EP0434100B1 - Interrupteur à gaz comprimé - Google Patents

Interrupteur à gaz comprimé Download PDF

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Publication number
EP0434100B1
EP0434100B1 EP90125330A EP90125330A EP0434100B1 EP 0434100 B1 EP0434100 B1 EP 0434100B1 EP 90125330 A EP90125330 A EP 90125330A EP 90125330 A EP90125330 A EP 90125330A EP 0434100 B1 EP0434100 B1 EP 0434100B1
Authority
EP
European Patent Office
Prior art keywords
blast
contact
arm
bearing
fulcrum
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
EP90125330A
Other languages
German (de)
English (en)
Other versions
EP0434100A3 (en
EP0434100A2 (fr
Inventor
Werner Heinzelmann
Peter Dipl.-Ing. Illmann
Erwin Dipl.-Ing. Reichl
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 EP0434100A2 publication Critical patent/EP0434100A2/fr
Publication of EP0434100A3 publication Critical patent/EP0434100A3/de
Application granted granted Critical
Publication of EP0434100B1 publication Critical patent/EP0434100B1/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
    • H01H33/88—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
    • H01H33/886—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 by movement of rotating pistons

Definitions

  • the invention relates to a gas pressure switch according to the preamble of the first claim.
  • a known gas pressure switch of this type (DE-A-10 62 789) there is a correspondingly movable contact piece at the free end of a pivotably mounted contact arm which, in the closed position, engages like a knife between contact blades of a fixed mating contact.
  • a coupling rod which is connected to a drive device, acts on the contact arm.
  • a blower housing of a piston blowing device which is rigidly attached to the blower housing, is also located on the contact arm, the blower housing being designed as a sector-shaped cylinder, in the center of the circular arc of which an adapted pivoting piston is pivotally mounted.
  • the pivot axis of the piston blowing device is identical to that of the contact arm.
  • a double link mechanism serves as the drive connection between the blower housing and the piston, which is connected on the one hand to the contact arm and on the other hand to the piston, the second ends of the links being rotatably mounted on an additional, freely pivotable eccentric plate.
  • the air compressed in this way is expelled via a blow pipe attached to the blow housing, the free end of which is directed as a blow nozzle parallel to the contact arm towards the movable contact.
  • the blow air flow generated is used only insufficiently for quenching the arc.
  • a low-liquid extinguishing chamber switch is also known (DE-A-714 085), which in an encapsulated housing has a movable contact fixed therein and a mating contact fixed outside this housing.
  • the quenching chamber housing is mounted so as to be linearly movable on the elongated fixed counter contact and is moved via a lever gear, which at the same time drives a pivoting piston pivotally mounted in a quenching chamber housing within a flow chamber to generate the required flow of extinguishing agent via a gear mechanism.
  • the invention has for its object to take measures in a pressure gas switch according to the preamble of the first claim, through which an improved blowing of the arc is achieved with a simple structure.
  • the movable contact is incorporated into the cooling air flow and the compressed air is expelled in the direction of the swivel arc through the blowing nozzle initially coaxially surrounding the fixed contact against the swivel direction during the contact opening process. Since the fixed contact largely closes the blower nozzle in the first region of the swivel angle, there is an increased compression of the air in the blower housing, so that when the fixed contact exits the blower nozzle, an intensive flow of cooling air is expelled in the axial direction of the resulting arc. As a result, the arc is comprehensively cooled by the extinguishing agent flow over at least part of its length.
  • the blower housing is cylindrical and encloses the movable contact with its bottom region lying outside the piston stroke, which is arranged in particular at a radial distance from the inner housing, so that a flow channel for the extinguishing agent gas is formed.
  • the piston is designed as a thrust piston which is articulated via an axially directed push rod to one end of a two-armed control lever, the second arm of which engages via an elongated hole with a pin fixed on the pivotably mounted lever.
  • the control lever sits at the free end of one the movable contact arm supporting support arm, the bearing point is preferably selected so that an increased actuating speed of the piston is achieved at the beginning of the pivoting angle during the opening movement.
  • the elongated hole is preferably arcuate in such a way that the piston stroke is increased compared to a straight elongated hole guide.
  • the length of the arm of the control lever connected to the push rod can be dimensioned such that the articulation point between the two parts intersects twice the longitudinal axis of the blower housing.
  • the force steering points on the control lever are chosen so that a considerable path translation is achieved to achieve a large stroke.
  • the movable contact arm is preferably U-shaped, as a result of which the blower housing can be arranged between the legs and extends parallel to the connecting web of the legs.
  • the U-shape of the contact arm improves the electrodynamic behavior when loaded with short-circuit currents, because the current forces that occur act in the sense of opening the contacts.
