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EP0811998B1 - Gas blast switch with a braking device - Google Patents

Gas blast switch with a braking device Download PDF

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Publication number
EP0811998B1
EP0811998B1 EP96108917A EP96108917A EP0811998B1 EP 0811998 B1 EP0811998 B1 EP 0811998B1 EP 96108917 A EP96108917 A EP 96108917A EP 96108917 A EP96108917 A EP 96108917A EP 0811998 B1 EP0811998 B1 EP 0811998B1
Authority
EP
European Patent Office
Prior art keywords
switch
drive rod
circuit breaker
gas
raceway
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
EP96108917A
Other languages
German (de)
French (fr)
Other versions
EP0811998A1 (en
Inventor
Jürg Burri
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.)
General Electric Switzerland GmbH
Original Assignee
Alstom 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 Alstom AG filed Critical Alstom AG
Priority to DE59609837T priority Critical patent/DE59609837D1/en
Priority to EP96108917A priority patent/EP0811998B1/en
Priority to AT96108917T priority patent/ATE227047T1/en
Priority to US08/867,881 priority patent/US5920051A/en
Publication of EP0811998A1 publication Critical patent/EP0811998A1/en
Application granted granted Critical
Publication of EP0811998B1 publication Critical patent/EP0811998B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/60Mechanical arrangements for preventing or damping vibration or shock
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88Switches 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
    • H01H33/90Switches 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
    • H01H33/91Switches 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3084Kinetic energy of moving parts recuperated by transformation into potential energy in closing or opening spring to be used in next operation

