EP0070248B1 - Isolating switch - Google Patents

Isolating switch Download PDF

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Publication number
EP0070248B1
EP0070248B1 EP82730078A EP82730078A EP0070248B1 EP 0070248 B1 EP0070248 B1 EP 0070248B1 EP 82730078 A EP82730078 A EP 82730078A EP 82730078 A EP82730078 A EP 82730078A EP 0070248 B1 EP0070248 B1 EP 0070248B1
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EP
European Patent Office
Prior art keywords
switching pin
auxiliary
auxiliary switching
control element
contact piece
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
EP82730078A
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German (de)
French (fr)
Other versions
EP0070248A3 (en
EP0070248A2 (en
Inventor
Dieter Dipl.-Ing. Lorenz
Benno Ing. Grad. Rehaag
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0070248A2 publication Critical patent/EP0070248A2/en
Publication of EP0070248A3 publication Critical patent/EP0070248A3/en
Application granted granted Critical
Publication of EP0070248B1 publication Critical patent/EP0070248B1/en
Expired legal-status Critical Current

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    • 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
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
    • 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

Definitions

  • the invention relates to an isolating switch with a fixed, tubular contact piece and a movable, tubular switching pin, which is guided in a fixed outer part and contains in its interior a spring contactable, relative to the switching pin movable auxiliary switching pin, which with an auxiliary contact piece of the fixed contact piece is connectable.
  • a known disconnector of this type (Siemens operating instructions SW 8378-220 «3CB switch disconnector, 10 kV", pages 102/1 to 102/3) is designed as a switch disconnector and has an auxiliary switching pin, so that when the switch-off movement occurs, an arc is only between a so-called Sliding contact and a burn-off ring of the switching pin is formed because this arc splits gas from the insulating material of the fixed outer part, which escapes from the extinguishing pot with vigorous flow while deionizing the switching path not provided, so that a galvanic connection via the auxiliary switching pin must be maintained between these two contact elements until the switching path is interrupted after the arc has been extinguished, after which the auxiliary switching pin is removed from the auxiliary contact piece of the fixed one Torn out the contact piece so that the disconnector is visibly opened.
  • the object of the invention is to propose a circuit breaker which, even in the case of a version for higher voltages and the large separation distances required, has short flashover times without requiring a particularly fast-operating drive.
  • flashover is understood to mean the time during which an arc occurs between the fixed contact piece and the movable switching pin during the switching process.
  • the switching pin has at its front end facing the contact piece a pawl which interacts with a shoulder at the front end of the auxiliary switching pin; on the Au part, a further pawl is held, which interacts with an extension at the rear end of the auxiliary switching pin, and in the switching pin a control element is arranged to be longitudinally movable, between which and the extensions of the auxiliary switching pin there is a spring; the control element is connected to the switching pin via a translating drive and the pawls are actuated.
  • a major advantage of the isolating switch according to the invention is that, when the auxiliary switching pin is switched on, it comes into connection with the auxiliary contact piece much faster than the switching pin with the fixed contact piece, which considerably shortens the pre-flashover time when the switch is turned on. The same applies to the switch-off process because contact between the auxiliary switching pin and the auxiliary contact piece is maintained for a certain time after the separation between the switching pin and the contact piece and then the auxiliary switching pin is suddenly released from the auxiliary contact piece under the action of a spring.
  • a further advantage is seen in the fact that the shortening of the rollover times can be achieved with a previously relatively slow drive, so that it can remain with the use of an inexpensive, slow drive.
  • the translating drive can be designed in different ways, for example consist of a toothed drive.
  • the translating drive is a cable drive and contains two deflection rollers which are mounted on the switching pin at a predetermined axial distance from one another; a rope is attached at one end to a point in the area of the rear end of the auxiliary switching pin of the outer part, around the point further away a guide roller and then around the other guide roller closer and finally with its other end at an open state the isolating switch of a point of the outer part which is adjacent to a deflecting roller and is located between the deflecting rollers; the control element is connected to the section of the cable that lies between the deflection rollers when the disconnector is open.
  • control element of the disconnector according to the invention can also be designed differently; It is considered to be particularly advantageous if the control element consists of a disk-shaped part sliding on the auxiliary switching pin and an actuating part for the pawls attached at right angles thereto.
  • the illustrated embodiment has a switching pin 1, which is in a fixed Outer part 2 is kept longitudinally movable.
  • a fixed contact piece 3 is arranged opposite the switching pin 1.
