CH681751A5 - High voltage circuit breaker - Google Patents
High voltage circuit breaker Download PDFInfo
- Publication number
- CH681751A5 CH681751A5 CH413989A CH413989A CH681751A5 CH 681751 A5 CH681751 A5 CH 681751A5 CH 413989 A CH413989 A CH 413989A CH 413989 A CH413989 A CH 413989A CH 681751 A5 CH681751 A5 CH 681751A5
- Authority
- CH
- Switzerland
- Prior art keywords
- tube
- contact
- movable
- circuit breaker
- fixed
- Prior art date
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
- H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
-
- 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
- H01H33/91—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 the arc-extinguishing fluid being air or gas
-
- 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
- H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
- H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
1 1
CH 681 751 A5 CH 681 751 A5
2 2
Description Description
Dans la demande de brevet français No 2 629 260 A1, la demanderesse a décrit un disjoncteur à haute tension à gaz diélectrique sous pression, du type comprenant au moins une chambre de coupure comportant une enveloppe isolante remplie dudit gaz à l'intérieur de laquelle sont placés un ensemble comportant un contact principal fixe et un contact d'arc fixe, un ensemble mobile comportant notamment un contact principal mobile et un contact d'arc mobile, la chambre de coupure comportant en outre un cylindre de soufflage débouchant dans une buse de soufflage et une paire de contacts secondaires caractérisé en ce qu'il comprend des moyens pour assurer une pression basse dans ledit cylindre de soufflage lors de l'ouverture du disjoncteur parcouru par un faible courant. In French patent application No 2 629 260 A1, the applicant has described a high-voltage circuit breaker with pressurized dielectric gas, of the type comprising at least one breaking chamber comprising an insulating envelope filled with said gas inside which are placed an assembly comprising a fixed main contact and a fixed arcing contact, a movable assembly comprising in particular a movable main contact and a movable arcing contact, the interrupting chamber further comprising a blowing cylinder opening into a blowing nozzle and a pair of secondary contacts characterized in that it comprises means for ensuring a low pressure in said blowing cylinder during the opening of the circuit breaker traversed by a low current.
La fig. 1 annexée au présent mémoire est la reproduction de la fig. 1 dudit brevet. Fig. 1 appended to this memo is the reproduction of FIG. 1 of said patent.
Selon un mode préféré de réalisation, décrit dans ledit brevet, ledit cylindre 20, de soufflage est délimité par un premier tube 5 constituant le contact d'arc mobile, un second tube 7 constituant le contact principal mobile et un piston fixe 14, lesdits moyens étant constitués par des orifices 16 pratiqués à travers ledit piston et mettant en communication l'intérieur du cylindre de soufflage avec l'extérieur de ce cylindre, lesdits orifices étant obtura-bles par un piston 22 de fermeture s'appliquant sur lesdits orifices sous l'action d'un ressort lié à l'ensemble fixe. According to a preferred embodiment, described in said patent, said blowing cylinder 20 is delimited by a first tube 5 constituting the movable arcing contact, a second tube 7 constituting the movable main contact and a fixed piston 14, said means being constituted by orifices 16 formed through said piston and placing in communication the interior of the blowing cylinder with the exterior of this cylinder, said orifices being closable by a closing piston 22 applying to said orifices under the action of a spring linked to the fixed assembly.
Avantageusement, comme indiqué audit brevet, le tube 5 constituant le contact d'arc mobile et un tube 15 lié à l'ensemble fixe et concentrique au tube précité délimitent, de l'autre côté du piston 14 fermant le cylindre de soufflage, un volume 35 variable fermé d'un côté par ledit piston de fermeture 22 et de l'autre par un piston annulaire d'extrémité 42, lié au tube 5 constituant le contact d'arc mobile et glissant le long dudit tube 15 lié à l'ensemble fixe, lesdit volume enfermant lesdits contacts secondaires, un premier contact secondaire 30 étant solidaire dudit tube 15 lié à l'ensemble fixe, le second contact secondaire 31 étant entraîné par le tube 5 constituant le contact d'arc mobile. Advantageously, as indicated in said patent, the tube 5 constituting the movable arcing contact and a tube 15 linked to the fixed assembly and concentric with the aforementioned tube delimit, on the other side of the piston 14 closing the blowing cylinder, a volume 35 variable closed on one side by said closing piston 22 and on the other by an annular end piston 42, linked to tube 5 constituting the movable arcing contact and sliding along said tube 15 linked to the assembly fixed, said volume enclosing said secondary contacts, a first secondary contact 30 being integral with said tube 15 linked to the fixed assembly, the second secondary contact 31 being driven by the tube 5 constituting the movable arcing contact.