Definitions

  • the invention relates to a gas pressure switch, in particular for high voltage, with a fixed contact element and a moving one that interacts with it Contact element, one with the movable contact element a drive rod connecting drive, and a stop braking device for braking a switch-off movement the drive rod.
  • a gas pressure switch of this type is from the unpublished European Patent application EP-A 0780859 known. It deals is a so-called blow piston switch, which in the final phase of a switch-off process Blow piston is moved with a blow cylinder. While against pressure gas switches with a stationary blowing piston the end of a switch-off stroke in the piston-cylinder system residual gas forms a gas cushion that supports the braking of the moving masses Blow piston switches of the type mentioned the residual gas contribute to braking the moving masses. That's why in the pressure gas switch according to EP-A 0780859 a pneumatic cut-out brake assembly used.
  • the stop brake assembly contains a brake piston loosely arranged on the drive rod, the one in the end section of the switch-off stroke Stop is taken. These brakes have a low one Height and are therefore for installation in the tight available space in the control chamber suitable. Their disadvantage is that they are extremely tight tolerances have to be manufactured, and that the energy converted into heat when braking no longer available for a subsequent switch-on process stands.
  • the present invention is based on the object a gas pressure switch, especially for high voltage, with a stop brake device to create where the Braking energy at least in part for the start-up process can be recovered, and the stop braking device are manufactured without adhering to narrow tolerances can.
  • the pressure gas switch according to the invention is at Braking the drive rod and the one moving with it Switch parts a part of the kinetic energy into potential Energy from existing in the switch-off braking device Feathers converted; this potential energy becomes an additional acceleration of the drive rod and the switch parts moving with it during the switch-on process exploited. It is particularly advantageous that the switch-off braking device neither on to be monitored and refilled in addition to the insulating gas Medium still contains abrasion-producing parts.
  • a gas pressure switch 1 has one of one Interrupter isolator 2 limited interrupter 3. Above and below is the interrupter isolator 2, each with a connection flange 4, 5 connected. The upper connection flange 4 is connected to a fixed contact element 6, that a burn-off contact piece 7 and a continuous current contact piece 8 has. With the fixed erosion contact 7 acts a movable contact element 10 together.
  • the pressure gas switch 1 is as a blow piston switch educated; a provided with a blowing nozzle 12 with the movable contact element 10 also axially Movable blow cylinder is only symbolically shown in Fig. 1 and designated by 13; it works in the on position the switch with the continuous current contact piece 8 together.
  • the structure and mode of operation of the blow piston switch is, for example, in the unpublished European ones Patent applications EP-A 0689218 and EP-A 0780859 in detail described; express reference is made to these.
  • the axial movement of the movable contact element 10, the blow cylinder 13 and a dashed line Blow piston 14 from a switch-on position in which the movable contact element 10 in contact with the is fixed contact element 6, in a in Fig. 1st Switch-off position shown takes place via a drive rod 15, which passes through the lower connecting flange 5 and hinged to an actuating rod 16 made of insulating material that is inside a post insulator assembly 17 runs.
  • the operating rod 16 is not one Mechanism shown in more detail, arranged in a housing 18 19 connected to a drive 20.
  • an insulating gas preferably SF6, under a certain pressure relative to the environment.
  • Fig. 2 shows the lower end region of the interrupter isolator 2, which by means of a mounting flange 23 with the Connection flange 5 is connected.
  • the mounting flange 23 is screwed to the connecting flange 5, which in Fig.2 is not shown.
  • the connection flange 5 is also screwed to a further fastening flange 24, via which the attachment to the post insulator 25 the post insulator assembly 17.
  • the interrupter isolator 2 is with the mounting flange 23 and Post insulator 25 with the further fastening flange 24 firmly connected by means of a cement.
  • the inside of the Post insulator arrangement 17 and also the switching chamber 3 are in the area of the connection flange 5 via seals 26, 27 sealed to the outside.
  • the connecting flange 5 points upwards projecting into the interior of the switching chamber 3, sleeve-shaped Part 30, which is provided with a transverse wall 31 and with its upper end region, not shown, for Support or for storage of the blow piston 14 is used.
  • Fig. 3 is the transverse wall 31 for clarity because omitted.
  • the transverse wall 31 is designed that the axially movable drive rod 15 unhindered can take hold.
  • the connecting flange 5 In the transverse wall 31 on the one hand and in a lower, inner one Paragraph 32 of the connecting flange 5 are four guide rods 35, 36, 37, 38 attached. There are two guide rods each 35, 36 and 37, 38 symmetrical to an axial plane A (Fig. 3) arranged in which also in the vertical Direction of the switch axis y lies, whereby the axes of the respective guide rods 35, 36, 37, 38 form an acute angle a with the axial plane A, as shown in Fig. 2.
  • the pairs of guide rods 35, 36 and 37, 38 are each parallel to the switch axis y Level B, B ', the same distance b from the Pressure switch axis y are arranged.
  • roller bearing 41, 42 On each side of the axial plane A. Guide rods 35, 37 and 36, 38 is a roller bearing 41, 42 slidably arranged. Each roller bearing 41, 42 carries centered between the guide rods 35, 37 and 36, 38 a freely rotatably mounted roller 43 or 44, the Rollers 43, 44 are intended to be arranged centrally Drive rod 15 cooperate, as below is described in more detail.
  • Each guide rod 35, 36, 37, and 38 is coaxially one Assigned spring 47, the one on the corresponding Roller bearings 41 and 42 and on the other hand on paragraph 32 of the connecting flange 5 is supported.
  • the springs 47 are preferred as one or more concentrically arranged Coil spring or designed as a plate spring pack.
  • the drive rod 15 is in its lower, the stop braking device 22 sweeping area backdrop formed and arranged symmetrically to the axial plane A.
  • career paths each with an upper, to Switch axis y parallel, contact-side track section 49, a lower one, also to the switch axis y parallel, drive-side raceway section 48 and one intermediate, sloping connecting section 50 include.
  • the two upper career sections 49 are at a greater distance from the switch axis y, as the lower race sections 48.
  • the drive rod In the switched-on position of the compressed gas switch 1, in which the movable contact element 10 with the fixed Contact element 6 cooperates, the drive rod is 15 in its uppermost position. Lying there the rollers 43 - the right half of Figure 2 corresponding - On the lower race sections 48 of the drive rod 15 on. The springs 47 are at least partially relaxed.
  • the drive 20 now initiates the switch-off process, so the drive rod 16 via the actuating rod 15 and with this the movable contact element 10 and the blowing cylinder 13 is accelerated downwards with the blowing nozzle 12.
  • the switch-off braking device 22 allows this movement, from the minimal rolling friction losses between the rollers 43, 44 and the raceway sections 48 apart from no braking effect until the connecting sections 50 in cooperation with the rollers 43, 44 come. From this moment on, the connecting sections 50 from the drive rod 15 a force exerted on the rollers 43, 44, one on both sides Component of this force overcoming the rollers 43, 44 the force of the springs 47 apart.
  • the guide rods 35, 36, 37 and 38 result an inexpensive, compact for installation in the pressure switch 1 Form of the switch-off braking device 22.
  • the Springs 47 a long effective stroke.
  • switch-off braking device would be provided in particular for blow piston switches an application with conventional pressure gas switches with fixed blowing piston also possible.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Braking Arrangements (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The high-voltage gas-operated isolating switch has an in-line assembly with the gas stage coupled to a drive rod Ä5Ü. The rod passes through a bush shaped section Ä30Ü and within this are two pairs of guide bars that are set at angles, each of which have roller bearings Ä41,43Ü. The rollers move on the guide bars against spring elements Ä47Ü. The drive rod has a profiled track surface Ä49Ü that operates against the rollers and the springs provide a retarding (braking) action.

Description

Die Erfindung betrifft einen Druckgasschalter, insbesondere für Hochspannung, mit einem feststehenden Kontaktelement und einem mit diesem zusammenwirkenden beweglichen Kontaktelement, einer das bewegliche Kontaktelement mit einem Antrieb verbindenden Antriebsstange, und einer Ausschalt-Bremsvorrichtung zum Bremsen einer Ausschaltbewegung der Antriebsstange.The invention relates to a gas pressure switch, in particular for high voltage, with a fixed contact element and a moving one that interacts with it Contact element, one with the movable contact element a drive rod connecting drive, and a stop braking device for braking a switch-off movement the drive rod.