  • the distance between the fixed outer part 2 and the fixed contact piece 3 is referred to as the separation distance T.
  • An auxiliary switching pin 4 is arranged to be longitudinally movable within the switching pin 1.
  • the auxiliary switching pin 4 is provided at its front end 5 facing the fixed contact piece 3 with a shoulder 6; the auxiliary switching pin 4 has a similar approach 7 at its rear end 8.
  • a control element 9 is also slidably arranged on the auxiliary switching pin 4. This control element 9 is provided with a disk-shaped part 10 to which an actuating part 11 extending at right angles thereto is attached.
  • the control element 9 is fastened with its upper end in the illustration 1 to a section 12 of a rope 13.
  • This rope 13 is attached with its one end 14 to an attachment point 15 which lies on the fixed outer part 2.
  • the rope is guided around a deflection roller 16 which is attached to the switching pin 1 in the vicinity of the front end thereof.
  • the cable 13 is guided around a further deflection roller 17 which is mounted on the switching pin 1 at a predetermined axial distance from the one deflection roller 16.
  • the rope runs from the further deflection roller 17 to a fastening point 18 which, like the fastening point 15, lies on the outer part 2.
  • the fastening point 18 is in the switched-off state of the disconnector near one deflection roller 16, but in the area between the two deflection rollers 16 and 17.
  • auxiliary switching pin 4 On the auxiliary switching pin 4 there are two springs 19 and 20, each lying between the disk-shaped part 10 of the control element 9 and the lugs 6 and 7 of the auxiliary switching pin 4.
  • a pawl 21 is articulated on the switching pin 1 and is pressed in the direction of the auxiliary switching pin 4 by means of a compression spring 22.
  • Another pawl 23 is articulated on the outer part 2 and is also pressed in the direction of the auxiliary switching pin 4 by a further compression spring 24. Both pawls 21 and 23 are arranged so that they are in the working area of the actuating part 11 of the control element 9.
  • circuit breaker According to the invention, reference is made to the further representations of the figure, in which the circuit breaker is shown in its various states.
  • the illustration 2 shows that due to an external actuation, not shown, of the switching pin 1, this has been moved a little to the right in the direction of the fixed contact piece 3, the control element 9 having been moved to the right by the cable 13 so that due to the tension of the spring 19 caused thereby, the shoulder 6 of the auxiliary switching pin 4 is pressed against a stop 25 of the pawl 21.
  • the spring 19 is tensioned more and more because, because of the cable drive, the control element travels twice as far as the switching pin 1.
  • the control element 9 finally arrives in a position such as that shown in FIG. 3.
  • the switching pin 1 is moved even further in the direction of the fixed contact piece 3, then the attachment point of the disk-shaped part 10 of the control element 9 is guided around the one deflection roller 16 and finally assumes a position as shown in FIG. 5. As a result, the auxiliary switching pin is pushed even further into the auxiliary contact piece. If the switching pin 1 is pushed even further forward, the control element no longer moves forward, but remains in the position shown in FIG. 5; the switching pin 1, however, comes into engagement with the fixed contact piece 3, and the switch-on movement is ended; the disconnector is closed. This is shown in illustration 6 of the figure.
  • the auxiliary switching pin 4 therefore snaps back in the direction of arrow 30, as a result of which the galvanic connection between its front end and the auxiliary contact piece, not shown, is broken. This is shown in Figure 9. If - as shown in illustration 10 - the switching pin 1 is returned to its starting position, then the control element 9 also returns to its original position; the auxiliary switching pin 4 is also located with its front end inside the switching pin 1.
  • the control element can be driven twice as fast as the switching pin to a certain position, whereby the auxiliary switching pin is brought under the pretension of a spring and suddenly makes contact when released, long before the switching pin comes into contact with the stationary contact piece has reached. In this way, a short pre-rollover time is reached when switching on.
  • the movement of the control element with respect to the switching pin is initially delayed in the disconnector according to the invention, and then a further spring is preloaded, which after triggering this spring can cause an interruption in the contact between the auxiliary switching pin and the auxiliary contact piece at a time when the Switch pin has largely moved away from the fixed contact piece.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Push-Button Switches (AREA)

Description

Die Erfindung bezieht sich auf einen Trennschalter mit einem feststehenden, rohrförmigen Kontaktstück und einem bewegbaren, rohrförmigen Schaltstift, der in einem feststehenden Außenteil geführt ist und in seinem Innern einen unter Federwirkung bringbaren, relativ zum Schaltstift bewegbaren Hilfsschaltstift enthält, der mit einem Hilfskontaktstück des feststehenden Kontaktstückes verbindbar ist.The invention relates to an isolating switch with a fixed, tubular contact piece and a movable, tubular switching pin, which is guided in a fixed outer part and contains in its interior a spring contactable, relative to the switching pin movable auxiliary switching pin, which with an auxiliary contact piece of the fixed contact piece is connectable.

