EP0393458A1 - Blast gas medium voltage circuit breaker - Google Patents

Blast gas medium voltage circuit breaker Download PDF

Info

Publication number
EP0393458A1
EP0393458A1 EP90106749A EP90106749A EP0393458A1 EP 0393458 A1 EP0393458 A1 EP 0393458A1 EP 90106749 A EP90106749 A EP 90106749A EP 90106749 A EP90106749 A EP 90106749A EP 0393458 A1 EP0393458 A1 EP 0393458A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
piston
blowing
cylinder
breaker according
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Withdrawn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
EP90106749A
Other languages
German (de)
French (fr)
Inventor
Edmond Thuries
Michel Perret
Dennis Dufournet
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0393458A1 publication Critical patent/EP0393458A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • H01H33/88—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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • H01H33/903—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 making use of the energy of the arc or an auxiliary arc and assisting the operating mechanism

Definitions

  • the present invention relates to a medium-voltage circuit breaker in which a gas with good dielectric properties such as sulfur hexafluoride (SF6) is used both for the internal insulation of the breaking chamber, but also as a means for blowing out the arc.
  • a gas with good dielectric properties such as sulfur hexafluoride (SF6) is used both for the internal insulation of the breaking chamber, but also as a means for blowing out the arc.
  • Another object of the invention is to provide a rustic device, therefore of low cost and maintenance costs.
  • Another object of the invention is to produce a circuit breaker requiring only a low operating energy, so that the cost price of its control system is low.
  • the circuit breaker of the invention is of the type in which the increase in pressure due, upon tripping, to the appearance of an electric arc between the arcing contacts, is used to exert a motor force on the mobile equipment, thus bringing additional energy to the operating member, which therefore does not itself need to have too much power.
  • Such an arrangement is known in the field of high voltage, for example by French Patent No. 85 00610, in German patent application No. 31 32 825 and in US patent 2 957 063.
  • the increase in pressure that is born in the vicinity of the arc spreads up to a piston linked to the moving assembly and comes to help with the maneuver.
  • the gas propagates in annular conduits whose narrow section is not favorable to rapid flow; moreover, the pressure gradient between the arc zone and the face of the piston decreases very quickly so that the mechanical action of the gas is very quickly slowed down after the appearance of the arc.
  • the invention proposes to produce a circuit breaker in which the pressure is rapidly transmitted to the piston linked to the operating member and in which the flow of gas from the arc zone takes place quickly and without disturbance.
  • Another object of the invention is to produce a circuit breaker in which the arc undergoes, at the opening of the circuit breaker, a double blowing, both in the direction of movement of the moving parts and in the opposite direction.
  • the subject of the invention is a medium voltage circuit breaker with a dielectric blowing gas, comprising a cylindrical insulating envelope filled with dielectric gas under pressure, a fixed main contact, a fixed arcing contact, a fixed blowing piston and a movable element. connected to an actuator comprising a movable main contact, a movable arcing contact and a blowing cylinder associated with a blowing nozzle, characterized in that it comprises a driving piston whose cross section is at least equal to 1.3 times that of said blowing piston, said driving piston moving relative to a second cylinder.
  • the circuit breaker shown in partial view in FIG. 1, comprises an envelope 1, of insulating material such as ceramic, of generally cylindrical shape with axis xx and delimiting an interior volume Vo filled with gases with good dielectric properties, such as l 'sulfur hexafluoride (SF6), under a pressure of a few bars.
  • insulating material such as ceramic
  • Vo filled with gases with good dielectric properties, such as l 'sulfur hexafluoride (SF6), under a pressure of a few bars.
  • the circuit breaker entirely of revolution around the axis xx, comprises a fixed main contact 2 connected to a first socket not shown, and a fixed arcing contact 3, having one end 3A made of an alloy resistant to the effects of the arc, such as a tungsten alloy.
  • the mobile assembly of the circuit breaker comprises a tube 4, one end of which 4A, made of an arc-resistant alloy, constitutes the movable arcing contact.
  • the tube 4 is connected, at its other end 4B, to an operating device, not shown.
  • the tube 4 is integral with a tube 5, one of which end 5A constitutes the main mobile contact of the circuit breaker.
  • a blowing nozzle 6 of insulating material At the end 5A is fixed a blowing nozzle 6, of insulating material, the neck of which is obstructed by the arcing contact 4 when the circuit breaker is in the closed position.
  • Holes 7 are made in the crown connecting the tubes 4 and 5 so that these tubes define a single and same volume V1, closed on one side by the nozzle 6.
  • the tube 5 is guided by a first tubular part 8A of a metal part 8 having a second tubular part 8B of section much larger than that of the part 8A.
  • the part 8 is connected to a second outlet not shown.
  • the tube 5 carries a sliding electrical contact 5C cooperating with the tube 8A.
  • the volume V1 is closed, at its end situated on the right in FIG. 1, by a blowing piston 10 integral with the tube 8A; the piston 10 is provided with a unidirectional valve 10A, which lets the gas pass only from the outside to the inside of the volume V1; seals 11 and 12 seal the piston 10.
  • the tube 5 is integral with a piston 14, called the driving piston, placed inside the tube 8B and capable of sliding in this tube in leaktight manner thanks to a seal 14D.
  • the driving piston 14 defines, with the tubes 8A and 8B, and the piston 10, a volume V2.
  • the driving piston comprises a seat provided with openings 14A which can be closed by an annular valve 16, the stroke of which is limited by a projection 14B.
  • the section of the driving piston 14 is large vis-à-vis that of the blowing piston, for example the ratio of the sections is at least equal to 1.3 and is preferably between 1, 5 and 2.
  • the valve seat also has orifices of calibrated diameter 14C, the role of which will be explained below.
  • the tube 4 is pierced, on its surface, with very large openings 15, ensuring by large passages, the communication between the volume V2 and the volume V3 inside the tube 5.
  • the volume V3 is closed, on the operating member side, by a disc 17 integral with tube 4.
  • the circuit breaker works as follows:
  • the circuit breaker operating device drives the moving assembly (tubes 4 and 5, nozzle 6, piston 14) to the right of the figure.
  • the main contacts separate and the current then flows through the arcing contacts 3 and 4.
  • an arcing 20 (Figure 2) is formed; it strongly heats the surrounding gas and the pressure increases strongly.
  • the hot gas escapes through the volume V3 and the resulting pressure closes the valve 16.
  • the surface of the piston being very large, the force exerted on the latter, which helps in the opening operation, is very large. The circuit breaker does not slow down.
  • the compressed gas of volumes V1 and V3 expands on the first zero-crossing of the current, which causes the arc to extinguish, thanks to a double blowing according to the arrows F1 and F2 in FIG. 2.
  • the overpressure in the volume V2 is sufficient to close the valve 16, but this overpressure remains limited due to the large value of the volumes V1 and V3, so that the movement of the moving equipment on engagement is not braked noticeably.
  • the circuit breaker which has just been described allows the breaking of large currents at medium voltage while requiring only a low operating energy.

Landscapes

  • Circuit Breakers (AREA)

Abstract

Dielectric blast-gas medium voltage circuit breaker, comprising a cylindrical insulating surround filled with dielectric gas under pressure, a main stationary contact (2), a stationary arc contact (3), a stationary blast piston (10) and a mobile rig connected to a manoeuvring element and comprising a main moving contact (5A), a moving arc contact (4A) and a blast cylinder (5) which is associated with a blast nozzle (6), characterised in that it comprises a drive piston (14) whose cross-section is equal to at least 1.3 times that of the said blast piston (10), the said drive piston moving relative to a second cylinder (8B). <IMAGE>

Description

La présente invention concerne un disjoncteur à moyenne tension dans lequel un gaz à bonnes propriétés diélectriques tel que l'hexafluorure de soufre (SF6) est utilisé à la fois pour l'isolation intérieure de la chambre de coupure, mais également comme moyen de soufflage de l'arc.The present invention relates to a medium-voltage circuit breaker in which a gas with good dielectric properties such as sulfur hexafluoride (SF6) is used both for the internal insulation of the breaking chamber, but also as a means for blowing out the arc.

Les disjoncteurs moyenne tension (c'est-à-dire comprise entre 3 et 45 kilovolts) réalisés à ce jour sur le principe indiqué ci-dessus ne permettent pas de couper des courants supérieurs à 25 kiloampères lorsque l'énergie de manoeuvre est réduite (inférieure à 300 Joules). Or, l'accroissement des puissances mises en jeu actuellement dans les lignes à moyenne tension entraîne la nécessité de disposer d'appareils permettant la coupure de courants d'intensité plus importantes, par exemple pouvant atteindre 45 à 50 kiloampères.Medium voltage circuit breakers (that is to say between 3 and 45 kilovolts) produced to date on the principle indicated above do not make it possible to cut currents greater than 25 kiloamps when the operating energy is reduced ( less than 300 Joules). However, the increase in the powers brought into play at present in medium-voltage lines leads to the need for devices allowing the breaking of currents of greater intensity, for example up to 45 to 50 kiloamps.