Ein Druckgasschalter dieser Art ist aus der nicht vorveröffentlichten europäischen Patentanmeldung EP-A 0780859 bekannt. Es handelt sich dabei um einen sogenannten Blaskolbenschalter, bei dem in der Schlussphase eines Ausschaltvorganges ein Blaskolben mit einem Blaszylinder mitbewegt wird. Während bei Druckgasschaltern mit stillstehendem Blaskolben gegen das Ende eines Ausschlalthubes das sich im Kolben-Zylinder-System befindende Restgas ein Gaskissen bildet, das die Abbremsung der bewegten Massen unterstützt, kann bei Blaskolbenschaltern der genannten Art das Restgas nicht zum Abbremsen der bewegten Massen beitragen. Deswegen wird bei dem Druckgasschalter gemäss der EP-A 0780859 eine pneumatische Ausschalt-Bremsanordnung eingesetzt. Die Ausschalt-Bremsanordnung enthält einen lose auf der Antriebsstange angeordneten Bremskolben, der im Endabschnitt des Ausschalthubes durch einen Anschlag mitgenommen wird. Diese Bremsen haben eine geringe Bauhöhe und sind deshalb für den Einbau in den knappen zur Verfügung stehenden Raum in der Schaltkammer bestens geeignet. Ihr Nachteil besteht darin, dass sie mit äusserst engen Toleranzen gefertigt werden müssen, und dass die beim Bremsen in Wärme umgesetzte Energie nicht mehr für einen nachfolgenden Einschaltvorgang zur Verfügung steht.A gas pressure switch of this type is from the unpublished European Patent application EP-A 0780859 known. It deals is a so-called blow piston switch, which in the final phase of a switch-off process Blow piston is moved with a blow cylinder. While against pressure gas switches with a stationary blowing piston the end of a switch-off stroke in the piston-cylinder system residual gas forms a gas cushion that supports the braking of the moving masses Blow piston switches of the type mentioned the residual gas contribute to braking the moving masses. That's why in the pressure gas switch according to EP-A 0780859 a pneumatic cut-out brake assembly used. The stop brake assembly contains a brake piston loosely arranged on the drive rod, the one in the end section of the switch-off stroke Stop is taken. These brakes have a low one Height and are therefore for installation in the tight available space in the control chamber suitable. Their disadvantage is that they are extremely tight tolerances have to be manufactured, and that the energy converted into heat when braking no longer available for a subsequent switch-on process stands.

Aus DE-C-32 15 243 ist die Verwendung einer hydraulischen Bremse für einen Druckgasschalter bekannt. Wegen der hohen Zähigkeit des Strömungsmediems sind die Anforderungen an die Toleranzen bei der Fertigung einer hydraulischen Bremse geringer als bei einer pneumatischen Bremse. Diese Lösung ist jedoch mit dem Nachteil verbunden, dass neben Isoliergas ein weiteres Medium, nämlich die Hydraulikflüssigkeit, überwacht werden muss, und dies an einem schwer zugänglichen Ort. Auch bei einer hydraulischen Bremse ist die Bremsenergie nach einer Ausschaltung verloren.From DE-C-32 15 243 is the use of a hydraulic Brake known for a gas pressure switch. Because of the high Toughness of the flow medium are the requirements the tolerances in the manufacture of a hydraulic brake less than with a pneumatic brake. This solution is associated with the disadvantage that in addition to Insulating gas another medium, namely the hydraulic fluid, must be monitored, and this on one difficult to access place. Even with a hydraulic one Brake energy is lost after switching off.

Aus DE-A-41 16 314 ist schliesslich eine Bremse auf der Basis von Reibung bekannt. Auch diese Bremse ist für einen Druckgasschalter ungeeignet, weil Reibung einen Abrieb zur Folge hat, d.h. feines, gegebenenfalls metallisches Pulver, das die Isolationsfähigkeit des Isoliergases beeinträchtigen kann. Weiter ist wie bei pneumatischen und hydraulischen Bremsen Bremsen die Bremsenergie nach einer Ausschaltung verloren.From DE-A-41 16 314 there is finally a brake on the Known basis of friction. This brake is also for you Compressed gas switch unsuitable because of friction Consequence, i.e. fine, possibly metallic powder, that impair the insulating ability of the insulating gas can. Next is like pneumatic and hydraulic Braking Brakes the braking energy after switching off lost.

Aus der DE-B 1045511, die den nächstkommenden Stand der Technik beschreibt, ist ein Druckgasschalter mit einem feststehenden Kontaktelement und einem mit diesem zusammenwirkenden, kolbenartigen beweglichen Kontaktelement bekannt, das durch Druckluftzufuhr entweder in eine Einschaltstellung oder in eine Ausschaltstellung gebracht wird. Zur Dämpfung der Bewegung des beweglichen Kontaktelements dient eine Ringfeder.From DE-B 1045511, which describes the closest prior art is a gas pressure switch with a fixed contact element and one with this interacting, piston-like movable contact element known that by supplying compressed air either in an on position or in an off position brought. To dampen the movement of the movable A ring spring is used for the contact element.