Ein bekannter Trennschalter dieser Art (Siemens-Betriebsanleitung SW 8378-220 «Lasttrennschalter 3CB, 10 kV", Seiten 102/1 bis 102/3) ist als Lasttrennschalter ausgebildet und weist einen Hilfsschaltstift auf, damit bei der Ausschaltbewegung ein Lichtbogen nur zwischen einem sogenannten Gleitschaltstück und einem Abbrennring des Schaltstiftes gebildet wird, weil durch diesen Lichtbogen Gas aus dem Isolierstoff des feststehenden Außenteiles abgespalten wird, das unter Entionisierung der Schaltstrecke mit kräftiger Strömung aus dem Löschtopf entweicht. Eine Löschvorrichtung ist bei dem bekannten Lasttrennschalter zwischen dem feststehenden Kontaktstück und dem Schaltstift nicht vorgesehen, so daß zwischen diesen beiden Kontaktelementen beim Ausschalten eine galvanische Verbindung über den Hilfsschaltstift so lange aufrecht erhalten werden muß, bis die Schaltstrecke nach Löschung des Lichtbogens unterbrochen ist. Danach wird der Hilfsschaltstift aus dem Hilfskontaktstück des feststehenden Kontaktstückes herausgerissen, so daß der Trennschalter sichtbar aufgetrennt ist.A known disconnector of this type (Siemens operating instructions SW 8378-220 «3CB switch disconnector, 10 kV", pages 102/1 to 102/3) is designed as a switch disconnector and has an auxiliary switching pin, so that when the switch-off movement occurs, an arc is only between a so-called Sliding contact and a burn-off ring of the switching pin is formed because this arc splits gas from the insulating material of the fixed outer part, which escapes from the extinguishing pot with vigorous flow while deionizing the switching path not provided, so that a galvanic connection via the auxiliary switching pin must be maintained between these two contact elements until the switching path is interrupted after the arc has been extinguished, after which the auxiliary switching pin is removed from the auxiliary contact piece of the fixed one Torn out the contact piece so that the disconnector is visibly opened.

Die Erfindung stellt sich die Aufgabe, einen Trennschalter vorzuschlagen, der auch bei einer Ausführung für höhere Spannungen und den dabei notwendigen großen Trennstrecken kurze Vorüberschlagszeiten aufweist, ohne eines besonders schnell arbeitenden Antriebs zu bedürfen. Dabei wird unter Vorüberschlagszeit die Zeit verstanden, während ein Lichtbogen zwischen dem feststehenden Kontaktstück und dem bewegbaren Schaltstift während des Schaltvorganges auftritt.The object of the invention is to propose a circuit breaker which, even in the case of a version for higher voltages and the large separation distances required, has short flashover times without requiring a particularly fast-operating drive. The term flashover is understood to mean the time during which an arc occurs between the fixed contact piece and the movable switching pin during the switching process.

Zur Lösung dieser Aufgabe trägt bei einem Trennschalter der eingangs angegebenen Art erfindungsgemäß der Schaltstift an seinem dem Kontaktstück zugewandten vorderen Ende eine Klinke, die mit einem Ansatz am vorderen Ende des Hilfsschaltstiftes zusammenwirkt; am Au-Benteil ist eine weitere Klinke gehalten, die mit einem Ansatz am hinteren Ende des Hilfsschaltstiftes zusammenwirkt, und im Schaltstift ist ein Steuerelement längsbewegbar angeordnet, zwischen dem und den Ansätzen des Hilfsschaltstiftes jeweils eine Feder liegt ; das Steuerelement ist über einen übersetzenden Antrieb mit dem Schaltstift verbunden und die Klinken betätigbar geführt.To achieve this object, in a disconnector of the type specified at the outset, according to the invention, the switching pin has at its front end facing the contact piece a pawl which interacts with a shoulder at the front end of the auxiliary switching pin; on the Au part, a further pawl is held, which interacts with an extension at the rear end of the auxiliary switching pin, and in the switching pin a control element is arranged to be longitudinally movable, between which and the extensions of the auxiliary switching pin there is a spring; the control element is connected to the switching pin via a translating drive and the pawls are actuated.

