EP1225610B1 - Agencement de contacts d'arc pour disjoncteur - Google Patents

Agencement de contacts d'arc pour disjoncteur Download PDF

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Publication number
EP1225610B1
EP1225610B1 EP01810058A EP01810058A EP1225610B1 EP 1225610 B1 EP1225610 B1 EP 1225610B1 EP 01810058 A EP01810058 A EP 01810058A EP 01810058 A EP01810058 A EP 01810058A EP 1225610 B1 EP1225610 B1 EP 1225610B1
Authority
EP
European Patent Office
Prior art keywords
contact piece
switching
arrangement according
erosion
switching arrangement
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 - Lifetime
Application number
EP01810058A
Other languages
German (de)
English (en)
Other versions
EP1225610A1 (fr
Inventor
Thomas Dr. Schoenemann
Günter Dr. Speckhofer
Lukas Dr. Zehnder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to DE50114865T priority Critical patent/DE50114865D1/de
Priority to AT01810058T priority patent/ATE430374T1/de
Priority to EP01810058A priority patent/EP1225610B1/fr
Publication of EP1225610A1 publication Critical patent/EP1225610A1/fr
Application granted granted Critical
Publication of EP1225610B1 publication Critical patent/EP1225610B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/98—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
    • 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

Definitions

  • the invention relates to a Abbrandschaltan extract according to the preamble of claim 1, which is particularly suitable for use in circuit breakers, which are used for switching on and off of operating and overcurrents in plants for the generation and distribution of electrical energy.
  • This compressed gas is guided in two oppositely directed flows through the two hollow contact pieces in the two Auspuffsammlung and extinguishes the arc, whereby the interruption of the current to be disconnected is ensured.
  • the two hollow Shift pieces each arranged a valve. Below a threshold value of the pressure, the two valves seal the quenching chamber against the two exhausts. Above the pressure limit, the two valves open at the same time, thus enabling an effective arc blowing even when interrupting low-power currents.
  • the invention is based on the object to provide a Abbrandschaltan angel of the aforementioned type, which is in comparatively simple and weight-saving dimensioning of their components in a position to turn off even very high currents.
  • the closure element In the case of very large currents to be switched, the closure element is displaced out of its basic position under the action of the gas pressure prevailing in the arc chamber and releases the connection between the inlet opening and the outlet opening or the outlet openings, so that a pressure relief from the arc chamber into an exhaust space can take place.
  • the present invention thus enables a targeted limitation of immediately after the separation of the contact pieces occurring pressure increase in the arc chamber, which allows even with a provided for switching off very large currents Abbrandschaltanowski the components surrounding the arc space lighter and design the switch drive for a smaller breaking capacity.
  • the consumable switching arrangement 1 has two contact pieces 3 and 4 aligned in the direction of a switching axis 2.
  • the switching piece 3 is an axially movable switching pin, which by means of a switch drive, not shown in the direction of arrow A between a closed position ( Fig. 1 ) and a switch-off position ( Fig. 3 ) is displaceable.
  • the other switching piece 4 is formed as a fixed contact tulip, which is mounted in a central opening of a partition wall 5 and a plurality of arranged around the switching axis 2 and obliquely downwardly directed against the latter elastic contact fingers, which are separated by slots. In its closed position, the switching pin 3 projects into the contact tulip 4 in and is touched by their contact fingers from the outside ( Fig.
  • the contact tulip 4 opposite a nozzle 6 surrounding the switching axis 2 is arranged from an electrically insulating material, which has the shape of an upwardly narrowing funnel and is fixed in a central opening of a further partition wall 7.
  • the partition wall 7 closes a first exhaust space 8a upwards.
  • an arc chamber 9 in which an arc 10 is formed during the separation of the contact pieces 3, 4 between them ( Fig. 2 ).
  • the arc chamber 9 is surrounded by an annular heating volume 11 which communicates with the arc chamber 9 via a ring-shaped blow slot 12 which separates the contact tulip 4 from the nozzle 6.
  • the heating volume 11 is closed by a peripheral wall of an electrically insulating material.
  • the heating volume 11 is connected via blow channels 13 in the partition wall 7 with blowing cylinders, not shown, in which actuated by the switch actuator blow pistons are arranged.
  • a check valve 14 is installed in the outlet of each blow duct 13 in the heating volume 11.
  • a pressure chamber 15 connects, which is connected to the arc chamber 9 by an opening formed by the ends of the contact fingers of the contact tulip 4.
  • the pressure chamber 15 is limited by an above the contact tulip 4, annular cover 16 and a cap 17, both made of electrically insulating material.