Aus der US 2,233,605 ist eine Unterbrechereinrichtung für elektrische Schalter mit einem mit hoher Geschwindigkeit beweglichen Kontaktelement bekannt. Zum Bremsen des Kontaktelements sind zwei Kontaktrollen über Federn gegen das Kontaktelement verspannt, das über seine Länge unterschiedliche Dicke hat.From US 2,233,605 an interrupter device for electrical switches with a high speed movable contact element known. To brake the Contact element are two contact rollers against springs against the contact element clamped, which is different over its length Has thickness.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Druckgasschalter, insbesondere für Hochspannung, mit einer Ausschalt-Bremsvorrichtung zu schaffen, bei dem die Bremsenergie wenigstens zum Teil für den Einschaltvorgang zurückgewonnen werden kann, und die Ausschalt-Bremsvorrichtung ohne Einhaltung enger Toleranzen gefertigt werden kann.The present invention is based on the object a gas pressure switch, especially for high voltage, with a stop brake device to create where the Braking energy at least in part for the start-up process can be recovered, and the stop braking device are manufactured without adhering to narrow tolerances can.

Diese Aufgabe wird erfindungsgemäss durch die im Anspruch 1 angegebenen Merkmale gelöst.This object is achieved according to the invention 1 specified features solved.

Beim erfindungsgemässen Druckgasschalter wird beim Abbremsen der Antriebsstange und der mit ihr bewegten Schalterteile ein Teil der kinetischen Energie in potentielle Energie von in der Ausschalt-Bremsvorrichtung vorhandenen Federn umgewandelt; diese potentielle Energie wird zur zusätzlichen Beschleunigung der Antriebsstange und der mit ihr bewegten Schalterteile beim Einschaltvorgang ausgenützt. Es ist dabei von besonderem Vorteil, dass die Ausschalt-Bremsvorrichtung weder ein zusätzlich zum Isoliergas zu überwachendes und nachzufüllendes Medium noch Abrieb erzeugende Teile enthält.In the pressure gas switch according to the invention is at Braking the drive rod and the one moving with it Switch parts a part of the kinetic energy into potential Energy from existing in the switch-off braking device Feathers converted; this potential energy becomes an additional acceleration of the drive rod and the switch parts moving with it during the switch-on process exploited. It is particularly advantageous that the switch-off braking device neither on to be monitored and refilled in addition to the insulating gas Medium still contains abrasion-producing parts.

Bevorzugte Ausgestaltungen des erfindungsgemässen Druckgasschalters sind in den abhängigen Ansprüchen definiert.Preferred configurations of the compressed gas switch according to the invention are defined in the dependent claims.

Ein Ausführungsbeispiel des erfindungsgemässen Druckgasschalters ist in der Zeichnung dargestellt und im folgenden näher beschrieben.An embodiment of the pressure gas switch according to the invention is shown in the drawing and below described in more detail.

Es zeigen:

Fig. 1
schematisch einen Druckgasschalter in Ansicht und teilweise im Schnitt, mit einer integrierten Ausschalt-Bremsvorrichtung;
Fig. 2
gegenüber Fig. 1 vergrössert einen Teil des Druckgasschalters mit der Ausschalt-Bremsvorrichtung im Längsschnitt, wobei die linke Hälfte der Ausschaltstellung des Druckgasschalters und die rechte Hälfte der Einschaltstellung entspricht; und
Fig. 3
einen Teil der Ausschalt-Bremsvorrichtung nach Fig. 2 in Draufsicht und teilweise im Schnitt in der Einschaltstellung.
Show it:
Fig. 1
schematically a pressure gas switch in view and partially in section, with an integrated switch-off braking device;
Fig. 2
Compared to FIG. 1, part of the pressure gas switch with the switch-off braking device is enlarged in a longitudinal section, the left half corresponding to the switch-off position of the pressure gas switch and the right half to the switch-on position; and
Fig. 3
part of the switch-off braking device according to FIG. 2 in plan view and partly in section in the switched-on position.