Ein wesentlicher Vorteil des erfindungsgemä-Ben Trennschalters besteht darin, daß bei der Einschaltbewegung der Hilfsschaltstift erheblich schneller in Verbindung mit dem Hilfskontaktstück als der Schaltstift mit dem feststehenden Kontaktstück gelangt, wodurch die Vorüberschlagszeit beim Einschaltvorgang erheblich verkürzt ist. Entsprechendes gilt beim Ausschaltvorgang, weil eine Kontaktgabe zwischen dem Hilfsschaltstift und dem Hilfskontaktstück noch für eine gewisse Zeit nach der Trennung zwischen dem Schaltstift und dem Kontaktstück aufrechterhalten wird und dann erst unter der Einwirkung einer Feder der Hilfsschaltstift schlagartig aus dem Hilfskontaktstück gelöst wird. Ein weiterer Vorteil wird darin gesehen, daß die Verkürzung der Vorüberschlagszeiten mit einem bisher üblichen, verhältnismäßig langsam arbeitenden Antrieb erreicht werden kann, so daß es bei der Verwendung eines kostengünstigen, langsam arbeitenden Antriebs bleiben kann.A major advantage of the isolating switch according to the invention is that, when the auxiliary switching pin is switched on, it comes into connection with the auxiliary contact piece much faster than the switching pin with the fixed contact piece, which considerably shortens the pre-flashover time when the switch is turned on. The same applies to the switch-off process because contact between the auxiliary switching pin and the auxiliary contact piece is maintained for a certain time after the separation between the switching pin and the contact piece and then the auxiliary switching pin is suddenly released from the auxiliary contact piece under the action of a spring. A further advantage is seen in the fact that the shortening of the rollover times can be achieved with a previously relatively slow drive, so that it can remain with the use of an inexpensive, slow drive.

Bei dem erfindungsgemäßen Trennschalter kann der übersetzende Antrieb in unterschiedlicher Weise ausgebildet sein, beispielsweise aus einem Zahnantrieb bestehen. Aus konstruktiven Gründen und im Hinblick auf eine möglichst kostengünstige Herstellung erscheint es jedoch vorteilhafter, wenn der übersetzende Antrieb ein Seiltrieb ist und zwei Umlenkrollen enthält, die am Schaltstift in einem vorgegebenen axialen Abstand voneinander gelagert sind ; ein Seil ist mit seinem einen Ende an einem im Bereich des hinteren Endes des Hilfsschaltstiftes liegenden Punkt des Außenteiles befestigt, um die diesem Punkt ferner liegende eine Umlenkrolle und dann um die näher liegende andere Umlenkrolle geführt und schließlich mit seinem andere Ende an einem im geöffneten Zustand des Trennschalters der einen Umlenkrolle benachbarten, zwischen den Umlenkrollen liegenden Punkt des Außenteiles angebracht; das Steuerelement ist mit dem Abschnitt des Seiles verbunden, der im geöffneten Zustand des Trennschalters zwischen den Umlenkrollen liegt. Damit ist durch einen verhältnismäßig einfach gestalteten Antrieb erreicht, daß sich das Steuerelement unter Zusammendrücken der einen Feder schneller als der Schaltstift bewegt, so daß nach Auslösen der den Hilfsschaltstift an seinem vorderen Ende mittels des Ansatzes haltenden Klinke der Hilfsschaltstift hervorschnellen und eine beschleunigte Kontaktgabe mit dem Hilfskontaktstück bewirken kann.In the disconnector according to the invention, the translating drive can be designed in different ways, for example consist of a toothed drive. For constructional reasons and with a view to manufacturing as inexpensively as possible, however, it appears to be more advantageous if the translating drive is a cable drive and contains two deflection rollers which are mounted on the switching pin at a predetermined axial distance from one another; a rope is attached at one end to a point in the area of the rear end of the auxiliary switching pin of the outer part, around the point further away a guide roller and then around the other guide roller closer and finally with its other end at an open state the isolating switch of a point of the outer part which is adjacent to a deflecting roller and is located between the deflecting rollers; the control element is connected to the section of the cable that lies between the deflection rollers when the disconnector is open. This is achieved by a relatively simple drive that the control element moves faster than the switching pin by compressing one spring, so that after triggering the pawl holding the auxiliary switching pin at its front end by means of the approach, the auxiliary switching pin pops out and accelerated contact with the Auxiliary contact piece can cause.

Das Steuerelement des erfindungsgemäßen Trennschalters kann ebenfalls unterschiedlich ausgebildet sein ; als besonders vorteilhaft wird es angesehen, wenn das Steuerelement aus einem auf dem Hilfsschaltstift gleitenden scheibenförmigen Teil und einem im rechten Winkel dazu angebrachten Betätigungsteil für die Klinken besteht.The control element of the disconnector according to the invention can also be designed differently; It is considered to be particularly advantageous if the control element consists of a disk-shaped part sliding on the auxiliary switching pin and an actuating part for the pawls attached at right angles thereto.

Zur Erläuterung der Erfindung ist in der Figur ein Ausführungsbeispiel des erfindungsgemäßen Trennschalters schematisch in zehn verschiedenen Stellungen gezeigt.To illustrate the invention, an embodiment of the disconnector according to the invention is shown schematically in ten different positions in the figure.

