WO1998005053A1 - Current-limiting power circuit-breaker - Google Patents

Current-limiting power circuit-breaker Download PDF

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Publication number
WO1998005053A1
WO1998005053A1 PCT/EP1997/003621 EP9703621W WO9805053A1 WO 1998005053 A1 WO1998005053 A1 WO 1998005053A1 EP 9703621 W EP9703621 W EP 9703621W WO 9805053 A1 WO9805053 A1 WO 9805053A1
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WO
WIPO (PCT)
Prior art keywords
circuit breaker
rotatable
contact
breaker according
driver
Prior art date
Application number
PCT/EP1997/003621
Other languages
German (de)
French (fr)
Inventor
Lutz Thilker
Wolfgang Erven
Albert Zacharias
Original Assignee
Klöckner-Moeller 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 Klöckner-Moeller Gmbh filed Critical Klöckner-Moeller Gmbh
Priority to DE59709980T priority Critical patent/DE59709980D1/en
Priority to EP97932787A priority patent/EP0916151B1/en
Publication of WO1998005053A1 publication Critical patent/WO1998005053A1/en

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20Bridging contacts
    • H01H1/2041Rotating bridge
    • H01H1/205Details concerning the elastic mounting of the rotating bridge in the rotor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02Protective 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
    • H01H77/10Protective 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
    • H01H77/102Protective 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
    • H01H77/104Protective 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 with a stable blow-off position

Definitions

  • the invention relates to a current-limiting circuit breaker with at least one two-armed rotary contact, which connects two fixed contact pieces in their closed basic position, the fixed contact pieces being designed in such a way that, in the event of an overload, there is electrodynamic force between them and the current-carrying rotary contact piece result which pivot the rotatable contact piece against the pressure of at least one contact spring from its closed position into an open securing position.
  • Such a circuit breaker is known from EP-Al-560 696. It comprises a contact arrangement arranged in a switching chamber housing with two fixed switching pieces, which are each connected to corresponding connecting terminals via rail-shaped conductors.
  • a two-armed switching element rotatable about an axis is provided, which in its closed position, ie basic position, connects the two fixed switching elements to one another, the fixed switching elements being designed in such a way that in the event of an overload, for example in the event of a short circuit, between them and the current-carrying rotatable switching element, due to the magnetic fields which form, results in forces which pivot the rotatable switching element from its closed position, ie open electrodynamically, and bring it into an open end position.
  • a current-limiting circuit breaker is known from EP-Al-406 130, in which a cam-like latching element is arranged on the movable switching piece, which, when the switching piece is pivoted from its basic position into a securing position, is pivoted backwards by a spring-loaded pivoting blocking element the basic position is prevented.
  • the object of the invention is to provide a circuit breaker of the type mentioned at the outset, in which, in the secured position of the rotatable switching piece, it is held securely until it is released by actuating a corresponding actuating element.
  • An advantageous embodiment consists in that a control cam is arranged on the locking member, the side of which facing the latching element is designed as a locking surface which fixes the rotatable switching piece located in the securing position in this position.
  • a driver which coaxially surrounds the axis and is arranged in a rotationally fixed manner on an actuating element of the circuit breaker. which has at least one slot-shaped recess extending in the circumferential direction, along which the nose-shaped latching element can be pivoted.
  • the first end of the gap-shaped recess seen in the circumferential direction has a driver surface which is selected such that it is only reached by the nose-shaped latching element after the securing position of the rotatable switching element has been reached and, in the event of an electrodynamic opening of the rotatable switching element, brakes its rotary movement .
  • the housing parts are expediently designed in such a way that the stop surfaces of the nose-shaped latching elements lie in the housing parts.
  • the stop surfaces are preferably made of a damping material.
  • a guide pin is expediently provided on the side of the driver facing away from the latching element, on which the locking member is arranged to be longitudinally displaceable.
  • the other end of the gap-shaped recess preferably has a stop surface against which the rotatable contact piece rests in its basic position.
  • the rotatable contact piece can also be pivoted into its securing position by means of the stop surface when the circuit breaker is actuated (e.g. manually) by rotating the corresponding actuating element against the pressure of corresponding contact springs.
  • the rotatable contact piece is held in its securing position by blocking the nose-shaped latching elements by means of at least one axially displaceable locking member.
  • two lug-shaped latching elements are provided on the rotatable switching element, offset by 180 °.
  • two axially displaceable spring-loaded locking members are provided, which are arranged axially in front of and behind the rotatable switching element and whose locking surfaces together result in a surface that prevents the rotating switching element from pivoting back into its basic position.
  • Fig.l a perspective view of the contact arrangement of a circuit breaker according to the invention, in which a
  • FIG. 2 shows a perspective view of the rotatable contact piece of the contact arrangement shown in FIG. 1 with a driver part arranged on an axis and two locking members;
  • FIG. 3 shows a section through the rotatable switching element shown in FIG. 2 in its basic position along the line labeled III-III there, for the sake of Clarity, the rear locking member is not shown and the fixed switching elements not shown in Figure 2 are shown in dashed lines;
  • FIG. 5 shows a perspective view of a locking element shown enlarged.
  • Fig.l 1 denotes a circuit breaker, which comprises a switching chamber housing with the housing parts 2, 3 and a contact arrangement arranged in the housing.
  • two terminals 4, 5 are provided, which are connected to two fixed switching elements 8, 9 (FIG. 3) via loop-shaped rail-shaped conductors 6, 7.