Gemäss Fig. 1 weist ein Druckgasschalter 1 eine von einem Schaltkammerisolator 2 begrenzte Schaltkammer 3 auf. Oben und unten ist der Schaltkammerisolator 2 mit je einem Anschlussflansch 4, 5 verbunden. Der obere Anschlussflansch 4 steht mit einem feststehenden Kontaktelement 6 in Verbindung, das ein Abbrandkontaktstück 7 sowie ein Dauerstromkontaktstück 8 aufweist. Mit dem feststehenden Abbrandkontaktstück 7 wirkt ein bewegliches Kontaktelement 10 zusammen. Der Druckgasschalter 1 ist als Blaskolbenschalter ausgebildet; ein mit einer Blasdüse 12 versehener, mit dem beweglichen Kontaktelement 10 ebenfalls axial bewegbarer Blaszylinder ist in Fig. 1 nur symbolisch dargestellt und mit 13 bezeichnet; er wirkt in Einschaltstellung des Schalters mit dem Dauerstromkontaktstück 8 zusammen. Der Aufbau und die Funktionsweise des Blaskolbenschalters ist beispielsweise in den nicht vorveröffentlichten europäischen Patentanmeldungen EP-A 0689218 und EP-A 0780859 ausführlich beschrieben; es wird ausdrücklich auf diese verwiesen. Die Axialbewegung des beweglichen Kontaktelements 10, des Blaszylinders 13 und eines gestrichelt angedeuteten Blaskolbens 14 aus einer Einschaltstellung, in der sich das bewegliche Kontaktelement 10 im Kontakt mit dem feststehenden Kontaktelement 6 befindet, in eine in Fig. 1 dargestellte Ausschaltstellung erfolgt über eine Antriebsstange 15, die den unteren Anschlussflansch 5 durchgreift und an eine Betätigungsstange 16 aus Isoliermaterial angelenkt ist, die im Innern einer Stützisolatoranordnung 17 verläuft. Die Betätigungsstange 16 ist über einen nicht näher dargestellten, in einem Gehäuse 18 angeordneten Mechanismus 19 mit einem Antrieb 20 verbunden.1, a gas pressure switch 1 has one of one Interrupter isolator 2 limited interrupter 3. Above and below is the interrupter isolator 2, each with a connection flange 4, 5 connected. The upper connection flange 4 is connected to a fixed contact element 6, that a burn-off contact piece 7 and a continuous current contact piece 8 has. With the fixed erosion contact 7 acts a movable contact element 10 together. The pressure gas switch 1 is as a blow piston switch educated; a provided with a blowing nozzle 12 with the movable contact element 10 also axially Movable blow cylinder is only symbolically shown in Fig. 1 and designated by 13; it works in the on position the switch with the continuous current contact piece 8 together. The structure and mode of operation of the blow piston switch is, for example, in the unpublished European ones Patent applications EP-A 0689218 and EP-A 0780859 in detail described; express reference is made to these. The axial movement of the movable contact element 10, the blow cylinder 13 and a dashed line Blow piston 14 from a switch-on position in which the movable contact element 10 in contact with the is fixed contact element 6, in a in Fig. 1st Switch-off position shown takes place via a drive rod 15, which passes through the lower connecting flange 5 and hinged to an actuating rod 16 made of insulating material that is inside a post insulator assembly 17 runs. The operating rod 16 is not one Mechanism shown in more detail, arranged in a housing 18 19 connected to a drive 20.

Im Innern der Schaltkammer 3 und der Stützisolatoranordnung 17 befindet sich ein Isoliergas, vorzugsweise SF6, unter einem bestimmten Überdruck gegenüber der Umgebung.Inside the switching chamber 3 and the support insulator arrangement 17 there is an insulating gas, preferably SF6, under a certain pressure relative to the environment.

In der Schaltkammer 3 ist beim unteren Anschlussflansch 5 eine Ausschalt-Bremsvorrichtung 22 angeordnet, die nun anhand der Fig. 2 und 3 beschrieben wird.In the switching chamber 3 there is 5 at the lower connection flange a switch-off braking device 22 is arranged, which is now based on 2 and 3 is described.

Fig. 2 zeigt den unteren Endbereich des Schaltkammerisolators 2, der mittels eines Befestigungsflansches 23 mit dem Anschlussflansch 5 verbunden ist. Der Befestigungsflansch 23 ist mit dem Anschlussflansch 5 verschraubt, was in Fig.2 nicht näher dargestellt ist. Der Anschlussflansch 5 ist ferner mit einem weiteren Befestigungsflansch 24 verschraubt, über welchen die Befestigung am Stützisolator 25 der Stützisolatoranordnung 17 erfolgt. Der Schaltkammerisolator 2 ist mit dem Befestigungsflansch 23 und der Stützisolator 25 mit dem weiteren Befestigungsflansch 24 mittels einer Verkittung fest verbunden. Das Innere der Stützisolatoranordnung 17 sowie auch die Schaltkammer 3 sind im Bereich des Anschlussflansches 5 über Dichtungen 26, 27 nach aussen abgedichtet.Fig. 2 shows the lower end region of the interrupter isolator 2, which by means of a mounting flange 23 with the Connection flange 5 is connected. The mounting flange 23 is screwed to the connecting flange 5, which in Fig.2 is not shown. The connection flange 5 is also screwed to a further fastening flange 24, via which the attachment to the post insulator 25 the post insulator assembly 17. The interrupter isolator 2 is with the mounting flange 23 and Post insulator 25 with the further fastening flange 24 firmly connected by means of a cement. The inside of the Post insulator arrangement 17 and also the switching chamber 3 are in the area of the connection flange 5 via seals 26, 27 sealed to the outside.

Der Anschlussflansch 5 weist gemäss Fig. 2 einen nach oben ins Innere der Schaltkammer 3 hineinragenden, hülsenförmigen Teil 30 auf, der mit einer Querwand 31 versehen ist und mit seinem nicht gezeigten, oberen Endbereich zum Stützen bzw. zur Lagerung des Blaskolbens 14 dient. In Fig. 3 ist die Querwand 31 der besseren Übersichtlichkeit wegen weggelassen. Die Querwand 31 ist so ausgestaltet, dass die axialbewegliche Antriebsstange 15 ungehindert durchgreifen kann.According to FIG. 2, the connecting flange 5 points upwards projecting into the interior of the switching chamber 3, sleeve-shaped Part 30, which is provided with a transverse wall 31 and with its upper end region, not shown, for Support or for storage of the blow piston 14 is used. In Fig. 3 is the transverse wall 31 for clarity because omitted. The transverse wall 31 is designed that the axially movable drive rod 15 unhindered can take hold.

