 25 percent by weight of glass fibers or a mixture of at least two of these fillers is further improved.
  • Another well-suited nozzle material is polyphenylene sulfide, that as a filler 20 to 60 percent by weight, in particular however, 40 to 50 percent by weight, glass fibers are added.
  • FIG. 1 shows a schematically illustrated partial section through the quenching chamber 1 of a circuit breaker, the quenching chamber housing is not shown, nor is the nominal current path which is generally present.
  • the extinguishing chamber 1 is filled with an insulating gas, as a rule this is SF 6 gas, which is subjected to an excess pressure in the range from 5 to 6 bar.
  • the quenching chamber 1 is cylindrical and extends along a central axis 2.
  • the quenching chamber 1 has, for example, a fixed contact piece 3 and a movable contact piece 4, which are movable relative to one another along the central axis 2.
  • the resilient, fixed contact piece 3 encloses the movable contact piece 4.
  • the movable contact piece 4 which is designed as a cylindrical contact pin, moves in the direction of an arrow 5 when it is switched off.
  • An insulating nozzle 6 firmly connected to the fixed contact piece 3 surrounds the two contact pieces 3 and 4 concentrically.
  • the movable contact piece 4 closes the constriction 7 of the insulating nozzle 6.
  • an arc burns in the area of the constriction 7 and then with the progressive switch-off movement of the movable contact piece 4 also in the region of the conically shaped one Opening of the cross-section of the insulating nozzle 6 in the direction of the downstream exhaust chamber 8 of the extinguishing chamber 1.
  • the surface 9 in the throat 7 and in the conically widening region of the opening of the insulating nozzle 6 is thermally acted upon by the arc.
  • the limits of the exhaust space 8 are not shown.
  • the insulating nozzle 6 is made of an erosion-resistant Plastic made of at least one oxidizing acting filler is added. If the insulating nozzle 6 when switched off by the arc thermally is claimed, it reacts from the Nozzle material released carbon immediately with the at the same time released oxidizing filler, for example, a gas is created, which is then from the narrowed part 7 of the insulating nozzle 6 flows out into the exhaust space 8, so that the carbon is no longer in the burnout channels the surface 9 and not on the surface 9 of the Insulating nozzle 6 can deposit.
  • a fabric made of Group of aliphatic polymers such as Polytetrafluoroethylene (PTFE) or fluoroethylene propylene (FEP) or perfluoroalkoxy (PFA) or ethylene tetrafluoroethylene (ETFE) or a similar aliphatic polymer or a Mixture of at least two of these plastics is provided.
  • PTFE Polytetrafluoroethylene
  • FEP fluoroethylene propylene
  • PFA perfluoroalkoxy
  • ETFE ethylene tetrafluoroethylene
  • a fire-resistant plastic it can also be used a substance from the group of aromatic polymers such as for example polyamide (PA) or polyimide (PI) or Polysulfone (PSU) or polyphenylene sulfide (PPS) or a similar aromatic polymer or a mixture of at least two of these plastics are provided.
  • PA polyamide
  • PSU Polysulfone
  • PPS polyphenylene sulfide
  • PTFE burn-resistant fluorocarbon polymer C 2 F 4
  • PTFE burn-resistant fluorocarbon polymer
  • the chemically effective ranges for the filler admixtures are specified here.
  • the nozzle material can be adapted to the respective special operating requirements within the framework defined by this area information.
  • the following exemplary embodiments show particularly advantageous mixtures for the production of the material for the insulating nozzle 6:
  • the fluorocarbon polymer C 2 F 4 to which 7% by weight of SiO 2 has been added, achieves a pressure build-up that is 1.08 times higher than that of the pure fluorocarbon polymer C 2 F 4 , the burnout of the nozzle ness 7 is only 0.75 times .
  • the higher pressure build-up helps with circuit breakers, which the needed for blowing the arc Generate blowing pressure yourself, advantageous blowing pressure generation.
  • the comparatively low burnout has Consequence that the stability and thus the service life the insulating nozzle 6 is advantageously improved.
  • the fluorocarbon polymer C 2 F 4 to which 7% by weight of MgO has been added, achieves a pressure build-up that is 1.17 times higher than that of the pure fluorocarbon polymer C 2 F 4 , the burnout of the nozzle 7 is only 0.71 times.
  • the higher pressure build-up helps with circuit breakers, which the needed for blowing the arc Generate blowing pressure yourself, advantageous blowing pressure generation.
  • the comparatively very low burnout has Consequence that the stability and thus the service life the insulating nozzle 6 is advantageously improved.
  • the fluorocarbon polymer C 2 F 4 to which 0.4 percent by weight of TiO 2 has been added, achieves a pressure build-up that is 1.65 times higher than that of the pure fluorocarbon polymer C 2 F 4 , but the burnout of the nozzle 7 is here 1, 07 times.
  • the particularly high pressure build-up supports Circuit breakers which are used for blowing the Generate the required blowing pressure yourself, advantageous the blowing pressure generation.
  • This is nozzle material especially for medium power auto blow switches suitable.
  • the comparatively somewhat more severe burnout in the Bottleneck 7 of the insulating nozzle 6 affects this Power range with breaking currents up to about 40 kA not noteworthy, the stability and thus the The service life of the insulating nozzle 6 therefore reaches this Performance range quite satisfactory values.
  • the fluorocarbon polymer C 2 F 4 to which 15% by weight of glass fibers have been added, achieves a pressure build-up that is 1.22 times higher than that of the pure fluorocarbon polymer C 2 F 4 , the burnout of the nozzle ness 7 here is only 0.81 times .
  • burn-resistant materials are suitable Polyphenylene sulfide
  • the filler 20 to 60 Weight percent glass fibers are added as a material for the manufacture of the isolation nozzle 6.
  • the chemically effective area for filler admixture specified.
  • the nozzle material can be inside the frame this range specification defines the respective operational requirements be adjusted.
  • the polyphenylene sulfide, the 40 percent by weight glass fibers are added, achieved compared to the pure Polyphenylene sulfide builds up pressure only 0.86 times is, the burnout of the nozzle strain 7 is only 0.77 times.
  • This erosion-resistant nozzle material also shows fully satisfactory results.
  • the specified nozzle materials allow an optimal Adaptation of the insulating nozzle 6 to the respective circuit breaker type, to the required shutdown capacities and the required intervals for the contact revisions.
  • FIG. 2 shows a diagram which, for example, shows the effects of oxidizing fillers in polytetrafluoroethylene (PTFE).
  • the temperature T in Kelvin is plotted on the abscissa, and the relative particle density R of the carbon which arises in the region of the throat 7 of the insulating nozzle 6 as a result of the action of an arc is plotted on the ordinate.
  • Curve A represents the deposition of carbon from pure C 2 F 4.
  • Curve B represents the deposition of carbon from C 2 F 4 to which MgO has been added.
  • Curve C represents the deposition of carbon from C 2 F 4 , to which SiO 2 is admixed.

