EP0072972B1 - Automatic switch - Google Patents

Automatic switch Download PDF

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Publication number
EP0072972B1
EP0072972B1 EP19820107287 EP82107287A EP0072972B1 EP 0072972 B1 EP0072972 B1 EP 0072972B1 EP 19820107287 EP19820107287 EP 19820107287 EP 82107287 A EP82107287 A EP 82107287A EP 0072972 B1 EP0072972 B1 EP 0072972B1
Authority
EP
European Patent Office
Prior art keywords
sliding
switch according
automatic switch
sliding member
contact carrier
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
EP19820107287
Other languages
German (de)
French (fr)
Other versions
EP0072972A3 (en
EP0072972A2 (en
Inventor
Uwe Dr. Dipl.-Ing. Drücker
Eduard Petrus
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
Publication of EP0072972A2 publication Critical patent/EP0072972A2/en
Publication of EP0072972A3 publication Critical patent/EP0072972A3/en
Application granted granted Critical
Publication of EP0072972B1 publication Critical patent/EP0072972B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/105—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement whereby the blow-off movement unlatches the contact from a contact holder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism

Definitions

  • the invention relates to a circuit breaker according to the first part of claim 1.
  • Such a self-switch is e.g. known from DE-C-11 67 957.
  • the movable contact carrier which carries the movable contact piece, is firmly connected to a U-shaped pawl, which is supported on a half shaft.
  • the half shaft is attached to the end of a multi-part lock lever of a key switch and transmits the force of a contact pressure spring to the movable contact carrier.
  • the pawl with the half shaft thus forms a spring-loaded latching mechanism for the movable contact carrier.
  • the half-wave slips into the U-shaped pawl, which releases the latching mechanism and the movable contact carrier very quickly, d. H. current limiting, is thrown into its open position. In this position, however, the switch is not yet ready to be switched on again, since the switch lock is still latched.
  • the key switch is only activated by the normal triggers that do not limit the current. Only when the switch lock is also released does the movable contact carrier make a further movement into the open position. The switch is then ready to be switched on again.
  • the known design has a rather complicated lever mechanism with a malfunction-prone half-wave, which is subject to relatively high wear.
  • Another disadvantage is that the movable contact carrier requires two opening movements in order to reach the final opening position.
  • the invention has for its object to provide an insensitive latching mechanism with high mechanical wear resistance and with as few individual components as possible for a circuit breaker of the type mentioned.
  • This object is achieved by the characterizing features of claim 1.
  • the slide piece rests under spring pressure on the projection provided in the area of the sliding surface near the switch lock.
  • the movable contact carrier is thus latched, the required contact pressure being generated simultaneously by the spring-mounted slider.
  • the latching point formed from the projection on the sliding surface and from the slider is released.
  • the release of the latching takes place in that the projection pushes the slider back against the spring force in the direction of the pivot point of the tensioning lever and thus the part surface of the sliding surface extending in the direction of the contacts can slide on the slider until the movable contact carrier has its z. B. has reached a limited end position by a stop. Since the key switch has not yet been released during this process, the lock lever and the tensioning lever with the slider remain in their original position, so that the slider is now at the end of the sliding surface in the area close to the contact. If the switch lock is released, e.g. B.
  • the slider moves from the contact-near area of the sliding surface back into the switch-near area of the sliding surface, so that the switching device is ready to be switched on again, the slider again in front of the projection in the switching lock Area.
  • the design according to the invention requires very few individual components.