In der Querwand 31 einerseits und in einem unteren, inneren Absatz 32 des Anschlussflansches 5 sind vier Führungsstangen 35, 36, 37, 38 befestigt. Dabei sind je zwei Führungsstangen 35, 36 und 37, 38 symetrisch zu einer Axialebene A (Fig. 3) angeordnet, in welcher auch die in vertikaler Richtung verlaufende Schalterachse y liegt, wobei die Achsen der jeweiligen Führungsstange 35, 36, 37, 38 einen spitzen Winkel a mit der Axialebene A einschliessen, wie aus Fig. 2 ersichtlich. Die Führungsstangenpaare 35, 36 und 37, 38 liegen in je einer zur Schalterachse y parallelen Ebene B, B', die im gleichen Abstand b von der Druckschalterachse y angeordnet sind.In the transverse wall 31 on the one hand and in a lower, inner one Paragraph 32 of the connecting flange 5 are four guide rods 35, 36, 37, 38 attached. There are two guide rods each 35, 36 and 37, 38 symmetrical to an axial plane A (Fig. 3) arranged in which also in the vertical Direction of the switch axis y lies, whereby the axes of the respective guide rods 35, 36, 37, 38 form an acute angle a with the axial plane A, as shown in Fig. 2. The pairs of guide rods 35, 36 and 37, 38 are each parallel to the switch axis y Level B, B ', the same distance b from the Pressure switch axis y are arranged.

Auf den jeweils zu einer Seite der Axialebene A liegenden Führungsstangen 35, 37 bzw. 36, 38 ist ein Rollenlager 41, 42 verschiebbar angeordnet. Jedes Rollenlager 41, 42 trägt mittig zwischen den Führungsstangen 35, 37 bzw. 36, 38 eine frei drehbar gelagerte Rolle 43 bzw. 44, wobei die Rollen 43, 44 dazu bestimmt sind, mit der zentral angeordneten Antriebsstange 15 zusammenzuwirken, wie weiter unten näher beschrieben wird.On each side of the axial plane A. Guide rods 35, 37 and 36, 38 is a roller bearing 41, 42 slidably arranged. Each roller bearing 41, 42 carries centered between the guide rods 35, 37 and 36, 38 a freely rotatably mounted roller 43 or 44, the Rollers 43, 44 are intended to be arranged centrally Drive rod 15 cooperate, as below is described in more detail.

Jeder Führungsstange 35, 36, 37, und 38 ist koaxial eine Feder 47 zugeordnet, die einerseits am entsprechenden Rollenlager 41 bzw. 42 und anderseits am Absatz 32 des Anschlussflansches 5 abgestützt ist. Die Federn 47 sind vorzugsweise als eine oder mehrere konzentrisch angeordnete Spiralfeder oder als Tellerfederpakete ausgebildet.Each guide rod 35, 36, 37, and 38 is coaxially one Assigned spring 47, the one on the corresponding Roller bearings 41 and 42 and on the other hand on paragraph 32 of the connecting flange 5 is supported. The springs 47 are preferred as one or more concentrically arranged Coil spring or designed as a plate spring pack.

Die Antriebsstange 15 ist in ihrem unteren, die Ausschalt-Bremsvorrichtung 22 durchgreifenden Bereich kulissenartig ausgebildet und weist symmetrisch zur Axialebene A angeordnete Laufbahnen auf, die jeweils einen oberen, zur Schalterachse y parallelen, kontaktseitigen Laufbahnabschnitt 49, einen unteren, ebenfalls zur Schalterachse y parallelen, antriebseitigen Laufbahnabschnitt 48 und einen dazwischenliegenden, schräg verlaufenden Verbindungsabschnitt 50 umfassen. Die beiden oberen Laufbahnabschnitte 49 liegen in einem grösseren Abstand von der Schalterachse y, als die unteren Laufbahnabschnitte 48.The drive rod 15 is in its lower, the stop braking device 22 sweeping area backdrop formed and arranged symmetrically to the axial plane A. Career paths, each with an upper, to Switch axis y parallel, contact-side track section 49, a lower one, also to the switch axis y parallel, drive-side raceway section 48 and one intermediate, sloping connecting section 50 include. The two upper career sections 49 are at a greater distance from the switch axis y, as the lower race sections 48.

Aus dem beschriebenen Aufbau ergibt sich folgende Funktionsweise;The following mode of operation results from the structure described;

In der Einschaltstellung des Druckgasschalters 1, in welcher das bewegliche Kontaktelement 10 mit dem feststehenden Kontaktelement 6 zusammenwirkt, befindet sich die Antriebsstange 15 in ihrer obersten Stellung. Dabei liegen die Rollen 43 - der rechten Hälfte der Fig.2 entsprechend - an den unteren Laufbahnabschnitten 48 der Antriebsstange 15 an. Die Federn 47 sind wenigstens teilweise entspannt.In the switched-on position of the compressed gas switch 1, in which the movable contact element 10 with the fixed Contact element 6 cooperates, the drive rod is 15 in its uppermost position. Lying there the rollers 43 - the right half of Figure 2 corresponding - On the lower race sections 48 of the drive rod 15 on. The springs 47 are at least partially relaxed.