Le but de la présente invention est de doter le disjoncteur du brevet principal d'un moyen pour allonger l'arc secondaire ce qui a pour effet d'une part de réchauffer plus rapidement le volume thermique et de recueillir davantage d'énergie motrice et d'autre part de réduire l'usure des contacts secondaires. The object of the present invention is to provide the circuit breaker of the main patent with a means for lengthening the secondary arc, which has the effect, on the one hand, of heating the thermal volume more quickly and of collecting more motive energy and d on the other hand to reduce the wear of the secondary contacts.
Un but accessoire de l'invention est de doter le disjoncteur de la demande de brevet No FR 2 629 260 Al d'un moyen pour canaliser l'arc secondaire de manière à favoriser son extinction ultérieure. An accessory object of the invention is to provide the circuit breaker of patent application No. FR 2 629 260 A1 with a means for channeling the secondary arc so as to promote its subsequent extinction.
Selon l'invention, le premier but est atteint en entourant l'un des contacts secondaires par une bobine parcourue par le courant de l'arc secondaire. According to the invention, the first object is achieved by surrounding one of the secondary contacts with a coil traversed by the current of the secondary arc.
Selon l'invention le but accessoire est atteint dans une forme d'exécution préférée en chemisant ledit volume entourant lesdits contacts secondaires au moyen de tubes isolants. According to the invention, the accessory object is achieved in a preferred embodiment by lining said volume surrounding said secondary contacts by means of insulating tubes.
L'invention sera bien comprise par la description donnée ci-après d'un mode préféré de réalisation de l'invention en référence au dessin annexé dans lequel: The invention will be better understood from the description given below of a preferred embodiment of the invention with reference to the appended drawing in which:
- la fig. 1 est une vue partielle en demi-coupe axiale de la chambre de coupure d'un disjoncteur, selon la demande de brevet FR 2 629 260 Al, en cours de manœuvre d'ouverture, - fig. 1 is a partial view in axial half-section of the breaking chamber of a circuit breaker, according to patent application FR 2 629 260 A1, during the opening operation,
- la fig. 2 est une vue similaire du disjoncteur muni des moyens additionnels de la présente invention. - fig. 2 is a similar view of the circuit breaker provided with the additional means of the present invention.
La fig. 1 montre une chambre de coupure comprenant une enveloppe 1, en matériau isolant tel que le céramique, remplie d'un gaz diélectrique tel que l'hexafluorure de soufre sous une pression de quelques bars. A l'intérieur de l'enveloppe, on trouve un ensemble comprenant un contact principal fixe formé de doigts de contacts 2 protégés par un capot pare-effluves 3 et un contact d'arc formé d'un tube métallique 4 terminé par une extrémité 4A en alliage résistant aux effets de l'arc. Fig. 1 shows a breaking chamber comprising an envelope 1, made of an insulating material such as ceramic, filled with a dielectric gas such as sulfur hexafluoride under a pressure of a few bars. Inside the envelope, there is an assembly comprising a fixed main contact formed by contact fingers 2 protected by a corona hood 3 and an arcing contact formed by a metal tube 4 terminated by one end 4A alloy resistant to the effects of the arc.
L'équipage mobile comprend un tube 5, métallique, servant de contact d'arc mobile, terminé par un embout 5A en alliage résistant aux effets de l'arc. The moving element comprises a metal tube 5 serving as a moving arcing contact, terminated by a tip 5A made of an alloy resistant to the effects of the arcing.
Le tube 5 est entraîné par un tube métallique 6, par exemple en aluminium, fixé à une tige de manœuvre non représentée. Les tubes 5 et 6 ne sont pas fixés l'un à l'autre; au contraire, un certain débattement entre eux est possible; l'entraînement se fait grâce à deux redans 5B et 6B des tubes 5 et 6. Le débattement est limité par une butée 6C. The tube 5 is driven by a metal tube 6, for example made of aluminum, fixed to an operating rod, not shown. Tubes 5 and 6 are not attached to each other; on the contrary, a certain clearance between them is possible; the drive is done by two steps 5B and 6B of the tubes 5 and 6. The travel is limited by a stop 6C.