  • the latching point formed by the sliding piece and the projection on the sliding surface is less susceptible to malfunction, independent of position and insensitive to vibrations and other influences. This latching point has an extremely high wear resistance.
  • Another advantage is that the movable contact carrier has already reached its full opening angle after the individual latch has been released. This opening angle corresponds approximately to the actuation angle of the switching shaft of the key switch. Since the full opening of the contact system already takes place when the movable contact carrier is spun on, there is a better arc quenching.
  • FIG. 1 shows sectional images
  • Fig. 3 shows a side view.
  • the contact system according to FIGS. 1 to 3 has a fixed contact piece 10 and a movable contact piece 11 which is fastened to a movable contact piece carrier 12.
  • a stop attached to the movable contact piece 11 for the action of an armature (not shown) of a quick-action release is shown.
  • 14 denotes a current supply to the movable contact piece 11.
  • the contact piece carrier 12 is rotatably mounted in a fixed pivot point 15. 16 with a fixed stop for an edge 17 of the contact piece carrier 12 is designated.
  • a tensioning lever 18 is also rotatably mounted, which is connected in an articulated manner via a slide roller 19 to a lock lever 20 of a switching lock 21.
  • the switching shaft of the switching lock 21, not shown in its details, is designated by 22. With 23 the maximum opening angle of the control shaft 22 is designated.
  • the contact piece carrier 12 has at its upper end a kidney-shaped recess 24 which forms a sliding surface 25 for the sliding roller 19 at the edge remote from the fulcrum 15.
  • the sliding surface 25 has a partial surface 26 with a constant distance 27 from the fulcrum 15 in the area close to the contact and a second partial surface 28 with a constant distance 29 from the fulcrum 15 in the area close to the switch lock.
  • the transition from the partial surface 26 to the partial surface 28 takes place with a constantly increasing distance to the pivot point 15, so that a projection 30 is formed on the sliding surface 25.
  • the sliding roller 19 is seated on a hinge pin 31 which passes through the recess 24 and is articulated in the two partial levers 20a, 20b of the lock lever 20.
  • the tensioning lever 18 consists of a lower part 18a, which is mounted in the fulcrum 15, and an upper part 18b, through which the hinge pin 31 passes.
  • the part 18b is provided with a spring 32 and is slidably mounted in the lower part 18a.
  • the upper part 18b has an adjusting screw 33 above the roller 19, with which the force of the spring can be adjusted and thus also the contact pressure.
  • Fig. 1 shows the switch in the on state.
  • the slide roller 19 rests under spring pressure on the projection 30, so that the necessary contact pressure of the movable contact piece on the fixed contact piece 10 is reached.
  • the contact piece carrier 12 is moved in the opening direction 34.
  • the sliding roller 19 is moved in the direction of the pivot point 15 against the force of the spring 32, so that the sliding surface 25 can now slide with its partial surface 28 over the sliding roller 19. Since the partial surface 26 has a constant distance 27 from the fulcrum, there is a uniform sliding between the sliding roller and partial surface 28 up to the end position of the contact piece carrier 12, i.
  • the force of the spring 32 is set so that the slide roller 19 cannot slide over the projection 30 during the switch-on movement. This sliding away only takes place, as explained above, when a short circuit occurs and when the movable contact carrier 12 moves in the opening direction 34 as a result.
  • the lock lever 20 is also provided with an adjusting device 35 with which a desired latch cover can be set. Furthermore is. 1 and 2, the contact carrier 12 is expediently double-walled, the clamping lever 18 being located between the two walls.
  • the slide formed according to the embodiment as a sliding roller 19 usefully can, for. B. also be a spigot.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Description

Die Erfindung bezieht sich auf einen Selbstschalter gemäß dem ersten Teil des Anspruches 1.The invention relates to a circuit breaker according to the first part of claim 1.

