EP0101564B1 - Isolating switch with pantograph - Google Patents

Isolating switch with pantograph Download PDF

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Publication number
EP0101564B1
EP0101564B1 EP83107096A EP83107096A EP0101564B1 EP 0101564 B1 EP0101564 B1 EP 0101564B1 EP 83107096 A EP83107096 A EP 83107096A EP 83107096 A EP83107096 A EP 83107096A EP 0101564 B1 EP0101564 B1 EP 0101564B1
Authority
EP
European Patent Office
Prior art keywords
contact
pantograph
rocker
holding
spar
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
EP83107096A
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German (de)
French (fr)
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EP0101564A2 (en
EP0101564A3 (en
Inventor
Gerhard Körner
Horst Plettner
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.)
ABB AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
Asea Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, Asea Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT83107096T priority Critical patent/ATE38584T1/en
Publication of EP0101564A2 publication Critical patent/EP0101564A2/en
Publication of EP0101564A3 publication Critical patent/EP0101564A3/en
Application granted granted Critical
Publication of EP0101564B1 publication Critical patent/EP0101564B1/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

Definitions

  • the invention relates to a scissor disconnector with two scissor-like movable contact bars, which in the switched-on state take at least one elongated mating contact piece between them, contact strips extending parallel to the contact bars being attached to the contact bars with the interposition of retaining springs.
  • the counter contact and the contact bars are cylindrical. This results in a single contact between one contact bar and one counter contact, which also applies if two counter contacts are arranged one above the other. These single contacts or single current transitions lead to a high current density in the contact point and this results in high repulsive forces in this contact point due to the effect of the electric current.
  • the object of the invention is to develop a disconnector of the type mentioned in such a way that, in addition to reducing the current densities per contact point on the contact bar, the repulsive forces at the contact point are reduced.
  • the retaining springs are approximately C-shaped and the web of each C-shaped retaining spring is attached to the associated contact bar and a contact strip on the outer surface of each of the two legs of the retaining spring running parallel to the web.
  • a U-shaped power supply itself has also become known from DE-C-662 863. However, this is not a scissor-type disconnect switch, but a switch provided with a disconnect knife, and the U-shaped design of the mating contact has the task of compensating tolerances on the disconnect knife in addition to the so-called loop formation. This known configuration is also not comparable with the solution according to the invention.
  • At least one rocker is located inside each retaining spring, the surface of which facing the associated contact bar is convex, so that the rocker can rock on the inner surface of the web of the retaining spring.
  • the inner surface of the leg ends of the retaining spring then rests against the side facing away from the contact bar.
  • the rocker is completely insulated and coated on all sides with an outdoor-resistant plastic.
  • the plastic must be applied in such a way that it is not mechanically pushed through. For this purpose, a coating of several tenths of a millimeter thick must be applied.
  • This insulation has the advantage that compensating currents between the contact strips, which may be at different potential, can be avoided via the rocker; Such compensation currents would then have the consequence that there would be additional current transitions in the area of contact between the retaining springs and the rocker. Such additional current transitions are then avoided by the insulation.
  • Such misalignments can often occur, for example, when there are relatively large installation tolerances or when the mating contact is crooked due to wind or a short circuit.
  • a scissor disconnector which has two contact strips per contact spar, which are carried by retaining springs which have a shape due to which the contact force is increased in the event of a short circuit.
  • a scissor separator in a conventional design is supported on an insulating column 10, on the other Top of a gear box 12 for the two scissor members 14 and 16 is arranged.
  • the two scissor members 14 and 16 each have a lower rod 20 which can be driven via an axis 18 and which is connected to an upper rod 24 by means of a joint 22; the upper rod 24 is articulated to the upper rod 26 of the other scissor arm 16 by means of an axis 28.
  • the actual contact bars 30 and 32 are molded, which take two mating contacts 34 and 36 between them.
  • the two contact bars 30 and 32 are box-shaped and face each other in such a way that a flat side of each contact bar faces the counter-contact piece 36.