  • the fixed contact pieces 8, 9 are bridged by means of a contact piece 11 which can be rotated about an axis 10 against the pressure of corresponding contact springs 100 (FIG. 3).
  • the two arms 12, 13 of the rotatable switching element 11 press against contact pads 14, 15 against corresponding contact pads 16, 17 of the fixed switching elements 8, 9.
  • FIG. 2 denotes a driver which can also be pivoted about the axis 10 and which can be connected via two guide pins 21, each with a claw coupling 22, 23. These claw couplings are connected, for example, via corresponding actuating elements of the circuit breaker of the circuit breaker 1, not shown, or to adjacent contact arrangements for further network phases.
  • the driver 20 has a gap-shaped recess 24 in its central region, which extends in the circumferential direction of the driver and along which the nose-shaped locking elements 18, 19 are pivotable.
  • the recess 24 has a driver surface 25 or 27 and a stop surface 26 or 28 (FIG.
  • the locking members 31, 32 are rotatably mounted in the switching chamber housing and for this purpose have cams 39, 40 which engage in corresponding rail-shaped recesses in the switching chamber housing (not shown).
  • the mode of operation of the locking elements 31, 32 is discussed below: If, for example, an overload occurs (for example a short circuit), the rotatable switching element 11 is rotated in the direction of the arrow 41 (FIG. 3) due to the magnetic forces until the nose-shaped latching elements 18, 19 strike the stop surfaces 26, 28 of the recess 24 and prevent the switching piece 11 from turning further. Even before the stop surfaces 26, 28 have been reached, the rotatable switching element 11 has reached its securing position, and the latching elements 18, 19 have released the control cams 33, 34, so that these are further pressed together by the pressure of the locking member springs 101 and with their, the latching elements 18, 19 facing blocking surfaces 42, 43 (FIG.
  • the control cams 33, 34 are released by the latching elements 18, 19 and in turn form a blocking surface which prevents the rotatable switching piece 11 from pivoting back.
  • the two locking members 31, 32 are supported on the driver 20 via wedge-shaped surfaces 44-47. If the driver 20 is rotated in the direction of the basic position of the rotatable switching piece 11, the corresponding wedge-shaped surfaces 46, 47 of the driver 20 print the locking members 31, 32 away from the switching piece and the nose-shaped latching elements 18, 19 become free. The contact springs 100 then print the rotatable switching piece 11 back into its basic position. If the switching piece 11 has been pivoted into the securing position by rotation of the driver 20, the corresponding contact springs 100 also press the driver 20 into the starting position. A corresponding lock spring of the circuit breaker of the circuit breaker, not shown, can therefore be dimensioned weaker than in known circuit breakers.
  • This minimum distance is to be selected such that when the driver 20 rotates, the control cams 33, 34 of the locking members 31, 32 are pressed so far in the direction of the locking member springs 101 due to the wedge-shaped surfaces 44 to 47 that the locking elements 18, 19 are no longer through Control cams 33, 34 are blocked.
  • the stop surfaces 26, 28 are made of a damping material, e.g. made of plastic, rubber or an energy-consuming metal foam.
  • a damping material e.g. made of plastic, rubber or an energy-consuming metal foam.
  • Another advantageous alternative is to design the housing parts 2, 3 in such a way that the stop faces lie in the housing parts.
  • the invention is of course not limited to the embodiment described above.
  • the invention can also be implemented with only one locking member, provided the locking surface on the control cam is chosen to be correspondingly wide.
  • the control cam can also be provided with a recess which is located in the respective front surface of the control cam, so that the latching element is pressed into this recess after a predeterminable pivoting path of the rotatable switching element.

Abstract

The invention concerns a current-limiting power circuit-breaker with a contact arrangement including two or more fixed contact members (8, 9) and containing one or more two-armed contact members (11) that can rotate about an axle (10), and in their closed normal position connect the two fixed contact members (8, 9); the fixed contact members (8, 9) are designed so that, in case of an overload, the rotating contact member (11) swivels into an opened safety position, due to electrodynamic forces. In order to have the rotatable contact member (11) held securely in the safety position until released by actuation of a corresponding control element, the invention proposes that one or more lug-shaped latching members (18, 19) be arranged on the rotatable contact member (11), which are moved along with it if the contact member (11) swivels from the normal position into the safety position, and in this position be prevented from swivelling back into the normal position by one or more spring-loaded locking elements (31, 32) that are arranged in the interrupter chamber so that they cannot rotate, and can be shifted in the axial direction.

Description

B e s c h r e i b u n g Description
Stro begrenzender LeistungsschalterCurrent limiting circuit breaker
Technisches GebietTechnical field
Die Erfindung betrifft einen strombegrenzenden Leistungs- Schalter mit mindestens einem zweiarmigen drehbaren Schaltstück, welches in seiner geschlossenen Grundstellung zwei feste Schaltstücke miteinander verbindet, wobei die festen Schaltstücke derart ausgestaltet sind, daß sich bei einem ϋberlastfall zwischen ihnen und dem stromdurchflossenen dreh- baren Schaltstück elektrodynamische Kräfte ergeben, die das drehbare Schaltstück gegen den Druck mindestens einer Kontaktfeder aus seiner geschlossenen Stellung in eine geöffnete Sicherungsstellung verschwenken.The invention relates to a current-limiting circuit breaker with at least one two-armed rotary contact, which connects two fixed contact pieces in their closed basic position, the fixed contact pieces being designed in such a way that, in the event of an overload, there is electrodynamic force between them and the current-carrying rotary contact piece result which pivot the rotatable contact piece against the pressure of at least one contact spring from its closed position into an open securing position.
Stand der TechnikState of the art
Ein derartiger Leistungsschalter ist aus der EP-Al-560 696 bekannt. Er umfaßt eine in einem Schaltkammergehäuse angeord- nete Kontaktanordnung mit zwei festen Schaltstücken, welche jeweils über schienenförmige Leiter mit entsprechenden Anschlußklemmen verbunden sind. Außerdem ist ein zweiarmiges, um eine Achse drehbares Schaltstück vorgesehen, welches in seiner geschlossenen Stellung, d.h. Grundstellung, die beiden festen Schaltstücke miteinander verbindet, wobei die festen Schaltstücke derart ausgestaltet sind, daß sich im ϋberlastfall, z.B. bei einem Kurzschluß, zwischen ihnen und dem stromdurchflossenen drehbaren Schaltstück aufgrund der sich ausbildenden Magnetfelder Kräfte ergeben, die das drehbare Schaltstück aus seiner geschlossenen Stellung verschwenken, d.h. elektrodynamisch öffnen, und in eine geöffnete Endstellung bringen. In dieser Sicherungsstellung wird das drehbare Schaltstuck dann so lange gehalten, bis es durch Betätigung eines entsprechenden Stellelementes wieder freigegeben und beispielsweise mittels einer vorgespannten Druckfeder wieder in seine Grund- Stellung zuruckgeschwenkt wird. Aus der EP-Al-406 130 ist ein strombegrenzender Leistungsschalter bekannt, bei dem an dem beweglichem Schaltstuck ein nockenartiges Rastelement angeordnet ist, welches sich bei einem Verschwenken des Schaltstuckes von seiner Grundstellung in eine Sicherungsstellung von einem federbeaufschlagten schwenkbaren Sperrglied an dem Zuruck- schwenken in die Grundstellung gehindert wird.Such a circuit breaker is known from EP-Al-560 696. It comprises a contact arrangement arranged in a switching chamber housing with two fixed switching pieces, which are each connected to corresponding connecting terminals via rail-shaped conductors. In addition, a two-armed switching element rotatable about an axis is provided, which in its closed position, ie basic position, connects the two fixed switching elements to one another, the fixed switching elements being designed in such a way that in the event of an overload, for example in the event of a short circuit, between them and the current-carrying rotatable switching element, due to the magnetic fields which form, results in forces which pivot the rotatable switching element from its closed position, ie open electrodynamically, and bring it into an open end position. In In this securing position, the rotatable switching piece is then held until it is released again by actuating a corresponding actuating element and pivoted back into its basic position, for example by means of a prestressed compression spring. A current-limiting circuit breaker is known from EP-Al-406 130, in which a cam-like latching element is arranged on the movable switching piece, which, when the switching piece is pivoted from its basic position into a securing position, is pivoted backwards by a spring-loaded pivoting blocking element the basic position is prevented.
Darstellung der ErfindungPresentation of the invention
Aufgabe der Erfindung ist es, einen Leistungsschalter der eingangs erwähnten Art anzugeben, bei dem in der Sicherungsstellung des drehbaren Schaltstuckes dieses bis zur Freigabe durch Betätigung eines entsprechenden Stellelementes sicher gehalten wird.The object of the invention is to provide a circuit breaker of the type mentioned at the outset, in which, in the secured position of the rotatable switching piece, it is held securely until it is released by actuating a corresponding actuating element.
Diese Aufgabe wird erfindungsgemaß dadurch gelost, daß in der Sicherungsstellung das drehfest in dem Schaltkammergehause angeordnete mindestens eine Sperrglied an dem nasenformig ausgebildeten mindestens einem Rastelement in Richtung der Drehachse des drehbaren Schaltstuckes verschieblich angreift.This object is achieved according to the invention in that, in the securing position, the at least one locking element, which is arranged in the switching chamber housing in a rotationally fixed manner, slidably engages the at least one locking element in the direction of the axis of rotation of the rotating switching piece.
Eine vorteilhafte Ausfuhrungsform besteht darin, daß an dem Sperrglied ein Steuernocken angeordnet ist, dessen dem Rast- element zugewandte Seite als Sperrflache ausgebildet ist, die das in der Sicherungsstellung befindliche drehbare Schaltstuck in dieser Lage fixiert.An advantageous embodiment consists in that a control cam is arranged on the locking member, the side of which facing the latching element is designed as a locking surface which fixes the rotatable switching piece located in the securing position in this position.
Bei einer weiteren vorteilhaften Ausfuhrungsform ist ein die Achse koaxial umgebender und an einem Stellelement des Lei- stungsschalters drehfest angeordneter Mitnehmer vorgesehen, welcher mindestens eine sich in Umfangsrichtung erstreckende spaltförmige Ausnehmung aufweist, entlang der das nasenförmige Rastelement verschwenkbar ist. Insbesondere weist das in Umfangsrichtung gesehene erste Ende der spaltförmigen Aus- nehmung eine Mitnehmerfläche auf, die derart gewählt ist, daß sie von dem nasenförmigen Rastelement erst nach Erreichen der Sicherungsstellung des drehbaren Schaltstückes erreicht wird und im Falle eines elektrodynamischen öffnens des drehbaren Schaltstückes dessen Drehbewegung abbremst. Zweckmäßigerweise sind die Gehäuseteile derart ausgebildet, daß die Anschlagsflächen der nasenförmigen Rastelemente in den Gehäuseteilen liegen. Dabei bestehen die Anschlagsflächen vorzugsweise aus einem dämpfenden Material. Zweckmäßigerweise ist auf der dem Rastelement abgewandten Seite des Mitnehmers ein Führungs- zapfen vorgesehen, auf welchem das Sperrglied längsverschiebbar angeordnet ist.In a further advantageous embodiment, a driver is provided which coaxially surrounds the axis and is arranged in a rotationally fixed manner on an actuating element of the circuit breaker. which has at least one slot-shaped recess extending in the circumferential direction, along which the nose-shaped latching element can be pivoted. In particular, the first end of the gap-shaped recess seen in the circumferential direction has a driver surface which is selected such that it is only reached by the nose-shaped latching element after the securing position of the rotatable switching element has been reached and, in the event of an electrodynamic opening of the rotatable switching element, brakes its rotary movement . The housing parts are expediently designed in such a way that the stop surfaces of the nose-shaped latching elements lie in the housing parts. The stop surfaces are preferably made of a damping material. A guide pin is expediently provided on the side of the driver facing away from the latching element, on which the locking member is arranged to be longitudinally displaceable.
Vorzugsweise weist das andere Ende der spaltförmigen Ausnehmung eine Anschlagsfläche auf, an der das drehbare Schaltstück in seiner Grundstellung anliegt. Außerdem kann das drehbare Schaltstück mittels der Anschlagsfläche bei einer (z.B. manuellen) Betätigung des Leistungsschalters durch Drehung des entsprechenden Stellelementes gegen den Druck entsprechender Kontaktfedern ebenfalls in seine Sicherungsstellung ver- schwenkt werden. Das drehbare Schaltstück wird auch in diesem Fall durch Blockierung der nasenförmigen Rastelemente mittels mindestens eines axial verschiebbaren Sperrgliedes in seiner Sicherungsstellung gehalten.The other end of the gap-shaped recess preferably has a stop surface against which the rotatable contact piece rests in its basic position. In addition, the rotatable contact piece can also be pivoted into its securing position by means of the stop surface when the circuit breaker is actuated (e.g. manually) by rotating the corresponding actuating element against the pressure of corresponding contact springs. In this case too, the rotatable contact piece is held in its securing position by blocking the nose-shaped latching elements by means of at least one axially displaceable locking member.
Um ferner auf einfache Weise eine Freigabe des drehbaren Schaltstückes aus der Sicherungsstellung zu erreichen, hat es sich als vorteilhaft erwiesen, die Berührungsflächen des Mitnehmerteiles und des Sperrgliedes mindestens in einem Teilbereich keilförmig auszugestalten, so daß bei einer Drehung des Mitnehmers mittels des entsprechenden Stellelementes eine axiale Verschiebung des Sperrgliedes gegen die Rückstellkraft entsprechender Sperrgliedfedern erfolgt. Dadurch wird die Rastnase von dem Sperrglied freigegeben und das Sperrstück durch die Kontaktfedern wiederum in seine Grundstellung zurückgeschwenkt.In order to further easily release the rotatable contact from the securing position, it has proven to be advantageous to design the contact surfaces of the driver part and the locking member in a wedge shape at least in a partial area, so that when the driver rotates by means of the corresponding actuating element, an axial Displacement of the locking member against the restoring force corresponding locking member springs. As a result, the locking lug is released by the locking member and the locking piece is pivoted back into its basic position by the contact springs.
Um das drehbare Schaltstück besonders sicher in seiner geöffneten Stellung zu halten, sind bei einer weiteren Ausführungsform an dem drehbaren Schaltstück zwei um 180° versetzt angeordnete nasenförmige Rastelemente vorgesehen. Zur Blockierung der Rastelemente sind dabei zwei in axialer Richtung verschiebbare federbeaufschlagte Sperrglieder vorgesehen, die axial vor und hinter dem drehbaren Schaltstück angeordnet sind und deren Sperrflächen zusammen eine Fläche ergeben, die das Zurückschwenken des drehbaren Schaltstückes in seine Grund- Stellung verhindert.In order to hold the rotatable switching element in its open position particularly securely, in a further embodiment two lug-shaped latching elements are provided on the rotatable switching element, offset by 180 °. To block the locking elements, two axially displaceable spring-loaded locking members are provided, which are arranged axially in front of and behind the rotatable switching element and whose locking surfaces together result in a surface that prevents the rotating switching element from pivoting back into its basic position.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden, anhand von Figuren erläuterten Ausführungsbeispiel. Es zeigen:Further details and advantages of the invention result from the following exemplary embodiment explained with reference to figures. Show it:
Fig.l: eine perspektivische Ansicht der Kontaktanordnung eines erfindungsgemäßen Leistungsschalters, bei dem einFig.l: a perspective view of the contact arrangement of a circuit breaker according to the invention, in which a
Gehäuseteil des zweiteiligen Schaltkammergehäuses abgenommen ist;Housing part of the two-part interrupter housing is removed;
Fig.2: eine perspektivische Ansicht des in Fig.l dargestellten drehbaren Schaltstückes der Kontaktanordnung mit einem auf einer Achse angeordneten Mitnehmerteil und zwei Sperrgliedern;2 shows a perspective view of the rotatable contact piece of the contact arrangement shown in FIG. 1 with a driver part arranged on an axis and two locking members;
Fig.3: einen Schnitt durch das in Fig.2 dargestellte drehbare Schaltstück in seiner Grundstellung entlang der dort mit III-III bezeichneten Linie, wobei aus Gründen der Übersichtlichkeit das hintere Sperrglied nicht dargestellt ist und die in Fig.2 nicht wiedergegebenen festen Schaltstücke gestrichelt eingezeichnet sind;3 shows a section through the rotatable switching element shown in FIG. 2 in its basic position along the line labeled III-III there, for the sake of Clarity, the rear locking member is not shown and the fixed switching elements not shown in Figure 2 are shown in dashed lines;
Fig.4: einen Fig.3 entsprechenden Schnitt mit in seiner Sicherungsstellung befindlichen drehbaren Schaltstück und4: a section corresponding to FIG. 3 with the rotatable contact piece in its securing position and
Fig.5: eine perspektivische Ansicht eines vergrößert dargestellten Sperrgliedes.5 shows a perspective view of a locking element shown enlarged.
Bester Weg zur Ausführung der ErfindungBest way to carry out the invention
In Fig.l ist mit 1 ein Leistungsschalter bezeichnet, der ein Schaltkammergehäuse mit den Gehäuseteilen 2, 3 und einer in dem Gehäuse angeordneten Kontaktanordnung umfaßt. Zum Anschluß des Leistungsschalters 1 an einen entsprechenden Stromkreis sind zwei Anschlußklemmen 4, 5 vorgesehen, die über schleifen- förmig ausgebildete schienenförmige Leiter 6, 7 mit zwei festen Schaltstücken 8, 9 (Fig.3) verbunden sind. Die festen Schaltstücke 8, 9 werden mittels eines um eine Achse 10 gegen den Druck entsprechender Kontaktfedern 100 (Fig.3) drehbaren Schaltstückes 11 überbrückt. Dabei drücken die beiden Arme 12, 13 des drehbaren Schaltstückes 11 über Kontaktauflagen 14, 15 gegen entsprechende Kontaktauflagen 16, 17 der festen Schaltstücke 8, 9. An dem drehbaren Schaltstück 11 sind zwei gegenüberliegende nasenförmige Rastelemente 18, 19 drehfest angeordnet. Mit 20 ist in Fig.2 ein ebenfalls um die Achse 10 schwenkbarer Mitnehmer bezeichnet, der über zwei Führungs- zapfen 21 mit jeweils einer Klauenkupplung 22, 23 verbindbar ist. Diese Klauenkupplungen sind beispielsweise über entsprechende Stellelemente des nicht dargestellten Schaltschlosses des Leistungsschalters 1 bzw. mit benachbarten Kontaktanordnungen für weitere Netzphasen verbunden. Der Mitnehmer 20 be- sitzt in seinem mittleren Bereich eine spaltförmige Ausnehmung 24, die sich in Umfangsrichtung des Mitnehmers erstreckt und entlang welcher die nasenförmigen Rastelemente 18 , 19 verschwenkbar sind. Dabei weist die Ausnehmung 24 - in Umfangsrichtung gesehen - in bezug auf jedes der beiden Rastelemente jeweils eine Mitnehmerfläche 25 bzw. 27 und eine Anschlags- fläche 26 bzw. 28 (Fig.3) auf, deren Funktionen nachfolgend noch erläutert werden. Zwischen den Mitnehmerflächen 25 bzw. 27 und den ihnen gegenüberliegenden Armen 12, 13 des drehbaren Schaltstückes 11 ist jeweils ein sektorförmiger Spalt vorhanden, der die Toleranzen und Abbrandverluste der Schaltstücke ausgleicht. Auf den Fuhrungszapfen 21 des Mitnehmers 20 sind zwei ringförmige Sperrglieder 31, 32 mit in axialer Richtung vorstehenden Steuernocken 33, 34 gelagert. In Fig.l und Fig.2 ist das Sperrglied 31 aus Übersichtlichkeitsgründen zum Betrachter hin verschoben dargestellt. Diese Sperrglieder werden axial über Federn 101 (wobei in Fig.2 nur eine der beiden Federn gestrichelt angedeutet ist) gegen das drehbare Schaltstück 11 gedrückt, so daß die dem Schaltstück zugewandten Frontflächen 35, 36 der Steuernocken 33, 34 an den Außenflächen 37, 38 der nasenförmigen Rastelemente 18, 19 anliegen. Die Sperrglieder 31, 32 sind drehfest in dem Schaltkammergehäuse gelagert und besitzen hierzu Nocken 39, 40, die in entsprechende schienenförmige Ausnehmungen des Schaltkammergehäuses eingreifen (nicht dargestellt) .In Fig.l, 1 denotes a circuit breaker, which comprises a switching chamber housing with the housing parts 2, 3 and a contact arrangement arranged in the housing. To connect the circuit breaker 1 to a corresponding circuit, two terminals 4, 5 are provided, which are connected to two fixed switching elements 8, 9 (FIG. 3) via loop-shaped rail-shaped conductors 6, 7. The fixed contact pieces 8, 9 are bridged by means of a contact piece 11 which can be rotated about an axis 10 against the pressure of corresponding contact springs 100 (FIG. 3). The two arms 12, 13 of the rotatable switching element 11 press against contact pads 14, 15 against corresponding contact pads 16, 17 of the fixed switching elements 8, 9. On the rotatable switching element 11, two opposite nose-shaped latching elements 18, 19 are arranged in a rotationally fixed manner. In FIG. 2, 20 denotes a driver which can also be pivoted about the axis 10 and which can be connected via two guide pins 21, each with a claw coupling 22, 23. These claw couplings are connected, for example, via corresponding actuating elements of the circuit breaker of the circuit breaker 1, not shown, or to adjacent contact arrangements for further network phases. The driver 20 has a gap-shaped recess 24 in its central region, which extends in the circumferential direction of the driver and along which the nose-shaped locking elements 18, 19 are pivotable. The recess 24 has a driver surface 25 or 27 and a stop surface 26 or 28 (FIG. 3), the functions of which will be explained below, with respect to each of the two latching elements. Between the driver surfaces 25 and 27 and the arms 12, 13 of the rotatable contact piece 11 opposite them, there is a sector-shaped gap in each case, which compensates for the tolerances and erosion losses of the contact pieces. On the guide pin 21 of the driver 20, two annular locking members 31, 32 are mounted with control cams 33, 34 projecting in the axial direction. In Fig.l and Fig.2, the locking member 31 is shown shifted towards the viewer for reasons of clarity. These locking members are pressed axially via springs 101 (only one of the two springs being indicated by dashed lines in FIG. 2) against the rotatable switching element 11, so that the front surfaces 35, 36 of the control cams 33, 34 facing the switching element on the outer surfaces 37, 38 of the nose-shaped locking elements 18, 19 abut. The locking members 31, 32 are rotatably mounted in the switching chamber housing and for this purpose have cams 39, 40 which engage in corresponding rail-shaped recesses in the switching chamber housing (not shown).
Im folgenden wird auf die Wirkungsweise der Sperrglieder 31, 32 eingegangen: Tritt beispielsweise ein überlastfall (z.B. ein Kurzschluß) ein, so wird das drehbare Schaltstück 11 aufgrund der magnetischen Kräfte in Richtung des Pfeiles 41 (Fig.3) gedreht, bis die nasenförmigen Rastelemente 18, 19 auf die Anschlagsflächen 26, 28 der Ausnehmung 24 auftreffen und ein Weiterdrehen des Schaltstückes 11 verhindern. Bereits vor Erreichen der Anschlagsflächen 26, 28 hat das drehbare Schaltstück 11 seine Sicherungsstellung erreicht, und die Rastelemente 18, 19 haben die Steuernocken 33, 34 freigegeben, so daß diese durch den Druck der Sperrgliedfedern 101 weiter aufeinander zugedrückt werden und mit ihren, den Rastelementen 18, 19 zugewandten Sperrflachen 42, 43 (Fig.5) ein Zurückdrehen der Rastelemente 18, 19 — und damit auch des drehbaren Schaltstuckes 11 - verhindern (Fig.4). Ahnlich ist der Vorgang, wenn statt einer elektrodynamischen Drehung des dreh- baren Schaltstuckes 11 dieses durch Betätigung des Mitnehmers 20 verschwenkt wird, z.B. durch manuelle Betätigung des Leistungsschalters, wobei das Stellelement über die Klauenkupplung 22 mit dem Mitnehmer verbunden ist. In diesem Fall werden über die Mitnehmerflachen 25, 27 der spaltförmigen Ausnehmung 24 das drehbare Schaltstuck 11 und damit auch die nasenförmigen Rastelemente 18, 19 mitgedreht. Sind die nasenförmigen Rastelemente um einen Winkel verschwenkt worden, der der Sicherungsstellung des drehbaren Schaltstuckes 11 entspricht, werden die Steuernocken 33, 34 von den Rastelementen 18, 19 freigegeben und bilden wiederum eine Sperrflache, die ein Zuruckschwenken des drehbaren Schaltstuckes 11 verhindert.The mode of operation of the locking elements 31, 32 is discussed below: If, for example, an overload occurs (for example a short circuit), the rotatable switching element 11 is rotated in the direction of the arrow 41 (FIG. 3) due to the magnetic forces until the nose-shaped latching elements 18, 19 strike the stop surfaces 26, 28 of the recess 24 and prevent the switching piece 11 from turning further. Even before the stop surfaces 26, 28 have been reached, the rotatable switching element 11 has reached its securing position, and the latching elements 18, 19 have released the control cams 33, 34, so that these are further pressed together by the pressure of the locking member springs 101 and with their, the latching elements 18, 19 facing blocking surfaces 42, 43 (FIG. 5) prevent the locking elements 18, 19 - and thus also the rotatable switching piece 11 - from being turned back (FIG. 4). The process is similar if, instead of an electrodynamic rotation of the rotatable switching piece 11, it is pivoted by actuation of the driver 20, for example by manual actuation of the circuit breaker, the actuating element being connected to the driver via the claw coupling 22. In this case, the rotatable switching piece 11 and thus also the nose-shaped latching elements 18, 19 are also rotated via the driver surfaces 25, 27 of the gap-shaped recess 24. If the nose-shaped latching elements have been pivoted through an angle which corresponds to the securing position of the rotatable switching piece 11, the control cams 33, 34 are released by the latching elements 18, 19 and in turn form a blocking surface which prevents the rotatable switching piece 11 from pivoting back.
Um das drehbare Schaltstuck 11 aus der Sicherungsstellung wieder zu losen, ist vorgesehen, daß sich die beiden Sperr- glieder 31, 32 an dem Mitnehmer 20 über keilförmige Flachen 44-47 abstutzen. Wird nämlich der Mitnehmer 20 in Richtung auf die Grundstellung des drehbaren Schaltstuckes 11 verdreht, so drucken die entsprechenden keilförmigen Flachen 46, 47 des Mitnehmers 20 die Sperrglieder 31, 32 von dem Schaltstuck weg und die nasenförmigen Rastelemente 18, 19 werden frei. Die Kontaktfedern 100 drucken dann das drehbare Schaltstuck 11 in seine Grundstellung zurück. Sofern das Schaltstuck 11 durch Drehung des Mitnehmers 20 in die Sicherungsstellung verschwenkt wurde, drucken die entsprechenden Kontaktfedern 100 auch den Mitnehmer 20 in die Ausgangsstellung. Eine entsprechende Schloßfeder des nicht dargestellten Schaltschlosses des Leistungsschalters kann daher schwacher als bei bekannten Leistungsschaltern dimensioniert werden.In order to detach the rotatable switching piece 11 from the securing position, it is provided that the two locking members 31, 32 are supported on the driver 20 via wedge-shaped surfaces 44-47. If the driver 20 is rotated in the direction of the basic position of the rotatable switching piece 11, the corresponding wedge-shaped surfaces 46, 47 of the driver 20 print the locking members 31, 32 away from the switching piece and the nose-shaped latching elements 18, 19 become free. The contact springs 100 then print the rotatable switching piece 11 back into its basic position. If the switching piece 11 has been pivoted into the securing position by rotation of the driver 20, the corresponding contact springs 100 also press the driver 20 into the starting position. A corresponding lock spring of the circuit breaker of the circuit breaker, not shown, can therefore be dimensioned weaker than in known circuit breakers.
Um ein sicheres Losen des drehbaren Schaltstuckes 11 zu gewahrleisten, ist es erforderlich, daß nach dem Blockieren der nasenförmigen Rastelemente 18, 19 durch die Sperrflächen 42, 43 der Steuernocken 33, 34 der Mitnehmer 20 noch einen gewissen Freilauf besitzt, das heißt, die Rastelemente 18, 19 also nicht zwischen den Anschlagsflächen 26, 28 des Mitnehmers 20 und den Sperrflächen 42, 43 der Steuernocken 33, 34 eingeklemmt sind. Vielmehr muß in der Sicherungsstellung ein entsprechender Mindestabstand zwischen den Anschlagsflächen 26, 28 und den entsprechenden Rastelementen 18, 19 bestehen (Fig.4) . Dieser Mindestabstand ist derart zu wählen, daß bei Drehung des Mitnehmers 20 die Steuernocken 33, 34 der Sperrglieder 31, 32 aufgrund der keilförmigen Flächen 44 bis 47 so weit in Richtung der Sperrgliedfedern 101 gedrückt werden, daß die Rastelemente 18, 19 nicht mehr durch die Steuernocken 33, 34 blockiert werden.In order to ensure safe loosening of the rotatable switching piece 11, it is necessary that after blocking of the lug-shaped locking elements 18, 19 still has a certain free-wheeling action due to the locking surfaces 42, 43 of the control cams 33, 34 of the drivers 20, that is to say the locking elements 18, 19 do not therefore exist between the stop surfaces 26, 28 of the driver 20 and the locking surfaces 42 43 of the control cams 33, 34 are clamped. Rather, there must be a corresponding minimum distance between the stop surfaces 26, 28 and the corresponding latching elements 18, 19 in the securing position (FIG. 4). This minimum distance is to be selected such that when the driver 20 rotates, the control cams 33, 34 of the locking members 31, 32 are pressed so far in the direction of the locking member springs 101 due to the wedge-shaped surfaces 44 to 47 that the locking elements 18, 19 are no longer through Control cams 33, 34 are blocked.
Damit der Aufprall der Rastelemente 18, 19 auf den Anschlagsflächen 26, 28 bei der elektrodynamischen Drehung des drehbaren Schaltstückes 11 nicht zu hart ist und dieses unter Umständen beschädigt, hat es sich als vorteilhaft erwiesen, daß die Anschlagsflächen aus einem dämpfenden Material, z.B. aus Kunststoff, Gummi oder einem energieverzehrenden Metallschaum, bestehen. Eine weitere vorteilhafte Alternative besteht darin, die Gehäuseteile 2, 3 derart auszubilden, daß die Anschlagsflächen in den Gehäuseteilen liegen.So that the impact of the latching elements 18, 19 on the stop surfaces 26, 28 during the electrodynamic rotation of the rotatable switching element 11 is not too hard and may damage it, it has proven to be advantageous for the stop surfaces to be made of a damping material, e.g. made of plastic, rubber or an energy-consuming metal foam. Another advantageous alternative is to design the housing parts 2, 3 in such a way that the stop faces lie in the housing parts.
Die Erfindung ist selbstverständlich nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. So läßt sich die Erfindung beispielsweise anstatt mit zwei axial verschiebbaren Sperrgliedern auch nur mit einem Sperrglied realisieren, sofern die Sperrfläche an dem Steuernocken entsprechend breit gewählt wird. Anstatt eine der beiden Seitenflächen des Steuernockens als Sperrfläche auszubilden, kann der Steuernocken auch mit einer Ausnehmung versehen sein, die sich in der jeweiligen Frontfläche der Steuernocken befindet, so daß nach einem vorgebbaren Schwenkweg des drehbaren Schaltstückes das Rastelement in diese Ausnehmung gedrückt wird. The invention is of course not limited to the embodiment described above. For example, instead of using two axially displaceable locking members, the invention can also be implemented with only one locking member, provided the locking surface on the control cam is chosen to be correspondingly wide. Instead of forming one of the two side surfaces of the control cam as a locking surface, the control cam can also be provided with a recess which is located in the respective front surface of the control cam, so that the latching element is pressed into this recess after a predeterminable pivoting path of the rotatable switching element.