Wird nun vom Antrieb 20 der Ausschaltvorgang eingeleitet, so wird über die Betätigungsstange 16 die Antriebsstange 15 und mit dieser das bewegliche Kontaktelement 10 sowie der Blaszylinder 13 mit der Blasdüse 12 nach unten beschleunigt. Die Ausschalt- Bremsvorrichtung 22 erlaubt diese Bewegung, von den minimalen Rollreibungsverlusten zwischen den Rollen 43, 44 und den Laufbahnabschnitten 48 abgesehen, ohne Bremswirkung, bis die Verbindungsabschnitte 50 mit den Rollen 43, 44 in Zusammenwirkung kommen. Von diesem Augenblick an wird über die Verbindungsabschnitte 50 von der Antriebsstange 15 eine Kraft auf die Rollen 43, 44 ausgeübt, wobei beidseitig eine Komponente dieser Kraft die Rollen 43, 44 unter Überwindung der Kraft der Federn 47 auseinanderdrückt. Ein Teil der kinetischen Energie der bewegten Masse wird in potentielle Energie der Federn 47 umgewandelt, die Antriebsstange 15 und die mit ihr bewegten Schalterteile werden somit zum gewünschten Zeitpunkt abgebremst. Sobald die oberen, zur Antriebsstange 15 parallelen Laufbahnabschnitte 49 mit den Rollen 43, 44 zusammenwirken, ist der Bremsvorgang abgeschlossen, und die Federn 47 üben wiederum nur eine minimale, der Rollreibung zwischen den Rollen 43, 44 und den Laufbahnabschnitten 49 entsprechende Kraft auf die Antriebsstange 15 aus. Die potentielle Energie der Federn 47 bleibt jedoch erhalten, da die durch die Laufbahnabschnitte 49 auseinander gedrückten Rollen 43, 44 die Entspannung der Federn 47 verunmöglichen.If the drive 20 now initiates the switch-off process, so the drive rod 16 via the actuating rod 15 and with this the movable contact element 10 and the blowing cylinder 13 is accelerated downwards with the blowing nozzle 12. The switch-off braking device 22 allows this movement, from the minimal rolling friction losses between the rollers 43, 44 and the raceway sections 48 apart from no braking effect until the connecting sections 50 in cooperation with the rollers 43, 44 come. From this moment on, the connecting sections 50 from the drive rod 15 a force exerted on the rollers 43, 44, one on both sides Component of this force overcoming the rollers 43, 44 the force of the springs 47 apart. A part The kinetic energy of the moving mass is converted into potential Energy of springs 47 converted to the drive rod 15 and the switch parts moved with it thus slowed down at the desired time. As soon as the upper raceway sections parallel to the drive rod 15 49 cooperate with the rollers 43, 44 is the Braking is completed and the springs 47 in turn practice minimal, the rolling friction between the rollers 43, 44 and the track sections 49 corresponding force on the drive rod 15. The potential energy of the Springs 47 is retained, however, because of the track sections 49 apart rollers 43, 44 die Make it impossible for springs 47 to relax.

Wird nun vom Antrieb 20 der Einschaltvorgang eingeleitet und die Antriebsstange 15 nach oben bewegt, so wird in dem Augenblick, in welchem die Verbindungsabschnitte 50 die Rollen 43, 44 erreichen und von diesen untergriffen werden die potentielle Energie der Federn 47 freigegeben, und die sich nun entspannenden Federn 47 beschleunigen mit ihrer Kraft bzw. der vertikalen Komponente derselben die Einschaltbewegung der Antriebsstange 15, bis wiederum die unteren Laufbahnabschnitte 48 mit den Rollen 43, 44 zusammenwirken. Now the drive 20 initiates the switch-on process and the drive rod 15 moves up, so in the Moment when the connecting portions 50 die Roles 43, 44 reach and are affected by them the potential energy of the springs 47 released, and the now relaxing springs 47 accelerate with their Force or the vertical component of the same the switch-on movement the drive rod 15 until in turn cooperate lower race sections 48 with the rollers 43, 44.

Durch die Wahl eines spitzen Winkels a für die Schrägstellung der Führungsstangen 35, 36, 37 und 38 ergibt sich eine für den Einbau im Druckschalter 1 günstige, kompakte Form der Auschalt-Bremsvorrichtung 22. Zudem erhalten die Federn 47 einen möglichst langen Wirkhub.By choosing an acute angle a for the inclination the guide rods 35, 36, 37 and 38 result an inexpensive, compact for installation in the pressure switch 1 Form of the switch-off braking device 22. In addition, the Springs 47 a long effective stroke.

Durch geeignetes Formen der Verbindungsabschnitte 50 kann der Brems- und Beschleunigungsvorgang der Antriebsstange 15 in gewünschter Weise beeinflusst werden.By appropriately shaping the connecting portions 50 the braking and acceleration process of the drive rod 15 can be influenced in the desired manner.