Ein derartiger Selbstschalter ist z.B. durch die DE-C- 11 67 957 bekannt. Bei der bekannten Bauart ist der bewegliche Kontaktträger, der das bewegliche Kontaktstück trägt, fest mit einer U-formigen Klinke verbunden, die sich auf einer Halbwelle abstützt. Die Halbwelle ist am Ende eines mehrteiligen Schloßhebels eines Schaltschlosses befestigt und überträgt die Kraft einer Kontaktandruckfeder auf den beweglichen Kontaktträger. Die Klinke mit der Halbwelle bildet somit einen federbelasteten Verklinkungsmechanismus für den beweglichen Kontaktträger. Bei einer Öffnungsbewegung des beweglichen Kontaktträgers, z. B. infolge elektrodynamischer Öffnungskräfte, rutscht die Halbwelle in die U-förmige Klinke, womit sich der Verklinkungsmechanismus löst und der bewegliche Kontaktträger sehr schnell, d. h. strombegrenzend, in seine Öffnungsstellung geschleudert wird. In dieser Stellung ist der Schalter jedoch noch nicht wieder einschaltbereit, da das Schaltschloß noch verklinkt ist. Das Schaltschloß wird erst von den normalen, nicht strombegrenzend arbeitenden Auslösern betätigt. Erst dann, wenn auch das Schaltschloß entklinkt ist, macht der bewegliche Kontaktträger eine weitere Bewegung bis in die Öffnungsstellung. Danach ist der Schalter wieder einschaltbereit.Such a self-switch is e.g. known from DE-C-11 67 957. In the known type, the movable contact carrier, which carries the movable contact piece, is firmly connected to a U-shaped pawl, which is supported on a half shaft. The half shaft is attached to the end of a multi-part lock lever of a key switch and transmits the force of a contact pressure spring to the movable contact carrier. The pawl with the half shaft thus forms a spring-loaded latching mechanism for the movable contact carrier. With an opening movement of the movable contact carrier, for. B. due to electrodynamic opening forces, the half-wave slips into the U-shaped pawl, which releases the latching mechanism and the movable contact carrier very quickly, d. H. current limiting, is thrown into its open position. In this position, however, the switch is not yet ready to be switched on again, since the switch lock is still latched. The key switch is only activated by the normal triggers that do not limit the current. Only when the switch lock is also released does the movable contact carrier make a further movement into the open position. The switch is then ready to be switched on again.

Die bekannte Bauart besitzt einen recht komplizierten Hebelmechanismus mit einer störanfälligen Halbwelle, die einem relativ hohen Verschleiß unterliegt. Außerdem ist nachteilig, daß der bewegliche Kontaktträger zwei Öffnungsbewegungen benötigt, um in die endgültige Öffnungsstellung zu gelangen.The known design has a rather complicated lever mechanism with a malfunction-prone half-wave, which is subject to relatively high wear. Another disadvantage is that the movable contact carrier requires two opening movements in order to reach the final opening position.

Der Erfindung liegt die Aufgabe zugrunde, für einen Selbstschalter der eingangs genannten Art einen unempfindlichen Verklinkungsmechanismus mit hoher mechanischer Verschleißfestigkeit und mit möglichst wenig Einzelbauteilen zu schaffen. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Im eingeschalteten Zustand liegt dabei das Gleitstück an dem im schaltschloßnahen Bereich der Gleitfläche vorgesehenen Vorsprung unter Federdruck an. Damit ist der bewegliche Kontaktträger verklinkt, wobei gleichzeitig durch das federnd angeordnete Gleitstück der erforderliche Kontaktdruck erzeugt wird. Bei einer Öffnungsbewegung des beweglichen Kontaktträgers, z. B. unter Einwirkung elektrodynamischer Kräfte auf das Kontaktsystem oder durch Einwirkung eines Schlagankers auf den beweglichen Kontaktträger, wird die aus dem Vorsprung an der Gleitfläche und aus dem Gleitstück gebildete Verklinkungsstelle gelöst. Die Lösung der Verklinkung erfolgt dadurch, daß der Vorsprung das Gleitstück entgegen der Federkraft in Richtung auf den Drehpunkt des Spannhebels zurückdrängt und somit die sich in Richtung der Kontakte erstreckende Teilfläche der Gleitfläche auf dem Gleitstück abgleiten kann, bis der bewegliche Kontaktträger seine z. B. durch einen Anschlag begrenzte Endstellung erreicht hat. Da bei diesem Vorgang das Schaltschloß noch nicht entklinkt wurde, bleiben der Schloßhebel und der Spannhebel mit dem Gleitstück in ihrer ursprünglichen Stellung, so daß nunmehr das Gleitstück am Ende der Gleitfläche in dem kontaktnahen Bereich liegt. Wenn auch das Schaltschloß gelöst wird, z. B. durch normale Auslöser des Schaltgerätes, oder auch durch den Schlaganker bewegt sich das Gleitstück von dem kontaktnahen Bereich der Gleitfläche wieder in den schaltschloßnahen Bereich der Gleitfläche, so daß damit das Schaltgerät wieder einschaltbereit ist, wobei das Gleitstück wieder vor dem Vorsprung, im schaltschloßnahen Bereich, liegt.The invention has for its object to provide an insensitive latching mechanism with high mechanical wear resistance and with as few individual components as possible for a circuit breaker of the type mentioned. This object is achieved by the characterizing features of claim 1. In the switched-on state, the slide piece rests under spring pressure on the projection provided in the area of the sliding surface near the switch lock. The movable contact carrier is thus latched, the required contact pressure being generated simultaneously by the spring-mounted slider. With an opening movement of the movable contact carrier, for. B. under the influence of electrodynamic forces on the contact system or by the action of an impact anchor on the movable contact carrier, the latching point formed from the projection on the sliding surface and from the slider is released. The release of the latching takes place in that the projection pushes the slider back against the spring force in the direction of the pivot point of the tensioning lever and thus the part surface of the sliding surface extending in the direction of the contacts can slide on the slider until the movable contact carrier has its z. B. has reached a limited end position by a stop. Since the key switch has not yet been released during this process, the lock lever and the tensioning lever with the slider remain in their original position, so that the slider is now at the end of the sliding surface in the area close to the contact. If the switch lock is released, e.g. B. by normal trigger of the switching device, or also by the impact anchor, the slider moves from the contact-near area of the sliding surface back into the switch-near area of the sliding surface, so that the switching device is ready to be switched on again, the slider again in front of the projection in the switching lock Area.