Un tube métallique 7, concentrique au tube 5, sert de contact principal mobile. A metal tube 7, concentric with the tube 5, serves as a movable main contact.
Il porte une buse de soufflage 8 en matériau isolant. Il est en contact électrique avec un bloc métallique 9, en aluminium par exemple, solidaire de l'équipage fixe, par des doigts de contact 10. It carries a blowing nozzle 8 made of insulating material. It is in electrical contact with a metal block 9, made of aluminum for example, secured to the fixed assembly, by contact fingers 10.
Le tube 5 et le tube 7 sont solidarisés par une couronne isolante 12, percée de trous 12A. The tube 5 and the tube 7 are joined by an insulating ring 12, pierced with holes 12A.
Le volume 20 délimité par les tubes 5 et 7 est fermé par un piston fixe 14, en matériau isolant tel que le polytétrafluoroéthylène ou autres matériaux maintenu en place par un tube métallique 15 fixé au bloc 9. The volume 20 delimited by the tubes 5 and 7 is closed by a fixed piston 14, made of an insulating material such as polytetrafluoroethylene or other materials held in place by a metal tube 15 fixed to the block 9.
On désigne par 20 le volume délimité par les tubes 5 et 7, la couronne 12 et le piston 14. Ce volume constitue le cylindre de soufflage du disjoncteur. The volume delimited by the tubes 5 and 7, the ring 12 and the piston 14 is designated by 20. This volume constitutes the blow-out cylinder of the circuit breaker.
Le piston 14 est percé d'orifices 16 et comprend un clapet 17 n'autorisant le passage du gaz que de l'extérieur vers l'intérieur du volume 20. Le piston 14 comprend un joint d'étanchéité 18 et un guidage 19. The piston 14 is pierced with orifices 16 and comprises a valve 17 allowing the passage of gas only from the outside to the inside of the volume 20. The piston 14 comprises a seal 18 and a guide 19.
Les orifices 16 du piston 14 peuvent être obstrués par un piston annulaire 22, pouvant glisser dans l'espace annulaire constitué par le tube 5 et un prolongement cylindrique 23, percé de trous 23A, du piston 14. Le piston annulaire 22 est poussé contre les orifices 16 par un ressort 24 s'appuyant contre une partie solidaire du tube fixe 15. L'étanchéité du piston est assurée par des joints 26 et 27. The orifices 16 of the piston 14 can be obstructed by an annular piston 22, which can slide in the annular space formed by the tube 5 and a cylindrical extension 23, pierced with holes 23A, of the piston 14. The annular piston 22 is pushed against the orifices 16 by a spring 24 pressing against an integral part of the fixed tube 15. The piston is sealed by seals 26 and 27.
Une paire de contacts auxiliaires comprend: A pair of auxiliary contacts includes:
- un contact tubulaire fixe 30, muni d'une extrémité 30A en matériau résistant à l'arc, et fixé au tube 15, a fixed tubular contact 30, provided with an end 30A of arc-resistant material, and fixed to the tube 15,
- un contact tubulaire 31, muni d'une extrémité d'usure 31 A, fixé à un bloc de guidage en matériau isolant - a tubular contact 31, provided with a wear end 31 A, fixed to a guide block made of insulating material
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CH 681 751 A5 CH 681 751 A5
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32, et muni de contacts glissants 31B coopérant avec le tube 5. 32, and provided with sliding contacts 31B cooperating with the tube 5.
Le bloc isolant est guidé dans l'espace annulaire compris entre les tubes 5 et 15 grâce a une portion 32A venant en appui contre une butée 40 du tube 15. The insulating block is guided in the annular space between the tubes 5 and 15 thanks to a portion 32A coming to bear against a stop 40 of the tube 15.
Cette portion est munie d'orifices 33 pour permettre le libre passage du gaz dans le volume 35 compris entre le tube 15 et les pièces 31, 32 et 42. This portion is provided with orifices 33 to allow the free passage of the gas in the volume 35 comprised between the tube 15 and the parts 31, 32 and 42.