  • the cover 16 and the spaced cap 17 form between them with respect to the Switching axis 2 rotationally symmetrical return channel 18 which extends from the pressure chamber 15 on all sides radially outward and is then guided in the axial direction to the heating volume 11.
  • a check valve 19 is installed in each case.
  • the pressure chamber 15 is connected by a number of uniformly distributed over the circumference of the exhaust pipes 20 with a second exhaust chamber 8b.
  • discharge openings 21 are provided in the cap 17, which connect the return channel 18 with the second exhaust chamber 8b and are closed by a piston 22 of a pressure relief valve 23 serving as a safety valve. These pistons 22 are pressed by disc springs 24 in the discharge openings 21.
  • a cavity 25 is formed in its interior. This has an opening 27 provided on the switching tip 26 and a plurality of outlet openings 28 distributed on the circumference of the switching pin 3. The latter are arranged in the direction of the switching axis 2 at such a distance from the inlet opening 27 that they open into the first exhaust space 8 a, as soon as the switching pin 3 is released from the contact tulip 4 during the switch-off.
  • a closure element 29 is provided which is displaceably guided in the cavity 25 in the direction of the switching axis 2.
  • the closure element 29 is connected to a guide pin 30, which is guided in a guide 31 in the switching pin 3.
  • the guide pin 30 is supported with a plate 32 on a compression spring designed as a closing spring 33, which is housed in a further cavity 34 in the interior of the switching pin 3.
  • the closure element 29, the guide pin 30 and the plate 32 are made of an electrically insulating material, such as polytetrafluoroethylene (PTFE).
  • the pressure of the insulating gas in the heating volume 11 is still high enough after a pressure relief over the interior of the switching pin 3 to effect a deletion of the arc 10 in a known manner.
  • the burn-up switch assembly 1 is shown after extinguishing the arc and with the switching pieces 3, 4 in the fully open state.
  • the described targeted pressure relief can be shortly after the separation of the contact pieces 3, 4 a To achieve regulation of the pressure build-up in the arc chamber 11. This avoids that when switching off very high currents at which the pinch pressure of the arc 10 is large, the arranged in the heating volume 11 or this surrounding components are exposed to a very high mechanical stress. These components can therefore be dimensioned easier.
  • the pressure relief valve 23 only has the function of a safety valve and has no influence on the actual switch-off.
  • the closure element 29 is in at least one place in electrically very good conductive connection with the switching pin 3. In the illustrated embodiment, this electrically conductive connection is made via disposed in the guide 31 contact blades 35.
  • the in the 6 and 7 Burn-off switching arrangement shown is preferably used in circuit breakers with which very high short-circuit currents must be disconnected.
  • the arc 10 has a surface which is larger around the surface of the closing element 29 than the surface formed solely by the switching pin 3, which means that the current density at the arc base points does not become too high.
  • the consumable switching arrangement according to the 6 and 7 is also suitable for switches with which very often small currents (usually rated currents) are turned off. In such switches, the electrically conductive closure element 29 relieves the switching pin 3 of the consequences of the burn-up and thus contributes to an increase in its life.
  • the closure element 29 is in its front end position at a distance from the inlet opening 27, but still between this and the outlet openings 28 are arranged. This means that even in this embodiment, the closure element 29 in its basic position in which it is held by the closing spring 33, the compound between the inlet opening 27 and the outlet openings 28 keeps closed.
  • This connection is the same as in the embodiments according to the Fig. 1-7 only released when the gas pressure in the arc chamber 9 is large enough to cause a repression of the closing element 29 in its rear end position against the force of the closing spring 33.
  • This third embodiment whose operation is the same as that of the other two embodiments, has the advantage that because of the short distance to be traversed by the closing element 29, the connection between the inlet opening 27 and the outlet openings 28 is released very quickly. This is of particular advantage in cases where the pressure increase in the heating volume 11 or in the arc chamber 9 takes place very rapidly.
  • the material for the closure element 29 and also the guide pin 30 and the plate 32
  • above all the required mechanical stability is crucial.
  • a burn-off-resistant plastic or a burn-off-resistant metal is to be used for the closure element 29, since the gases acting on the closure element 29 are very hot.
  • burn-off switching arrangements described above can also be formed differently than shown in the context of the invention.
  • the inventive Abbrandschaltan extract with a new design of a switching piece can not only in circuit breakers of the in the DE-A-198 16 505 shown Art be used, but also in circuit breakers of other suitable design.

