EP0046174B1 - Disjoncteur autopneumatique à gaz comprimé - Google Patents

Disjoncteur autopneumatique à gaz comprimé Download PDF

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Publication number
EP0046174B1
EP0046174B1 EP19810104754 EP81104754A EP0046174B1 EP 0046174 B1 EP0046174 B1 EP 0046174B1 EP 19810104754 EP19810104754 EP 19810104754 EP 81104754 A EP81104754 A EP 81104754A EP 0046174 B1 EP0046174 B1 EP 0046174B1
Authority
EP
European Patent Office
Prior art keywords
arc
metal tube
nozzle
insulating
layer
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.)
Expired
Application number
EP19810104754
Other languages
German (de)
English (en)
Other versions
EP0046174A1 (fr
Inventor
Werner Heiss
Johann Wagner
Günter Horstmann
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0046174A1 publication Critical patent/EP0046174A1/fr
Application granted granted Critical
Publication of EP0046174B1 publication Critical patent/EP0046174B1/fr
Expired 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
    • H01H33/72—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

Definitions

  • the invention relates to an autopneumatic gas pressure switch with an insulating nozzle, from which the insulating gas compressed in a switching section pump during the switch-off for blowing a switching arc that burns between power contacts emerges, the space into which the arc gases flow is surrounded by a cylindrical metal tube in which the Insulating nozzle, which has a correspondingly configured screen, is slidably guided, the insulating nozzle having a cylindrical extension which is arranged coaxially to the metal tube, so that the space is formed by the metal tube, the extension and the screen of the insulating nozzle.
  • the known insulating nozzles for high-voltage circuit breakers consist entirely of an insulating material such as polytetrafluoroethylene. Such insulating materials with good dielectric properties and good resistance to arcing usually have a lack of mechanical strength. This mechanical strength is often not sufficient in the case of insulating nozzles of the type mentioned at the beginning. This also applies to the insulating nozzle of the above-mentioned autopneumatic gas pressure switch, which is described in EP-A-0 016 983 (Art. 54 (3), (4) EPC). This insulating nozzle has the highest possible insulating capacity with the lowest possible weight.
  • the invention is therefore based on the object of providing an autopneumatic gas pressure switch of the type mentioned at the outset with good dielectric properties and good arc resistance of the insulating nozzle, the insulating nozzle having improved mechanical strength.
  • the insulating nozzle is constructed from layered material in such a way that the layer facing the metallic tube consists of a pressure-resistant plastic of high electrical strength and low resistance to arcing and that the layer facing the power contacts is resistant to arcing.
  • the solution according to the invention enables the functions of the insulating nozzle, in particular the mechanical strength and the resistance to arcing, to be optimized in a very advantageous manner.
  • the plastic is fiber-reinforced.
  • the arc-resistant layer facing the power contacts is opaque to radiation.
  • the arc-resistant layer is made radiation-opaque by coloring.
  • the drawing shows a switch pole of an autopneumatic high-voltage gas circuit breaker.
  • a contact system is arranged within an insulator 1 in a closed switching chamber.
  • the switch has an upper plate-shaped electrical connection 2 and a lower plate-shaped electrical connection 3.
  • the power path of the switching path is formed by a fixed power contact 4, which is conductively connected to the upper plate-shaped electrical connection 2, in connection with a movable power contact 5, the arcing contact.
  • This movable power contact 5 is conductively connected to a movable cylinder 6, which cooperates with a fixed piston 7, which is attached to the lower plate-shaped electrical connection 3, as a switching path pump for generating the required blowing pressure in the event of a switch.
  • the movable cylinder 6 is connected to a fork 8, which in turn is connected to a drive rod (not shown).
  • the drive rod is actuated in the usual way by a hydraulic, pneumatic spring drive or the like.
  • An insulating nozzle 12 is fixedly connected to the movable cylinder 6 in the area of the movable power contact 5, from which the gas compressed in the switching section pump emerges when it is switched off and blows on the switching arc which is between the power contacts 4 and 5.
  • This insulating nozzle 12 has a screen 13, which is slidably guided in a fixed metal tube 16 connected to the upper plate-shaped electrical connection 2.
  • a cylindrical extension 14 made of insulating material and directed toward the fixed power contact 4 is attached to the screen 13 and is aligned coaxially with the metal tube 16.
  • This cylindrical extension 14, the length of which is matched to the length of the switching path, has at its open end a circumferential projection 15 which bears against the inner wall of the metal tube 16.
  • the transition between the metal tube 16 and the cylindrical extension 14 is expediently gas-tight.
  • a seal 15a is provided in the projection 15 for gas-tight sealing or for the gas-tight partitioning of the space 20 in which the arc cloud is located.
  • the nominal current contact path is matched to the power current path in such a way that it opens shortly before the power current path is opened, so that the arc is only in the power current path.
  • the space 20 is formed by the metal tube 16, the cylindrical extension 14 and the screen 13 of the insulating nozzle 12.
  • the metal tube 16 also has the function of the nominal current guide and is consequently provided as a nominal current contact piece with corresponding nominal current contact surfaces 16a. These nominal current contact surfaces 16a cooperate with contact surfaces 17, which have a circumferential projection on that of the iso Lierdüse 12 facing end of the movable cylinder 6 are formed and which, when switched on, bear against the nominal current contact surfaces 16a provided on the metal tube 16.
  • the insulating nozzle 12 consists of layered material.
  • the layer 13a of the screen 13 facing the fixed power contact 4 consists of an arc-resistant material which is made opaque to radiation by coloring.
  • the layer 13b facing the metal tube 16, which according to the invention can form a contact piece of a nominal current path, consists of a pressure-resistant plastic of high electrical strength.
  • the pressure-resistant plastic can be fiber-reinforced.