La pièce isolante 32 est munie d'un système d'en-cliquetage, par exemple à billes 36 et ressort 37, coopérant avec des gorges 38, 39. The insulating part 32 is provided with a snap-fastening system, for example with balls 36 and spring 37, cooperating with grooves 38, 39.
Le fonctionnement de ce disjoncteur a été décrit dans la demande de brevet FR 2 629 260 Al. The operation of this circuit breaker has been described in patent application FR 2 629 260 Al.
La fig. 2 représente une chambre de coupure d'un disjoncteur selon la présente invention. Les éléments communs aux fig. 1 et 2 ont reçu les mêmes numéros de référence. Fig. 2 shows a breaking chamber of a circuit breaker according to the present invention. The elements common to Figs. 1 and 2 were given the same reference numbers.
Selon l'invention, l'un des contacts secondaires, ici le contact 30, 30A, est entouré par une bobine électrique 80, de forme torique; une extrémité de cette bobine est électriquement reliée au contact 30; l'autre extrémité est reliée électriquement au tube 15. La bobine est fixée a un bloc isolant 81 solidaire du tube 15. According to the invention, one of the secondary contacts, here the contact 30, 30A, is surrounded by an electric coil 80, of toric shape; one end of this coil is electrically connected to contact 30; the other end is electrically connected to the tube 15. The coil is fixed to an insulating block 81 secured to the tube 15.
Le courant traversant la bobine produit un champ magnétique tendant à faire tourner l'arc 60 sur les extrémités 30A, 31A des contacts secondaires. De la sorte, l'arc balaye le volume 35 plus rapidement et l'échauffé dans son ensemble, ce qui accroît l'énergie thermique du volume 35 et augmente corrélativement l'énergie apportée au déplacement de l'équipage mobile du disjoncteur. The current passing through the coil produces a magnetic field tending to rotate the arc 60 on the ends 30A, 31A of the secondary contacts. In this way, the arc sweeps the volume 35 more quickly and heats it up as a whole, which increases the thermal energy of the volume 35 and correlatively increases the energy supplied to the movement of the moving equipment of the circuit breaker.
Cette disposition assure également une moindre usure des extrémités 30A, 31A des contacts secondaires, car la racine de l'arc ne se maintient pas en un même point. This arrangement also ensures less wear of the ends 30A, 31A of the secondary contacts, since the root of the arc is not maintained at the same point.
Selon une variante, des tubes isolants tels que le tube 82 et le tube 83 sont placés dans le volume thermique 35, coaxialement aux contacts secondaires 30 et 31, de manière à canaliser l'arc 60. According to a variant, insulating tubes such as the tube 82 and the tube 83 are placed in the thermal volume 35, coaxially with the secondary contacts 30 and 31, so as to channel the arc 60.
Le tube 82 est usiné dans le bloc isolant 81 auquel est fixé la bobine 80. The tube 82 is machined in the insulating block 81 to which the coil 80 is fixed.
Des orifices tels que 84 dans le bloc 83 assurent la communication entre les diverses parties du volume 35. Ports such as 84 in block 83 provide communication between the various parts of volume 35.
Bien entendu, il peut n'y avoir qu'un seul des tubes 82 et 83. Of course, there can be only one of the tubes 82 and 83.
Cette canalisation de l'arc permet une plus grande homogéniété de l'arc, ce qui favorise son extinction ultérieure. This channeling of the arc allows greater homogeneity of the arc, which promotes its subsequent extinction.
L'invention s'applique principalement aux disjoncteurs à haute tension à hexafluorure de soufre sous pression, mais également aux disjoncteurs moyenne tension. The invention applies mainly to high voltage circuit breakers with pressurized sulfur hexafluoride, but also to medium voltage circuit breakers.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8816138A FR2640420B2 (en) | 1988-03-23 | 1988-12-08 | HIGH-VOLTAGE LOW-ENERGY CIRCUIT BREAKER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH681751A5 true CH681751A5 (en) | 1993-05-14 |
Family
ID=9372714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH413989A CH681751A5 (en) | 1988-12-08 | 1989-11-17 | High voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH681751A5 (en) |
-
1989
- 1989-11-17 CH CH413989A patent/CH681751A5/en not_active IP Right Cessation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |