EP0949643B1 - Electrical switchgear, particularly electromagnetical switchgear with vacuum interrupter - Google Patents

Electrical switchgear, particularly electromagnetical switchgear with vacuum interrupter Download PDF

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Publication number
EP0949643B1
EP0949643B1 EP99106099A EP99106099A EP0949643B1 EP 0949643 B1 EP0949643 B1 EP 0949643B1 EP 99106099 A EP99106099 A EP 99106099A EP 99106099 A EP99106099 A EP 99106099A EP 0949643 B1 EP0949643 B1 EP 0949643B1
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EP
European Patent Office
Prior art keywords
lifting mechanism
axle guide
bearing
switching
switching device
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
EP99106099A
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German (de)
French (fr)
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EP0949643A1 (en
Inventor
Klaus Lankuttis
Konrad Binka
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Eaton Industries GmbH
Original Assignee
Moeller GmbH
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Publication date
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Publication of EP0949643A1 publication Critical patent/EP0949643A1/en
Application granted granted Critical
Publication of EP0949643B1 publication Critical patent/EP0949643B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/662Housings or protective screens
    • H01H33/66261Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/666Operating arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/668Means for obtaining or monitoring the vacuum
    • H01H33/6683Means for obtaining or monitoring the vacuum by gettering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/022Details particular to three-phase circuit breakers

Definitions

  • the invention relates to an electrical switching device with a contact drive, in particular an electromagnetic switching device with a magnetic drive with magnetic core and armature and with at least one vacuum interrupter with a fixed contact and one with a lifting rod in direct linear Operationally connected movable contact and one with the lifting rod and the armature operatively connected rocker switch to implement the Drive movement in a switching movement of the movable contact, wherein the lifting rod at one end with the one carrying the movable contact Contact carrier is firmly connected and the contact carrier on the output side of the Vacuum switching tube in a tube bearing with respect to the longitudinal axis of the lifting rod is slidably mounted.
  • the invention has for its object, even with a non-linear control and attack of the rocker switch with the in linear operative connection the movable switching contact standing rod an improved guidance the same to achieve a non-centered encounter of the To avoid contacts.
  • an opportunity is to be created the stroke of the lifting rod when opening the switch contacts in a maximum limit extended position.
  • the invention solves this problem by design according to the invention of a generic switching device in such a way that the lifting rod their other end in a second axle guide bearing with respect to their Longitudinal axis is slidably mounted and the operative connection of the Shift paddle on the lifting rod between the tube bearing and the axle guide bearing is arranged.
  • the movable contact of the vacuum interrupter by direct connection of the lifting rod only in the tube bearing of the vacuum interrupter, but also behind the actuation point or point of application of the rocker switch on the lifting rod Transfer of the switching movement of the armature.
  • a contact pressure spring is used to control the rocker switch on the lifting rod provided coaxial to the lifting rod between the two bearings, which is supported on the side facing the tube bearing on the lifting rod and on the side facing the axle guide bearing at the fork ends supports the rocker switch, so that a movement of the rocker switch over the contact pressure spring on the lifting rod and the connected to it moving contact is transmitted.
  • a buffer is movably arranged on the lifting rod.
  • This buffer is preferably in three parts and consists of one on the rocker switch or their fork ends adjacent disc and a conical pan and Conical washer, which on the lock nut or round nut of the lifting rod in Bear the axle guide bearing.
  • the axial guidance of the lifting rod in the Additional axle guide bearings are used, for example, at the end the lifting rod firmly attached round nut as a plain bearing, the for example, is also attached as a lock nut. Because the rocker switch cannot move the lifting rod completely axially due to its pivoting movement, however, this is due to the additional second axial guidance of the lifting rod balanced in the axle guide bearing by means of the round nut or the axial guidance improved.
  • the axle guide bearing is open its inner end face adjacent to the end of the lifting rod a stop surface for the round nut to limit the maximum permissible Opening path of the lifting rod is formed when the switch contacts are opened.
  • the contact pressure spring takes off the electromechanical forces and limits the opening path of the Rod.
  • this stop is used as an emergency stop on the axle guide bearing, by striking the round nut here. This can prevent the maximum compatible opening travel of the metal bellows of the vacuum interrupter is not exceeded.
  • the round nut slides in the axle bearing guide in the axial direction of the lifting rod under the action of the actuation attack of the rocker switch, one certain friction occurs. For this reason, the round nut is preferred made of a good sliding material.
  • the axle guide bearing can in the area of the side walls of the housing Switching device, for example, by means of perpendicular to the longitudinal axis of the axle guide bearing and the lifting rod on both sides through the axle guide bearing in the Housing guided screws are attached.
  • the switching tube also includes the movable contact carrier 43 the movable contact 44, whose movement in the direction of arrow P2, P2 'by means of the metal bellows 46 sealed against the vacuum interrupter 45 is.
  • the vacuum interrupter 45 On the output side, the vacuum interrupter 45 has the tube bearing 47, in that of the contact carrier 43 in the slide bearing 47a in the switching movement direction is slidably mounted. In a linear direct operative connection with the movable contact carrier 43 and thus the movable contact 44 the lifting rod 5 attached to the end of the contact carrier 43, which in this Fastening area is also guided through the tube bearing 47.
  • the end of the lifting rod 5 is axially guided in the axle guide bearing 6 the axle guide bearing 6 in the area of the side wall of the rail support housing 4 arranged and there by means of screws 53 which are perpendicular to Longitudinal axis X of the lifting rod are arranged.
  • a contact pressure spring 7 is coaxial with Lift rod arranged, which at one end on the lock nut 55 a spring plate 56 with internal thread arranged there rests and is supported and is fixed, while at the other end the contact pressure spring 7th one longitudinally displaceable in both directions along the axis X spring plate with extension 58 on which the rocker switch with its fork ends 22a, 22b attacks.
  • the axle guide bearing 6 for the free end of the lifting rod 5 is in the figures 3a, 3b shown in more detail. It has a bearing bore 61 with an outlet opening 62 at the front end, which is smaller than the bearing bore 61, so that a contact surface 63 is formed on the inside of the end face is. 3b, the through holes 64, 65 are the Axle bearing guide for fastening the same to the rail support housing 4 can be seen.
  • a two-hole round nut 51 fastened from a slidable material.
  • the sliding surface and guide surface forming round nut at the extreme end of the lifting rod and the Hexagon nut 52 is then arranged on the inside.
  • the two-hole round nut 51 serves to guide the lifting rod in the execution bearing 6 while the hexagon nut 52 is used for stroke adjustment and by means of the round nut is countered.
  • the rocker switch 2 lies with its fork ends 22a, 22b not directly on the axle guide bearing 6, but it is a movable one Multi-part buffer arranged longitudinally displaceably on the lifting rod 5 provided between axle guide bearing 6 and rocker switch 2.
  • This buffer is composed of a disc 57, which is directly on the fork ends of the rocker switch abuts, and a conical socket 59b and conical disk 59a together.
  • This Buffer also serves to compensate for the non-linear actuation attack Switch rocker on the lifting rod via the contact pressure spring and the spring plate 56 especially when returning the lifting rod in the direction of arrow P2 ' when opening the switch contacts and swiveling the rocker switch back into the 1 shown starting position.
  • the movable contact 4, the movable Contact carrier 43, the strand 14, the nuts 54, 55, the lifting rod 5 and the two-hole round nut 51 and the hexagon nut 52 are rigid with one another connected and overall in the direction of arrow P2 to close the contacts and in the direction of arrow P2 'to open the switching contacts in the tube bearing 47 and the axle guide bearing 6 slidably mounted.
  • the closing movement is shown schematically in FIG. 5.
  • the opening movement takes place in the opposite direction, i.e. the anchor moves in the direction of the arrow P3 ', the rocker moves back due to the spring force the contact pressure spring 7 in the starting position, the lifting rod 5 with the movable contact 44 is moved back into the open position becomes.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Keying Circuit Devices (AREA)