Die erfindungsgemäße Bauart benötigt sehr wenig Einzelbauteile. Die von dem Gleitstück und dem Vorsprung an der Gleitfläche gebildete Verklinkungsstelle ist wenig störanfällig, lageunabhängig und unempfindlich gegen Erschütterungen und sonstige Einflüsse. Diese Verklinkungsstelle besitzt eine außerordentlich hohe Verschleißfestigkeit. Ein weiterer Vorteil besteht darin, daß der bewegliche Kontaktträger nach Lösung der Einzelverklinkung bereits seinen vollen Öffnungswinkel erreicht hat. Dieser Öffnungswinkel entspricht etwa dem Betätigungswinkel der Schaltwelle des Schaltschlosses. Da somit die volle Öffnung des Kontaktsystems bereits beim Aufschleudern des beweglichen Kontaktträgers erfolgt, ergibt sich eine bessere Lichtbogenlöschung.The design according to the invention requires very few individual components. The latching point formed by the sliding piece and the projection on the sliding surface is less susceptible to malfunction, independent of position and insensitive to vibrations and other influences. This latching point has an extremely high wear resistance. Another advantage is that the movable contact carrier has already reached its full opening angle after the individual latch has been released. This opening angle corresponds approximately to the actuation angle of the switching shaft of the key switch. Since the full opening of the contact system already takes place when the movable contact carrier is spun on, there is a better arc quenching.

Weitere vorteilhafte Ausgestaltungen sind Gegenstände der abhängigen Ansprüche.Further advantageous refinements are the subject of the dependent claims.

In der Zeichnung ist in den Figuren 1 bis 3 schematisch ein Kontaktsystem eines Selbstschalters in drei verschiedenen Schaltstellungen dargestellt. Fig. 1, 2 zeigen Schnittbilder, Fig. 3 zeigt eine Seitenansicht.In the drawing, a contact system of a circuit breaker in three different switching positions is shown schematically in Figures 1 to 3. Fig. 1, 2 show sectional images, Fig. 3 shows a side view.