  • An insulating support 1 carries a substantially horizontally projecting support arm 2, on which a leg 3 of a U-shaped contact arm 4 is pivotally mounted about a pivot point 5.
  • the other leg 6 carries at its free end a ring contact 7 composed of segments, which is radially compressed by springs 8 to generate the necessary contact pressure.
  • a blower housing 9 which is cylindrical and whose axis 10 runs approximately parallel to the web of the contact arm 4 connecting the legs 3, 6.
  • the blower housing 9 is open towards the pivotably articulated leg 3 and, with its opposite bottom region, encloses the contact 7, which in the switched-on position electrically encloses a finger-like, fixed counter-contact 12 extending in the pivoting direction of the contact 7.
  • a blow nozzle 13 formed in the area of the movable contact 7 on the blow housing 9 extends away from the contact 7 concentrically to the counter contact 12 and surrounds it with a small radial distance.
  • a piston 14 which is displaceable in the direction of the axis 10 and is provided on its side facing the articulated leg 3 with a push rod 15 which extends in the direction of the axis 10.
  • the push rod 15 extends approximately to the opening of the blower housing in the region of the leg 3 19 is pivotable.
  • the bearing point 19 lies with respect to the axis 10 of the blower housing 9 opposite the pivot point 5 and thus in the region of the web 4.1.
  • the other arm 20 of the control lever 18 has an elongated hole 21 extending in the longitudinal direction of the arm, into which a Transition from the leg 3 to the web 4.1 arranged pin 22 engages.
  • the control lever 18 is designed and arranged so that the piston 14 is in the on position of the contacts 7, 12 close to the articulated leg 3 within the blower housing 9.
  • the distance between its articulation point 16 and the bearing point 19 is longer than the radial distance between the bearing point 19 and the pin 22 on the leg 3.
  • the pin 22 is in the region of the inner end of the slot 21.
  • the piston 14 is pushed into the blower housing 9 at an increased speed via the push rod 15 at the start of the pivoting movement.
  • the blowing nozzle 13 encloses the mating contact 12 relatively tightly, only a small leakage flow exits via the blowing nozzle, so that a rapid increase in pressure forms in the blowing housing.
  • the drawn arc is blown by a strong quenching gas flow and thus cooled for quenching.
  • the radial distance of the pin 22 from the bearing point 19 increases, so that the piston movement is reduced compared to the initial movement.
  • the arrangement of the pin 22 is such that there is initially no significant radial change in distance from the bearing point 19 during the initial range of the swivel angle.
  • the pin 22 is accordingly in the off position in the pivoting direction in front of the connecting line of the pivot point 5 with the bearing point 19 and only moves in the course of the further pivoting movement to the opposite side.
  • the axis of the push rod 15 or of the blower housing 9 is approximately in the middle and perpendicular to the connecting line of the bearing point 19 and the pivot point 5 on the support arm 2.
  • the elongated hole 21 in the arm 20 of the control lever 18 is designed to be arcuate against the pivoting direction prevailing when it is switched off.
  • the elongated hole 21 can also be rectilinear but inclined with respect to the axis of the arm 17 against the pivoting direction.
  • the elongated hole can also have a further section 23, which runs approximately concentrically to the bearing 19 of the control lever 18. Then, after reaching the off position, the contact arm 4 can be pivoted further without a displacement of the piston 14 into a third switching position in which, for example, an earth contact is closed.
  • the compressed gas switch can also be constructed in such a way that the blower housing 9 is located laterally next to the movable contact arm 4 in an asymmetrical arrangement. Regardless of this, the arrangement is such that the axis 10 of the blower housing 9 and the fulcrum 5 of the contact arm 4 are in alignment. To also here with a small swivel angle between input u.
  • the bearing point 19 is at the end 24 of the support arm 2 which extends from the insulating support 1 and extends beyond the pivot point 5 with respect to the design according to FIG half maximum swivel angle of the contact arm 4 offset downwards.
  • the connecting line between the pivot point 5 and the pin 22 runs perpendicular to the axis 10 of the blower housing 9.
  • the pivot point 16 of the control lever 18 on the push rod 15 lies below the pivot point 5 in this operating point. After a pivoting angle of approximately The pivot point 16 is then approximately 45 ° above the bearing 19 approximately vertically.
  • a drive rod 25 is provided as the drive, which is articulated on the pivotable contact arm 4.
  • the vertical distance between the axis 10 of the blower housing 9 and the bearing point 19 is shorter than between the bearing point 19 and the articulation point 16.
  • the articulation point 16 then lies in the end positions of the contact arm pivot angle on the side of the axis 10 facing the bearing point 19 between the movable contact 4 and the pivot point 5.
  • the articulation point then intersects 16 twice the axis line 10, so that the push rod 15 experiences only a slight deviation from the position of the axis 10 during pivoting.
  • An additional slide bearing and an intermediate link are then not required for the push rod 15.