Wie die Darstellung 1 der Figur erkennen läßt, weist das dargestellte Ausführungsbeispiel einen Schaltstift 1 auf, der in einem feststehenden Außenteil 2 längsbewegbar gehalten ist. Dem Schaltstift 1 gegenüber ist ein feststehendes Kontaktstück 3 angeordnet. Die Strecke zwischen dem feststehenden Außenteil 2 und dem feststehenden Kontaktstück 3 wird als Trennstrecke T bezeichnet.As can be seen in the illustration 1 of the figure, the illustrated embodiment has a switching pin 1, which is in a fixed Outer part 2 is kept longitudinally movable. A fixed contact piece 3 is arranged opposite the switching pin 1. The distance between the fixed outer part 2 and the fixed contact piece 3 is referred to as the separation distance T.

Innerhalb des Schaltstiftes 1 ist ein Hilfsschaltstift 4 längsbewegbar angeordnet. Der Hilfsschaltstift 4 ist an seinem dem festen Kontaktstück 3 zugewandten vorderen Ende 5 mit einem Ansatz 6 versehen ; einen ähnlichen Ansatz 7 weist der Hilfsschaltstift 4 an seinem hinteren Ende 8 auf. Auf dem Hilfsschaltstift 4 ist ferner ein Steuerelement 9 gleitbar angeordnet. Dieses Steuerelement 9 ist mit einem scheibenförmigen Teil 10 versehen, an dem ein rechtwinklig dazu verlaufendes Betätigungsteil 11 angebracht ist.An auxiliary switching pin 4 is arranged to be longitudinally movable within the switching pin 1. The auxiliary switching pin 4 is provided at its front end 5 facing the fixed contact piece 3 with a shoulder 6; the auxiliary switching pin 4 has a similar approach 7 at its rear end 8. A control element 9 is also slidably arranged on the auxiliary switching pin 4. This control element 9 is provided with a disk-shaped part 10 to which an actuating part 11 extending at right angles thereto is attached.

Das Steuerelement 9 ist mit seinem in der Darstellung 1 oberen Ende an einem Abschnitt 12 eines Seiles 13 befestigt. Dieses Seil 13 ist mit seinem einen Ende 14 an einem Befestigungspunkt 15 angebracht, der auf dem feststehenden Außenteil 2 liegt. Ausgehend von dem Befestigungspunkt 15 ist das Seil um eine Umlenkrolle 16 geführt, die in der Nähe des vorderen Endes des Schaltstiftes 1 an diesem angebracht ist. Von dieser einen Umlenkrolle 16 ist das Seil 13 um eine weitere Umlenkrolle 17 geführt, die in einem vorgegebenen axialen Abstand von der einen Umlenkrolle 16 auf dem Schaltstift 1 gelagert ist. Von der weiteren Umlenkrolle 17 läuft das Seil zu einem Befestigungspunkt 18, der ebenso wie der Befestigungspunkt 15 auf dem Außenteil 2 liegt. Der Befestigungspunkt 18 befindet sich im ausgeschalteten Zustand des Trennschalters in der Nähe der einen Umlenkrolle 16, aber im Bereich zwischen den beiden Umlenkrollen 16 und 17.The control element 9 is fastened with its upper end in the illustration 1 to a section 12 of a rope 13. This rope 13 is attached with its one end 14 to an attachment point 15 which lies on the fixed outer part 2. Starting from the attachment point 15, the rope is guided around a deflection roller 16 which is attached to the switching pin 1 in the vicinity of the front end thereof. From this one deflection roller 16, the cable 13 is guided around a further deflection roller 17 which is mounted on the switching pin 1 at a predetermined axial distance from the one deflection roller 16. The rope runs from the further deflection roller 17 to a fastening point 18 which, like the fastening point 15, lies on the outer part 2. The fastening point 18 is in the switched-off state of the disconnector near one deflection roller 16, but in the area between the two deflection rollers 16 and 17.

Auf dem Hilfsschaltstift 4 befinden sich zwei Federn 19 und 20, die jeweils zwischen dem scheibenförmigen Teil 10 des Steuerelementes 9 und den Ansätzen 6 bzw. 7 des Hilfsschaltstiftes 4 liegen.On the auxiliary switching pin 4 there are two springs 19 and 20, each lying between the disk-shaped part 10 of the control element 9 and the lugs 6 and 7 of the auxiliary switching pin 4.

An dem Schaltstift 1 ist eine Klinke 21 angelenkt, die mittels einer Druckfeder 22 in Richtung auf den Hilfsschaltstift 4 gedrückt wird. Eine weiter Klinke 23 ist an dem Außenteil 2 angelenkt und durch eine weitere Druckfeder 24 ebenfalls in Richtung auf den Hilfsschaltstift 4 gedrückt. Beide Klinken 21 und 23 sind so angeordnet, daß sie im Arbeitsbereich des Betätigungsteiles 11 des Steuerelementes 9 liegen.A pawl 21 is articulated on the switching pin 1 and is pressed in the direction of the auxiliary switching pin 4 by means of a compression spring 22. Another pawl 23 is articulated on the outer part 2 and is also pressed in the direction of the auxiliary switching pin 4 by a further compression spring 24. Both pawls 21 and 23 are arranged so that they are in the working area of the actuating part 11 of the control element 9.