Landscapes

  • Circuit Breakers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)
EP19970810751 1996-11-05 1997-10-08 Disjoncteur Withdrawn EP0840341A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996145525 DE19645525A1 (de) 1996-11-05 1996-11-05 Leistungsschalter
DE19645525 1996-11-05

Publications (1)

Publication Number Publication Date
EP0840341A2 true EP0840341A2 (fr) 1998-05-06

Family

ID=7810670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970810751 Withdrawn EP0840341A2 (fr) 1996-11-05 1997-10-08 Disjoncteur

Country Status (5)

Country Link
EP (1) EP0840341A2 (fr)
JP (1) JPH10172401A (fr)
KR (1) KR19980041883A (fr)
CN (1) CN1181604A (fr)
DE (1) DE19645525A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080123A1 (fr) * 2007-12-21 2009-07-02 Abb Research Ltd Buse faiblement conductrice pour disjoncteur à gaz et matériau à base de ptfe pour celle-ci
EP3349234A1 (fr) * 2017-01-17 2018-07-18 General Electric Technology GmbH Buse d'arc électrique et disjoncteur comportant une telle buse
CN112640022A (zh) * 2018-09-07 2021-04-09 通用电器技术有限公司 由包括液体(cf3)2cfcn微囊的材料制成的电弧爆破喷嘴和包括此类喷嘴的电路断路器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2869449B1 (fr) * 2004-04-21 2008-02-29 Areva T & D Sa Appareillage electrique de coupure en moyenne ou haute tension.
DE102005059186A1 (de) * 2005-12-02 2007-06-14 Siemens Ag Verfahren zur Behandlung von Hochspannungs-Isolierstoffelementen sowie Hochspannungs-Isolierstoffelement
CN101986405B (zh) * 2010-06-18 2012-10-03 江苏常新密封材料有限公司 一种断路器用喷口的制造方法
DE102015218003A1 (de) * 2015-09-18 2017-03-23 Siemens Aktiengesellschaft Mittel- oder Hochspannungsschaltanlage mit einem gasdichten Isolierraum
KR102054332B1 (ko) 2018-06-26 2019-12-10 엘에스산전 주식회사 배선용 차단기의 아크 소호실 베이스

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129206B (de) * 1960-02-09 1962-05-10 Merlin Gerin Leistungsschalter mit vom Lichtbogen erzeugten Loeschgasen
DE1156459B (de) * 1961-11-17 1963-10-31 Sueddeutsche Isolatorenwerke G Bei hohen Temperaturen formbestaendiger lichtbogenfester elektrischer Isolierkoerper
CH557589A (de) * 1973-04-24 1974-12-31 Bbc Brown Boveri & Cie In einer schaltkammer eines elektrischen gasschalters, insbesondere eines sf6-druckgasschalter, angeordneter bauteil aus unter der einwirkung der lichtbogenwaerme gasabgebendem werkstoff.
DE2533506A1 (de) * 1975-07-26 1977-02-10 Licentia Gmbh Der lichtbogeneinwirkung ausgesetzte duesenanordnung in einem hochspannungsschalter
NL172668C (nl) * 1977-12-02 1983-10-03 Phillips Petroleum Co Werkwijze ter bereiding van een poly(aryleensulfide)materiaal, dat bestand is tegen boogontlading.
DE2924994A1 (de) * 1979-06-21 1981-01-22 Bbc Brown Boveri & Cie Leistungsschalter
DE3642509A1 (de) * 1986-12-12 1988-06-23 Licentia Gmbh Duese fuer hochspannungsschalter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080123A1 (fr) * 2007-12-21 2009-07-02 Abb Research Ltd Buse faiblement conductrice pour disjoncteur à gaz et matériau à base de ptfe pour celle-ci
EP3349234A1 (fr) * 2017-01-17 2018-07-18 General Electric Technology GmbH Buse d'arc électrique et disjoncteur comportant une telle buse
US10236146B2 (en) 2017-01-17 2019-03-19 General Electric Technology Gmbh Electric arc-blast nozzle and a circuit breaker including such a nozzle
CN112640022A (zh) * 2018-09-07 2021-04-09 通用电器技术有限公司 由包括液体(cf3)2cfcn微囊的材料制成的电弧爆破喷嘴和包括此类喷嘴的电路断路器

Also Published As

Publication number Publication date
CN1181604A (zh) 1998-05-13
JPH10172401A (ja) 1998-06-26
DE19645525A1 (de) 1998-05-07
KR19980041883A (ko) 1998-08-17

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