Obwohl die erfindungsgemässe Ausschalt-Bremsvorrichtung insbesondere für Blaskolbenschalter vorgesehen ist, wäre eine Anwendung bei konventionellen Druckgasschaltern mit feststehendem Blaskolben ebenfalls durchaus möglich.Although the switch-off braking device according to the invention would be provided in particular for blow piston switches an application with conventional pressure gas switches with fixed blowing piston also possible.

Claims (4)

  1. Gas-blast circuit breaker, in particular for high voltage, having a stationary contact element (6) and a moving contact element (10) which interacts with it, having a drive rod (15) which connects the moving contact element (10) to a drive (20), having a disconnection braking apparatus (22) for braking a disconnection movement of the drive rod (15) and which comprises a raceway (48, 49, 50), which is associated with the drive rod (15), as well as a roller (43 or 44, respectively), which interacts with the raceway (48, 49, 50) and is guided such that it can be moved against the force of a spring (47), with the raceway (48, 49, 50) having two raceway sections (48, 49) which are arranged parallel to the circuit breaker axis (y) and one behind the other, of which the raceway section (49) on the contact side is further away from the circuit breaker axis (y) than the raceway section (48) on the drive side, and the two raceway sections (48, 49) being connected to one another via a connecting section (50) which, during the disconnection movement of the drive rod (15), forces the roller (43 or 44, respectively) back against the force of the spring (47) while at the same time exerting a braking force on the drive rod (15), with the roller (43 or 44, respectively) being guided on a guide rod such that it can be moved, which guide rod is arranged at an acute angle (a) to the circuit breaker axis (y).
  2. Gas-blast circuit breaker according to claim 1, characterized in that the spring (47) is guided by the guide rod.
  3. Gas-blast circuit breaker according to one of claims 1 or 2, characterized in that two raceways (48, 49, 50) are arranged symmetrically with respect to the circuit breaker axis (y).
  4. Gas-blast circuit breaker according to claim 3, characterized in that the rollers (43, 44) which are associated with the two raceways (48, 49, 50) are mounted such that they can rotate on in each case one roller bearing (41, 42), with each roller bearing (41, 42) being arranged on two parallel guide rods (35, 37 and 36, 38, respectively) such that it can be moved against the force of springs (47) which are arranged coaxially with respect to the guide rods.
EP96108917A 1996-06-04 1996-06-04 Gas blast switch with a braking device Expired - Lifetime EP0811998B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59609837T DE59609837D1 (en) 1996-06-04 1996-06-04 Compressed gas switch with a switch-off braking device
EP96108917A EP0811998B1 (en) 1996-06-04 1996-06-04 Gas blast switch with a braking device
AT96108917T ATE227047T1 (en) 1996-06-04 1996-06-04 COMPRESSED GAS SWITCH WITH A TURN-OFF BRAKE DEVICE
US08/867,881 US5920051A (en) 1996-06-04 1997-06-03 Compressed-gas cutout having a disconnecting braking structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96108917A EP0811998B1 (en) 1996-06-04 1996-06-04 Gas blast switch with a braking device

Publications (2)

Publication Number Publication Date
EP0811998A1 EP0811998A1 (en) 1997-12-10
EP0811998B1 true EP0811998B1 (en) 2002-10-30

Family

ID=8222844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108917A Expired - Lifetime EP0811998B1 (en) 1996-06-04 1996-06-04 Gas blast switch with a braking device

Country Status (4)

Country Link
US (1) US5920051A (en)
EP (1) EP0811998B1 (en)
AT (1) ATE227047T1 (en)
DE (1) DE59609837D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11069495B2 (en) * 2019-01-25 2021-07-20 Eaton Intelligent Power Limited Vacuum switching apparatus and drive mechanism therefor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233605A (en) * 1937-12-23 1941-03-04 Westinghouse Electric & Mfg Co Circuit interrupter
DE1045511B (en) * 1957-06-25 1958-12-04 Licentia Gmbh Gas pressure switch
DE2733551A1 (en) * 1977-07-25 1979-02-08 Siemens Ag EXHAUST GAS SWITCH
CH675175A5 (en) * 1987-10-27 1990-08-31 Bbc Brown Boveri & Cie
DE4116314A1 (en) * 1991-05-15 1992-11-19 Siemens Ag Friction damper with conical plunger for power switch - has ring around symmetrically divided friction body forced outwards by pressure of tapered switch rod termination
DE9201943U1 (en) * 1992-02-13 1992-06-11 Siemens AG, 8000 München Device for damping a switching movement of an electrical circuit breaker
DE9210943U1 (en) * 1992-08-17 1992-12-10 Häfner & Krullmann GmbH, 4817 Leopoldshöhe Box-like container
DE4427163A1 (en) * 1994-08-01 1996-02-08 Abb Management Ag Gas pressure switch

Also Published As

Publication number Publication date
ATE227047T1 (en) 2002-11-15
EP0811998A1 (en) 1997-12-10
US5920051A (en) 1999-07-06
DE59609837D1 (en) 2002-12-05

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