Abstract

A movable contact (44) is mounted at the end of a carrier (43), which is supported in one bearing and has a guide rod (5) attached. The guide rod is located in a second bearing (6). The assembly is subjected to the force of a spring (7). The contacts are enclosed within a vacuum chamber by a bellows. The working connection point of a switch rocker (2) at the guide rod is arranged between the two bearings.

Description

Die Erfindung bezieht sich auf ein elektrisches Schaltgerät mit einem Kontaktantrieb, insbesondere ein elektromagnetisches Schaltgerät mit einem Magnetantrieb mit Magnetkern und Anker und mit wenigstens einer Vakuumschaltröhre mit einem Festkontakt und einem mit einer Hubstange in direkter linearer Wirkverbindung stehenden beweglichen Kontakt und einer mit der Hubstange und dem Anker in Wirkverbindung stehenden Schaltwippe zur Umsetzung der Antriebsbewegung in eine Schaltbewegung des beweglichen Kontaktes, wobei die Hubstange an einem Ende mit dem den beweglichen Kontakt tragenden Kontaktträger fest verbunden ist und der Kontaktträger ausgangsseitig der Vakuumschaltröhre in einem Rohrlager in bezug auf die Längsachse der Hubstange gleitverschieblich gelagert ist.The invention relates to an electrical switching device with a contact drive, in particular an electromagnetic switching device with a magnetic drive with magnetic core and armature and with at least one vacuum interrupter with a fixed contact and one with a lifting rod in direct linear Operationally connected movable contact and one with the lifting rod and the armature operatively connected rocker switch to implement the Drive movement in a switching movement of the movable contact, wherein the lifting rod at one end with the one carrying the movable contact Contact carrier is firmly connected and the contact carrier on the output side of the Vacuum switching tube in a tube bearing with respect to the longitudinal axis of the lifting rod is slidably mounted.

