EP0626708B1 - Disjoncteur sectionneur - Google Patents

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Publication number
EP0626708B1
EP0626708B1 EP94105340A EP94105340A EP0626708B1 EP 0626708 B1 EP0626708 B1 EP 0626708B1 EP 94105340 A EP94105340 A EP 94105340A EP 94105340 A EP94105340 A EP 94105340A EP 0626708 B1 EP0626708 B1 EP 0626708B1
Authority
EP
European Patent Office
Prior art keywords
contact
extinction
break switch
plates
load break
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
EP94105340A
Other languages
German (de)
English (en)
Other versions
EP0626708A1 (fr
Inventor
Erwin Dipl.-Ing. Reichl
Werner Heinzelmann
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.)
Schneider Electric Sachsenwerk GmbH
Original Assignee
Sachsenwerk AG
AEG Sachsenwerk GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sachsenwerk AG, AEG Sachsenwerk GmbH filed Critical Sachsenwerk AG
Publication of EP0626708A1 publication Critical patent/EP0626708A1/fr
Application granted granted Critical
Publication of EP0626708B1 publication Critical patent/EP0626708B1/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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10—Metal parts
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/045—Means for extinguishing or preventing arc between current-carrying parts for arcs formed during closing
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container

Definitions

  • the invention relates to a switch disconnector according to the preamble of the first claim.
  • a contact arrangement is formed from a pivotably mounted contact arm designed as a switching blade and a stationary fixed contact cooperating therewith, which sits on a busbar which is at the same time the carrier of an arc quenching chamber.
  • arc quenching chamber between two side walls running parallel to one another and to the busbar, individual, likewise in parallel planes and at a distance from one another are held, which are arranged so offset to one another in planes running parallel to the busbar that the distance between the separating knife and the facing edges the quenching plate increases in the course of the switch-off movement of the cutting knife.
  • the plane receiving the cutting knife in its switched-on position is perpendicular to the planes in which the quenching plates lie.
  • the extinguishing plates made of ferromagnetic material are thus essentially parallel to the arc drawn between the fixed contact and the disconnecting knife.
  • the thin-walled quenching plates which face the arc over a large area, reach their magnetic saturation due to the magnetic field generated by the arc, even at relatively low switch-off currents that with increasing switching currents there is no increasing magnetic influencing of the switching arc, which supports the quenching effect, by the quenching plates.
  • the invention has for its object to take measures in a switch disconnector according to the preamble of the first claim, by means of which an improvement in the arc behavior is achieved.
  • a switch disconnector in one embodiment, not only the arrangement of the quenching plates, approximately perpendicular to the switching arc, improves the switch-off arcing behavior because the effectiveness of the individual quenching plates is increased. Rather, it is also prevented by the increase in the distance between the end edges of the quenching plates and the facing end of the contact arm at the end of the switch-in pivoting path, in particular when used in Medium-voltage range an undesired pre-ignition occurs when switching on via the extinguishing plates. This reduction in the tendency to pre-ignition occurs even if the side walls of the insulating material which laterally delimit the arcing chamber already show a reduction in the insulating capacity after a switching load.
  • the contact arm which is designed in particular as a switching knife, only approaches the quenching plates most closely where, based on the voltage to be switched, there is a real chance for the first time to interrupt the first quenching phase.
  • the switching arc first burns between the switching knife end and the fixed contact, but then optimally on the one hand due to the magnetic driving force of the current loop formed by the switching arc via a guide horn possibly associated with the fixed contact and on the other hand due to the close proximity of the switching knife to the quenching plate package is brought up to these quenching plates. This results in a very good quenching behavior up to currents of around one kiloampere and an excellent dielectric behavior of the switch disconnector both when switching on and when switching off.
  • the quenching plates are preferably combined into a rectangular package, in which case they lie in planes which run approximately parallel to that in which the contact arm lies in an intermediate or central position of its swivel path.