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  • Circuit Breakers (AREA)

Claims (8)

  1. Interrupteur à gaz comprimé comprenant un contact (7) sur un bras de contact (4) entraîné et monté pivotant, bras qui porte un dispositif de soufflage à piston (9, 13, 14) dont le coffret de soufflage (9) est solidaire du bras de contact (4) et dont le piston (14) est relié à ce dernier par un engrenage à levier (2, 18), comprenant une buse de soufflage (13) dirigée dans la trajectoire de l'arc et partant du coffret de soufflage (9), ainsi qu'un contre-contact fixe (12) qui s'étend dans le sens de pivotement du contact mobile (7), caractérisé en ce que le coffret de soufflage (9) entoure le contact mobile (7) et que la buse de soufflage (13), en partant du contact mobile (7) est orientée, dans le sens de pivotement, vers le contre-contact (12) tout en l'entourant coaxialement en position enclenchée, en ce que le coffret de soufflage (9) est de forme cylindrique dans la zone du piston associé (14) dont l'axe (10) s'étend de façon approximativement parallèle au bras de contact (4), en ce que le bras de contact (4) est monté pivotant sur un pivot (5) fixe d'un bras de support (2) qui présente, à une extrémité (24) tournée en direction du contre-contact fixe (12), un point d'appui (19) pour un levier de commande (18) à deux bras qui est relié, par une extrémité, de manière articulée, à une tige de poussée (15) du piston (14) et dont l'autre bras (20) présente un trou oblong (21) dans lequel s'engage un ergot (22) fixé sur le bras de contact mobile (4).
  2. Interrupteur à gaz comprimé selon la revendication 1, caractérisé en ce que le coffret de soufflage (9) est largement adapté, dans la zone du contact mobile (7), au contour de ce dernier et l'entoure en respectant une distance radiale.
  3. Interrupteur à gaz comprimé selon la revendication 1 ou 2, caractérisé en ce que le bras de contact mobile (4) a une forme en U, une branche (3) étant logée pivotante autour du pivot fixe (5) et l'autre branche (6) portant, à son extrémité libre, le contact (7) et en ce qu'entre les branches (3, 6) est disposé le coffret de soufflage (9) dont l'axe (10) est parallèle au dos (11) reliant les branches (3, 6) du U.
  4. Interrupteur à gaz comprimé selon la revendication 3, caractérisé en ce que la branche rotative (3) est articulée, dans la zone de son extrémité libre, au point de rotation (5) du bras support (2) dont l'extrémité libre est dirigée vers le dos (4.1) reliant les branches (3, 6) du U et présente le point d'appui (19) pour le levier de commande (18) à deux bras et en ce que l'axe de la tige de poussée (15) se trouve à peu près au milieu sur le bras support (2) et perpendiculaire à la ligne de liaison entre le point d'appui (19) et le pivot (5) quand les contacts (7, 12) sont fermés, la distance radiale entre le point d'appui (19) du levier de commande (18) et l'ergot (22) étant plus courte que celle entre le point d'appui et le point d'articulation (16) de la tige de piston (15).
  5. Interrupteur à gaz comprimé selon la revendication 1 ou 2, caractérisé en ce que l'axe (10) du coffret de soufflage (9) et le pivot (5) du bras de contact (4) sont alignés entre eux, et que, quand les contacts (7, 12) sont fermés, la ligne de liaison entre le pivot (5) et l'ergot (22) s'étend perpendiculairement à l'axe (10) du coffret cylindrique (9) et, en revanche, la ligne de liaison entre le pivot (5) et le point d'appui (19) est inclinée vers le bas de la valeur de la moitié de l'angle de pivotement maximal du bras de contact mobile, le point d'articulation (16) du levier de commande (18) sur la tige de poussée (15) se trouvant en dessous du pivot (5).
  6. Interrupteur à gaz comprimé selon la revendication 5, caractérisé en ce que la distance verticale entre l'axe (10) du coffret de soufflage (9) et le point d'appui (19) est plus courte que celle entre le point d'appui (19) et le point d'articulation (16) et en ce que le point d'articulation (16), dans les positions de fin de course de l'angle de pivotement du bras de contact, se trouve sur la face de l'axe (10) tournée vers le point d'appui (19) entre le bras de contact mobile (4) et le pivot (5).
  7. Interrupteur à gaz comprimé selon la revendication 1 ou l'une des suivantes, caractérisé en ce que le trou oblong (21) dans le levier de commande (18) s'étend en formant un arc allant à l'encontre du sens de pivotement lors de l'opération de pivotement pour l'ouverture des contacts.
  8. Interrupteur à gaz comprimé selon la revendication 1 ou l'une des suivantes, caractérisé en ce que le trou oblong (21) présente une section (23) s'étendant approximativement de façon concentrique avec le point d'appui (19) du levier de commande (18).
EP90125330A 1989-12-22 1990-12-22 Interrupteur à gaz comprimé Expired - Lifetime EP0434100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3942568A DE3942568A1 (de) 1989-12-22 1989-12-22 Druckgasschalter
DE3942568 1989-12-22