Das Kontaktsystem gemäß Fig. 1 bis 3 besitzt ein Festkontaktstück 10 und ein bewegliches Kontaktstück 11, das an einem beweglichen Kontaktstückträger 12 befestigt ist. Mit 13 ist ein an dem beweglichen Kontaktstück 11 angebrachter Anschlag zur Einwirkung eines nicht dargestellten Ankers eines Schnellstauslösers dargestellt. 14 bezeichnet eine Stromführung zum beweglichen Kontaktstück 11. Der Kontaktstückträger 12 ist in einem ortsfesten Drehpunkt 15 drehbar gelagert. Mit 16 ist ein ortsfester Anschlag für eine Kante 17 des Kontaktstückträgers 12 bezeichnet. In dem ortsfesten Drehpunkt 15 ist ferner ein Spannhebel 18 drehbar gelagert, der über eine Gleitrolle 19 mit einem Schloßhebel 20 eines Schaltschlosses 21 gelenkig verbunden ist. Die Schaltwelle des in seinen Einzelheiten nicht dargestellten Schaltshlosses 21 ist mit 22 bezeichnet. Mit 23 ist der maximale Öffnungswinkel der Schaltwelle 22 bezeichnet.The contact system according to FIGS. 1 to 3 has a fixed contact piece 10 and a movable contact piece 11 which is fastened to a movable contact piece carrier 12. A stop attached to the movable contact piece 11 for the action of an armature (not shown) of a quick-action release is shown. 14 denotes a current supply to the movable contact piece 11. The contact piece carrier 12 is rotatably mounted in a fixed pivot point 15. 16 with a fixed stop for an edge 17 of the contact piece carrier 12 is designated. In the fixed fulcrum 15, a tensioning lever 18 is also rotatably mounted, which is connected in an articulated manner via a slide roller 19 to a lock lever 20 of a switching lock 21. The switching shaft of the switching lock 21, not shown in its details, is designated by 22. With 23 the maximum opening angle of the control shaft 22 is designated.

Der Kontaktstückträger 12 besitzt an seinem oberen Ende eine nierenförmige Aussparung 24, die an der dem Drehpunkt 15 fernen Kante eine Gleitfläche 25 für die Gleitrolle 19 bildet. Die Gleitfläche 25 besitzt im kontaktnahen Bereich eine Teilfläche 26 mit einem konstanten Abstand 27 zum Drehpunkt 15 und im schaltschloßnahen Bereich eine zweite Teilfläche 28 mit einem konstanten Abstand 29 vom Drehpunkt 15. Der Übergang von der Teilfläche 26 zur Teilfläche 28 erfolgt mit stetig größer werdendem Abstand zum Drehpunkt 15, so daß auf der Gleitfläche 25 ein Vorsprung 30 gebildet wird.The contact piece carrier 12 has at its upper end a kidney-shaped recess 24 which forms a sliding surface 25 for the sliding roller 19 at the edge remote from the fulcrum 15. The sliding surface 25 has a partial surface 26 with a constant distance 27 from the fulcrum 15 in the area close to the contact and a second partial surface 28 with a constant distance 29 from the fulcrum 15 in the area close to the switch lock. The transition from the partial surface 26 to the partial surface 28 takes place with a constantly increasing distance to the pivot point 15, so that a projection 30 is formed on the sliding surface 25.

Die Gleitrolle 19 sitzt auf einem Gelenkbolzen 31, der die Aussparung 24 durchsetzt und in den beiden Teilhebeln 20a, 20b des Schloßhebels 20 gelenkig gelegert ist. Der Spannhebel 18 besteht aus einem unteren, im Drehpunkt 15 gelagerten Teil 18a, und aus einem oberen, von dem Gelenkbolzen 31 durchsetzten Teil 18b. Das Teil 18b ist mit einer Feder 32 versehen und im unteren Teil 18a gleitend gelagert. Das obere Teil 18b besitzt oberhalb der Gleitrolle 19 eine Verstellschraube 33, mit der die Kraft der Feder eingestellt werden kann und damit auch der Kontaktdruck.The sliding roller 19 is seated on a hinge pin 31 which passes through the recess 24 and is articulated in the two partial levers 20a, 20b of the lock lever 20. The tensioning lever 18 consists of a lower part 18a, which is mounted in the fulcrum 15, and an upper part 18b, through which the hinge pin 31 passes. The part 18b is provided with a spring 32 and is slidably mounted in the lower part 18a. The upper part 18b has an adjusting screw 33 above the roller 19, with which the force of the spring can be adjusted and thus also the contact pressure.

