FR2532779A1 - Auto-pneumatic gas blast HV switch - Google Patents

Auto-pneumatic gas blast HV switch Download PDF

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Publication number
FR2532779A1
FR2532779A1 FR8314095A FR8314095A FR2532779A1 FR 2532779 A1 FR2532779 A1 FR 2532779A1 FR 8314095 A FR8314095 A FR 8314095A FR 8314095 A FR8314095 A FR 8314095A FR 2532779 A1 FR2532779 A1 FR 2532779A1
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FR
France
Prior art keywords
nozzle
arc
circuit breaker
degradation
wear
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
Application number
FR8314095A
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French (fr)
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FR2532779B1 (en
Inventor
Herbert Karrenbauer
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
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Filing date
Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2532779A1 publication Critical patent/FR2532779A1/en
Application granted granted Critical
Publication of FR2532779B1 publication Critical patent/FR2532779B1/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023Switches 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

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

A hollow moving contact enters the cup shaped end of a fixed contact, the connecting zone being inside a reduced diameter part of an outer sleeve forming a fixed auxiliary contact. This reduced diameter part carries the gas blast jet which is in two sections enclosed by an upper sleeve forming an auxiliary moving contact which slides over the reduced diameter part forming an arcing gap. The gas blast jet is of insulating material, and its lower part has a hole through the middle for grinding the main moving contact, while its upper part is tubular. The lower part is of less combustible material than the upper part, and it is of an electrically higher value material than that of the auxiliary contacts. The lower part has a deep channel all round the outside, level with the arc formation zone.

Description

L'invention concerne une buse isolante de soufflage d'arc pour un interrupteur ou un disjoncteur a gaz comprime auto- pneumatique possédant des contacts de coupure en charge situés a l'intérieur de la buse, des contacts de régime situes a l'extérieur de la buse ainsi qu'une pompe conjugué a la distance de coupure et alimentant la buse en air comprimé pour souffler l'arc produit l'ouverture du disjoncteur. The invention relates to an insulating arc blowing nozzle for an auto-pneumatic compressed gas switch or circuit breaker having load break contacts located inside the nozzle, speed contacts located outside of the nozzle and a pump combined with the cut-off distance and supplying the nozzle with compressed air to blow the arc produces the opening of the circuit breaker.

tes buses isolantes pour interrupteurs de puissance ou disjoncteurs a haute tension sont habituellement faites entièrement d'un mme matériau isolant, de polytétrafluoréthylène par exemple. insulating nozzles for power switches or high voltage circuit breakers are usually made entirely of the same insulating material, for example polytetrafluoroethylene.

Bien que ce matériau possède de bonnes propriétés diélectriques et une bonne tenue a l'arc, sa résistance mécanique laisse a désirer et est souvent insuffisante pour busesisolantes. Although this material has good dielectric properties and good arc resistance, its mechanical strength leaves something to be desired and is often insufficient for busesolantes.

C'est pourquoi on a propose déja de réaliser la buse isolante d'un matériau stratifia. Selon cette proposition, l'écran et un prolongement cylindrique de la buse sont en matériau isolant et la couche de la buse dirigée vers l'arc est faite d'un matériau résistant a l'arc qui est rendue impermeable au rayonnement par imbibition d'une matière colorante. La couche dirige vers les contacts de regime, disposez du côte extérieur de la buse, est faite d'un matériau résistant b la compression et de haute stabilité electrique, ce qui peut être obtenu par une armature de fibres.Il est évident que la fabrication d'une telle buse est très coûteuse, de sorte qu'elle ne peut pas etre utilisée partout. This is why it has already been proposed to produce the insulating nozzle from a stratified material. According to this proposal, the screen and a cylindrical extension of the nozzle are made of insulating material and the layer of the nozzle directed towards the arc is made of an arc-resistant material which is made impermeable to radiation by imbibition of a coloring matter. The layer leads to the speed contacts, has the outer side of the nozzle, is made of a material resistant to compression and high electrical stability, which can be obtained by a fiber reinforcement. It is obvious that the manufacture such a nozzle is very expensive, so that it can not be used everywhere.