  • the greatest point of approach in this arrangement is preferably approximately in the area of the middle quenching plates.
  • the quenching plates can also lie in planes that run approximately parallel to that in which the contact arm is in the closed position of the contact arrangement.
  • the end edges of the extinguishing plates arranged between the fixed contact and the point of greatest proximity facing the swivel arc of the contact arm are increasingly set in a staggered manner so that they lie approximately in one plane runs approximately parallel to that in which the tangent to the swivel arc of the contact arm lies at the point of greatest approximation.
  • the quenching plates which are provided in the opening pivoting direction of the contact arm after the point of closest approach, can then be perpendicular to the plane in which their front edges lie.
  • the extinguishing plates arranged in the opening swivel direction after the point of greatest approximation can be staggered in the opposite direction to the end edges of the extinguishing plates provided before this point.
  • the quenching plates are held between two mutually parallel insulating material walls, then it is expedient to prefer these insulating material walls to the contact arm to such an extent that at least the contact area of the contact arm is covered laterally approximately over the swivel path.
  • This arrangement is particularly advantageous if a plurality of contact arrangements with arcing chambers are arranged next to one another in the direction of the common axis of the contact arms in a common housing space filled with insulating gas. It is then sufficient for sufficient electrical insulation between the circuit breakers assigned to the individual phases of a network to be switched, if in particular the extended sections of the insulating side walls have a lateral distance from the respective contact arms have about one third of the clear width between adjacent contact arms.
  • the point of greatest proximity of the switching knife to the extinguishing plates can, depending on the specific conditions in each case, be about 25% to 75% of the total swivel path of the contact arm.
  • the contact area of the contact arm is laterally covered over its swivel path by the protruding sections of the insulating material side walls.
  • the arc quenching chamber is preferably attached directly to the fixed contact, so that additional holding means are unnecessary.
  • An arc guide horn assigned to the fixed contact is expediently arranged such that it engages under the first adjacent quenching plate and is approximately as far away from this first quenching plate as is given between adjacent quenching plates.
  • the distance between adjacent quenching plates is in particular not smaller than the diameter of the arc discharge channel at the maximum breaking current of the circuit breaker.
  • the smallest possible distance between the quenching plates increases the quenching chamber pressure and thus compensates for the decrease in density resulting from the heating of the insulating gas, which contributes to a constant dielectric strength of the dielectric gas.
  • a maximum quenching plate area is also sought in order to achieve the greatest possible electrical capacity for voltage control of the partial interruption distances for an arc between the quenching plates.
  • the end edges of the extinguishing plates facing the switching knife preferably have a cutout which is in particular V-shaped in order to be able to fully utilize the extinguishing behavior in the electronegative insulating gas.
  • a switch disconnector arranged in electronegative insulating gas, in particular sulfur hexafluoride SF 6 or mixtures therewith, has a contact arrangement comprising a stationary fixed contact 1 and a contact arm 2, which can be brought into contact system at one end and is designed as a separating knife. At its end facing away from the contact area 3, the contact arm 2 is pivotally mounted on a contact carrier 5 about an axis 4.
  • the contact arrangement 1, 2 is assigned an arc quenching chamber 6, which receives quenching plates 7 which are layered parallel to one another and spaced apart from one another.
  • the quenching plates 7 run essentially parallel to the plane in which the contact arm according to FIG. 1 lies in a central position, indicated at 8, of its limited pivoting path, indicated by an arc line 9.
  • the quenching plates 7 can be arranged in the form of a rectangular package, the end edges 10 of the quenching plates 7 lying in a plane that runs parallel to a plane that receives a tangent that is located at the point 11 of the swivel path curve 9 at which yourself the Contact arm 2 is in the middle intermediate position 8.
  • the quenching plates 7 are approximately perpendicular to the arcing channel, which arises when the contact arrangement 1, 2 opens between the fixed contact 1 and the contact area 3 of the contact arm 2.
