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EP0135789B1 - High-voltage isolating switch, in particular a pantograph isolating switch able to make or break currents - Google Patents

High-voltage isolating switch, in particular a pantograph isolating switch able to make or break currents Download PDF

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Publication number
EP0135789B1
EP0135789B1 EP84109850A EP84109850A EP0135789B1 EP 0135789 B1 EP0135789 B1 EP 0135789B1 EP 84109850 A EP84109850 A EP 84109850A EP 84109850 A EP84109850 A EP 84109850A EP 0135789 B1 EP0135789 B1 EP 0135789B1
Authority
EP
European Patent Office
Prior art keywords
contact
equipment
countercontact
isolating switch
switching
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
Application number
EP84109850A
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German (de)
French (fr)
Other versions
EP0135789A2 (en
EP0135789A3 (en
Inventor
Wolfgang Dipl.-Ing. Eberhardt
Kurt Freitag
Dietrich Dipl.-Ing. Hoffmann
Erwin Rohde
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to AT84109850T priority Critical patent/ATE44422T1/en
Publication of EP0135789A2 publication Critical patent/EP0135789A2/en
Publication of EP0135789A3 publication Critical patent/EP0135789A3/en
Application granted granted Critical
Publication of EP0135789B1 publication Critical patent/EP0135789B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
    • H01H31/36—Contact moved by pantograph
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm

Definitions

  • the invention relates to a high-voltage isolating switch with movable main contact pieces arranged at the ends of a pair of scissors that can be moved in the vertical direction, a main contact piece that is fixedly mounted on the conductor cable of the high-voltage line as a counter-contact piece, and preliminary contacts.
  • This high-voltage disconnector is relatively low, namely that of the main contact pieces as well as the pre-contact pieces. It is therefore only a shift of the erosion to the pre-contact pieces. The erosion itself can not be reduced by the low switching speed, so that the life of the pre-contact pieces is limited.
  • switch disconnectors with main contacts and contacts which open after the main contacts for tearing off the arc are known.
  • an energy store is charged during the final shutdown in order to release the contact pieces after a certain stroke in order to break the arc, which then snap back into their starting position.
  • the installation of gas-emitting material for extinguishing the arc is also known from these documents.
  • the object of the invention is to make available a high-voltage isolating switch in which, when switched off, the contact pieces of the pre-contact system separate at a predetermined speed, regardless of the speed of the main contact pieces.
  • the high-voltage circuit breaker proposed by the subsequently published EP-A-0104599 (which contains a prior art in accordance with Art. 54 (3) EPC, since the priority date of the corresponding application lies before that of the application on which the present patent is based), which has the features of Sections a) to d) of claim 1 further developed.
  • the advantage of the invention is that the conditions for the interruption of the currents are optimized and the contact erosion is reduced.
  • the first contact device mentioned in section e of claim 1 is designed in such a way that, even with slow movement, it quickly comes from the state of the first contact with the contact load 0 to the state of full current carrying capacity with a corresponding contact load. This causes no problems when switching on the isolator due to the slow ("creeping") switching on of the contacts of the second contact device mentioned in section e of claim 1, since the first contact device switches on the circuit just before the contacts of the second contact device touch and so on protects the contacts of the second contact device from scorching.
  • FIGS. 1 and 2 which essentially consists of a porcelain column 1 and a scissors 2 that can be moved in the vertical direction with the main contact pieces 3a, 3b, two pliers-like contacts are provided on the upper mating contact 4 fixedly attached to the conductor cable 5 about a fastening point 10 pivotable contact bracket 6a, 6b arranged, which are held by the force of a spring 7 in a spread position at a certain distance from the counter contact 4 by the force of a spring.
  • the contact pieces 8b of the additional switching contacts 8 forming the pre-contact system are arranged on the ends of the crossed levers 11, 11 'formed on the pivotable contact brackets 6a, 6b, facing away from the main contact pieces 3a, 3b.
  • the contact pieces 8a of the additional switching contacts 8 carried by the counter-contact piece 4 are arranged on a common contact carrier 30 between the crossed levers 11, 11 'such that they are contacted by the contact pieces 8b of the additional switching contacts 8 carried by these levers 11, 11', when switching on the main contact pieces 3a, 3b causes the contact bracket 6a, 6b and thus the crossed levers 11, 11 'to pivot towards each other.
  • the switching contacts 8 forming the pre-contact system When switching on, against the spring force in the switching device accommodated under a hood 9, the switching contacts 8 forming the pre-contact system, which can be single or double, are closed before the Main contacts 3a, 3b and 4 of the disconnector touch.
  • the spring 7 between the contact brackets 6a, 6b which can be pivoted like pliers about the attachment point 10, ensures that these follow the moving main contacts 3a, 3b of the scissors 2 and thereby the separation of the switching contacts 8 after the main contacts 3a, 3b have separated with the subsequent arc quenching in the extinguishing tube 12.
  • FIGS. 3, 3a and 3b show a pre-contact system which replaces the switching contacts 8a and 8b in FIG. 2. This results in the embodiment according to the invention.
  • Fig. 3 shows the pre-contact system in the closed position. If the main contacts (not shown) carry current in the switched-on position of the disconnector, the likewise closed contacts of a first 15, 16 and second contact device 13, 14 which form the pre-contact system are electrically parallel to the main contacts. When the disconnector is opened after the main contacts mentioned have separated, the current essentially initially shifts to the still closed first contact device with the elastic contact fingers 15 and the movable contact piece 16. After a short stroke, the first contact device 15, 16 also separates ( Fig.
  • the circuit is closed by the first contact device 15, 16, after the contact fingers 15 slide over a conical ramp 25 made of insulating material in the course of the switch-on movement, whereby they receive the pretension required for the required contact load, and finally in contact with the Contact path of the contact piece 16 arrive (Fig. 3). Only after this contact has been made does the tear-off pin 13 located inside the extinguishing tube 23 come into contact with the contact 14, so that no welding can occur here.
  • An electrically high-quality plastic with a low coefficient of friction such as e.g. an acetal resin can be used.
  • a copper alloy with good erosion resistance can be used as the contact surface for the contact piece 16.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

1. High-voltage isolating switch with a) movable main contact members (3a, 3b) arranged at the ends of a scissors (2) movable in vertical direction, b) a main contact member firmly mounted as countercontact member (4) at the conductor cable (5) of the high-voltage line, c) a preliminary contact system, which is arranged at the countercontact member (4) and which during switching-on closes before the main contact members (3a, 3b, 4) and during switching-off opens after the main contact members (3a, 3b, 4), d) an actuating equipment for the preliminary contact system with two contact collectors (6a, 6b), which are constructed as levers (11, 11') which are crossed in the region of their fastening points (10) at the countercontact (4) and pivotable one towards the other in the manner of pliers against the force of a splaying spring (7) and the ends of which remote from the movable main contact members (3a, 3b) are associated with the one contact members (13, 16) of the preliminary contact system, while the other contact members (14, 15) of the preliminary contact system are arranged by way of a common contact carrier (30) in such a manner between the crossed levers (11, 11') at the countercontact member (4), that they are made contact with by the contact members (13, 16) associated with the crossed levers (11, 11'), when the switching-on of the main contact members (2) has the effect that the contact collectors (6a, 6b) and thereby the crossed levers (11, 11') pivot one towards the other, and with e) a division of the preliminary contact system into a first contact equipment (15, 16) and a second contact equipment (13, 14) connected in parallel with the first, wherein the first contact equipment (15, 16) opens shortly before the second contact equipment (13, 14) during the switching-off movement of the isolating switch and closes shortly before second contact equipment (13, 14) during the switching-on movement and wherein precautions are taken, which have the effect that the contact member (14), which is arranged at the countercontact member (4), of the second contact equipment (13, 14) is released by the contact member (13) associated with the crossed levers (11, 11') during a predetermined contact stroke only after the charging of an energy store (19) and snaps back into the switched-off setting.

Description

Die Erfindung betrifft einen Hochspannungstrennschalter mit an den Enden einer in vertikaler Richtung bewegbaren Schere angeordneten, beweglichen Hauptkontaktstücken, einem am Leiterseil der Hochspannungsleitung fest montierten Hauptkontaktstück als Gegenkontaktstück sowie Vorkontakten.The invention relates to a high-voltage isolating switch with movable main contact pieces arranged at the ends of a pair of scissors that can be moved in the vertical direction, a main contact piece that is fixedly mounted on the conductor cable of the high-voltage line as a counter-contact piece, and preliminary contacts.

Bei einem aus der DE-A-2 809 499 bekannten Hochspannungstrennschalter schließen beim Einschalten die Vorkontakte vor den Hauptkontakten und öffnen nach diesen beim Abschalten. Auf diese Weise erfolgt das Schließen oder Öffnen der Hauptkontakte stromlos. Ein solches Ein- bzw. Ausschaltverhalten der Trennschalter ist erforderlich, obwohl diese nur für Schaltungen im Leerlauf ausgelegt sind, sowie Potentialdifferenzen in Folge von Kapazitäten in Leitungen auftreten, die nicht im Stromkreis liegen.In a high-voltage isolating switch known from DE-A-2 809 499, the pre-contacts close before the main contacts when they are switched on and open when they are switched off. In this way, the main contacts are closed or opened without current. Such switch-on and switch-off behavior of the isolating switches is necessary, although they are only designed for circuits in idle mode, and potential differences occur as a result of capacitances in lines that are not in the circuit.

Die Schaltgeschwindigkeit dieses Hochspannungstrennschalters ist relativ gering, und zwar der Hauptkontaktstücke genauso wie der Vorkontaktstücke. Es wird also lediglich eine Verlagerung des Abbrandes auf die Vorkontaktstücke erzielt. Der Abbrand selbst kann durch die geringe Schaltgeschwindigkeit nicht verringert werden, so daß die Lebensdauer der Vorkontaktstücke begrenzt ist.The switching speed of this high-voltage disconnector is relatively low, namely that of the main contact pieces as well as the pre-contact pieces. It is therefore only a shift of the erosion to the pre-contact pieces. The erosion itself can not be reduced by the low switching speed, so that the life of the pre-contact pieces is limited.

Des weiteren sind aus der DE-B-1 240 158 sowie aus der De-B-1 240 973 Lasttrennschalter mit Hauptkontakten und nach den Hauptkontakten öffnenden Kontakten für das Abreißen des Lichtbogens bekannt. Bei diesen Lasttrennschaltern wird bei der Endabschaltung ein Energiespeicher aufgeladen, um nach einem bestimmten Hub die Kontaktstücke zur Abreißung des Lichtbogens freizugeben, die dann in ihre Ausgangsstellung zurückschnellen. Auch der Einbau von gasabgebendem Material für die Löschung des Lichtbogens ist aus diesen Schriften bekannt.Furthermore, from DE-B-1 240 158 and from De-B-1 240 973 switch disconnectors with main contacts and contacts which open after the main contacts for tearing off the arc are known. With these switch disconnectors, an energy store is charged during the final shutdown in order to release the contact pieces after a certain stroke in order to break the arc, which then snap back into their starting position. The installation of gas-emitting material for extinguishing the arc is also known from these documents.

Diese Lasttrennschalter dienen der Abschaltung von Mittelspannung unter Last, wobei jedoch die abzuschaltenden Spannungen und Ströme mit dem Hochspannungsbereich nicht zu vergleichen sind. Für die Scherentrennschalter zur lastlosen Schaltung von Hochspannungsleitungen glaubte man bisher, auf einen solchen Aufwand verzichten zu können, was sich jedoch durch höhere Anforderungen in der Praxis änderte.These switch disconnectors are used to switch off medium voltage under load, but the voltages and currents to be switched off cannot be compared with the high voltage range. Until now, it was believed that the scissor-type circuit breakers for the no-load switching of high-voltage lines could do without such an effort, but this changed in practice due to higher requirements.

Der Erfindung liegt die Aufgabe zugrunde, einen Hochspannungstrennschalter verfügbar zu machen, bei dem sich beim Ausschalten - unabhängig von der Geschwindigkeit der Hauptkontaktstücke - die Kontaktstücke des Vorkontaktsystems mit vorgegebener Geschwindigkeit trennen.The object of the invention is to make available a high-voltage isolating switch in which, when switched off, the contact pieces of the pre-contact system separate at a predetermined speed, regardless of the speed of the main contact pieces.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst.This object is achieved by the features of claim 1.

Dabei wurde der von der nachveröffentlichten EP-A-0104599 (welche einen Stand der Technik gemäß Art. 54 Abs. 3 EPÜ enthält, da der Prioritätstag der entsprechenden Anmeldung vor dem der dem vorliegenden Patent zugrundeliegenden Anmeldung liegt) vorgeschlagene Hochspannungstrennschalter, der die Merkmale der Abschnitte a) bis d) des Anspruchs 1 aufweist, weiterentwickelt. Der Vorteil der Erfindung besteht darin, daß die Bedingungen für die Unterbrechung der Ströme optimiert sowie der Kontaktabbrand verringert wird.The high-voltage circuit breaker proposed by the subsequently published EP-A-0104599 (which contains a prior art in accordance with Art. 54 (3) EPC, since the priority date of the corresponding application lies before that of the application on which the present patent is based), which has the features of Sections a) to d) of claim 1 further developed. The advantage of the invention is that the conditions for the interruption of the currents are optimized and the contact erosion is reduced.

Die im Abschnitt e des Anspruchs 1 genannte erste Kontakteinrichtung ist so gestaltet, daß sie, auch bei langsamer Bewegung, schnell vom Zustand der ersten Berührung mit der Kontaktlast 0 in den Zustand der vollen Stromtragfähigkeit mit entsprechender Kontaktlast kommt. Dadurch entstehen keine Probleme bei der Einschaltung des Trenners durch die langsame («schleichende») Einschaltung der Kontakte der im Abschnitt e des Anspruchs 1 genannten zweiten Kontakteinrichtung, da die erste Kontakteinrichtung kurz bevor sich die Kontakte der zweiten Kontakteinrichtung berühren, den Stromkreis einschaltet und so die Kontakte der zweiten Kontakteinrichtung vor der Verschmorung schützt.The first contact device mentioned in section e of claim 1 is designed in such a way that, even with slow movement, it quickly comes from the state of the first contact with the contact load 0 to the state of full current carrying capacity with a corresponding contact load. This causes no problems when switching on the isolator due to the slow ("creeping") switching on of the contacts of the second contact device mentioned in section e of claim 1, since the first contact device switches on the circuit just before the contacts of the second contact device touch and so on protects the contacts of the second contact device from scorching.

Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.Further developments of the invention can be found in the subclaims.

In der Zeichnung zeigen schematisch:

  • Fig. 1 einen bekannten Scheren- oder Pantographentrenner,
  • Fig. 2 die Kontaktanordnung des in der EP-A-0 104 599 beschriebenen Trennschalters mit Vor-und Hauptkontaktstücken,
  • Fig. 3 ein Kontaktsystem, das die Vorkontaktstücke der Fig. 2 ersetzt sowie
  • Fig. 3a, 3b das Kontaktsystem nach Fig. 3 in verschiedenen Schaltstellungen.
The drawing shows schematically:
  • 1 a known scissors or pantograph separator,
  • 2 shows the contact arrangement of the disconnector described in EP-A-0 104 599 with front and main contact pieces,
  • Fig. 3 shows a contact system which replaces the pre-contact pieces of Fig. 2 as well
  • 3a, 3b, the contact system of FIG. 3 in different switching positions.

Bei dem Scheren- und Pantographentrenner nach den Figuren 1 und 2, der im wesentlichen aus einer Porzellansäule 1 und einer in vertikaler Richtung bewegbaren Schere 2 mit den Hauptkontaktstücken 3a, 3b besteht, sind an dem oberen, am Leiterseil 5 fest montierten Gegenkontakt 4 zwei zangenartig um einen Befestigungspunkt 10 schwenkbare Kontaktbügel 6a, 6b angeordnet, die bei geöffnetem Trenner durch die Kraft einer Feder 7 in einer gespreizten Position in gewissem Abstand von dem Gegenkontakt 4 gehalten werden. Die Kontaktstücke 8b der das Vorkontaktsystem bildenden zusätzlichen Schaltkontakte 8 sind an den den Hauptkontaktstücken 3a, 3b abgewandten Enden der an den schwenkbaren Kontaktbügeln 6a, 6b ausgebildeten gekreuzten Hebel 11, 11' angeordnet. Die von dem Gegenkontaktstück 4 getragenen Kontaktstücke 8a der zusätzlichen Schaltkontakte 8 sind an einem gemeinsamen Kontaktträger 30 derart zwischen den gekreuzten Hebeln 11, 11' angeordnet, daß sie von den von diesen Hebeln 11, 11' getragenen Kontaktstücken 8b der zusätzlichen Schaltkontakte 8 kontaktiert werden, wenn das Einschalten der Hauptkontaktstücke 3a, 3b bewirkt, daß die Kontaktbügel 6a, 6b und damit die gekreuzten Hebel 11, 11' aufeinanderzuschwenken.In the scissors and pantograph separator according to FIGS. 1 and 2, which essentially consists of a porcelain column 1 and a scissors 2 that can be moved in the vertical direction with the main contact pieces 3a, 3b, two pliers-like contacts are provided on the upper mating contact 4 fixedly attached to the conductor cable 5 about a fastening point 10 pivotable contact bracket 6a, 6b arranged, which are held by the force of a spring 7 in a spread position at a certain distance from the counter contact 4 by the force of a spring. The contact pieces 8b of the additional switching contacts 8 forming the pre-contact system are arranged on the ends of the crossed levers 11, 11 'formed on the pivotable contact brackets 6a, 6b, facing away from the main contact pieces 3a, 3b. The contact pieces 8a of the additional switching contacts 8 carried by the counter-contact piece 4 are arranged on a common contact carrier 30 between the crossed levers 11, 11 'such that they are contacted by the contact pieces 8b of the additional switching contacts 8 carried by these levers 11, 11', when switching on the main contact pieces 3a, 3b causes the contact bracket 6a, 6b and thus the crossed levers 11, 11 'to pivot towards each other.

Beim Einschalten werden entgegen der Federkraft in der unter einer Haube 9 untergebrachten Schalteinrichtung die das Vorkontaktsystem bildenden Schaltkontakte 8, die einfach oder doppelt vorhanden sein können, geschlossen, bevor die Hauptkontakte 3a, 3b und 4 des Trennschalters sich berühren. Beim Ausschalten sorgt die Feder 7 zwischen den zangenartig um den Befestigungspunkt 10 schwenkbaren Kontaktbügeln 6a, 6b dafür, daß diese den sich bewegenden Hauptkontakten 3a, 3b der Schere 2 folgen und hierdurch die zeitlich nach der Kontakttrennung der Hauptkontakte 3a, 3b liegende Trennung der Schaltkontakte 8 mit der anschließenden Lichtbogenlöschung im Löschrohr 12 herbeiführen.When switching on, against the spring force in the switching device accommodated under a hood 9, the switching contacts 8 forming the pre-contact system, which can be single or double, are closed before the Main contacts 3a, 3b and 4 of the disconnector touch. When the device is switched off, the spring 7 between the contact brackets 6a, 6b, which can be pivoted like pliers about the attachment point 10, ensures that these follow the moving main contacts 3a, 3b of the scissors 2 and thereby the separation of the switching contacts 8 after the main contacts 3a, 3b have separated with the subsequent arc quenching in the extinguishing tube 12.

In den Figuren 3, 3a und 3b ist ein Vorkontaktsystem dargestellt, welches an die Stelle der Schaltkontakte 8a und 8b der Fig. 2 tritt. Dadurch ergibt sich das Ausführungsbeispiel gemäß der Erfindung.FIGS. 3, 3a and 3b show a pre-contact system which replaces the switching contacts 8a and 8b in FIG. 2. This results in the embodiment according to the invention.

Fig. 3 zeigt das Vorkontaktsystem in geschlossener Stellung. Wenn die nicht dargestellten Hauptkontakte in der eingeschalteten Stellung des Trenners Strom führen, liegen die ebenfalls geschlossenen Kontakte einer das Vorkontaktsystem bildenden ersten 15,16 und zweiten Kontakteinrichtung 13, 14 in elektrischer Hinsicht parallel zu den Hauptkontakten. Beim Öffnen des Trenners, nachdem die erwähnten Hauptkontakte sich getrennt haben, verlagert sich der Strom im wesentlichen zunächst auf die noch geschlossene erste Kontakteinrichtung mit den elastischen Kontaktfingern 15 und dem beweglichen Kontaktstück 16. Nach einem kurzen Hub trennt die erste Kontakteinrichtung 15, 16 ebenfalls (Fig. 3a) und der auszuschaltende Strom fließt jetzt nur noch über die Kontaktstücke 13, 14 der zweiten Kontakteinrichtung, nämlich über den mit dem Kontaktstück 16 fest verbundenen Abreißstift 13 und den im Gehäuse axial beweglich gelagerten Kontakt 14. Bei weiter fortschreitender Ausschaltbewegung wird wegen der formschlüssigen Verklammerung dieser beiden Kontaktstücke 13 und 14 über den mit dem Kontakt 14 fest verbundenen Federteller 18 die Rückholfeder 19 gespannt, bis beim Überschreiten des Haltevermögens die Verklammerung die Kontaktstücke 13, 14 sich trennen und der Kontakt 14 schnell in seiner Ausgangsposition am Anschlag 20 zurückeilt (Fig. 3b). Hierbei entsteht zwischen dem Kontakt 14 und dem Abreißstift 13 ein Schaltlichtbogen. Dieser Lichtbogen brennt innerhalb eines Löschrohres 23 zwischen den Löschbacken 24 aus gasabgebendem Isolierstoff, wodurch der Lichtbogen innerhalb weniger Millisekunden gelöscht und damit der Stromkreis endgültig aufgetrennt wird.Fig. 3 shows the pre-contact system in the closed position. If the main contacts (not shown) carry current in the switched-on position of the disconnector, the likewise closed contacts of a first 15, 16 and second contact device 13, 14 which form the pre-contact system are electrically parallel to the main contacts. When the disconnector is opened after the main contacts mentioned have separated, the current essentially initially shifts to the still closed first contact device with the elastic contact fingers 15 and the movable contact piece 16. After a short stroke, the first contact device 15, 16 also separates ( Fig. 3a) and the current to be switched off now flows only via the contact pieces 13, 14 of the second contact device, namely via the tear-off pin 13 which is fixedly connected to the contact piece 16 and the contact 14 which is mounted in an axially movable manner in the housing positive clamping of these two contact pieces 13 and 14 via the spring plate 18 firmly connected to the contact 14, the return spring 19 tensioned until the holding capacity is exceeded, the contact pieces 13, 14 separate and the contact 14 quickly hurries back in its starting position at the stop 20 ( 3b). This creates a switching arc between the contact 14 and the tear-off pin 13. This arc burns within an extinguishing tube 23 between the extinguishing jaws 24 made of gas-emitting insulating material, as a result of which the arc is extinguished within a few milliseconds and the circuit is thus finally opened.

Beim Einschalten des Trenners übernimmt das Schließen des Stromkreises die erste Kontakteinrichtung 15, 16, nachdem im Zuge der Einschaltbewegung die Kontaktfinger 15 über eine konische Auflaufschräge 25 aus Isolierstoff hinweggleiten, wobei sie die für die erforderliche Kontaktlast nötige Vorspannung erhalten, und schließlich in Berührung mit der Kontaktbahn des Kontaktstükkes 16 gelangen (Fig. 3). Erst nach dieser Kontaktgabe kommt der im Inneren des Löschrohres 23 liegende Abreißstift 13 mit dem Kontakt 14 in Berührung, so daß hier keine Verschweißung auftreten kann.When the isolator is switched on, the circuit is closed by the first contact device 15, 16, after the contact fingers 15 slide over a conical ramp 25 made of insulating material in the course of the switch-on movement, whereby they receive the pretension required for the required contact load, and finally in contact with the Contact path of the contact piece 16 arrive (Fig. 3). Only after this contact has been made does the tear-off pin 13 located inside the extinguishing tube 23 come into contact with the contact 14, so that no welding can occur here.

Für die Auflaufschräge 25 kann ein elektrisch hochwertiger Kunststoff mit niedrigem Reibungsbeiwert wie z.B. ein Acetalharz verwendet werden. Als Kontaktfläche für das Kontaktstück 16 kann eine Kupferlegierung mit guter Abbrandfestigkeit eingesetzt werden.An electrically high-quality plastic with a low coefficient of friction such as e.g. an acetal resin can be used. A copper alloy with good erosion resistance can be used as the contact surface for the contact piece 16.

Claims (7)

1. High-voltage isolating switch with
a) movable main contact members (3a, 3b) arranged at the ends of a scissors (2) movable in vertical direction,
b) a main contact member firmly mounted as countercontact member (4) at the conductor cable (5) of the high-voltage line,
c) a preliminary contact system, which is arranged at the countercontact member (4) and which during switching-on closes before the main contact members (3a, 3b, 4) and during switching-off opens after the main contact members (3a, 3b, 4),
d) an actuating equipment for the preliminary contact system with two contact collectors (6a, 6b), which are constructed as levers (11, 11'), which are crossed in the region of their fastening points (10) at the countercontact (4) and pivotable one towards the other in the manner of pliers against the force of a splaying spring (7) and the ends of which remote from the movable main contact members (3a, 3b) are associated with the one contact members (13, 16) of the preliminary contact system, while the other contact members (14, 15) of the preliminary contact system are arranged by way of a common contact carrier (30) in such a manner between the crossed levers (11, 11') at the countercontact member (4), that they are made contact with by the contact members (13, 16) associated with the crossed levers (11, 11'), when the switching-on of the main contact members (2) has the effect that the contact collectors (6a, 6b) and thereby the crossed levers (11, 11') pivot one towards the other, and with
e) a division of the preliminary contact system into a first contact equipment (15,16) and a second contact equipment (13, 14) connected in parallel with the first, wherein the first contact equipment (15, 16) opens shortly before the second contact equipment (13, 14) during the switching-off movement of the isolating switch and closes shortly before second contact equipment (13, 14) during the switching-on movement and wherein precautions are taken, which have the effect that the contact member (14), which is arranged at the countercontact member (4), of the second contact equipment (13, 14) is released by the contact member (13) associated with the crossed levers (11, 11') during a predetermined contact stroke only after the charging of an energy store (19) and snaps back into the switched-off setting.
2. Isolating switch according to claim 1, characterised thereby, that the entrainment of the contact member (14), which is arranged at the countercontact member (4), of the second contact equipment (13, 14) takes place through a shape-locking clamping together with the contact member (13) associated with the crossed levers (11, 11').
3. Isolating switch according to claim 1 or 2, characterised thereby, that a spring (19), which is arranged between a spring plate (18) and the housing (17) of the second contact equipment (13, 14), is provided as energy store for the contact member (14) arranged at the countercontact (4).
4. Isolating switch according to one of the claims 1 to 3, characterised thereby, that the contact member (13), which is associated with the crossed levers (11, 11'), of the second contact equipment (13, 14) is guided in a tubular body (24) liberating gas under the effect of an arc.
5. Isolating switch according to one of the claims 1 to 4, characterised thereby, that the contact member (15), which is arranged at the countercontact (4), of the first contact equipment (15, 16) consists of one or more elastic contact fingers and the contact member (16) associated with the crossed levers (11, 11') displays a planar metallic contact surface, in front of which a conical insulating material member (25) is borne, over which the elastic contact fingers (15) slide onto the metallic surface during switching-on.
6. Isolating switch according to claim 5, characterised thereby, that the conical insulating member consists of acetal resin.
7. Isolating switch according to claim 5, characterised thereby, that the contact surfaces of the first contact equipment (15, 16) associated with the crossed levers (11, 11') consist of a copper alloy of good erosion resistance.
EP84109850A 1983-08-27 1984-08-18 High-voltage isolating switch, in particular a pantograph isolating switch able to make or break currents Expired EP0135789B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84109850T ATE44422T1 (en) 1983-08-27 1984-08-18 HIGH-VOLTAGE DISCONNECTING SWITCHES, IN PARTICULAR SINGLE-POLE DISCONNECTING SWITCHES, FOR SWITCHING COMMUTING CURRENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3331024 1983-08-27
DE3331024A DE3331024A1 (en) 1983-08-27 1983-08-27 HIGH VOLTAGE DISCONNECTOR, ESPECIALLY SINGLE-COLUMN DISCONNECTOR, FOR SWITCHING COMMUTING CURRENTS

Publications (3)

Publication Number Publication Date
EP0135789A2 EP0135789A2 (en) 1985-04-03
EP0135789A3 EP0135789A3 (en) 1986-10-29
EP0135789B1 true EP0135789B1 (en) 1989-07-05

Family

ID=6207654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109850A Expired EP0135789B1 (en) 1983-08-27 1984-08-18 High-voltage isolating switch, in particular a pantograph isolating switch able to make or break currents

Country Status (3)

Country Link
EP (1) EP0135789B1 (en)
AT (1) ATE44422T1 (en)
DE (2) DE3331024A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3709664A1 (en) * 1987-03-24 1988-10-06 Bbc Brown Boveri & Cie MULTI-POSITION COMMUTING ISOLATOR FOR HIGH AND MEDIUM VOLTAGE SWITCHGEAR
FR2674678B1 (en) * 1991-03-29 1996-09-20 Const Electro Meca Ste D HIGH-VOLTAGE DISCONNECTOR CAPABLE OF ESTABLISHING AND CUTTING BAR TRANSFER CURRENTS IN A LOOP CIRCUIT.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE946638C (en) * 1951-04-06 1956-08-02 Sachsenwerk Licht & Kraft Ag Slide disconnector for additional load disconnection
DE1240973B (en) * 1958-11-15 1967-05-24 Sachsenwerk Licht & Kraft Ag Switch disconnectors
DE1240158B (en) * 1960-12-10 1967-05-11 Sachsenwerk Licht & Kraft Ag Switch disconnectors
DE1941383C3 (en) * 1969-08-14 1974-08-22 Felten & Guilleaume Schaltanlagen Gmbh, 4150 Krefeld Switch-disconnector with gas-emitting pipe extinguishing chamber
DE2809499A1 (en) * 1978-03-06 1979-09-13 Licentia Gmbh HV single column circuit breaker - has on one contact resilient advance contacts, making before main contacts and breaking after them
DE2907574C2 (en) * 1979-02-27 1984-05-17 Concordia Sprecher-Schaltgeräte GmbH, 7024 Filderstadt Extinguishing chamber
DE3111793A1 (en) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München SWITCH DISCONNECTOR WITH A SWIVELING SWITCHING ARM AND WITH A DELETING DEVICE
DE3122442A1 (en) * 1981-06-02 1982-12-23 Siemens AG, 1000 Berlin und 8000 München DISCONNECTOR FOR HIGH VOLTAGE SYSTEMS

Also Published As

Publication number Publication date
DE3331024A1 (en) 1985-03-14
DE3478883D1 (en) 1989-08-10
ATE44422T1 (en) 1989-07-15
EP0135789A2 (en) 1985-04-03
EP0135789A3 (en) 1986-10-29

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