Zur weiteren Erläuterung des erfindungsgemäßen Trennschalters wird auf die weiteren Darstellungen der Figur Bezug genommen, in denen der Trennschalter in seinen verschiedenen Zuständen dargestellt ist.To further explain the circuit breaker according to the invention, reference is made to the further representations of the figure, in which the circuit breaker is shown in its various states.

Die Darstellung 2 zeigt, daß aufgrund einer nicht dargestellten, äußeren Betätigung des Schaltstiftes 1 dieser um ein kleines Stück nach rechts in Richtung auf das feststehende Kontaktstück 3 bewegt worden ist, wobei das Steuerelement 9 von dem Seil 13 soweit nach rechts bewegt worden ist, daß aufgrund der dabei verursachten Spannung der Feder 19 der Ansatz 6 des Hilfsschaltstiftes 4 gegen einen Anschlag 25 der Klinke 21 gedrückt wird. Im Verlaufe der weiteren Betätigung des Schaltstiftes 1 wird die Feder 19 immer stärker gespannt, weil aufgrund des Seilantriebes das Steuerelement einen doppelt so weiten Weg wie der Schaltstift 1 zurücklegt. Das Steuerelement 9 gelangt schließlich in eine solche Stellung, wie sie die Darstellung 3 zeigt. In dieser Stellung wird durch einen Haken 26 des Betätigungsteiles 11 die Klinke 21 nach unten geschwenkt und dadurch der Ansatz 6 des Hilfsschaltstiftes 4 freigegeben. Der Hilfsschaltstift 4 schnellt daraufhin in eine Stellung vor, wie sie die Darstellung 4 zeigt. In dieser Darstellung ist eine galvanische Verbindung zwischen dem Hilfsschaltstift 4 und einem nicht dargestellten Hilfskontaktstück im feststehenden Kontaktstück 3 hergestellt. Schaltstift 1 bzw. Hilfsschaltstift 4 und das Kontaktstück haben nunmehr dasselbe Potential.The illustration 2 shows that due to an external actuation, not shown, of the switching pin 1, this has been moved a little to the right in the direction of the fixed contact piece 3, the control element 9 having been moved to the right by the cable 13 so that due to the tension of the spring 19 caused thereby, the shoulder 6 of the auxiliary switching pin 4 is pressed against a stop 25 of the pawl 21. In the course of further actuation of the switching pin 1, the spring 19 is tensioned more and more because, because of the cable drive, the control element travels twice as far as the switching pin 1. The control element 9 finally arrives in a position such as that shown in FIG. 3. In this position, the pawl 21 is pivoted downward by a hook 26 of the actuating part 11, thereby releasing the extension 6 of the auxiliary switching pin 4. The auxiliary switching pin 4 then moves to a position as shown in the illustration 4. In this illustration, a galvanic connection between the auxiliary switching pin 4 and an auxiliary contact piece, not shown, is established in the fixed contact piece 3. Switch pin 1 or auxiliary switch pin 4 and the contact piece now have the same potential.

Wird der Schaltstift 1 noch weiter in Richtung auf das feststehende Kontaktstück 3 bewegt, dann wird der Befestigungspunkt des scheibenförmigen Teils 10 des Steuerelementes 9 um die eine Umlenkrolle 16 geführt und nimmt schließlich eine Lage ein, wie sie die Darstellung 5 wiedergibt. Dadurch wird der Hilfsschaltstift noch weiter in das Hilfskontaktstück eingeschoben. Bei noch weiterem Vorschieben des Schaltstiftes 1 bewegt sich nunmehr das Steuerelement nicht mehr weiter vorwärts, sondern bleibt in der in der Darstellung 5 gezeigten Stellung ; der Schaltstift 1 hingegen gelangt in Eingriff mit dem feststehenden Kontaktstück 3, und die Einschaltbewegung ist beendet ; der Trennschalter ist geschlossen. Dies zeigt die Darstellung 6 der Figur.If the switching pin 1 is moved even further in the direction of the fixed contact piece 3, then the attachment point of the disk-shaped part 10 of the control element 9 is guided around the one deflection roller 16 and finally assumes a position as shown in FIG. 5. As a result, the auxiliary switching pin is pushed even further into the auxiliary contact piece. If the switching pin 1 is pushed even further forward, the control element no longer moves forward, but remains in the position shown in FIG. 5; the switching pin 1, however, comes into engagement with the fixed contact piece 3, and the switch-on movement is ended; the disconnector is closed. This is shown in illustration 6 of the figure.