  • the fixed contact 1 is also assigned an arc guide horn 12, which engages under the first extinguishing plate 7 facing the fixed contact 1 and is arranged approximately parallel to it. Its distance from this first quenching plate 7 corresponds approximately to that between the other quenching plates 7.
  • the switching arc is switched off, it is first drawn between the contact area 3 of the contact arm 2 and the fixed contact 1, but then on the one hand by the magnetic driving force of the arc current loop on the guide horn 12 and, on the other hand, due to the magnetic effects, the contact between the contact arm switching knife 2 and the quenching plate packet 7 optimally leads to the quenching plates 7, which can be referred to as deion plates.
  • the larger distance between the contact area 3 and the first quenching plate 7 is thus irrelevant.
  • the distance between adjacent quenching plates 7 becomes in particular not chosen smaller than the diameter of the arc discharge channel at maximum breaking current.
  • the area of the individual quenching plates 7 is made as large as possible. Their length should be equal to or greater than the width.
  • cutouts 13 are provided, which are in particular U-shaped or V-shaped and in SF 6 possible close approach of the contact area 3 to the end edges 10 enable an optimal electrical field distribution.
  • an offset layering of the fire-fighting plates 7 can be achieved be made at the beginning of the switch-off pivot path 9.
  • the quenching plates 7 can lie in planes that run approximately parallel to the plane indicated at 14 in which the contact arm 2 lies in the closed position of the contact arrangement 1, 2.
  • the end edges 10.2 facing the swivel arc 9 of the contact arm 2 of the extinguishing plates 7 arranged between the fixed contact 1 and the point 11 of greatest proximity then lie in a plane which runs approximately parallel to that in which the tangent to the swivel arc 9 at point 11 of the greatest approximation. This also ensures that the free radial distance between the contact region 3 and the quenching plates 7 closest to the fixed contact 1 is reduced to point 11.
  • the remaining quenching plates 7, which follow in the opening pivoting direction of the contact arm 2 after point 11, can be perpendicular to the plane in which their end edges 10.1 lie.
  • the front edges 10.1 of these quenching plates 7 can, if necessary, also be staggered in the opposite direction to the offset of the quenching plates 7 in front of them from point 11, so that the distance between the contact area 3 and the front edges 10.1 increases faster in the course of the opening movement than in the case of a right-angled package arrangement.
  • the measure of increasing the radial distance between the contact area 3 and the extinguishing plates 7 facing it during the closing movement of the contact arm 2 from an intermediate position 8 has the additional significant advantage that there is no risk of pre-ignition to the extinguishing plates 7 when the switch is turned on, because at point 11 the dielectric strength can be chosen to be sufficiently high due to the given capacitive voltage division and, as the contact arm 2 approaches the fixed contact 1, the increasing voltage load to the extinguishing plates 7 is counteracted by increasing the distance.
  • This advantage is also retained if the insulating material side walls 15, between which the quenching plates 7 are held and which laterally delimit them, already exhibit a reduction in their insulating capacity after switching loads.
  • the insulating material side walls 15 are so far advanced toward the axis 4 of the contact arm 2 that at least the contact area 3 of the contact arm 2 is covered on both sides at least approximately over the entire swivel path 9, which is, for example, almost 90 degrees.
  • a plurality of contact arrangements 1, 2 with arcing chambers 6, 7 can be arranged next to one another in a common housing space, not shown, in the common direction of the adjacent contact arms 2 determined by the axis 4.
  • These preferred sections 15.1 of the insulating walls 15 then only need to have a lateral distance from the respective contact arms 2, which corresponds to approximately one third of the clear distance between adjacent contact arms 2.
  • the advanced sections 15.1 of the insulating material side walls 15 are offset in the region outside of the extinguishing plates 7 laterally outwards.
  • the arc quenching chamber 6, 7 is held together with the fixed contact 1 on an insulation support 16, which, like an insulator 17 holding the contact carrier 5, is fastened to wall parts of the housing space mentioned. It is also advantageous with this design that no separate intermediate partition walls are required between individual switch poles of a multi-phase switch disconnector constructed in this way and also to the side walls of the relevant housing space.