Landscapes

  • Breakers (AREA)
  • Circuit Breakers (AREA)
  • Keying Circuit Devices (AREA)

Claims (12)

  1. Système anti-étincelles pour commutateur de puissance qui présente deux pièces de commutation (3, 4) qui peuvent passer l'une par rapport à l'autre le long d'un axe de commutation (2) entre une position de branchement dans laquelle elles sont en contact mutuel et une position de débranchement dans laquelle elles sont écartées l'une de l'autre d'une distance de commutation dans la direction axiale, et qui définissent ensemble une chambre (9) à arc lumineux,
    qui présente une cavité (25) prévue à l'intérieur de la première pièce de commutation (3), reliée d'une part à une ouverture d'admission (27) formée à l'extrémité libre de cette première pièce de commutation (3) et orientée vers la deuxième pièce de commutation (4), et d'autre part à au moins une ouverture d'évacuation (28) située à distance de l'ouverture d'admission (27) dans la direction de l'axe de commutation (2) et prévue dans la première pièce de commutation (3),
    une tuyère (6) qui entoure l'axe (2) des pièces de commutation, en un matériau électriquement isolant, par laquelle la première pièce de commutation (3) est attirée de la position de branchement à la position de débranchement lors du débranchement,
    un élément coulissant (29) disposé dans la cavité (25) de la première pièce de commutation (3) et apte à coulisser dans la direction de l'axe de commutation (2) étant prévu et étant, dans une position de base, maintenu sous l'action d'un élément élastique de rappel dans une position d'extrémité avant dans laquelle il sépare la ou les ouvertures d'évacuation (28) de l'ouverture d'admission (27) et de laquelle il peut coulisser jusque dans une position d'extrémité arrière dans la direction de l'ouverture d'admission (27), en opposition à la force de l'élément de rappel, par la pression de gaz qui agit dans la chambre (9) à arc lumineux lors de la séparation des pièces de commutation (3, 4),
    tandis que dans la position d'extrémité arrière, il libère la liaison entre l'ouverture d'admission (27) et la ou les ouvertures d'évacuation (28) qui débouchent dans une chambre d'échappement (8a) après la séparation des pièces de commutation (3, 4), lors d'une phase du déplacement de débranchement de la première pièce de commutation (3) au cours de laquelle son extrémité libre est encore située entre la tuyère (6) et la deuxième pièce de commutation (4).
  2. Système anti-étincelles selon la revendication 1, caractérisé en ce que l'élément de fermeture (29) ferme l'ouverture d'admission (27) lorsqu'il est en position de base.
  3. Système anti-étincelles selon la revendication 1, caractérisé en ce que lorsqu'il est dans sa position de base, l'élément de fermeture (29) prend une position d'extrémité avant située entre l'ouverture d'admission (27) et la ou les ouvertures d'évacuation (28).
  4. Système anti-étincelles selon l'une des revendications 1 à 3, caractérisé en ce que l'élément de fermeture (29) est guidé longitudinalement au moyen d'un guide (31) prévu dans la première pièce de commutation (3).
  5. Système anti-étincelles selon l'une des revendications 1 à 4, caractérisé en ce que l'élément de rappel est un ressort de fermeture (33).
  6. Système anti-étincelles selon l'une des revendications 1 à 5, caractérisé en ce que plusieurs ouvertures d'évacuation (28) qui partent de la cavité (25) sont prévues à la périphérie de la première pièce de commutation (3).
  7. Système anti-étincelles selon l'une des revendications 1 à 6, caractérisé en ce que la cavité (25) qui s'étend en direction de l'axe de commutation (2) est formée à l'extrémité avant (26) de la première pièce de commutation (3).
  8. Système anti-étincelles selon l'une des revendications 1 à 7, caractérisé en ce que l'élément de fermeture (29) est relié à un goujon de guidage (30) guidé longitudinalement dans la première pièce de commutation (3) et soutenu sur l'élément de rappel installé à l'intérieur de la première pièce de commutation (3).
  9. Système anti-étincelles selon l'une des revendications 1 à 8, caractérisé en ce que l'élément de fermeture (29) est constitué d'un matériau électriquement isolant.
  10. Système anti-étincelles selon l'une des revendications 1 à 8, caractérisé en ce que l'élément de fermeture (29) est constitué d'un matériau électriquement conducteur et est relié de manière électriquement conductrice à la première pièce de commutation (3).
  11. Système anti-étincelles selon l'une des revendications 1 à 10, caractérisé en ce que la deuxième pièce de commutation (4) est fixe et en ce que la première pièce de commutation (3) peut être déplacée dans la direction de l'axe de commutation (2) au moyen d'un entraînement du commutateur.
  12. Système anti-étincelles selon l'une des revendications 1 à 11, caractérisé en ce que la première pièce de commutation (3) est configurée comme tige de commutation.
EP01810058A 2001-01-23 2001-01-23 Agencement de contacts d'arc pour disjoncteur Expired - Lifetime EP1225610B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE50114865T DE50114865D1 (de) 2001-01-23 2001-01-23 Abbrandschaltanordnung für einen Leistungsschalter
AT01810058T ATE430374T1 (de) 2001-01-23 2001-01-23 Abbrandschaltanordnung für einen leistungsschalter
EP01810058A EP1225610B1 (fr) 2001-01-23 2001-01-23 Agencement de contacts d'arc pour disjoncteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01810058A EP1225610B1 (fr) 2001-01-23 2001-01-23 Agencement de contacts d'arc pour disjoncteur

Publications (2)

Publication Number Publication Date
EP1225610A1 EP1225610A1 (fr) 2002-07-24
EP1225610B1 true EP1225610B1 (fr) 2009-04-29

Family

ID=8183683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01810058A Expired - Lifetime EP1225610B1 (fr) 2001-01-23 2001-01-23 Agencement de contacts d'arc pour disjoncteur

Country Status (3)

Country Link
EP (1) EP1225610B1 (fr)
AT (1) ATE430374T1 (fr)
DE (1) DE50114865D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455957A1 (fr) 2010-11-22 2012-05-23 ABB Research Ltd. Système de disjoncteur à isolation gazeuse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811508C2 (de) * 1977-03-24 1983-06-16 Mitsubishi Denki K.K., Tokyo Elektrischer Druckgasschalter
FR2418963A1 (fr) * 1978-03-01 1979-09-28 Merlin Gerin Dispositif d'extinction d'arc a autosoufflage et a arc tournant
FR2646961B1 (fr) * 1989-05-11 1994-01-28 Gec Alsthom Sa Disjoncteur a moyenne tension a autosoufflage
DE19816505A1 (de) * 1998-04-14 1999-10-21 Asea Brown Boveri Leistungsschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455957A1 (fr) 2010-11-22 2012-05-23 ABB Research Ltd. Système de disjoncteur à isolation gazeuse

Also Published As

Publication number Publication date
EP1225610A1 (fr) 2002-07-24
ATE430374T1 (de) 2009-05-15
DE50114865D1 (de) 2009-06-10

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