  • a plurality of C-shaped retaining springs 38 and 40 are fastened on the outer surface of the flat sides by means of a screw connection 42.
  • the retaining springs 38 and 40 and the contact arrangement in the area of the contact bars are mirror-symmetrical, so that it is sufficient if the contact arrangement on the left contact bar 30 is described.
  • the C-shaped retaining spring 40 has a web 44, the outer surface of which is fastened to the outer flat side of the contact bar 30 by means of the screws 42.
  • the web 44 is adjoined on both sides by arcuate sections 46 and 48 which intersect the web plane in such a way that the center points M of the two arcuate sections lie in the plane of the web 44.
  • Legs 50 and 52 adjoin the two arcuate sections 46 and 48, which in the process run parallel to the web 44 and end at a distance A from one another.
  • the distance between the legs 50 and 52 from the plane in which the web 44 is located is equal to the radius of the arcuate sections 46 and 48.
  • contact strips 54 and 56 are fastened by means of screws 59.
  • the contact strips 54 and 56 overlap the entire contact area of the contact bars 30 and 32 in such a way that both contact strips bear against the mating contact pieces 34 and 36.
  • the contact strips 54 and 56 are approximately rectangular and made of copper, the actual contacting surfaces of the two contact strips 54 and 56 being formed by inserts 58 and 60 made of erosion-resistant material, which are inserted into recesses 62 and 64 of the contact strips.
  • the screws 59 provided for holding the contact strips 54, 56 on the contact springs 40 are accessible through corresponding recesses in the area of the web 44.
  • a rocker 70 is located inside each retaining spring.
  • the rocker surface 72 facing the contact bar 30 is convex; in the illustrated embodiment it can be seen that the rocker surface 72 is formed by two inclined surfaces 74 and 76 which have an arcuate transition in the area in which they merge. The angle between the two inclined surfaces 74 and 76 is obtuse and open towards the counter-contact piece 36.
  • the rocker surface opposite the convex rocker surface 72 has two knob-like projections 78 and 80, which abut the inner surfaces of the ends of the legs 50 and 52, respectively, or the leg ends 50 and 52 press against the knobs 78 and 80 due to their spring force.
  • the rocker also has a through-opening 82 into which the head 84 of the screw 42 engages, as a result of which the rocker 70 is guided in the interior of the C-shaped retaining spring 40 in an essentially non-displaceable manner.
  • the seesaw is encased in an insulating sleeve. This sheathing prevents equalizing currents between the contact strips 54 and 56 through the rocker 70 in the event that the contact strips are at different potentials for some reason.
  • the strips 54 and 56 are connected continuously and several C-shaped springs, preferably six springs in a particular exemplary embodiment, are connected in parallel or next to one another with the contact strips.
  • the rockers 70 insulated from the contact strips 54, 56 and the retaining springs 40 are also continuous.
  • the distance A of the contact strips 54 and 56 and the mutually facing end of the legs 50 and 52 is selected so that the screws 42 are accessible from the right or from the left for screwing onto the contact bar.
  • the screws are expediently designed as so-called Allen screws.
  • the contact strips 54 and 56 can be moved relative to one another by means of the rocker, so that an inclined position of the mating contacts 34 and 36 is compensated for.
  • the current flows from the contact bars 30 and 32 to the web 44 of the retaining springs 40 and divides there into a current path through the arc 46 and the leg 50 to the contact strip 54 on the one hand and a current path through the arc 48 and the snail 52 to the contact strip 56 on the other hand.
  • the current therefore flows in the holding springs 40 in a loop, which leads to a spreading of the holding springs due to the magnetic fields generated by the electrical current.
  • the contact forces between the contact strips 54 and 56 and the mating contact 36 are thus greatly increased, particularly in the event of a short circuit.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Push-Button Switches (AREA)
  • Slide Switches (AREA)

Abstract

1. Pantograph-type isolator having two contact spars (30, 32), which can be moved towards one another in the form of a pantograph and which take at least one elongated counter contact member (36) between them in the closed condition, contact strips (54, 56) extending parallel to the contact spars being attached to the contact spars with interposition of holding springs (38, 40), characterized in that the holding springs (38, 40) are constructed to be approximately C-shaped and the web (44) of each C-shaped holding spring is mounted on the associated contact spar (30, 32) and one contact strip (54, 56) each is mounted on the outside face of each of the two legs (50, 52) of the holding spring extending parallel to the web.