C'est un but de la présente invention de réaliser un tel appareil.It is an object of the present invention to produce such an apparatus.

Un autre but de l'invention est de réaliser un appareil rustique, donc de prix de revient et de coûts d'entretien peu élevés.Another object of the invention is to provide a rustic device, therefore of low cost and maintenance costs.

Un autre but de l'invention est de réaliser un disjoncteur ne nécessitant qu'une faible énergie de manoeuvre, de sorte que le prix de revient de son système de commande soit faible.Another object of the invention is to produce a circuit breaker requiring only a low operating energy, so that the cost price of its control system is low.

Le disjoncteur de l'invention est du type dans lequel l'augmentation de pression due, au moment du déclenchement, à l'apparition d'un arc électrique entre les contacts d'arc, est mise à profit pour exercer un effort moteur sur l'équipage mobile, venant ainsi apporter un énergie supplémentaire à l'organe de manoeuvre, qui dès lors n'a pas besoin lui-même d'avoir une puissance trop importante. Une telle disposition est connue, dans le domaine de la haute tension, par exemple par le brevet français No 85 00610, dans la demande de brevet allemand No 31 32 825 et dans le brevet américain 2 957 063. Dans ce type de disjoncteur, l'augmentation de pression qui naît au voisinage de l'arc se propage jusqu'à un piston lié à l'équipage mobile et vient apporter une aide à la manoeuvre.The circuit breaker of the invention is of the type in which the increase in pressure due, upon tripping, to the appearance of an electric arc between the arcing contacts, is used to exert a motor force on the mobile equipment, thus bringing additional energy to the operating member, which therefore does not itself need to have too much power. Such an arrangement is known in the field of high voltage, for example by French Patent No. 85 00610, in German patent application No. 31 32 825 and in US patent 2 957 063. In this type of circuit breaker, the increase in pressure that is born in the vicinity of the arc spreads up to a piston linked to the moving assembly and comes to help with the maneuver.

La facilité et la rapidité avec lesquelles se propage la pression dépendent d'une part des obstacles mis au passage du gaz entre la zone d'arc et le piston, et, d'autre part, à l'évolution du gradient de pression entre la zone d'arc et la face du piston.The ease and rapidity with which the pressure propagates depends on the one hand on the obstacles placed in the passage of the gas between the arc zone and the piston, and, on the other hand, on the evolution of the pressure gradient between the arc area and the face of the piston.

Dans les dispositifs décrits dans les documents précités, le gaz se propage dans des conduits annulaires dont la section étroite n'est pas favorable à un écoulement rapide; par ailleurs, le gradient de pression entre la zone d'arc et la face du piston diminue très vite de sorte que l'action mécanique du gaz est très vite ralentie après l'apparition de l'arc.In the devices described in the aforementioned documents, the gas propagates in annular conduits whose narrow section is not favorable to rapid flow; moreover, the pressure gradient between the arc zone and the face of the piston decreases very quickly so that the mechanical action of the gas is very quickly slowed down after the appearance of the arc.

Pour pallier ces inconvénients, l'invention se propose de réaliser un disjoncteur dans lequel la pression est rapidement transmise au piston lié à l'organe de manoeuvre et dans lequel l'écoulement du gaz depuis la zone d'arc s'effectue rapidement et sans perturbation.To overcome these drawbacks, the invention proposes to produce a circuit breaker in which the pressure is rapidly transmitted to the piston linked to the operating member and in which the flow of gas from the arc zone takes place quickly and without disturbance.

Un autre but de l'invention est de réaliser un disjoncteur dans lequel l'arc subit, à l'ouverture du disjoncteur, un double soufflage, à la fois dans la direction du mouvement des pièces mobiles et dans la direction opposée.Another object of the invention is to produce a circuit breaker in which the arc undergoes, at the opening of the circuit breaker, a double blowing, both in the direction of movement of the moving parts and in the opposite direction.