L'invention vise par conséquent d-apporter une buse isolante, pour un interrupteur ou un disjoncteur du type indiqué au début, qui puisse être fabriquée économiquement par des moyens techniques relativement restreints. The invention therefore aims to provide an insulating nozzle for a switch or a circuit breaker of the type indicated at the start, which can be produced economically by relatively limited technical means.

Selon l'intention, on obtient ce résultat par une buse qui est caracterisee en ce qu'elle est constituee de matériaux ayant des résistances differentes S l'usure ou a- la dégradation par l'arc et comporte un corps de base qui est dispose du cote des contacts de rugine et est forme d'un matériau dont la résistance a l'usure ou la dégradation par l'arc est inférieure a celle d'au moins une autre partie de la buse mais qui présente de hautes qualités diélectriques.  According to the intention, this is obtained by a nozzle which is characterized in that it is made of materials having different resistances to wear or to degradation by the arc and comprises a basic body which is arranged on the side of the rugine contacts and is formed from a material whose resistance to wear or degradation by the arc is less than that of at least one other part of the nozzle but which has high dielectric qualities.

La buse selon l'invention a l'avantage particulier que son corps de base, présentant par exemple une gorge annulaire externe en regard des contacts de régime, peut être fabriqué économiquement d'un matériau possedant une tenue relativement faible l'arc. La partie de buse exposée a l'are produit a la coupure et solidaire du corps de base peut ainsi avoir un volume relativement réduit, de sorte qu'elle peut être moins coûteuse qu'une buse entièrement faite du matériau coûteux dont est constituée cette partie. The nozzle according to the invention has the particular advantage that its basic body, for example having an external annular groove facing the speed contacts, can be economically manufactured from a material having a relatively low arc resistance. The nozzle part exposed to the cut area and secured to the base body can thus have a relatively small volume, so that it can be less costly than a nozzle made entirely of the expensive material of which this part is made. .

D'autres caractéristiques et avantages de l'invention ressortiront plus clairement de la description qui va suivre d'un exemple de réalisation non limitatif, ainsi que de la figure unique du dessin annexé, qui est une coupe axiale schématique de la partie d'un disjoncteur comprenant une buse isolante selon l'invention, dont la moitié gauche et la moitie droite représentent différentes positions des contacts. Other characteristics and advantages of the invention will emerge more clearly from the description which follows of a nonlimiting exemplary embodiment, as well as from the single figure of the appended drawing, which is a schematic axial section of the part of a circuit breaker comprising an insulating nozzle according to the invention, of which the left half and the right half represent different positions of the contacts.

La buse isolante 1 de l'exemple représenté est solidarisée de façon classique avec un cylindre de compression 2 qui est manoeuvré par l'intermédiaire d'une tige 3 par une commande non représentée. The insulating nozzle 1 of the example shown is joined in a conventional manner with a compression cylinder 2 which is operated by means of a rod 3 by a control not shown.

Le système de contact se compose d'un contact d'arc fixe 4 et d'un contact d'arc mobile 5 qui est solidaire du cylindre 2, ainsi que d'un contact de régime fixe 6 entourant concentriquement la buse 1 et d'un contact de régime mobile 7 coopérant avec lui. The contact system consists of a fixed arcing contact 4 and a movable arcing contact 5 which is integral with the cylinder 2, as well as a fixed speed contact 6 concentrically surrounding the nozzle 1 and a mobile speed contact 7 cooperating with it.