Description

Die Erfindung betrifft einen Scherentrennschalter mit zwei scherenförmig gegeneinander bewegbaren Kontaktholmen, die im eingeschalteten Zustand wenigstens ein langgestrecktes Gegenkontaktstück zwischen sich nehmen, wobei an den Kontaktholmen unter Zwischenfügung von Haltefedern parallel zu den Kontaktholmen verlaufende Kontaktleisten angebracht sind.The invention relates to a scissor disconnector with two scissor-like movable contact bars, which in the switched-on state take at least one elongated mating contact piece between them, contact strips extending parallel to the contact bars being attached to the contact bars with the interposition of retaining springs.

Bei bekannten Scherentrennschaltern sind der Gegenkontakt und die Kontaktholme zylindrisch ausgebildet. Dadurch erhält man jeweils einen Einfachkontakt zwischen je einem Kontaktholm und je einem Gegenkontakt, was auch dann gilt, wenn zwei Gegenkontakte übereinander angeordnet sind. Diese Einfachkontakte bzw. Einfachstromübergänge führen zu einer hohen Stromdichte im Kontaktpunkt und hieraus resultieren hohe abstoßende Kräfte in diesem Kontaktpunkt aufgrund der.Wirkung des elektrischen Stromes.In known scissor disconnectors, the counter contact and the contact bars are cylindrical. This results in a single contact between one contact bar and one counter contact, which also applies if two counter contacts are arranged one above the other. These single contacts or single current transitions lead to a high current density in the contact point and this results in high repulsive forces in this contact point due to the effect of the electric current.

Aus der DE-B-1074 116 ist ein Scherentrennschalter der eingangs genannten Art bekannt geworden. An den Kontaktholmen sind Blattfedern angeordnet, die in Richtung der Kontaktholme ausgerichtet sind und die als federnde Kontaktstückhalter dienen, die lediglich die Aufgabe haben, Toleranzen zwsichen den Kontaktholmen und dem Gegenkontakt auszugleichen. Im Gegensatz zu früher bekannten Scherentrennschaltern befinden sich an jedem Kontaktholm drei Kontaktleisten, wodurch eine Erhöhung der Kontaktpunkte pro Kontaktholm erreicht wird.From DE-B-1074 116 a scissor disconnector of the type mentioned has become known. On the contact bars, leaf springs are arranged, which are aligned in the direction of the contact bars and which serve as resilient contact piece holders, which only have the task of compensating for tolerances between the contact bars and the mating contact. In contrast to previously known scissor-type circuit breakers, there are three contact strips on each contact bar, which increases the contact points per contact bar.

Aufgabe der Erfindung ist es, einen Trennschalter der eingangs genannten Art so weiterzubilden, daß zusätzlich zu der Verringerung der Stromdichten pro Kontaktstelle am Kontaktholm die abstoßenden Kräfte im Kontaktpunkt reduziert werden.The object of the invention is to develop a disconnector of the type mentioned in such a way that, in addition to reducing the current densities per contact point on the contact bar, the repulsive forces at the contact point are reduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Haltefedern in etwa C-förmig ausgebildet sind und der Steg jeder C-förmigen Haltefeder an dem zugehörigen Kontaktholm und je eine Kontaktleiste an der Außenfläche jeder der beiden parallel zu dem Steg verlaufenden Schenkel der Haltefeder befestigt ist.This object is achieved in that the retaining springs are approximately C-shaped and the web of each C-shaped retaining spring is attached to the associated contact bar and a contact strip on the outer surface of each of the two legs of the retaining spring running parallel to the web.

Bedingt durch die C-Form der Haltefedern werden zwei parallele Strompfade gebildet, die ein Aufspreizen der Federn bewirken und insbesondere im Kurzschlußfall die Kontaktkraft erhöhen. Dadurch wird erreicht, daß die abstoßenden Kräfte im Kontaktpunkt durch die elektrischen Wirkungen des Stromes reduziert werden.Due to the C-shape of the retaining springs, two parallel current paths are formed, which spread the springs and increase the contact force, particularly in the event of a short circuit. It is thereby achieved that the repulsive forces in the contact point are reduced by the electrical effects of the current.