L'invention a pour objet un disjoncteur à moyenne tension à gaz diélectrique de soufflage, comprenant une enveloppe isolante cylindrique remplie de gaz diélectrique sous pression, un contact principal fixe, un contact d'arc fixe, un piston de soufflage fixe et un équipage mobile relié à un organe de manoeuvre comprenant un contact principal mobile, un contact d'arc mobile et un cylindre de soufflage associé à une buse de soufflage, caractérisé en ce quil comprend un piston moteur dont la section est au moins égale à 1,3 fois celle dudit piston de soufflage, ledit piston moteur se déplaçant par rapport à un second cylindre.The subject of the invention is a medium voltage circuit breaker with a dielectric blowing gas, comprising a cylindrical insulating envelope filled with dielectric gas under pressure, a fixed main contact, a fixed arcing contact, a fixed blowing piston and a movable element. connected to an actuator comprising a movable main contact, a movable arcing contact and a blowing cylinder associated with a blowing nozzle, characterized in that it comprises a driving piston whose cross section is at least equal to 1.3 times that of said blowing piston, said driving piston moving relative to a second cylinder.

D'autres particularités de l'invention apparaîtront à la lumière de la description donnée ci-après d'un mode préféré de réalisation, en référence au dessin annexé dans lequel:

  • - la figure 1 est une vue partielle en demi-coupe axiale d'un disjoncteur selon l'invention, représenté en position enclenchée,
  • - la figure 2 est une vue partielle en demi-coupe axiale du même disjoncteur, représenté au cours d'une manoeuvre de déclenchement (ouverture).
Other features of the invention will become apparent in the light of the description given below of a preferred embodiment, with reference to the appended drawing in which:
  • FIG. 1 is a partial view in axial half-section of a circuit breaker according to the invention, shown in the engaged position,
  • - Figure 2 is a partial view in axial half-section of the same circuit breaker, shown during a tripping operation (opening).

Le disjoncteur, représenté en vue partielle dans la figure 1, comporte un enveloppe 1, en matériau isolant tel que la céramique, de forme générale cylindrique d'axe xx et délimitant un volume intérieur Vo rempli de gaz à bonnes propriétés diélectriques, tel que l'hexafluorure de soufre (SF6), sous une pression de quelques bars.The circuit breaker, shown in partial view in FIG. 1, comprises an envelope 1, of insulating material such as ceramic, of generally cylindrical shape with axis xx and delimiting an interior volume Vo filled with gases with good dielectric properties, such as l 'sulfur hexafluoride (SF6), under a pressure of a few bars.

Le disjoncteur, entièrement de révolution autour de l'axe xx, comprend un contact principal fixe 2 relié à une première prise de courant non représentée, et un contact d'arc fixe 3, ayant une extrémité 3A réalisée en un alliage résistant aux effets de l'arc, tel qu'un alliage de tungstène.The circuit breaker, entirely of revolution around the axis xx, comprises a fixed main contact 2 connected to a first socket not shown, and a fixed arcing contact 3, having one end 3A made of an alloy resistant to the effects of the arc, such as a tungsten alloy.

L'équipage mobile du disjoncteur comprend un tube 4, dont une extrémité 4A, en alliage résistant à l'arc, constitue le contact d'arc mobile. Le tube 4 est relié, à son autre extrémité 4B, à un dispositif de manoeuvre non représenté. Le tube 4 est solidaire d'un tube 5 dont une extrémité 5A constitue le contact principal mobile du disjoncteur.The mobile assembly of the circuit breaker comprises a tube 4, one end of which 4A, made of an arc-resistant alloy, constitutes the movable arcing contact. The tube 4 is connected, at its other end 4B, to an operating device, not shown. The tube 4 is integral with a tube 5, one of which end 5A constitutes the main mobile contact of the circuit breaker.

A l'extrémité 5A est fixée une buse de soufflage 6, en matériau isolant, dont le col est obstrué par le contact d'arc 4 lorsque le disjoncteur est en position fermée.At the end 5A is fixed a blowing nozzle 6, of insulating material, the neck of which is obstructed by the arcing contact 4 when the circuit breaker is in the closed position.

Des trous 7 sont pratiqués dans la couronne reliant les tubes 4 et 5 de telle sorte que ces tubes définissent un seul et même volume V1, fermé d'un côté par la buse 6.Holes 7 are made in the crown connecting the tubes 4 and 5 so that these tubes define a single and same volume V1, closed on one side by the nozzle 6.

Le tube 5 est guidé par une première partie tubulaire 8A d'une pièce métallique 8 ayant une seconde partie tubulaire 8B de section bien supérieure à celle de la partie 8A.The tube 5 is guided by a first tubular part 8A of a metal part 8 having a second tubular part 8B of section much larger than that of the part 8A.

La pièce 8 est reliée à une seconde prise de courant non représentée.The part 8 is connected to a second outlet not shown.

Le tube 5 porte un contact électrique glissant 5C coopérant avec le tube 8A.The tube 5 carries a sliding electrical contact 5C cooperating with the tube 8A.

Le volume V1 est fermé, à son extrémité située à droite dans la figure 1, par un piston de soufflage 10 solidaire du tube 8A; le piston 10 est muni d'un clapet 10A unidirectionnel, qui ne laisse passer le gaz que de l'extérieur vers l'intérieur du volume V1; des joints 11 et 12 assurent l'étanchéité du piston 10.The volume V1 is closed, at its end situated on the right in FIG. 1, by a blowing piston 10 integral with the tube 8A; the piston 10 is provided with a unidirectional valve 10A, which lets the gas pass only from the outside to the inside of the volume V1; seals 11 and 12 seal the piston 10.

En position enclenchée du disjoncteur, (figure 1), le courant circule par les pièces 2, 5 et 8.In the circuit-breaker on position (Figure 1), the current flows through parts 2, 5 and 8.

Le tube 5 est solidaire d'un piston 14, dit piston moteur, placé à l'intérieur du tube 8B et pouvant coulisser dans ce tube de manière étanche grâce à un joint 14D. Le piston moteur 14 délimite, avec les tubes 8A et 8B,et le piston 10, un volume V2. Le piston moteur comprend un siège muni d'ouvertures 14A pouvant être fermées par un clapet annulaire 16, dont la course est limitée par un ressaut 14B.The tube 5 is integral with a piston 14, called the driving piston, placed inside the tube 8B and capable of sliding in this tube in leaktight manner thanks to a seal 14D. The driving piston 14 defines, with the tubes 8A and 8B, and the piston 10, a volume V2. The driving piston comprises a seat provided with openings 14A which can be closed by an annular valve 16, the stroke of which is limited by a projection 14B.

Selon une caractéristique de l'invention, la section du piston moteur 14 est grande vis-à-vis de celle du piston de soufflage, par exemple le rapport des sections est au moins égal à 1,3 et est de préférence compris entre 1,5 et 2.According to a characteristic of the invention, the section of the driving piston 14 is large vis-à-vis that of the blowing piston, for example the ratio of the sections is at least equal to 1.3 and is preferably between 1, 5 and 2.

Le siège du clapet possède également des orifices de diamètre calibré 14C dont le rôle sera expliqué plus loin.The valve seat also has orifices of calibrated diameter 14C, the role of which will be explained below.

Le tube 4 est percé, à sa surface, de très larges ouvertures 15, assurant par de vastes passages, la communication entre le volume V2 et le volume V3 intérieur au tube 5. Le volume V3 est fermé, côté organe de manoeuvre, par un disque 17 solidaire du tube 4.The tube 4 is pierced, on its surface, with very large openings 15, ensuring by large passages, the communication between the volume V2 and the volume V3 inside the tube 5. The volume V3 is closed, on the operating member side, by a disc 17 integral with tube 4.

Le fonctionnement du disjoncteur est le suivant:The circuit breaker works as follows:

1) Coupure des courants de forte intensité1) Cut of high intensity currents

Il s'agit des courants de court-circuit.These are short-circuit currents.

A la détection du court-circuit, le dispositif de manoeuvre du disjoncteur entraîne l'équipage mobile (tubes 4 et 5, buse 6, piston 14) vers la droite de la figure.Upon detection of the short circuit, the circuit breaker operating device drives the moving assembly (tubes 4 and 5, nozzle 6, piston 14) to the right of the figure.

Les contacts principaux se séparent et le courant traverse alors les contacts d'arc 3 et 4.The main contacts separate and the current then flows through the arcing contacts 3 and 4.

A la séparation des contacts d'arc, un arc 20 (figure 2) se forme; il échauffe fortement le gaz environnant et la pression croît fortement. Le gaz chaud s'échappe par le volume V3 et la pression résultante vient fermer le clapet 16. La surface du piston étant très grande, la force exercée sur ce dernier, qui aide à la manoeuvre d'ouverture, est très grande. Le disjoncteur ne ralentit pas.Upon separation of the arcing contacts, an arcing 20 (Figure 2) is formed; it strongly heats the surrounding gas and the pressure increases strongly. The hot gas escapes through the volume V3 and the resulting pressure closes the valve 16. The surface of the piston being very large, the force exerted on the latter, which helps in the opening operation, is very large. The circuit breaker does not slow down.

L'écoulement du gaz chaud provenant de la zone d'arc est facilité:

  • a) par les grandes ouvertures 15 qui réduisent à néant les pertes de charges,
  • b) par les orifices calibrés 14C qui limitent la valeur de la pression dans le volume V2, assurant ainsi une chute de pression entre la zone d'arc et la zone du piston 14.
The flow of hot gas from the arc zone is facilitated:
  • a) by the large openings 15 which reduce the pressure losses to zero,
  • b) by the calibrated orifices 14C which limit the value of the pressure in the volume V2, thus ensuring a pressure drop between the arc zone and the piston zone 14.

Le gaz comprimé des volumes V1 et V3 se détend au premier passage par zero du courant, ce qui entraîne l'extinction de l'arc, grâce à un double soufflage selon les flèches F1 et F2 de la figure 2.The compressed gas of volumes V1 and V3 expands on the first zero-crossing of the current, which causes the arc to extinguish, thanks to a double blowing according to the arrows F1 and F2 in FIG. 2.

2) Coupure des courants de faible intensité2) Cutting of low intensity currents

Il s'agit par exemple du courant nominal, ou des courants capacitifs ou faiblement inductifs.These are for example the nominal current, or capacitive or weakly inductive currents.

A la séparation des contacts d'arc, l'augmentation de pression due à l'arc est insuffisante pour plaquer le clapet 16 contre son siège. Celui-ci reste ouvert, ce qui évite, dans le volume V2, toute dépression qui viendrait freiner l'équipage mobile.
Le courant s'éteint au premier passage par zéro, par le soufflage produit par le gaz du volume V1 entre les contacts d'arc.When the arcing contacts are separated, the pressure increase due to the arcing is insufficient to press the valve 16 against its seat. This remains open, which avoids, in volume V2, any depression which would brake the moving equipment.
The current turns off at the first zero crossing, by the blowing produced by the gas of volume V1 between the arcing contacts.

3) Fermeture du disjoncteur3) Closing the circuit breaker

La surpression dans le volume V2 est suffisante pour fermer le clapet 16, mais cette surpression reste limitée en raison de la grande valeur des volumes V1 et V3, de sorte que le mouvement de l'équipage mobile à l'enclenchement n'est pas freiné de manière notable.The overpressure in the volume V2 is sufficient to close the valve 16, but this overpressure remains limited due to the large value of the volumes V1 and V3, so that the movement of the moving equipment on engagement is not braked noticeably.

Le disjoncteur qui vient d'être décrit permet la coupure d'importants courants à moyenne tension tout en ne nécessitant qu'une faible énergie de manoeuvre.The circuit breaker which has just been described allows the breaking of large currents at medium voltage while requiring only a low operating energy.

Claims (7)