Elektrische Schaltgeräte der gattungsgemäßen Art sind bekannt. Sie können als Standardschütze, Hochleistungsschütze und Leistungsschalter mit Vakuumröhre(n) mit nichtlinearer Betätigung der Vakuumschaltröhre zwecks Schalten der Schaltkontakte ausgeführt sein. Bei einer nichtlinearen Betätigung der Schaltröhre durch die Schaltwippe, wenn diese nämlich eine Schwenkbewegung ausführt, während die Vakuumschaltröhre über eine Hubstange in linearer Wirkverbindung steht, kann es bei nichtlinearer Betätigung der Vakuumschaltröhre zu einem Verkippen der Kontakte in der Vakuumschaltröhre gegeneinander kommen. Vielfach wird nur eine einfache Lagerung der Hubstange in einem Röhrenlager der Vakuumschaltröhre und die Gleitführungslagerung im Angriffsbereich der Schaltwippe an der Hubstange vorgesehen. Bei einer solchen einfachen Lagerung des beweglichen Kontaktes kann es zu einem nichtzentrischen Aufeinandertreffen der Kontakte beim Schalten infolge einer nichtlinearen Betätigung zum Bewegen des beweglichen Kontaktes mit Verschweißungsgefahr und Verringerung der Lebensdauer kommen. Darüber hinaus ist bei einer einfachen Lagerung der Hubstange deren Hub beim Öffnen nicht begrenzbar.Electrical switching devices of the generic type are known. You can as standard contactors, high-performance contactors and circuit breakers with vacuum tube (s) with non-linear actuation of the vacuum interrupter for the purpose Switching of the switching contacts must be carried out. With a non-linear actuation the switching tube through the rocker switch, if this one Pivots while the vacuum interrupter is operated via a lifting rod is in a linear operative connection, it can with non-linear actuation the vacuum interrupter to tilt the contacts in the vacuum interrupter come against each other. In many cases, only a simple storage the lifting rod in a tube bearing of the vacuum interrupter and the sliding guide bearing provided in the attack area of the rocker switch on the lifting rod. With such simple storage of the movable contact can there is a non-centered contact of the contacts when switching due to a non-linear actuation to move the moving contact come with risk of welding and reduction of life. In addition, with a simple storage of the lifting rod Stroke cannot be limited when opening.

Der Erfindung liegt die Aufgabe zugrunde, auch bei einer nichtlinearen Ansteuerung und Angriff der Schaltwippe auf die in linearer Wirkverbindung mit dem beweglichen Schaltkontakt stehende Hubstange eine verbesserte Führung derselben zu erzielen, um ein nichtzentrisches Aufeinandertreffen der Kontakte zu vermeiden. Darüber hinaus soll eine Möglichkeit geschaffen werden, den Hub der Hubstange beim Öffnen der Schaltkontakte in einer maximalen ausgefahrenen Position zu begrenzen.The invention has for its object, even with a non-linear control and attack of the rocker switch with the in linear operative connection the movable switching contact standing rod an improved guidance the same to achieve a non-centered encounter of the To avoid contacts. In addition, an opportunity is to be created the stroke of the lifting rod when opening the switch contacts in a maximum limit extended position.

Die Erfindung löst diese Aufgabe durch erfindungsgemäße Ausgestaltung eines gattungsgemäßen Schaltgerätes in der Weise, daß die Hubstange an ihrem anderen Ende in einem zweiten Achsführungslager in bezug auf ihre Längsachse gleitverschieblich gelagert ist und die Wirkverbindungsstelle der Schaltwippe an der Hubstange zwischen dem Röhrenlager und dem Achsführungslager angeordnet ist. Erfindungsgemäß wird die den beweglichen Kontakt der Vakuumschaltröhre durch Direktverbindung betätigende Hubstange nicht nur im Röhrenlager der Vakuumschaltröhre geführt, sondern zusätzlich hinter der Betätigungsstelle oder Angriffsstelle der Schaltwippe an der Hubstange zur Übertragung der Schaltbewegung des Ankers. Auf diese Weise wird erfindungsgemäß erreicht, daß trotz der nichtlinearen Ansteuerung durch die Schaltwippe, die nämlich eine Schwenkbewegung ausführt, daß infolge der doppelten Lagerung, nämlich einerseits Röhrenlager andererseits Achsführungslager, die Schaltbewegung des beweglichen Kontaktes recht genau geführt werden kann. Auf diese Weise wird erreicht, daß der Kontaktabbrand gleichmäßiger und der gesamte Bewegungsapparat unanfälliger gegen äußere Kräfte wird, d.h. diese besser aufnehmen kann.The invention solves this problem by design according to the invention of a generic switching device in such a way that the lifting rod their other end in a second axle guide bearing with respect to their Longitudinal axis is slidably mounted and the operative connection of the Shift paddle on the lifting rod between the tube bearing and the axle guide bearing is arranged. According to the invention, the movable contact of the vacuum interrupter by direct connection of the lifting rod only in the tube bearing of the vacuum interrupter, but also behind the actuation point or point of application of the rocker switch on the lifting rod Transfer of the switching movement of the armature. In this way, according to the invention achieved that despite the non-linear control by the Shift paddle, which performs a pivoting movement that as a result of double bearings, namely tube bearings on the one hand and axle guide bearings on the other, the switching movement of the movable contact guided quite accurately can be. In this way it is achieved that the contact erosion more even and the entire musculoskeletal system less susceptible to external Forces, i.e. can absorb them better.

Vorteilhafte Weiterbildung der Erfindung sind den kennzeichnenden Merkmalen der Unteransprüche entnehmbar. Advantageous developments of the invention are the characteristic features of the subclaims.

Für die Ansteuerung der Schaltwippe an der Hubstange ist eine Kontaktdruckfeder koaxial zur Hubstange zwischen den beiden Lagern vorgesehen, die sich an der dem Röhrenlager zugewandten Seite an der Hubstange abstützt und auf der dem Achsführungslager zugewandten Seite an den Gabelenden der Schaltwippe abstützt, so daß eine Bewegung der Schaltwippe über die Kontaktdruckfeder auf die Hubstange und dem mit dieser verbundenen beweglichen Kontakt übertragen wird.A contact pressure spring is used to control the rocker switch on the lifting rod provided coaxial to the lifting rod between the two bearings, which is supported on the side facing the tube bearing on the lifting rod and on the side facing the axle guide bearing at the fork ends supports the rocker switch, so that a movement of the rocker switch over the contact pressure spring on the lifting rod and the connected to it moving contact is transmitted.