Aus der DE-B-1265 823 ist eine Kontaktanordnung insbesondere für Selbstschalter bekannt geworden, bei der eine ovale bzw. jeweils U-förmige Stromzuführung zu einem Kontaktstück vorgesehen ist. Diese Stromzuführung wird aber durch sehr elastische Litzen gebildet, die für das Kontaktstück selbst keine Haltefunktion haben. Vielmehr wird das bewegliche Kontaktstück mittels einer eigenen Druckfeder und einer geeigneten Gelenkführung festgehalten. Mit der Erfindung ist diese Lösung nicht vergleichbar.From DE-B-1265 823 a contact arrangement has become known, in particular for automatic switches, in which an oval or U-shaped current supply to a contact piece is provided. This power supply is formed by very elastic strands that have no holding function for the contact piece itself. Rather, the movable contact piece is held in place by its own compression spring and a suitable joint guide. This solution cannot be compared with the invention.

Eine U-förmige Stromzuführung an sich ist auch aus der DE-C-662 863 bekannt geworden. Es handelt sich hierbei aber nicht um einen Scherentrennschalter, sondern um einen mit einem Trennmesser versehenen Schalter, und die U-förmige Ausführung des Gegenkontaktes hat neben der sog. Schleifenbildung auch die Aufgabe, Toleranzen am Trennmesser auszugleichen. Mit der erfindungsgemäßen Lösung ist diese bekannte Ausgestaltung ebenfalls nicht vergleichbar.A U-shaped power supply itself has also become known from DE-C-662 863. However, this is not a scissor-type disconnect switch, but a switch provided with a disconnect knife, and the U-shaped design of the mating contact has the task of compensating tolerances on the disconnect knife in addition to the so-called loop formation. This known configuration is also not comparable with the solution according to the invention.

In einer bevorzugten Ausführungsform befindet sich im Inneren jeder Haltefeder wenigstens eine Wippe, deren dem zugehörigen Kontaktholm zugewandte Fläche konvex ausgebildet ist, so daß die Wippe auf der Innenfläche des Steges der Haltefeder wippen kann. Gegen die dem Kontaktholm abgewandte Seite liegt dann die Innenfläche der Schenkelenden der Haltefeder federnd an.In a preferred embodiment, at least one rocker is located inside each retaining spring, the surface of which facing the associated contact bar is convex, so that the rocker can rock on the inner surface of the web of the retaining spring. The inner surface of the leg ends of the retaining spring then rests against the side facing away from the contact bar.

Die Wippe ist vollständig isoliert und zwar allseitig mit einem freiluftbeständigen Kunststoff beschichtet. Der Kunststoff ist so aufzubringen, daß er mechanisch nicht durchgedrückt wird. Zu diesem Zwecke ist eine Beschichtung von mehreren Zehntel mm Dicke aufzubringen. Diese Isolierung hat den Vorteil, daß Ausgleichsströme zwischen den evtl. auf unterschiedlichem Potential befindlichen Kontaktleisten über die Wippe vermieden werden können; derartige Ausgleichsströme hätten dann nämlich zur Folge, daß im Bereich der Kontaktierung zwischen den Haltefedem und der Wippe zusätzliche Stromübergänge vorhanden wären. Derartige zusätzliche Stromübergänge werden dann durch die Isolierung vermieden.The rocker is completely insulated and coated on all sides with an outdoor-resistant plastic. The plastic must be applied in such a way that it is not mechanically pushed through. For this purpose, a coating of several tenths of a millimeter thick must be applied. This insulation has the advantage that compensating currents between the contact strips, which may be at different potential, can be avoided via the rocker; Such compensation currents would then have the consequence that there would be additional current transitions in the area of contact between the retaining springs and the rocker. Such additional current transitions are then avoided by the insulation.

Mit der Ausgestaltung ist es möglich, die Kontaktleisten an dem Kontaktholm anzubringen, wobei aufgrund der Wippe und der Haltefeder bzw. der Haltefedern ein Schiefstellen des Gegenkontaktes immer ausgeglichen wird, so daß die Gefahr vermieden ist, daß lediglich eine Kontaktleiste für den Stromübergang von Kontaktholm zum Gegenkontakt herangezogen wird.With the design, it is possible to attach the contact strips to the contact spar, whereby due to the rocker and the retaining spring or the retaining springs, a misalignment of the mating contact is always compensated for, so that the risk is avoided that only one contact strip for the current transfer from the contact spar to Counter contact is used.