1) Disjoncteur à moyenne tension gaz diélectrique de soufflage, comprenant une enveloppe isolante cylindrique remplie de gaz diélectrique sous pression, un contact principal fixe (2), un contact d'arc fixe (3), un piston de soufflage fixe (10) et un équipage mobile relié à un organe de manoeuvre et comprenant un contact principal mobile (5A), un contact d'arc mobile (4A) et un cylindre de soufflage (5) associé à une buse de soufflage (6), caractérisé en ce quil comprend un piston moteur (14) dont la section est au moins égale à 1,3 fois celle dudit piston de soufflage (10), ledit piston moteur se déplaçant par rapport à un second cylindre (8B).1) Medium-voltage blow-out dielectric gas circuit breaker, comprising a cylindrical insulating jacket filled with pressurized dielectric gas, a fixed main contact (2), a fixed arcing contact (3), a fixed blow-out piston (10) and a movable assembly connected to an operating member and comprising a movable main contact (5A), a movable arcing contact (4A) and a blowing cylinder (5) associated with a blowing nozzle (6), characterized in that it comprises a driving piston (14), the cross section of which is at least equal to 1.3 times that of said blowing piston (10), said driving piston moving relative to a second cylinder (8B). 2) Disjoncteur selon la revendication 1, caractérisé en ce que ledit piston moteur (14) est muni d'ouvertures (14A) obturables par un clapet (16) disposé du coté du piston donnant sur le cylindre de soufflage.2) A circuit breaker according to claim 1, characterized in that said driving piston (14) is provided with openings (14A) closable by a valve (16) disposed on the side of the piston overlooking the blowing cylinder. 3) Disjoncteur selon l'une des revendications 1 et 2, caractérisé en ce que ledit piston moteur (14) est percé par des orifices calibrés (14D).3) Circuit breaker according to one of claims 1 and 2, characterized in that said driving piston (14) is pierced by calibrated orifices (14D). 4) Disjoncteur selon l'une des revendications 1 à 3 caractérisé en ce que ledit cylindre de soufflage comprend une partie (5A) solidaire de l'équipage mobile et portant ladite buse de soufflage et coopérant avec une seconde partie fixe (8A), coulissant dans ladite première partie, en contact électrique avec cette dernière par des contacts glissants (5C), ladite seconde partie (8A) portant ledit piston de soufflage (10) qui est muni d'un clapet unidirectionnel n'autorisant le passage du gaz que dans le sens allant de l'extérieur vers l'intérieur dudit cylindre de soufflage.4) Circuit breaker according to one of claims 1 to 3 characterized in that said blowing cylinder comprises a part (5A) integral with the movable assembly and carrying said blowing nozzle and cooperating with a second fixed part (8A), sliding in said first part, in electrical contact with the latter by sliding contacts (5C), said second part (8A) carrying said blowing piston (10) which is provided with a one-way valve allowing the passage of gas only in the direction going from the outside towards the inside of said blowing cylinder. 5) Disjoncteur selon la revendication 4, caractérisé en ce que ledit cylindre de soufflage (5) a une section annulaire et est délimité intérieurement par un tube métallique (4) qui lui est coaxial et dont une première extrémité (4A) constitue le contact d'arc mobile et dont une seconde extrémité (4B) est reliée à l'organe de manoeuvre du disjoncteur.5) Circuit breaker according to claim 4, characterized in that said blowing cylinder (5) has an annular section and is delimited internally by a tube metal (4) which is coaxial with it and a first end (4A) of which constitutes the movable arcing contact and a second end (4B) of which is connected to the operating member of the circuit breaker. 6) Disjoncteur selon la revendication 5, caractérisé en ce que ledit tube métallique est muni de perçages (15) de grandes dimensions faisant communiquer la zone d'arc avec ledit second cylindre (8B) par rapport auquel se déplace ledit piston (14).6) A circuit breaker according to claim 5, characterized in that said metal tube is provided with holes (15) of large dimensions communicating the arc zone with said second cylinder (8B) relative to which moves said piston (14). 7) Disjoncteur selon l'une des revendications 1 à 6, caractérisé en ce que ledit piston moteur (10) comprend un clapet (16) associé à un siège (14) percés d'orifices (14C) de diamètre calibré.7) Circuit breaker according to one of claims 1 to 6, characterized in that said driving piston (10) comprises a valve (16) associated with a seat (14) pierced with orifices (14C) of calibrated diameter.
EP90106749A 1989-04-17 1990-04-09 Blast gas medium voltage circuit breaker Withdrawn EP0393458A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905050A FR2646013B1 (en) 1989-04-17 1989-04-17 MEDIUM VOLTAGE CIRCUIT BREAKER
FR8905050 1989-04-17

Publications (1)

Publication Number Publication Date
EP0393458A1 true EP0393458A1 (en) 1990-10-24

Family

ID=9380795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106749A Withdrawn EP0393458A1 (en) 1989-04-17 1990-04-09 Blast gas medium voltage circuit breaker

Country Status (5)

Country Link
US (1) US4992634A (en)
EP (1) EP0393458A1 (en)
JP (1) JP2657108B2 (en)
CA (1) CA2014512C (en)
FR (1) FR2646013B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2729788A1 (en) * 1995-01-20 1996-07-26 Gec Alsthom T & D Sa High-tension contact breaker with gas blower