Landscapes

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

Claims (17)

  1. Sectionneur de coupure en charge, en particulier pour des installations de distribution à moyenne tension, comprenant une disposition de contacts se composant d'un contact fixe stationnaire (1) et d'un bras de contact (2) logé de manière pivotante en position de contacts avec le précédent, une chambre d'extinction d'arc (6) associée à la disposition de contacts, la disposition de contacts étant disposée, avec la chambre d'extinction d'arc, dans un gaz isolant négatif, en particulier SF6, ou des mélanges, et comprenant des tôles d'extinction empilées parallèlement entre elles à distance les unes des autres dans la chambre d'extinction d'arc, caractérisé en ce que les tôles d'extinction (7) s'étendent sensiblement parallèlement au plan dans lequel le bras de contact (2) est en position de fermeture ou dans une position intermédiaire (8) de sa course de pivotement (9) et en ce que la distance radiale libre entre le bras de contact (2) et les tôles d'extinction (7) est la plus petite après une partie de la course de pivotement (9).
  2. Sectionneur de coupure en charge selon la revendication 1, caractérisé en ce que les tôles d'extinction (7) sont rassemblées en un paquet rectangulaire et sont dans des plans qui sont à peu près parallèles à celui dans lequel se trouve le bras de contact (2) dans une position intermédiaire (8) de sa course de pivotement (9).
  3. Sectionneur de coupure en charge selon la revendication 2, caractérisé en ce que les tôles d'extinction (7) se trouvent dans des plans qui sont à peu près parallèles à celui dans lequel se trouve le bras de contact (2) à son rapprochement le plus grand.
  4. Sectionneur de coupure en charge selon la revendication 1, caractérisé en ce que les tôles d'extinction (7) se trouvent dans des plans qui sont à peu près parallèles à celui dans lequel se trouve le bras de contact (2) en position de fermeture de la disposition de contacts (1, 2) et en ce que les bords frontaux (10.2), tournés vers l'arc de pivotement (9) du bras de contact (2), des tôles d'extinction (7), disposées entre le contact fixe (1) et le point (11) du plus grand rapprochement, sont dans un plan qui est à peu près parallèle à celui dans lequel la tangente à l'arc de pivotement (9) se trouve au point (11) du plus grand rapprochement.
  5. Sectionneur de coupure en charge selon la revendication 4, caractérisé en ce que les tôles d'extinction (7), qui sont prévues dans le sens de pivotement d'ouverture du bras de contact (2) après le point (11) du plus grand rapprochement, sont perpendiculaires au plan dans lequel se trouvent leurs bords frontaux (10.1).
  6. Sectionneur de coupure en charge selon la revendication 4, caractérisé en ce que les bords frontaux (10.1) des tôles d'extinction (7), qui sont disposés dans le sens de pivotement d'ouverture du bras de contact (2) après le point (11) du plus grand rapprochement, sont empilés dans le sens inverse des bords frontaux (10.2) des tôles d'extinction (7) prévues avant ce point (11).
  7. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que les tôles d'extinction (7) sont maintenues entre deux parois latérales (15) en matière isolante, disposées parallèlement entre elles.
  8. Sectionneur de coupure en charge selon la revendication 7, caractérisé en ce que plusieurs dispositions de contacts (1, 2) avec des chambres d'extinction (6, 7) sont disposées les unes à côté des autres en direction du sens axial commun des bras de contact (2) dans un espace de coffret commun.
  9. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que les parois latérales (15) en matière isolante sont avancées en direction du bras de contact (2) suffisamment pour qu'au moins la zone de contact (3) du bras de contact (2) soit au moins recouverte approximativement latéralement sur la course de pivotement (9).
  10. Sectionneur de coupure en charge selon la revendication 8 ou 9, caractérisé en ce que les sections avancées (15.1) des parois latérales en matière isolante (15) présentent une distance latérale par rapport aux bras de contact respectifs (2), qui s'élève à environ 1/3 de la distance interne entre les bras de contact voisins (2).
  11. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que les tôles d'extinction (7) sont munies d'un traitement de surface influençant positivement le comportement d'extinction.
  12. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que le point (11) du plus grand rapprochement entre la lame de commande (2) et les tôles d'extinction (7) est atteint après une partie de la course de pivotement d'environ 25 % à 75 %.
  13. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que la chambre d'extinction d'arc (6, 7) est fixée sur le contact fixe (1).
  14. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que le contact fixe (1) est associé à une corne directrice d'arc (12) qui passe sous une première tôle d'extinction (7), à laquelle se forme une boucle de courant et qui se trouve, devant la première tôle d'extinction (7), tournée vers elle, à une distance aussi grande que la distance entre les tôles d'extinction voisines (7).
  15. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que la distance entre les tôles d'extinction voisines (7) n'est pas inférieure au diamètre du canal de décharge d'arc en présence d'un courant maximal de coupure.
  16. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que la surface des différentes tôles d'extinction (7) est la plus grande possible, leur longueur étant égale ou supérieure à la largeur.
  17. Sectionneur de coupure en charge selon la revendication 1 ou l'une des suivantes, caractérisé en ce que les bords frontaux (10), tournés vers la lame de contacts (2), présentent des découpes en forme de U ou de V.
EP94105340A 1993-05-25 1994-04-07 Disjoncteur sectionneur Expired - Lifetime EP0626708B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4317354A DE4317354A1 (de) 1993-05-25 1993-05-25 Lasttrennschalter
DE4317354 1993-05-25