Fig. 1 zeigt den Schalter in eingeschaltetem Zustand. Bei der gezeichneten Stellung des Schaltschlosses 21 liegt die Gleitrolle 19 unter Federdruck an dem Vorsprung 30 an, so daß der notwendige Kontaktdruck des beweglichen Kontaktstückes an dem Festkontaktstück 10 erreicht ist. Erfolgt nun, z. B. im Kurzschlußfall, eine Öffnungsbewegung des beweglichen Kontaktstückes 11, indem ein Schlaganker auf den Anschlag 13 aufschlägt, so wird der Kontaktstückträger 12 in Offnungsrichtung 34 bewegt. Dabei wird die Gleitrolle 19 in Richtung auf den Drehpunkt 15 entgegen der Kraft der Feder 32 bewegt, so daß nunmehr die Gleitfläche 25 mit ihrer Teilfläche 28 über die Gleitrolle 19 abgleiten kann. Da die Teilfläche 26 einen konstanten Abstand 27 zum Drehpunkt besitzt, erfolgt ein gleichmäßiges Abgleiten zwischen Gleitrolle und Teilfläche 28 bis in die Endlage des Kontaktstückträgers 12, d. h. bis zum Erreichen des Anschlags 16 durch die Kante 17. Der Kontaktstückträger 12 hat damit seine maximale Öffnungsweite erreicht, wie dies in Fig. 2 dargestellt ist. In dieser Schalterstellung gemäß Fig. 2 ist das Schaltschloß 21 jedoch noch nicht entklinkt, d. h. der Schalter ist noch nicht wieder einschaltbereit. Die Entklinkung des Schaltschlosses erfolgt erst durch nicht dargestellte, besondere Auslöser. Dieser entklinkte Zustand des Schaltschlosses ist in Fig. 3 dargestellt. Daraus ist zu entnehmen, daß nunmehr der Spannhebel 18 wieder im schaltschloßnahen Bereich der Aussparung 24 liegt und der Schalter wieder einschaltbereit ist. Wenn der Schalter aus einer Stellung gemäß Fig. 3 heraus wieder eingeschaltet werden soll, so wird der bewegliche Kontaktstückträger 12 durch die Gleitrolle 19, die unter Federdruck an dem Vorsprung 30 anliegt, bis in die Einschaltstellung gemäß Fig. 1 mitgenommen. Die Kraft der Feder 32 ist dabei so eingestellt, daß die Gleitrolle 19 bei der Einschaltbewegung nicht über den Vorsprung 30 hinweggleiten kann. Dieses Hinweggleiten erfolgt erst, wie oben dargelegt, bei Auftreten eines Kurzschlusses und bei einer dadurch erfolgten Öffnungsbewegung des beweglichen Kontaktträgers 12 in Öffnungsrichtung 34.Fig. 1 shows the switch in the on state. In the drawn position of the switch 21, the slide roller 19 rests under spring pressure on the projection 30, so that the necessary contact pressure of the movable contact piece on the fixed contact piece 10 is reached. Now, e.g. B. in the event of a short circuit, an opening movement of the movable contact piece 11 by an impact anchor strikes the stop 13, the contact piece carrier 12 is moved in the opening direction 34. The sliding roller 19 is moved in the direction of the pivot point 15 against the force of the spring 32, so that the sliding surface 25 can now slide with its partial surface 28 over the sliding roller 19. Since the partial surface 26 has a constant distance 27 from the fulcrum, there is a uniform sliding between the sliding roller and partial surface 28 up to the end position of the contact piece carrier 12, i. H. until the stop 16 is reached by the edge 17. The contact piece carrier 12 has thus reached its maximum opening width, as shown in FIG. 2. In this switch position according to FIG. 2, the switch lock 21 has not yet been released, i. H. the switch is not yet ready to be switched on again. The key switch is only released by special triggers (not shown). This unlatched state of the switch lock is shown in Fig. 3. It can be seen from this that the tensioning lever 18 is now in the area of the recess 24 near the switch lock and the switch is ready to be switched on again. If the switch is to be switched on again from a position according to FIG. 3, the movable contact piece carrier 12 is carried along by the slide roller 19, which rests against the projection 30 under spring pressure, into the switched-on position according to FIG. 1. The force of the spring 32 is set so that the slide roller 19 cannot slide over the projection 30 during the switch-on movement. This sliding away only takes place, as explained above, when a short circuit occurs and when the movable contact carrier 12 moves in the opening direction 34 as a result.