Landscapes

  • Circuit Breakers (AREA)

Claims (4)

1. Disjoncteur autopneumatique à gaz comprimé avec une buse isolante (12), d'où le gaz isolant comprimé pendant l'ouverture dans une pompe de distance de commutation (6, 7) s'échappe pour soufflage d'un arc établi entre des contacts de puissance (4, 5), la chambre (20) dans laquelle les gaz de l'arc pénètrent étant entourée par un tube métallique (16) cylindrique dans lequel est guidée en translation la buse isolante (12) présentant un blindage (13) de forme appropriée et un prolongement cylindrique (14) coaxial au tube métallique (16), de sorte que la chambre (20) est formée par le tube métallique (16), le prolongement (14) et le blindage (13) de la buse isolante (12), ledit disjoncteur étant caractérisé en ce que la buse isolante (12) est réalisée dans un matériau stratifié, de façon que la couche (13b) en regard du tube métallique (16) soit constituée par une matière plastique résistant à la compression et présentant une rigidité diélectrique élevée et une bonne résistance à l'arc, et que la couche (13a) en regard des contacts de puissance (4, 5) résiste à l'arc.
2. Disjoncteur autopneumatique à gaz comprimé selon la revendication 1, caractérisé en ce que la matière plastique résistant à la compression est renforcée par fibres.
3. Disjoncteur autopneumatique à gaz comprimé selon revendication 1, caractérisé en ce que la couche (13a) résistant à l'arc et située en regard des contacts de puissance (4, 5) est opaque au rayonnement.
4. Disjoncteur autopneumatique à gaz comprimé selon revendication 3, caractérisé en ce que la couche (13a) résistant à l'arc est rendue opaque au rayonnement par coloration.
EP19810104754 1980-08-14 1981-06-20 Disjoncteur autopneumatique à gaz comprimé Expired EP0046174B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3030749 1980-08-14
DE19803030749 DE3030749A1 (de) 1980-08-14 1980-08-14 Autopneumatischer druckgasschalter

Publications (2)

Publication Number Publication Date
EP0046174A1 EP0046174A1 (fr) 1982-02-24
EP0046174B1 true EP0046174B1 (fr) 1984-09-12

Family

ID=6109609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810104754 Expired EP0046174B1 (fr) 1980-08-14 1981-06-20 Disjoncteur autopneumatique à gaz comprimé

Country Status (3)

Country Link
EP (1) EP0046174B1 (fr)
JP (1) JPS57132623A (fr)
DE (1) DE3030749A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185146U (fr) * 1981-05-19 1982-11-24
DE3233004A1 (de) * 1982-09-04 1984-03-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Duese fuer einen autopneumatischen druckgasschalter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE918213C (de) * 1942-03-04 1954-09-20 Allg Elekticitaets Ges Isolierkoerper fuer Schaltkammern von Hochspannungsschaltern, insbesondere Duesenkoerper fuer Freistrahl-Druckgasschalter
DE1126473B (de) * 1959-07-09 1962-03-29 Licentia Gmbh Leistungsschalter mit einem stroemenden Loeschmittel
FR1319991A (fr) * 1962-04-20 1963-03-01 Continental Elektro Ind Ag Appareil électrique isolé
NL6501780A (fr) * 1965-02-12 1966-08-15
DE7906561U1 (de) * 1979-03-09 1983-05-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Autopneumatischer Druckgasschalter
DE2924994A1 (de) * 1979-06-21 1981-01-22 Bbc Brown Boveri & Cie Leistungsschalter

Also Published As

Publication number Publication date
EP0046174A1 (fr) 1982-02-24
DE3030749A1 (de) 1982-02-25
JPS57132623A (en) 1982-08-17

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