In Weiterbildung der Erfindung ist vorgesehen, daß zwischen den Gabelenden der Schaltwippe und dem in dem Achsführungslager geführten Ende der Hubstange ein Puffer beweglich auf der Hubstange angeordnet ist. Dieser Puffer ist bevorzugt dreiteilig ausgebildet und besteht aus einer an der Schaltwippe bzw. deren Gabelenden anliegenden Scheibe und einer Kegelpfanne und Kegelscheibe, die an der Kontermutter oder Rundmutter der Hubstange im Achsführungslager anliegen. Die axiale Führung der Hubstange in dem zusätzlichen Achsführungslager erfolgt beispielsweise mittels einer am Ende der Hubstange fest angebrachten Rundmutter als Gleitlager, die beispielsweise auch als Kontermutter befestigt wird. Da die Schaltwippe infolge ihrer Schwenkbewegung die Hubstange nicht ganz axial führen kann, wird dieses jedoch durch die zusätzliche zweite axiale Führung der Hubstange in dem Achsführungslager mittels der Rundmutter ausgeglichen bzw. die axiale Führung verbessert.In a development of the invention it is provided that between the fork ends the rocker switch and the end of the lifting rod guided in the axle guide bearing a buffer is movably arranged on the lifting rod. This buffer is preferably in three parts and consists of one on the rocker switch or their fork ends adjacent disc and a conical pan and Conical washer, which on the lock nut or round nut of the lifting rod in Bear the axle guide bearing. The axial guidance of the lifting rod in the Additional axle guide bearings are used, for example, at the end the lifting rod firmly attached round nut as a plain bearing, the for example, is also attached as a lock nut. Because the rocker switch cannot move the lifting rod completely axially due to its pivoting movement, however, this is due to the additional second axial guidance of the lifting rod balanced in the axle guide bearing by means of the round nut or the axial guidance improved.

Nach einem weiteren Vorschlag der Erfindung ist das Achsführungslager auf seiner dem Ende der Hubstange benachbarten innenseitigen Stirnfläche mit einer Anschlagfläche für die Rundmutter zur Begrenzung des maximalen zulässigen Öffnungsweges der Hubstange beim Öffnen der Schaltkontakte ausgebildet. Bei normalem Öffnen der Schaltkontakte nimmt die Kontaktdruckfeder die elektromechanischen Kräfte auf und begrenzt den Öffnungsweg der Hubstange. In all den Fällen jedoch, in denen bei einem schlagartigen Aufreißen der Schaltkontakte die Hubstange in Richtung Achsführungslager beschleunigt wird und die elektromechanischen Kräfte so groß werden, daß die Kraft der Kontaktdruckfeder den Hubstangenweg nicht ausreichend begrenzt, kommt dieser Anschlag als Notanschlag am Achsführungslager zum Einsatz, indem die Rundmutter hier anschlägt. So kann verhindert werden, daß der maximal verträgliche Öffnungsweg des Metallfaltenbalges der Vakuumschaltröhre nicht überschritten wird.According to a further proposal of the invention, the axle guide bearing is open its inner end face adjacent to the end of the lifting rod a stop surface for the round nut to limit the maximum permissible Opening path of the lifting rod is formed when the switch contacts are opened. When the switch contacts open normally, the contact pressure spring takes off the electromechanical forces and limits the opening path of the Rod. In all cases, however, in the event of a sudden tearing open of the switching contacts accelerates the lifting rod towards the axle guide bearing will and the electromechanical forces become so great that the Force of the contact pressure spring does not sufficiently limit the travel of the lifting rod, this stop is used as an emergency stop on the axle guide bearing, by striking the round nut here. This can prevent the maximum compatible opening travel of the metal bellows of the vacuum interrupter is not exceeded.

Die Rundmutter gleitet in der Achslagerführung in axialer Richtung der Hubstange unter Einwirkung des Betätigungsangriffes der Schaltwippe, wobei eine gewisse Reibung auftritt. Aus diesem Grunde ist die Rundmutter bevorzugt aus einem gut gleitfähigen Werkstoff hergestellt.The round nut slides in the axle bearing guide in the axial direction of the lifting rod under the action of the actuation attack of the rocker switch, one certain friction occurs. For this reason, the round nut is preferred made of a good sliding material.

Das Achsführungslager kann im Bereich der seitlichen Gehäusewände des Schaltgerätes beispielsweise mittels senkrecht zur Längsachse des Achsführungslagers und der Hubstange beidseitig durch das Achsführungslager in das Gehäuse geführter Schrauben befestigt werden.The axle guide bearing can in the area of the side walls of the housing Switching device, for example, by means of perpendicular to the longitudinal axis of the axle guide bearing and the lifting rod on both sides through the axle guide bearing in the Housing guided screws are attached.

Mit der erfindungsgemäßen Lagerung der eine lineare Schaltbewegung ausführenden Hubstange, die in direkter Wirkverbindung mit dem beweglichen Schaltkontakt steht, wird eine verbesserte und genauere Führung des Schaltkontaktes beim Schalten bei nichtlinearem Betätigungsangriff durch die Schaltwippe erzielt. Es ist zwar ein zusätzliches Lagerteil erforderlich und eine geringfügige zusätzliche Reibung in dem Achsführungslager zu dulden, andererseits wird durch die verbesserte Führung ein gleichmäßigerer Abbrand der Schaltkontakte erreicht und die Begrenzung des öffnungshubes ist auf einfache Weise möglich. Darüber hinaus ist durch die erfindungsgemäße doppelseitige Lagerung der Hubstange auch eine bessere Unempfindlichkeit des Schaltapparates gegen äußere Kräfte gegeben.With the bearing according to the invention executing a linear switching movement Lift rod, which is in direct operative connection with the movable Switching contact is, improved and more accurate guidance of the switching contact when switching with non-linear actuation attack by the Shift paddle achieved. An additional bearing part is required and one to tolerate minor additional friction in the axle guide bearing, on the other hand the improved guidance ensures a more even burn-up of the Switch contacts reached and the opening stroke limit is simple Way possible. In addition, the inventive double-sided Storage of the lifting rod also better insensitivity to the Switching devices against external forces.

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen

Figur 1:
einen Querschnitt durch den Schaltraum mit Vakuumschaltröhre und Schaltwippe umfassenden Teil eines Vakuumschaltgerätes;
Figur 2:
den auszugsweisen Querschnitt EE von Fig. 4;
Figur 3a:
das Achsführungslager im Querschnitt;
Figur 3b:
den Schnitt BB gemäß Fig. 3a;
Figur 4:
eine Draufsicht auf den Schaltraum gemäß Fig. 1 ohne Deckel des Schaltgerätes;
Figur 5:
das Detail der Schaltwippe im Betätigungseingriff des Einschaltzustandes mit der Hubstange gemäß Fig. 1.
The invention is explained below with reference to the drawing. Show it
Figure 1:
a cross section through the control room with vacuum interrupter and rocker switch comprising part of a vacuum switching device;
Figure 2:
the excerpt cross-section EE of Fig. 4;
Figure 3a:
the axle guide bearing in cross section;
Figure 3b:
the section BB according to FIG. 3a;
Figure 4:
a plan view of the control room of Figure 1 without the cover of the switching device.
Figure 5:
the detail of the rocker switch in the operating engagement of the switch-on state with the lifting rod according to FIG. 1.

Von dem Vakuumschaltgerät sind gemäß Fig. 1 die hier wesentlichen beteiligten Organe im Querschnitt AA nach Fig. 4 dargestellt. Der Anker 10 ist an der Ankeraufnahme 11 befestigt und an der Schaltwippe 2 unter Zwischenlage der Dämpfungslager 12 mittels des Bolzens 13 festgelegt, und zwar an dem an einem Ende der Schaltwippe 2 ausgebildeten Wippenaufnahmelager 21. Die Schaltwippe 2 wiederum ist in dem Schienenträgergehäuse 4 bzw. dem nicht weiter dargestellten Antriebsgehäuse des Vakuumschaltgerätes schwenkbar gelagert. Im oberen Bereich des Schienenträgergehäuses 4 ist die Vakuumschaltröhre 45 angeordnet, die an ihrem einen Ende den Festkontakt 41 tragenden Festkontaktträger 40 aufweist, der mittels Schraube 17 an der Anschlußfahne 16 befestigt ist und in dem Schienenträgergehäuse 4 fixiert ist. Die Schaltröhre umfaßt des weiteren den beweglichen Kontaktträger 43 mit dem beweglichen Kontakt 44, dessen Bewegung in Pfeilrichtung P2,P2' mittels des Metallfaltenbalges 46 gegenüber der Vakuumschaltröhre 45 abgedichtet ist. Ausgangsseitig weist die Vakuumschaltröhre 45 das Röhrenlager 47 auf, in dem der Kontaktträger 43 in dem Gleitlager 47a in der Schaltbewegungsrichtung gleitverschieblich gelagert ist. In linearer direkter Wirkverbindung mit dem beweglichen Kontaktträger 43 und damit dem beweglichen Kontakt 44 steht die am Ende des Kontaktträgers 43 befestigte Hubstange 5, die in diesem Befestigungsbereich auch durch das Röhrenlager 47 geführt ist. An ihrem anderen Ende ist die Hubstange 5 in dem Achsführungslager 6 axial geführt, wobei das Achsführungslager 6 im Bereich der Seitenwand des Schienenträgergehäuses 4 angeordnet und dort mittels Schrauben 53, die senkrecht zur Längsachse X der Hubstange verlaufen, angeordnet sind. According to FIG. 1, those of the vacuum switching device that are essential here are involved Organs in cross section AA shown in FIG. 4. The armature 10 is on the anchor receptacle 11 attached and on the rocker switch 2 with the interposition the damping bearing 12 is fixed by means of the bolt 13, on the one end of the rocker switch 2 trained rocker receiving bearing 21. Die Switch rocker 2 is in turn in the rail support housing 4 or not Drive housing of the vacuum switching device shown further pivotable stored. In the upper area of the rail support housing 4 is the vacuum interrupter 45 arranged, which carries the fixed contact 41 at one end Fixed contact carrier 40, which by means of screw 17 on the terminal lug 16 is fixed and is fixed in the rail support housing 4. The switching tube also includes the movable contact carrier 43 the movable contact 44, whose movement in the direction of arrow P2, P2 'by means of the metal bellows 46 sealed against the vacuum interrupter 45 is. On the output side, the vacuum interrupter 45 has the tube bearing 47, in that of the contact carrier 43 in the slide bearing 47a in the switching movement direction is slidably mounted. In a linear direct operative connection with the movable contact carrier 43 and thus the movable contact 44 the lifting rod 5 attached to the end of the contact carrier 43, which in this Fastening area is also guided through the tube bearing 47. On her other The end of the lifting rod 5 is axially guided in the axle guide bearing 6 the axle guide bearing 6 in the area of the side wall of the rail support housing 4 arranged and there by means of screws 53 which are perpendicular to Longitudinal axis X of the lifting rod are arranged.

An der Hubstange ist des weiteren die zu der Anschlußschiene 15 führende Litze 14 befestigt im direkten Anschluß an das Ende des beweglichen Kontaktträgers 43 und auf der anderen Seite mittels Sechskantmutter 54 festgelegt. Die Schaltwippe 2 greift mit ihren Gabelenden 22a, 22b, siehe auch Fig. 4, beidseitig der Hubstange 5 zwischen den beiden Lagern 47 und 6. Zur Übertragung der Schaltbewegung P1 der Schaltwippe, welches eine Schwenkbewegung um das im Bereich des anderen Endes 21 der Schaltwippe befindlichen Lagers derselben ist, ist eine Kontaktdruckfeder 7 koaxial zur Hubstange angeordnet, die an ihrem einen Ende an der Kontermutter 55 über einen dort angeordneten Federteller 56 mit Innengewinde anliegt und sich abstützt und fixiert ist, während an dem anderen Ende die Kontaktdruckfeder 7 einen längsverschieblich in beiden Richtungen längs der Achse X Federteller mit Ansatz 58 aufweist, an dem die Schaltwippe mit ihren Gabelenden 22a, 22b angreift.On the lifting rod is further leading to the connecting bar 15 Strand 14 attached directly to the end of the movable contact carrier 43 and fixed on the other side by means of a hexagon nut 54. The rocker switch 2 engages with its fork ends 22a, 22b, see also Fig. 4, on both sides of the lifting rod 5 between the two bearings 47 and 6. Zur Transfer of the switching movement P1 of the rocker switch, which is a Pivoting movement in the area of the other end 21 of the rocker switch located bearing the same, a contact pressure spring 7 is coaxial with Lift rod arranged, which at one end on the lock nut 55 a spring plate 56 with internal thread arranged there rests and is supported and is fixed, while at the other end the contact pressure spring 7th one longitudinally displaceable in both directions along the axis X spring plate with extension 58 on which the rocker switch with its fork ends 22a, 22b attacks.

Das Achsführungslager 6 für das freie Ende der Hubstange 5 ist in den Figuren 3a, 3b näher dargestellt. Es weist eine Lagerbohrung 61 mit einer Ausgangsöffnung 62 am stirnseitigen Ende auf, die kleiner als die Lagerbohrung 61 ist, so daß an der Innenseite der Stirnfläche eine Anlagefläche 63 gebildet ist. Im Querschnitt gemäß Fig. 3b sind die Durchgangsbohrungen 64, 65 der Achslagerführung zur Befestigung desselben an dem Schienenträgergehäuse 4 ersichtlich. Am Ende der Hubstange ist zur Führung in der Achslagerführung 6 eine Zweiloch-Rundmutter 51 aus einem gleitfähigen Werkstoff befestigt. In dem gezeigten Ausführungsbeispiel befindet sich die die Gleitfläche und Führungsfläche bildende Rundmutter am äußersten Ende der Hubstange und die Sechskantmutter 52 ist dann innenliegend angeordnet. Die Zweiloch-Rundmutter 51 dient der Führung der Hubstange in dem Ausführungslager 6, während die Sechskantmutter 52 zur Hubeinstellung dient und mittels der Rundmutter gekontert wird. Die Schaltwippe 2 liegt mit ihren Gabelenden 22a, 22b nicht unmittelbar an dem Achsführungslager 6 an, sondern es ist ein beweglicher längsverschieblich auf der Hubstange 5 angeordneter mehrteiliger Puffer zwischen Achsführungslager 6 und Schaltwippe 2 vorgesehen. Dieser Puffer setzt sich aus einer Scheibe 57, die direkt an den Gabelenden der Schaltwippe anliegt, und einer Kegelpfanne 59b und Kegelscheibe 59a zusammen. Dieser Puffer dient auch dem Ausgleich des nichtlinearen Betätigungsangriffes der Schaltwippe an der Hubstange über die Kontaktdruckfeder und dem Federteller 56 insbesondere bei der Rückführung der Hubstange in Pfeilrichtung P2' beim Öffnen der Schaltkontakte und Rückschwenken der Schaltwippe in die in der Fig. 1 gezeigte Ausgangsposition. Der bewegliche Kontakt 4, der bewegliche Kontaktträger 43, die Litze 14, die Muttern 54, 55, die Hubstange 5 sowie die Zweiloch-Rundmutter 51 und die Sechskantmutter 52 sind starr miteinander verbunden und insgesamt in Pfeilrichtung P2 zum Schließen der Kontakte und in Pfeilrichtung P2' zum Öffnen der Schaltkontakte in dem Röhrenlager 47 und dem Achsführungslager 6 gleitverschieblich gelagert. Bei Bewegung der Schaltwippe 2 durch Auslösung einer entsprechenden Ankerbewegung, siehe Pfeilrichtung P3 des Ankers 10, wird die Schaltwippe aus der Ausgangsstellung, siehe Fig. 1, in Pfeilrichtung P1 an ihren Gabelenden geschwenkt und nimmt hierbei, wie bereits erläutert, über den Federteller mit Ansatz 58 die Kontaktdruckfeder 7, den Federteller 56 mit Innengewinde an der Mutter 55 anschlagend die Hubstange samt der mit ihr starr verbundenen Teile mit, wodurch die Schaltbewegung in Pfeilrichtung P2 zum Schließen der Kontakte ausgeführt wird.The axle guide bearing 6 for the free end of the lifting rod 5 is in the figures 3a, 3b shown in more detail. It has a bearing bore 61 with an outlet opening 62 at the front end, which is smaller than the bearing bore 61, so that a contact surface 63 is formed on the inside of the end face is. 3b, the through holes 64, 65 are the Axle bearing guide for fastening the same to the rail support housing 4 can be seen. At the end of the lifting rod is for guidance in the axle bearing guide 6 a two-hole round nut 51 fastened from a slidable material. In the embodiment shown is the sliding surface and guide surface forming round nut at the extreme end of the lifting rod and the Hexagon nut 52 is then arranged on the inside. The two-hole round nut 51 serves to guide the lifting rod in the execution bearing 6 while the hexagon nut 52 is used for stroke adjustment and by means of the round nut is countered. The rocker switch 2 lies with its fork ends 22a, 22b not directly on the axle guide bearing 6, but it is a movable one Multi-part buffer arranged longitudinally displaceably on the lifting rod 5 provided between axle guide bearing 6 and rocker switch 2. This buffer is composed of a disc 57, which is directly on the fork ends of the rocker switch abuts, and a conical socket 59b and conical disk 59a together. This Buffer also serves to compensate for the non-linear actuation attack Switch rocker on the lifting rod via the contact pressure spring and the spring plate 56 especially when returning the lifting rod in the direction of arrow P2 ' when opening the switch contacts and swiveling the rocker switch back into the 1 shown starting position. The movable contact 4, the movable Contact carrier 43, the strand 14, the nuts 54, 55, the lifting rod 5 and the two-hole round nut 51 and the hexagon nut 52 are rigid with one another connected and overall in the direction of arrow P2 to close the contacts and in the direction of arrow P2 'to open the switching contacts in the tube bearing 47 and the axle guide bearing 6 slidably mounted. When moving the Switch rocker 2 by triggering a corresponding armature movement, see Arrow direction P3 of armature 10, the rocker switch is from the starting position, see Fig. 1, pivoted in the direction of arrow P1 at its fork ends and takes, as already explained, the spring plate with approach 58 the Contact pressure spring 7, the spring plate 56 with an internal thread on the nut 55 striking the lifting rod together with the parts rigidly connected to it, whereby the switching movement in the direction of arrow P2 to close the contacts is performed.

Die Schließbewegung ist in der Fig. 5 schematisch dargestellt. Die Öffnungsbewegung erfolgt in umgekehrter Richtung, d.h. der Anker bewegt sich in Pfeilrichtung P3', die Wippe bewegt sich wieder zurück auf Grund der Federkraft der Kontaktdruckfeder 7 in die Ausgangsstellung, wobei die Hubstange 5 mit dem beweglichen Kontakt 44 wieder in die Öffnungsstellung zurückbewegt wird. Bei schlagartigem Aufreißen der Kontakte wird die Hubbewegung der Hubstange 5 beim öffnen in Pfeilrichtung P2' durch Anschlagen der Rundmutter an der Anschlagfläche des Achsführungslagers begrenzt. Dies stellt sogleich einen Schutz für den Öffnungsweg des Metallfaltenbalges 46 dar, wobei die Hubbegrenzung der Hubstange stets so ausgelegt ist, daß in keinem Fall ein Aufreißen des Metallfaltenbalges 46 durch übermäßige Hubbewegung der Hubstange erfolgen kann.The closing movement is shown schematically in FIG. 5. The opening movement takes place in the opposite direction, i.e. the anchor moves in the direction of the arrow P3 ', the rocker moves back due to the spring force the contact pressure spring 7 in the starting position, the lifting rod 5 with the movable contact 44 is moved back into the open position becomes. If the contacts suddenly open, the stroke movement of the Lift rod 5 when opening in the direction of arrow P2 'by striking the round nut limited to the stop surface of the axle guide bearing. This poses immediately provides protection for the opening path of the metal bellows 46, the stroke limitation of the lifting rod is always designed so that in none If the metal bellows 46 is torn open due to excessive lifting movement the lifting rod can be done.

Claims (10)

  1. Electrical switching device having a contact drive, in particular an electromagnetic switching device having a magnetic drive with a magnet core and armature and having at least one vacuum interrupter with a stationary contact, and having a moving contact which is directly linearly operatively connected to a lifting mechanism, and having a switching rocker, which is operatively connected to the lifting mechanism and to the armature, for converting the drive movement to a switching movement of the moving contact, with the lifting mechanism being firmly connected at one end to the contact support to which the moving contact is fitted, and the contact support being mounted on the output side of the vacuum interrupter in a tube support such that it can slide with respect to the longitudinal axis of the lifting mechanism, characterized in that the lifting mechanism (5) is mounted at its other end in a second axle guide bearing (6) such that it can slide with respect to its longitudinal axis (X), and the operative connection point of the switching rocker (2) is arranged on the lifting mechanism (5), between the tube bearing (47) and the axle guide bearing (6).
  2. Switching device according to Claim 1, characterized in that a contact compression spring (7) is provided coaxially with respect to the lifting mechanism (5) between the two bearings (47, 6), is supported on the lifting mechanism on the side facing the tube bearing (47) and is supported at the fork ends (22a, 22b) of the switching rocker (2) on the side facing the axle guide bearing (6), so that any movement of the switching rocker is transmitted via the contact spring to the lifting mechanism, and to the moving contact which is connected to it.
  3. Switching device according to one of Claims 1 or 2, characterized in that a buffer (58, 59a, 59b) is arranged, such that it can move on the lifting mechanism, between the fork ends (22a, 22b) of the switching rocker (2) and that end of the lifting mechanism (5) which is guided in the axle guide bearing (6).
  4. Switching device according to Claim 3, characterized in that the buffer comprises a disc (57), which rests on the fork ends (22a, 22b) of the switching rocker (2), a conical pot (59b) and a conical disc (59a).
  5. Switching device according to one of Claims 1 to 4, characterized in that a two-hole round nut (51) is attached to that end of the lifting mechanism (5) which is guided in the axle guide bearing (6), as a sliding bearing for guiding the lifting mechanism, for example being attached by means of a lock nut (52).
  6. Switching device according to one of Claims 1 to 5, characterized in that a hexagonal nut (52) for adjusting the lift of the lifting mechanism is provided on the lifting mechanism (5) in the area of the axle guide bearing (6), and the two-hole round nut (51) is used for locking the hexagonal nut (52).
  7. Switching device according to one of Claims 1 to 6, characterized in that, on its inner end surface which is adjacent to the end of the lifting mechanism (5), the axle guide bearing (6) has a stop surface (63) for the two-hole round nut in order to limit the maximum permissible opening movement of the lifting mechanism during opening of the switching contacts.
  8. Switching device according to one of Claims 1 to 7, characterized in that the buffer rests on the hexagonal nut in the axle guide bearing (6).
  9. Switching device according to one of Claims 1 to 8, characterized in that the round nut (51) which forms the sliding bearing is attached to the end of the lifting mechanism and, during the opening movement of the switching contacts, limits the maximum movement of the lifting mechanism, if it has not already been possible to limit this by means of the contact compression spring, by striking against the stop surface (63) of the axle guide of the axle guide bearing (6).
  10. Switching device according to one of Claims 1 to 9, characterized in that the axle guide bearing (6) is attached by means of screws (53) which are passed into the housing through the axle guide bearing on both sides at right angles to the longitudinal axis of the bearing (6) and of the lifting mechanism (5).
EP99106099A 1998-03-31 1999-03-26 Electrical switchgear, particularly electromagnetical switchgear with vacuum interrupter Expired - Lifetime EP0949643B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19814398 1998-03-31
DE19814398A DE19814398C1 (en) 1998-03-31 1998-03-31 Electrical switching device, in particular electromagnetic switching device with vacuum interrupter

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EP0949643A1 EP0949643A1 (en) 1999-10-13
EP0949643B1 true EP0949643B1 (en) 2003-05-28

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Application Number Title Priority Date Filing Date
EP99101052A Expired - Lifetime EP0955655B1 (en) 1998-03-31 1999-01-22 Shielding and getter for a vacuum switching tube and method for fixing of the gatter to the shielding
EP99106099A Expired - Lifetime EP0949643B1 (en) 1998-03-31 1999-03-26 Electrical switchgear, particularly electromagnetical switchgear with vacuum interrupter

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EP99101052A Expired - Lifetime EP0955655B1 (en) 1998-03-31 1999-01-22 Shielding and getter for a vacuum switching tube and method for fixing of the gatter to the shielding

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EP (2) EP0955655B1 (en)
AT (1) ATE241854T1 (en)
DE (3) DE19814398C1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10238950B4 (en) * 2002-08-24 2008-04-10 Abb Patent Gmbh Vacuum switchgear
DE10322927A1 (en) 2003-05-21 2004-12-16 Abb Patent Gmbh Vacuum switching chamber has getter material in form of tablet or ring fixed in recess, preferably bore, in fixed and/or movable contact carrier
DE102014212583A1 (en) 2014-06-30 2015-12-31 Siemens Aktiengesellschaft Avoid misalignment of a drive rod of a circuit breaker
CN110718415B (en) * 2018-07-12 2021-11-16 平高集团有限公司 Vacuum circuit breaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185690B (en) * 1963-05-15 1965-01-21 Ass Elect Ind Vacuum switch
US4032870A (en) * 1975-09-15 1977-06-28 General Electric Company Electric circuit breaker with electromagnetic-assist means for opposing magnetic contact-separating forces
NL170995C (en) * 1978-12-01 1983-01-17 Hazemeijer Bv VACUUM SWITCH, METAL SCREEN AND CATCH ELEMENT THEREFOR.
DE8905949U1 (en) * 1989-05-11 1990-09-13 Siemens AG, 1000 Berlin und 8000 München Multipole vacuum circuit breaker with an insulating support arrangement for the switching tubes
KR940000049Y1 (en) * 1991-12-13 1994-01-05 금성계전 주식회사 Vacuum breaker
FR2737805B1 (en) * 1995-08-08 1997-08-29 Gec Alsthom T & D Sa RUPTO-FUSE DISCONNECTOR

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Publication number Publication date
EP0949643A1 (en) 1999-10-13
ATE241854T1 (en) 2003-06-15
DE59905131D1 (en) 2003-05-28
EP0955655B1 (en) 2003-04-23
DE19814398C1 (en) 1999-12-30
DE59905706D1 (en) 2003-07-03
EP0955655A1 (en) 1999-11-10

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