Publications (3)

Publication Number Publication Date
EP0434100A2 EP0434100A2 (fr) 1991-06-26
EP0434100A3 EP0434100A3 (en) 1992-06-17
EP0434100B1 true EP0434100B1 (fr) 1995-08-02

Family

ID=6396199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125330A Expired - Lifetime EP0434100B1 (fr) 1989-12-22 1990-12-22 Interrupteur à gaz comprimé

Country Status (2)

Country Link
EP (1) EP0434100B1 (fr)
DE (2) DE3942568A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611745B1 (fr) * 2018-08-16 2024-03-20 ABB Schweiz AG Interrupteur-sectionneur basse ou moyenne tension isolé par du gaz

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE714085C (de) * 1940-03-08 1941-11-21 Sachsenwerk Licht & Kraft Ag Fluessigkeitsarmer Loeschkammerschalter
FR1034903A (fr) * 1951-03-30 1953-08-07 Forges Ateliers Const Electr Interrupteurs à auto-soufflage
DE1062789B (de) * 1957-11-23 1959-08-06 Sachsenwerk Licht & Kraft Ag Druckluftblaseinrichtung fuer elektrische Leistungsschalter
DE3743827A1 (de) * 1987-03-11 1988-09-22 Sachsenwerk Ag Lichtbogenloescheinrichtung fuer lastschalter
DE3803117A1 (de) * 1988-02-03 1989-08-17 Sachsenwerk Ag Stromunterbrecher fuer mit einem isoliergas gefuellte, gekapselte schaltanlagen

Also Published As

Publication number Publication date
DE59009473D1 (de) 1995-09-07
DE3942568A1 (de) 1991-06-27
EP0434100A3 (en) 1992-06-17
EP0434100A2 (fr) 1991-06-26

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