Beim Ausschalten des Trennschalters wird der Schaltstift 1 in Richtung des Pfeiles 27 (vgl. Darstellung 7) bewegt, wobei das Steuerelement 9 aufgrund des Seilantriebes schließlich wieder in eine Stellung gelangt, wie sie die Darstellung 7 zeigt. In dieser Lage ist der Ansatz 7 am hinteren Ende 8 des Hilfsschaltstiftes 4 gegen einen Anschlag 28 der weiteren Klinke 23 geführt, und es beginnt nun bei der weiteren Rückwärtsbewegung des Schaltstiftes 1 und der damit einhergehenden Bewegung des Steuerelementes 9 ein Vorspannen der Feder 20. Erreicht das Steuerglied aufgrund der Bewegung des Schaltstiftes 1 die in der Darstellung 8 gezeigte Position, dann wird von einem Haken 29 des Betätigungsteiles 11 die weitere Klinke 23 nach unten geschwenkt und damit der Ansatz 7 des Hilfsschaltstiftes 4 freigegeben. Der Hilfsschaltstift 4 schnellt daher in Richtung des Pfeiles 30 zurück, wodurch die galvanische Verbindung zwischen seinem vorderen Ende und dem nicht dargestellten Hilfskontaktstück aufgetrennt wird. Dies ist in der Darstellung 9 wiedergegeben. Wird nun - wie es die Darstellung 10 zeigt - der Schaltstift 1 in seine Ausgangslage zurückgebracht, dann nimmt auch das Steuerelement 9 wieder seine ursprüngliche Lage ein ; auch der Hilfsschaltstift 4 befindet sich mit seinem vorderen Ende wieder innerhalb des Schaltstiftes 1.When the disconnector is switched off, the switching pin 1 is moved in the direction of the arrow 27 (see FIG. 7), the control element 9 finally coming into a position again due to the cable drive, as shown in FIG. 7. In this position, the shoulder 7 is guided at the rear end 8 of the auxiliary switching pin 4 against a stop 28 of the further pawl 23, and it now begins with the further backward movement of the switching pin 1 and the associated movement of the control element 9, a biasing of the spring 20. Achieved the control member due to the movement of the switching pin 1 the position shown in the illustration 8, then the further pawl 23 is pivoted downwards by a hook 29 of the actuating part 11 and thus the extension 7 of the auxiliary switching pin 4 is released. The auxiliary switching pin 4 therefore snaps back in the direction of arrow 30, as a result of which the galvanic connection between its front end and the auxiliary contact piece, not shown, is broken. This is shown in Figure 9. If - as shown in illustration 10 - the switching pin 1 is returned to its starting position, then the control element 9 also returns to its original position; the auxiliary switching pin 4 is also located with its front end inside the switching pin 1.

Es zeigt sich also. daß es bei dem erfindungsgemäßen Trennschalter mit verhältnismäßig geringem Aufwand gelingt, das Steuerelement doppelt so schnell wie den Schaltstift bis zu einer bestimmten Stellung anzutreiben, wodurch der Hilfsschaltstift unter die Vorspannung einer Feder gebracht wird und bei seiner Freigabe schlagartig eine Kontaktgabe herbeiführt, längst bevor der Schaltstift in Kontakt mit dem feststehenden Kontaktstück gelangt ist. Auf diese Weise ist beim Einschaltvorgang eine kurze Vorüberschlagszeit erreicht. Bei der Ausschaltbewegung ist bei dem erfindungsgemäßen Trennschalter die Bewegung des Steuerelementes gegenüber dem Schaltstift zunächst verzögert, und es wird danach eine weitere Feder vorgespannt, wodurch sich nach Auslösen dieser Feder eine Unterbrechung des Kontaktes zwischen Hilfsschaltstift und Hilfskontaktstück zu einem Zeitpunkt erreichen läßt, zu dem der Schaltstift sich weitestgehend von dem feststehenden Kontaktstück entfernt hat.So it shows. that it is in the fiction according to the isolating switch with relatively little effort, the control element can be driven twice as fast as the switching pin to a certain position, whereby the auxiliary switching pin is brought under the pretension of a spring and suddenly makes contact when released, long before the switching pin comes into contact with the stationary contact piece has reached. In this way, a short pre-rollover time is reached when switching on. In the disconnection movement, the movement of the control element with respect to the switching pin is initially delayed in the disconnector according to the invention, and then a further spring is preloaded, which after triggering this spring can cause an interruption in the contact between the auxiliary switching pin and the auxiliary contact piece at a time when the Switch pin has largely moved away from the fixed contact piece.