Gemäß dem Ausführungsbeispiel ist ferner der Schloßhebel 20 mit einer Stellvorrichtung 35 versehen, mit der eine gewünschte Klinkenüberdeckung eingestellt werden kann. Ferner ist. wie aus Fig. 1 und 2 ersichtlich, der Kontaktträger 12 zweckmäßig doppelwandig ausgeführt, wobei der Spannhebel 18 zwischen den beiden Wandungen liegt. Das gemäß dem Ausführungsbeispiel als Gleitrolle 19 usgebildete Gleitstück kann zweckmäßig z. B. auch ein Zapfen sein.According to the exemplary embodiment, the lock lever 20 is also provided with an adjusting device 35 with which a desired latch cover can be set. Furthermore is. 1 and 2, the contact carrier 12 is expediently double-walled, the clamping lever 18 being located between the two walls. The slide formed according to the embodiment as a sliding roller 19 usefully can, for. B. also be a spigot.

Claims (10)

1. Automatic svitch with a movable contact carrier (12), which is borne in a locally fixed rotational centre (15) and, which is actuable by way of a switch lock (21) and seperately interlockable by way of a spring-loaded interlocking mechanism, characterised by the following features:
a) the free ends of a locking lever (2D) end of a tensioning lever (18) borne in the locally fixed rotational centre (15) are each articulatedly connected with the other by way of a sliding member (19),
b) the movable contact carrier (12) is provided with a sliding surface (25), which extends in switching direction (34) and forms a sliding guide for the sliding member (19) lying against under the pressure of a spring (32),
c) a projection (30), which is provided on the sliding surface (25) in the region near the switch lock, together with the sliding member (19) forms an interlocking place and
d) the rotationel angle of the tensioning lever (18) is somewhat greater than the opening angle, bounded by an abutment (16), of the movable contact carrier (12).
2. Automatic switch according to claim 1, characterised thereby, that the contact carrier (12) is provided with an about kidney-shaped recess (24) for the reception of the sliding member (19) end that the sliding surface (29) is formed at an inner edge, remote from the locally fixed rotational centre (15), of the recess (24), the ends of which near to the contact end near to the switch lock each form a respective limiting aboutment for the sliding roller (19).
3. Automatic switch according to claim 1 or 2, characterised thereby, that the sliding surface (25) in the region near to the contact displays a first surface portion (26) having a constant spacing (27) from the locally fixed rotational centre (15) and passing over, in the region near to the switch lock and with formation of the projection (30), with steadily increasing spacing from the locally fixed rotational centre (15) into a second surface portion (28) at constant spacing (29) from the locally fixed rotational centre (15) and that the length of the first surface portion (26) is equal to the width of contact opening of the contact carrier (12) at this place.
4. Automatic switch according to one of the claims 1 to 3, characterised thereby, that the transition from the first surface portion (26) to the second surface portion (28) with formation of the projection (30) takes place in the form of an inclined plane.
5. Automatic switch according to one of the claims 1 to 4, characterised thereby, that the locking lever (20) displays two lever portions (20a, 20b), which encompass the movable contact carrier (12) and are each connected with the other by a hinge pin (31), vhich passes through the recess (24) and carries the sliding member (19), and that the tensioning lever (18) is provided with a spring (52) and passed through by the hinge pin (31).
6. Automatic switch according to one of the claims 1 to 5, characterised thereby, that the tensioning lever (18) consists of a lower part (18a) connected with the locally fixed rotational centre (15) end an upper part (18b) passed through by the hinge pin (31), that the upper part (18b) is arranged to be slidable in the lower part (18a) vith the interposition of the spring (32) and that the upper part (18b) is provided with a set screw (33) for the setting of the contect pressure.
7. Automatic switch according to one of the claims 1 to 6, characterised thereby, that the position of the sliding member (19) is adapted in such a manner to the sliding surface (25) that the sliding member (19) in the switched-on state lies against the projection (30) with the generation of an adequate contact pressure.
e. Automatic switch according to one of the claims 1 to 7, characterised thereby, that the contact carrier (12) is constructed to be double- welled and the tensioning lever (18) is arranged between both the walls.
9. Automatic switch according to one of the claims 1 to 8, characterised thereby, that the locking lever (20) is adjustable in length by a setting device (35).
10. Automatic switch according to one of the claims 1 to 9, characterised thereby, that the sliding member (19) is constructed as sliding roller or spigot.
EP19820107287 1981-08-22 1982-08-11 Automatic switch Expired EP0072972B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813133285 DE3133285C2 (en) 1981-08-22 1981-08-22 Auto switch
DE3133285 1981-08-22