A l'ouverture du disjoncteur, les contacts de régime 6 et 7 se séparent en premier, comme représenté dans la moitié droite de la figure. Il sty produit un arc de commutation 8, sous l'influence duquel le courant de régime passe aux contacts d'arc 4 et 5. Dans la zone où s'établit l'arc de commutation 8, le corps de base 9 de la buse 1 présente un évidement 10, par exemple sous la forme d'une large gorge annulaire. Dans la zoe de l'arc 8 ne se trouve donc pas de matériau isolant susceptible d'être affecté par cet arc dans ses propriétés électriques et mécaniques. When the circuit breaker opens, the speed contacts 6 and 7 separate first, as shown in the right half of the figure. It sty produces a switching arc 8, under the influence of which the operating current flows to the arcing contacts 4 and 5. In the area where the switching arc 8 is established, the base body 9 of the nozzle 1 has a recess 10, for example in the form of a large annular groove. In the zoe of the arc 8 there is therefore no insulating material capable of being affected by this arc in its electrical and mechanical properties.

Le corps de base 9 avec son évidement 10 peut être fabriqué par conséquent d'un matériau ayant une tenue relativement faible a l'arc, de polyéthylène par exemple, qui est moins cortex et - en l'absence de l'action de l'arc - diélectriquement meilleur, c'est-à-dire de plus haute qualité sur le plan electrique.  The base body 9 with its recess 10 can therefore be made of a material having a relatively low resistance to arc, of polyethylene for example, which is less cortex and - in the absence of the action of the arc - dielectrically better, i.e. of higher electrical quality.

A l'intérieur du corps de base 9 est fixée, par vissage par exemple, une partie de buse 11 de forme annulaire adéquate et dBun volume relativement faible, qui est faite d'un matériau ayant des propriétés avantageuses vis-à-vis des effets de l'arc électrique, de polytétrafluoréthylène par exemple. La partie cylindrique 12 qui surmonte le corps de base 9 peut être d'un seul tenant avec ce corps et etre faite du meme matériau, mais elle peut aussi être faite d'un autre matériau, de polytétrafluoréthylène par exemple, et être reliée au corps de base, par vissage par exemple. Les parties ll et 12 sont a symétrie de révolution et sont faciles h fabriquer. Il est egalement aisé de les remplacer si nécessaire après un certain temps de service. Les joints entre le corps de base 9 et les parties ll et 12 peuvent aussi être disposés autre ment que représenté sur la figure.  Inside the base body 9 is fixed, by screwing for example, a nozzle part 11 of adequate annular shape and a relatively small volume, which is made of a material having advantageous properties with regard to the effects electric arc, polytetrafluoroethylene for example. The cylindrical part 12 which surmounts the basic body 9 can be in one piece with this body and be made of the same material, but it can also be made of another material, of polytetrafluoroethylene for example, and be connected to the body basic, by screwing for example. Parts ll and 12 are symmetrical in revolution and are easy to manufacture. It is also easy to replace them if necessary after a certain period of service. The joints between the base body 9 and the parts 11 and 12 can also be arranged other than as shown in the figure.

Claims (3)