Claims (3)

1. An isolating switch comprising a stationary, tubular contact piece (3) and a movable, tubular switching pin (1), which is guided in a stationary outer part (2) and in its interior has an auxiliary switching pin (4) which can be put under spring loading and is movable relative to the switching pin (1) and can be connected to an auxiliary switching piece of the stationary contact piece (3), characterised in that at its front end which faces the contact piece (3), the switching pin (1) carries a latch (22) which interacts with an attachment (6) at the front end (5) of the auxiliary switching pin (4), that a further latch (23) is supported on the outer part (2), which latch interacts with an attachment (7) at the rear end (8) of the auxiliary switching pin (4) ; that in the switching pin (1) a control element (9) is arranged so as to be longitudinally movable and between which and the attachments (6, 7) of the auxiliary switching pin (4) a spring (19, 20) is in each case arranged ; and that the control element (9) is connected to the switching pin (1) through a translatory drive (13) and is guided to operate the latches (22, 23).
2. An isolating switch as claimed in Claim 1, characterised in that the translatory drive is a cable transmission and comprises two guide rollers (16, 17) which are positioned on the switching pin (1) at a predetermined axial distance from one another ; that a cable has its one end (14) fixed to a point (15) on the outer part (2) which lies in the region of the rear end of the auxiliary switching pin (4), and is guided around the guide roller (17) which is further away from this point (15) and subsequently guided around the other closer guide roller (17), and has its other end connected to a point (18) on the outer part (2) which in the open state of the longitudinal isolating switch is adjacent to the one guide roller (16) and lies between the guide rollers (16, 17); and that the control element (9) is connected to the section of the cable (13) which in the open state of the longitudinal isolating switch lies between the guide rollers (16, 17).
3. An isolating switch as claimed in Claim 1 or Claim 2, characterised in that the control element (9) consists of a disc-shaped member (10), which slides on the auxiliary switching pin (4), and an actuating member (11) for the latches (22, 23) which is arranged at right angles thereto.
EP82730078A 1981-07-10 1982-06-11 Isolating switch Expired EP0070248B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813127960 DE3127960A1 (en) 1981-07-10 1981-07-10 DISCONNECTOR
DE3127960 1981-07-10

Publications (3)

Publication Number Publication Date
EP0070248A2 EP0070248A2 (en) 1983-01-19
EP0070248A3 EP0070248A3 (en) 1984-04-25
EP0070248B1 true EP0070248B1 (en) 1986-04-16

Family

ID=6136979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730078A Expired EP0070248B1 (en) 1981-07-10 1982-06-11 Isolating switch

Country Status (4)

Country Link
US (1) US4539450A (en)
EP (1) EP0070248B1 (en)
CA (1) CA1227517A (en)
DE (2) DE3127960A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545263B1 (en) * 1983-04-29 1986-06-13 Alsthom Atlantique TELESCOPIC DISCONNECTOR
FR2547107B1 (en) * 1983-06-06 1986-05-09 Merlin Gerin SHIELDED ISOLATION DISCONNECTOR
DE3832171A1 (en) * 1988-07-01 1990-01-04 Licentia Gmbh DEVICE FOR RAPID SWITCHING ON AND OFF OF SMALL CURRENTS FOR DISCONNECTORS FROM V.I.S.
FR2665019B1 (en) * 1990-07-19 1992-09-18 Merlin Gerin HIGH VOLTAGE DISCONNECTOR.
US6251952B1 (en) 1991-01-24 2001-06-26 Belmar Corporation Method of using lachrymatory agents for moisturizing the eyes
FR2737601B1 (en) * 1995-08-01 1997-09-12 Berdanos Guy HIGH VOLTAGE ISOLATION DISCONNECTOR WITH HIGH CUTTING POWER
JP2008520911A (en) 2004-11-17 2008-06-19 リナック エー／エス Linear actuator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706782A (en) * 1924-03-17 1929-03-26 Gen Electric Electric switch
US3348001A (en) * 1965-07-26 1967-10-17 Westinghouse Electric Corp Electric distribution system
DE1540612B2 (en) * 1965-12-15 1971-10-21 Siemens AG, 1000 Berlin u. 8000 München DRIVE DEVICE FOR THE MOVABLE SWITCH PIN OF A HIGH VOLTAGE SWITCH
CH555589A (en) * 1973-07-12 1974-10-31 Sprecher & Schuh Ag HIGH VOLTAGE SWITCHES, IN PARTICULAR PRESSURE GAS SWITCHES.
US3943314A (en) * 1974-05-14 1976-03-09 Westinghouse Electric Corporation Motion-multiplying linkage-mechanism for sealed-casing structures

Also Published As

Publication number Publication date
EP0070248A3 (en) 1984-04-25
DE3127960A1 (en) 1983-01-27
EP0070248A2 (en) 1983-01-19
CA1227517A (en) 1987-09-29
US4539450A (en) 1985-09-03
DE3270584D1 (en) 1986-05-22

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