Publications (3)

Publication Number Publication Date
EP0072972A2 EP0072972A2 (en) 1983-03-02
EP0072972A3 EP0072972A3 (en) 1984-12-19
EP0072972B1 true EP0072972B1 (en) 1986-06-11

Family

ID=6139902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820107287 Expired EP0072972B1 (en) 1981-08-22 1982-08-11 Automatic switch

Country Status (2)

Country Link
EP (1) EP0072972B1 (en)
DE (1) DE3133285C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT206253Z2 (en) * 1985-10-18 1987-07-13 Sace Spa ELECTRIC CIRCUIT BREAKER CURRENT LIMITER FOR OPENING OF CONTACTS FOR ELECTRODYNAMIC REPULSION.
US4998081A (en) * 1989-05-18 1991-03-05 Siemens Energy & Automation, Inc. Power interrupter with force-sensitive contact latch
DE4022078A1 (en) * 1990-07-10 1992-01-16 Siemens Ag CIRCUIT BREAKER WITH INDEPENDENT INTERLOCKING DEVICE OF THE MOVABLE SWITCHING CONTACT
DE4337344B4 (en) * 1993-11-02 2005-08-25 Moeller Gmbh Current limiting contact system for circuit breakers
CZ300885B6 (en) * 2002-01-22 2009-09-02 Oez S.R.O. Tension spring hinge, in particular for springs of switching devices

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1413974A1 (en) * 1962-03-12 1969-02-06 Licentia Gmbh Auto switch
FR1372874A (en) * 1963-10-18 1964-09-18 Licentia Gmbh Automatic switch with electrodynamic opening
DE1513341A1 (en) * 1965-12-29 1969-12-18 Licentia Gmbh Circuit breaker with current-limiting contact system
US3562680A (en) * 1969-09-17 1971-02-09 Fuji Electric Co Ltd Circuit breaker
DE2128633A1 (en) * 1971-06-09 1973-01-04 Bbc Brown Boveri & Cie SELF-SWITCH WITH MAGNETIC AND ELECTRODYNAMIC SHORT-CIRCUIT RELEASE
DE2231179A1 (en) * 1972-06-26 1974-01-17 Bbc Brown Boveri & Cie CIRCUIT-BREAKER IN SINGLE- OR MULTIPOLE VERSION
JPS5942935B2 (en) * 1978-07-05 1984-10-18 富士電機株式会社 circuit breaker

Also Published As

Publication number Publication date
EP0072972A3 (en) 1984-12-19
EP0072972A2 (en) 1983-03-02
DE3133285C2 (en) 1984-05-30
DE3133285A1 (en) 1983-03-10

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