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2089590T3 (en) * 1992-02-06 1996-10-01 Gec Alsthom T & D Ag PRESSURE GAS SWITCH.
DE4211159A1 (en) * 1992-03-31 1993-10-07 Siemens Ag Electrical high-voltage circuit breaker
JPH06310000A (en) * 1993-04-20 1994-11-04 Hitachi Ltd Grounding switch
JP4174094B2 (en) * 1998-01-29 2008-10-29 株式会社東芝 Gas circuit breaker
EP1675145A1 (en) * 2004-12-23 2006-06-28 ABB Technology AG High power circuit breaker with sealing against hot arcing gasses
FR2922043B1 (en) * 2007-10-03 2009-12-11 Areva T & D Sa BREAKER BREAKER CHAMBER WITH DOUBLE VOLUME OF COMPRESSION
DE112013001981T5 (en) * 2012-04-11 2015-03-12 Abb Technology Ag breakers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957063A (en) * 1958-03-07 1960-10-18 Westinghouse Electric Corp Pumped-gas circuit interrupter
DE3132825A1 (en) * 1981-06-18 1983-01-13 Sprecher & Schuh AG, 5001 Aarau, Aargau Gas-blast circuit breaker
FR2576142A1 (en) * 1985-01-16 1986-07-18 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER, COMPRESSED GAS, HANDLING ENERGY ASSISTED BY THE ARC THERMAL EFFECT

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419054B2 (en) * 1973-11-07 1979-07-12
CH600538A5 (en) * 1976-04-22 1978-06-15 Bbc Brown Boveri & Cie
JPS5372176A (en) * 1976-12-10 1978-06-27 Hitachi Ltd Buffer type gas breaker
FR2576144B1 (en) * 1985-01-16 1987-02-06 Alsthom Atlantique HIGH VOLTAGE, COMPRESSED GAS, LOW-ENERGY CIRCUIT BREAKER
JP2528100B2 (en) * 1986-07-08 1996-08-28 株式会社日立製作所 Patch type gas circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957063A (en) * 1958-03-07 1960-10-18 Westinghouse Electric Corp Pumped-gas circuit interrupter
DE3132825A1 (en) * 1981-06-18 1983-01-13 Sprecher & Schuh AG, 5001 Aarau, Aargau Gas-blast circuit breaker
FR2576142A1 (en) * 1985-01-16 1986-07-18 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER, COMPRESSED GAS, HANDLING ENERGY ASSISTED BY THE ARC THERMAL EFFECT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2729788A1 (en) * 1995-01-20 1996-07-26 Gec Alsthom T & D Sa High-tension contact breaker with gas blower

Also Published As

Publication number Publication date
CA2014512A1 (en) 1990-10-17
JPH02288120A (en) 1990-11-28
US4992634A (en) 1991-02-12
FR2646013A1 (en) 1990-10-19
CA2014512C (en) 1993-11-16
FR2646013B1 (en) 1996-02-23
JP2657108B2 (en) 1997-09-24

Similar Documents

Publication Publication Date Title
EP0315505A1 (en) Electrical self blast circuit breaker with variable extinguishing chamber volume
EP0380907B2 (en) High and medium voltage gas blast circuit breaker
EP0591039B1 (en) H.T. self-blast circuit breaker having an arc chamber with reduced gas compression
CA2014512C (en) Medium voltage gas blast circuit breaker
FR2576142A1 (en) HIGH VOLTAGE CIRCUIT BREAKER, COMPRESSED GAS, HANDLING ENERGY ASSISTED BY THE ARC THERMAL EFFECT
EP0441292B1 (en) Medium high voltage self-blowing circuit breaker
FR2576144A1 (en) HIGH VOLTAGE, COMPRESSED GAS, LOW-ENERGY CIRCUIT BREAKER
EP0334181B1 (en) High-tension switch with a reduced driving energy
EP0398211B1 (en) High tension gas blast circuit breaker
EP0415098B1 (en) Self-blast circuit breaker for medium voltage
EP0667633A1 (en) Autopneumatic circuit breaker with pneumatically locked semi-mobile piston
CA2017127C (en) High current rating medium voltage circuit-breaker
EP0406794B1 (en) High or middle tension circuit breaker
CA2041234C (en) Series arc high voltage breaker
EP0400523B1 (en) High tension gas blast circuit-breaker
EP0664552A1 (en) Puffer-type gas-blast circuit breaker with double movement
CA2043025C (en) Medium voltage circuit breaker
FR2535518A1 (en) CUTTING CHAMBER FOR GAS CIRCUIT BREAKER
CH688702A5 (en) High-voltage switch having an arc extinguishing chamber variable blast volume.
FR2705494A1 (en) Circuit breaker with operation assisted by electrodynamic means
EP0398116B1 (en) Medium high voltage self-blowing circuit breaker
FR2729788A1 (en) High-tension contact breaker with gas blower
FR2646961A1 (en) Self-blasting medium voltage circuit breaker.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19901227

17Q First examination report despatched

Effective date: 19930319

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930730