Derartige Schiefstellungen können häufig auftreten, beispielsweise dann, wenn relativ große Montagetoleranzen vorhanden sind oder wenn sich der Gegenkontakt bei Windeinfluß oder bei einem Kurzschluß schiefstellt.Such misalignments can often occur, for example, when there are relatively large installation tolerances or when the mating contact is crooked due to wind or a short circuit.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind den weiteren Unteransprüchen zu entnehmen.Further advantageous embodiments of the invention can be found in the further subclaims.

Mit der erfindungsgemäßen Anordnung ist ein Scherentrennschalter geschaffen, der zwei Kontaktleisten pro Kontaktholm aufweist, die von Haltefedern getragen werden, die eine Gestalt aufweisen, aufgrund derer die Kontaktkraft im Kurzschlußfall vergrößert ist.With the arrangement according to the invention, a scissor disconnector is created which has two contact strips per contact spar, which are carried by retaining springs which have a shape due to which the contact force is increased in the event of a short circuit.

Anhand der Zeichnung wird ein Ausführungsbeispiel der Erfindung beschrieben.An embodiment of the invention will be described with reference to the drawing.

Es zeigen.

  • Figur 1 eine teilweise Seitenansicht auf einen Scherentrennschalter, und
  • Figur 2 eine Schnittansicht gemäß der Linie A-A der Figur 1.
Show it.
  • Figure 1 is a partial side view of a scissor disconnector, and
  • FIG. 2 shows a sectional view along the line AA in FIG. 1.

Ein Scherentrenner in herkömmlicher Bauart ist auf einer Isoliersäule 10 aufgestützt, an deren Oberseite ein Getriebekasten 12 für die beiden Scherenglieder 14 bzw. 16 angeordnet ist. Die beiden Scherenglieder 14 und 16 besitzen je eine über eine Achse 18 antreibbare Unterstange 20, die mittels eines Gelenkes 22 mit einer Oberstange 24 verbunden ist; die Oberstange 24 ist mit der Oberstange 26 des anderen Scherenarmes 16 mittels einer Achse 28 gelenkig verbunden. Oberhalb dieser Achse 28 sind die eigentlichen Kontaktholme 30 und 32 angeformt, die zwei Gegenkontakte 34 und 36 zwischen sich nehmen.A scissor separator in a conventional design is supported on an insulating column 10, on the other Top of a gear box 12 for the two scissor members 14 and 16 is arranged. The two scissor members 14 and 16 each have a lower rod 20 which can be driven via an axis 18 and which is connected to an upper rod 24 by means of a joint 22; the upper rod 24 is articulated to the upper rod 26 of the other scissor arm 16 by means of an axis 28. Above this axis 28, the actual contact bars 30 and 32 are molded, which take two mating contacts 34 and 36 between them.

In der Figur 2 ist lediglich das Gegenkontaktstück 36 zu sehen. Die beiden Kontaktholme 30 und 32 sind kastenförmig ausgebildet und so einander zugewandt, daß eine Flachseite jedes Kontaktholmes dem Gegenkontaktstück 36 zugewandt ist. Auf der Außenfläche der Flachseiten sind mehrere C-förmige Haltefedern 38 bzw. 40 mittels einer Schraubverbindung 42 befestigt. Die Haltefedern 38 und 40 und die Kontaktanordnung im Bereich der Kontaktholme sind spiegelsymetrisch, so daß es ausreicht, wenn die Kontaktanordnng am linken Kontaktholm 30 beschrieben wird.Only the mating contact piece 36 can be seen in FIG. The two contact bars 30 and 32 are box-shaped and face each other in such a way that a flat side of each contact bar faces the counter-contact piece 36. A plurality of C-shaped retaining springs 38 and 40 are fastened on the outer surface of the flat sides by means of a screw connection 42. The retaining springs 38 and 40 and the contact arrangement in the area of the contact bars are mirror-symmetrical, so that it is sufficient if the contact arrangement on the left contact bar 30 is described.

Die C-förmige Haltefeder 40 besitzt einen Steg 44, dessen Außenfläche an der äußeren Flachseite des Kontaktholmes 30 mittels der Schrauben 42 befestigt ist. An den Steg 44 schließen sich beidseitig kreibogenförmige Abschnitte 46 und 48 an, die die Stegbene dergestalt schneiden, daß die Mittelpunkte M der beiden kreisbogenförmigen Abschnitte in der Ebene des Steges 44 liegen.The C-shaped retaining spring 40 has a web 44, the outer surface of which is fastened to the outer flat side of the contact bar 30 by means of the screws 42. The web 44 is adjoined on both sides by arcuate sections 46 and 48 which intersect the web plane in such a way that the center points M of the two arcuate sections lie in the plane of the web 44.

An die beiden kreisbogenförmigen Abschnitte 46 und 48 schließen sich Schenkel 50 und 52 an, die dabei parallel zu dem Steg 44 aufeinander zu verlaufen und im Abstand A voneinander enden. Der Abstand der Schenkel 50 und 52 von der Ebene in der sich der Steg 44 befindet, ist gleich dem Radius der kreisbogenförmigen Abschnitte 46 bzw. 48.Legs 50 and 52 adjoin the two arcuate sections 46 and 48, which in the process run parallel to the web 44 and end at a distance A from one another. The distance between the legs 50 and 52 from the plane in which the web 44 is located is equal to the radius of the arcuate sections 46 and 48.

Auf der Außenfläche der Schenkel 50 bzw. 52 sind, parallel zu dem Kontaktholm 30 verlaufende Kontaktleisten 54 und 56 mittels Schrauben 59 befestigt. Die Kontaktleisten 54 und 56 übergreifen den gesamten Kontaktierungsbereich der Kontaktholme 30 und 32 dergestalt, daß beide Kontaktleisten gegen die Gegenkontaktstücke 34 und 36 anliegen. Die Kontaktleisten 54 und 56 sind annähernd rechteckig und aus Kupfer gebildet, wobei die eigentlichen Kontaktierungsflächen der beiden Kontaktleisten 54 und 56 durch Einlagen 58 bzw. 60 aus abbrandfestem Material gebildet sind, welche in Ausnehmungen 62 bzw. 64 der Kontaktleisten eingelegt sind.On the outer surface of the legs 50 and 52, parallel to the contact bar 30, contact strips 54 and 56 are fastened by means of screws 59. The contact strips 54 and 56 overlap the entire contact area of the contact bars 30 and 32 in such a way that both contact strips bear against the mating contact pieces 34 and 36. The contact strips 54 and 56 are approximately rectangular and made of copper, the actual contacting surfaces of the two contact strips 54 and 56 being formed by inserts 58 and 60 made of erosion-resistant material, which are inserted into recesses 62 and 64 of the contact strips.

Die zur Halterung der Kontaktleisten 54, 56 an den Kontaktfedern 40 vorgesehenen Schrauben 59 sind durch entsprechende Ausnehmungen im Bereich des Steges 44 zugänglich.The screws 59 provided for holding the contact strips 54, 56 on the contact springs 40 are accessible through corresponding recesses in the area of the web 44.

Im Inneren jeder Haltefeder befindet sich eine Wippe 70. Die dem Kontaktholm 30 zugewandte Wippenfläche 72 ist konvex ausgebildet; in der dargestellten Ausführungsform ist ersichtlich, daß die Wippenfläche 72 durch zwei Schrägflächen 74 und 76 gebildet ist, die in dem Bereich, in dem sie ineinander übergehen, einen kreisbogenartigen Übergang aufweisen. Der Winkel zwischen den beiden Schrägflächen 74 und 76 ist stumpf und zum Gegenkontaktstück 36 hin offen.A rocker 70 is located inside each retaining spring. The rocker surface 72 facing the contact bar 30 is convex; in the illustrated embodiment it can be seen that the rocker surface 72 is formed by two inclined surfaces 74 and 76 which have an arcuate transition in the area in which they merge. The angle between the two inclined surfaces 74 and 76 is obtuse and open towards the counter-contact piece 36.

Die der konvexen Wippenfläche 72 gegenüberliegende Wippenfläche besitzt zwei noppenartige Vorsprünge 78 bzw. 80, die an den Innenflächen der Enden der Schenkel 50 bzw. 52 anliegen bzw. die Schenkelenden 50 und 52 drücken sich aufgrund ihrer Federkraft gegen die Noppen 78 und 80 an. Die Wippe besitzt ferner eine Durchgangsöffnung 82, in die der Kopf 84 der Schraube 42 eingreift, wodurch die Wippe 70 im Inneren der C-förmigen Haltefeder 40 im wesentlichen unver- schiebbax.geführt ist.The rocker surface opposite the convex rocker surface 72 has two knob-like projections 78 and 80, which abut the inner surfaces of the ends of the legs 50 and 52, respectively, or the leg ends 50 and 52 press against the knobs 78 and 80 due to their spring force. The rocker also has a through-opening 82 into which the head 84 of the screw 42 engages, as a result of which the rocker 70 is guided in the interior of the C-shaped retaining spring 40 in an essentially non-displaceable manner.

Die Wippe ist mit einer Isolierschiecht umhüllt. Diese Umhüllung verhindert Ausgleichsströme zwischen den Kontaktleisten 54 und 56 durch die Wippe 70 hindurch, für den Fall, daß die Kontaktleisten aus irgendwelchen Gründen sich auf unterschiedlichen Potentialen befinden.The seesaw is encased in an insulating sleeve. This sheathing prevents equalizing currents between the contact strips 54 and 56 through the rocker 70 in the event that the contact strips are at different potentials for some reason.

Zur besseren Fertiung sind die Leisten 54 und 56 durchgehend und mehrere C-förmige Federn, bei einem besonderen Ausführungsbeispiel vorzugsweise sechs Federn, parallel bzw. nebeneinander mit den Kontaktleisten verbunden. Die gegenüber den Kontaktleisten 54, 56 bzw. den Haltefedern 40 isolierten Wippen 70 sind ebenfalls durchgehend. Der Abstand A der Kontaktleisten 54 und 56 und der aufeinander zuweisenden Ende der Schenkel 50 und 52 ist so ausgewählt, daß die Schrauben 42 von rechts bzw. von links her zum Festschrauben am Kontaktholm zugänglich sind. Zweckmäßigerweise sind die Schrauben als sog. Innensechskantschrauben ausgebildet.For better production, the strips 54 and 56 are connected continuously and several C-shaped springs, preferably six springs in a particular exemplary embodiment, are connected in parallel or next to one another with the contact strips. The rockers 70 insulated from the contact strips 54, 56 and the retaining springs 40 are also continuous. The distance A of the contact strips 54 and 56 and the mutually facing end of the legs 50 and 52 is selected so that the screws 42 are accessible from the right or from the left for screwing onto the contact bar. The screws are expediently designed as so-called Allen screws.

Aufgrund der beschriebenen Ausgestaltung können sich die Kontaktleisten 54 und 56 mittels der Wippe gegeneinander verschieben, so daß eine Schrägstellung der Gegenkontakte 34 und 36 ausgeglichen wird.Because of the configuration described, the contact strips 54 and 56 can be moved relative to one another by means of the rocker, so that an inclined position of the mating contacts 34 and 36 is compensated for.

Von den Kontaktholmen 30 bzw. 32 fließt der Strom zum Steg 44 der Haltefedern 40 und teilt sich dort auf in einen Strompfad durch den Bogen 46 und den Schenkel 50 zur Kontaktleiste 54 einerseits und einen Strompfad durch den Bogen 48 und den Schnekel 52 zur Kontaktleiste 56 andererseits auf. In den Haltefedern 40 fließt der Strom daher schleifenförmig, was zu einer Aufspreizung der Haltefedern aufgrund des vom elektrischen Strom erzeugten Magnetfelder führt. Damit werden die Kontaktkräfte zwischen den Kontaktleisten 54 und 56 und dem Gegenkontakt 36 insbesondere in einem Kurzschlußfall stark vergrößert.The current flows from the contact bars 30 and 32 to the web 44 of the retaining springs 40 and divides there into a current path through the arc 46 and the leg 50 to the contact strip 54 on the one hand and a current path through the arc 48 and the snail 52 to the contact strip 56 on the other hand. The current therefore flows in the holding springs 40 in a loop, which leads to a spreading of the holding springs due to the magnetic fields generated by the electrical current. The contact forces between the contact strips 54 and 56 and the mating contact 36 are thus greatly increased, particularly in the event of a short circuit.