Publications (2)

Publication Number Publication Date
EP0626708A1 EP0626708A1 (fr) 1994-11-30
EP0626708B1 true EP0626708B1 (fr) 1997-03-19

Family

ID=6488856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105340A Expired - Lifetime EP0626708B1 (fr) 1993-05-25 1994-04-07 Disjoncteur sectionneur

Country Status (4)

Country Link
EP (1) EP0626708B1 (fr)
DE (2) DE4317354A1 (fr)
FI (1) FI942398A7 (fr)
NO (1) NO941924L (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2868927A (en) * 1956-05-03 1959-01-13 Ite Circuit Breaker Ltd Solenoid interrupter
US3441699A (en) * 1968-05-27 1969-04-29 Erickson Electrical Equipment Arc control apparatus for load-break switches
DE7022279U (de) * 1970-06-13 1971-09-09 Siemens Ag Elektrischer Schalter
SU922895A1 (ru) * 1980-08-25 1982-04-23 Vni Pk I T I Vzryvozaschi Дугогасительное устройство 1
FR2511807A1 (fr) * 1981-08-20 1983-02-25 Alsthom Atlantique Sectionneur interrupteur multipolaire a embrochage et debrochage sur un jeu de barres
DE8410454U1 (de) * 1984-04-04 1985-05-15 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Lichtbogenlöscheinrichtung für Schaltgeräte der elektrischen Energietechnik
DE3820489A1 (de) * 1988-06-16 1989-12-21 Felten & Guilleaume Energie Gekapselte lasttrennschalteranordnung
FI87614C (fi) * 1991-05-06 1993-01-25 Abb Stroemberg Saehkoenjakelu Slaeckningsanordning foer ljusbaoge foer en kopplingsapparatur

Also Published As

Publication number Publication date
NO941924D0 (no) 1994-05-24
DE4317354A1 (de) 1994-12-01
FI942398A0 (fi) 1994-05-24
EP0626708A1 (fr) 1994-11-30
DE59402115D1 (de) 1997-04-24
FI942398A7 (fi) 1994-11-26
NO941924L (no) 1994-11-28

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