REVENDICATIONS 1. Buse isolante de soufflage d'arc pour un interrupteur ou un disjoncteur haute tension a gaz comprimé du type autopneumatique, possédant des contacts de coupure en charge situés l'intérieur de la buse, des contacts de régime situés l'extérieur de la buse ainsi qu'une pompe conjuguée a la distance de coupure et alimentant la buse en air comprimé pour souffler l'arc produit a l'ouverture du disjoncteur, caractérisée en ce qu'elle est constituée dematér9aux ayant des résistances différentes à l'usure ou la dégradation par l'arc et comporte un corps de base (9) qui est disposé du côté des contacts de régime (6, 7) et est formé d'un matériau dont la résistance a l'usure ou la dégradation par l'arc est inferieure celle d'au moins une autre partie (11) de la buse (1), mais qui présente de hautes qualités diélectriques.1. Insulating arc blowing nozzle for a high pressure compressed gas circuit breaker or circuit breaker of the autopneumatic type, having load breaking contacts located inside the nozzle, speed contacts located outside the nozzle as well as a pump combined with the cutting distance and supplying the nozzle with compressed air to blow the arc produced at the opening of the circuit breaker, characterized in that it is made up of materials having different resistance to wear or degradation by arc and comprises a basic body (9) which is arranged on the side of the speed contacts (6, 7) and is formed from a material whose resistance to wear or degradation by arc is lower than that of at least one other part (11) of the nozzle (1), but which has high dielectric qualities. 2. Buse selon la revendication 1, caractérisée en ce quelle présente un évidement (10) dans la région des contacts de régime (6, 7).2. Nozzle according to claim 1, characterized in that it has a recess (10) in the region of the speed contacts (6, 7). 3. Buse selon la revendication 1, caractérisée en ce que le matériau ayant la plus forte résistance a l'usure ou à la dégradation par l'arc se présente sous forme d'une ou de plusieurs parties de buse (11, 12) annulaires ou cylindriques de conformation adéquate et de faible volume, qui sont reliées au corps de base (9). 3. Nozzle according to claim 1, characterized in that the material having the highest resistance to wear or to degradation by the arc is in the form of one or more annular nozzle parts (11, 12) or cylinders of adequate conformation and of small volume, which are connected to the base body (9).
FR8314095A 1982-09-04 1983-09-02 ARC BLOWING NOZZLE FOR AN AUTOPNEUMATIC COMPRESSED GAS CIRCUIT BREAKER Expired FR2532779B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823233004 DE3233004A1 (en) 1982-09-04 1982-09-04 Nozzle for an auto-pneumatic compressed-gas circuit breaker

Publications (2)

Publication Number Publication Date
FR2532779A1 true FR2532779A1 (en) 1984-03-09
FR2532779B1 FR2532779B1 (en) 1986-09-26

Family

ID=6172532

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8314095A Expired FR2532779B1 (en) 1982-09-04 1983-09-02 ARC BLOWING NOZZLE FOR AN AUTOPNEUMATIC COMPRESSED GAS CIRCUIT BREAKER

Country Status (3)

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CH (1) CH662670A5 (en)
DE (1) DE3233004A1 (en)
FR (1) FR2532779B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995033274A1 (en) * 1994-05-31 1995-12-07 Siemens Aktiengesellschaft Compressed-gas circuit breaker with a nozzle made of insulating material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1236826A (en) * 1959-04-23 1960-07-22 Siemens Ag Electric switch
GB1043353A (en) * 1962-05-11 1966-09-21 Reyrolle A & Co Ltd Improvements relating to blast nozzles for gas-blast electric circuit-breakers
EP0046174A1 (en) * 1980-08-14 1982-02-24 Licentia Patent-Verwaltungs-GmbH Compressed-gas puffer-type circuit interrupter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2924994A1 (en) * 1979-06-21 1981-01-22 Bbc Brown Boveri & Cie CIRCUIT BREAKER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1236826A (en) * 1959-04-23 1960-07-22 Siemens Ag Electric switch
GB1043353A (en) * 1962-05-11 1966-09-21 Reyrolle A & Co Ltd Improvements relating to blast nozzles for gas-blast electric circuit-breakers
EP0046174A1 (en) * 1980-08-14 1982-02-24 Licentia Patent-Verwaltungs-GmbH Compressed-gas puffer-type circuit interrupter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995033274A1 (en) * 1994-05-31 1995-12-07 Siemens Aktiengesellschaft Compressed-gas circuit breaker with a nozzle made of insulating material
US5739495A (en) * 1994-05-31 1998-04-14 Siemens Aktiengesellschaft Puffer-type circuit breaker and nozzle emitting gas with coaxial abutting plastic tube

Also Published As

Publication number Publication date
FR2532779B1 (en) 1986-09-26
DE3233004C2 (en) 1988-06-16
CH662670A5 (en) 1987-10-15
DE3233004A1 (en) 1984-03-08

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