Claims (5)

1. Pantograph-type isolator having two contact spars (30, 32), which can be moved towards one another in the form of a pantograph and which take at least one elongated counter contact member (36) between them in the closed condition, contact strips (54, 56) extending parallel to the contact spars being attached to the contact spars with interposition of holding springs (38, 40), characterized in that the holding springs (38, 40) are constructed to be approximately C-shaped and the web (44) of each C-shaped holding spring is mounted on the associated contact spar (30, 32) and one contact strip (54, 56) each is mounted on the outside face of each of the two legs (50, 52) of the holding spring extending parallel to the web.
2. Pantograph-type isolator according to Claim 1, characterized in that in the interior of each holding spring (38, 40) at least one rocker (70) is provided, the face (72) of which facing the associated contact spar (30, 32) is of convex construction so that the rocker can rock on the inside face of the web (44) of the holding spring (38, 40), and that the inside face of the leg ends (50, 52) of the holding spring elastically rest against its side facing away from the contact spar.
3. Pantograph isolator according to Claim 2, characterized in that at the side of the rocker (70) facing away from the contact spar (30, 32), knob-like projections (82) are formed integrally which are in each case in contact with the inside face of the leg ends (50, 52) of the associated holding spring (38, 40).
4. Pantograph-type isolator according to one of Claims 2 or 3, characterized in that the rocker (70) exhibits at least one passage opening (82) which is engaged by the head of the mounting screw (42) of the holding springs (38, 40) at the contact spar (30, 32).
5. Pantograph-type isolator according to one of Claims 2 to 4, characterized in that the rocker (70) is arranged in a continuously insulated manner in the holding springs (38, 40). -
EP83107096A 1982-08-21 1983-07-20 Isolating switch with pantograph Expired EP0101564B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83107096T ATE38584T1 (en) 1982-08-21 1983-07-20 SCISSOR DISCONNECT SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3231170 1982-08-21
DE19823231170 DE3231170A1 (en) 1982-08-21 1982-08-21 SCISSOR DISCONNECTOR

Publications (3)

Publication Number Publication Date
EP0101564A2 EP0101564A2 (en) 1984-02-29
EP0101564A3 EP0101564A3 (en) 1986-10-29
EP0101564B1 true EP0101564B1 (en) 1988-11-09

Family

ID=6171422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107096A Expired EP0101564B1 (en) 1982-08-21 1983-07-20 Isolating switch with pantograph

Country Status (4)

Country Link
EP (1) EP0101564B1 (en)
AT (1) ATE38584T1 (en)
DE (2) DE3231170A1 (en)
ES (1) ES282173Y (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016214377B4 (en) * 2016-08-03 2018-10-25 Siemens Aktiengesellschaft Contact arm arrangement for a high-voltage switching device and its use

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733322A (en) * 1956-01-31 curtis
DE662863C (en) * 1933-05-19 1938-07-23 Hochspannungs App G M B H Isolating switch contact
DE1074116B (en) * 1956-01-31 1960-01-28 Siemens Schuckertwerke Aktitr gesellschaft Berlin und Erlangen Emstutzer scissor disconnector
US2894101A (en) * 1958-01-20 1959-07-07 S & C Electric Co Switch contact construction
FR1290965A (en) * 1961-03-08 1962-04-20 Comp Generale Electricite Pantograph electrical disconnector
DE1490559A1 (en) * 1964-04-23 1969-07-10 Siemens Ag Single column disconnector
DE1265823B (en) * 1964-05-29 1968-04-11 Licentia Gmbh Contact arrangement for switching devices, especially automatic switches
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
CH627025A5 (en) * 1978-04-14 1981-12-15 Sprecher & Schuh Ag Contact arrangement for a pantograph disconnecter switch
DE2839914A1 (en) * 1978-09-14 1980-03-27 Bbc Brown Boveri & Cie DISCONNECTOR WITH A MAIN AND Tear-off contact
DE3048795A1 (en) * 1980-12-23 1982-07-15 Brown, Boveri & Cie Ag, 6800 Mannheim Contact for scissors-type disconnector - has two symmetric rectangular rails pivoted together on single column
DE3103356A1 (en) * 1981-01-31 1982-08-19 Ruhrtal Elektrizitätsgesellschaft Hartig GmbH & Co, 4300 Essen Interrupter switch having an arc auxiliary contact

Also Published As

Publication number Publication date
EP0101564A2 (en) 1984-02-29
EP0101564A3 (en) 1986-10-29
ES282173Y (en) 1985-12-16
DE3231170A1 (en) 1984-02-23
DE3378441D1 (en) 1988-12-15
ATE38584T1 (en) 1988-11-15
ES282173U (en) 1985-05-01

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