Claims

A n s p r ü c h e Expectations
1. Strombegrenzender Leistungsschalter mit einer in einem Schaltkammergehäuse angeordneten Kontaktanordnung, die mindestens zwei feste Schaltstücke (8, 9) umfaßt, und mit mindestens einem zweiarmigen, um eine Achse (10) drehbaren Schaltstück (11) , welches in seiner geschlossenen Grundstellung die beiden festen Schaltstücke (8, 9) miteinander verbindet, wobei die festen Schaltstücke (8, 9) derart ausgestaltet sind, daß sich bei einem Überlastfall zwischen ihnen und dem stromdurchflossenen drehbaren Schaltstück (11) elektrodynamische Kräfte ergeben, die das drehbare Schaltstück (11) gegen den Druck mindestens einer Kontaktfeder (100) aus seiner geschlossenen Stellung in eine geöffnete Sicherungsstellung verschwenken, wobei an dem drehbaren Schaltstück (11) mindestens ein Rastelement (18, 19) angeordnet ist, welches sich bei einem Verschwenken des Schaltstückes (11) von der Grundstellung in die Sicherungsstellung mitbewegt und in dieser Stellung von mindestens einem federbeaufschlagten Sperrglied (31, 32) an dem Zurückschwenken in die Grundstellung gehindert wird, dadurch gekennzeichnet, daß in der Sicherungsstellung das drehtest in dem Schaltkammergehäuse angeordnete mindestens eine Sperrglied (31, 32) an dem nasenförmig ausgebildeten mindestens einem Rastelement (18, 19) in Richtung der Achse (10) verschieblich angreift.1. Current-limiting circuit breaker with a contact arrangement arranged in a switching chamber housing, which comprises at least two fixed switching elements (8, 9), and with at least one two-armed, about an axis (10) rotatable switching element (11), which in its closed basic position the two fixed Switch pieces (8, 9) connects to one another, the fixed contact pieces (8, 9) being designed in such a way that, in the event of an overload between them and the current-carrying rotating contact piece (11), electrodynamic forces result which the rotatable contact piece (11) against Swivel the pressure of at least one contact spring (100) from its closed position into an open securing position, with at least one latching element (18, 19) being arranged on the rotatable switching element (11), which engages when the switching element (11) swivels from the basic position moved the securing position and in this position by at least one spring Impacted locking member (31, 32) is prevented from pivoting back into the basic position, characterized in that in the securing position, the at least one locking member (31, 32) arranged in the switching chamber housing on the nose-shaped at least one locking element (18, 19) in Slidably engages direction of the axis (10).
2. Leistungsschalter nach Anspruch 1, dadurch gekenn- zeichnet, daß an dem Sperrglied (31, 32) ein Steuernocken2. Circuit breaker according to claim 1, characterized in that a control cam on the blocking member (31, 32)
(33, 34) angeordnet ist, dessen dem Rastelement (18, 19) zugewandte Seite als Sperrfläche (42, 43) ausgebildet ist, die das in der Sicherungsstellung befindliche drehbare Schaltstück (11) in dieser Lage fixiert. (33, 34) is arranged, the side of which facing the latching element (18, 19) is designed as a blocking surface (42, 43) which fixes the rotatable switching element (11) in the securing position in this position.
3. Leistungsschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein um die Achse (10) verschwenkbarer Mitnehmer (20) vorgesehen ist, welcher mindestens eine spaltformige Ausnehmung (24) aufweist, entlang welcher das nasenformige Rastelement (18, 19) in Umfangsrichtung verschwenkbar ist.3. Circuit breaker according to claim 1 or 2, characterized in that a pivotable about the axis (10) driver (20) is provided which has at least one gap-shaped recess (24) along which the nose-shaped latching element (18, 19) in the circumferential direction is pivotable.
4. Leistungsεchalter nach Anspruch 3, dadurch gekennzeichnet, daß - in Umfangsrichtung gesehen - die spalt- formige Ausnehmung (24) an ihrem einen Ende eine Anschlagsflache (26, 28) aufweist, die derart gewählt ist, daß sie bei der Schwenkbewegung des drehbaren Schaltstuckes (11) von dem nasenförmigen Rastelement (18, 19) erst nach Erreichen der Sicherungsstellung des dreh- baren Schaltstuckes (11) erreicht wird.4. Circuit breaker according to claim 3, characterized in that - seen in the circumferential direction - the gap-shaped recess (24) has at one end a stop surface (26, 28) which is selected such that it is in the pivoting movement of the rotatable switching piece (11) of the nose-shaped latching element (18, 19) is only reached after the securing position of the rotatable switching piece (11) has been reached.
5. Leistungsschalter nach Anspruch 3, dadurch gekennzeichnet, daß die Gehauseteile (2, 3) derart ausgebildet sind, daß die Anschlagsflachen (26, 28) der nasenförmigen Rastelemente (18, 19) in den Gehauseteilen (2, 3) liegen.5. Circuit breaker according to claim 3, characterized in that the housing parts (2, 3) are designed such that the stop faces (26, 28) of the nose-shaped latching elements (18, 19) lie in the housing parts (2, 3).
6. Leistungsschalter nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Anschlagsflache (26, 28) aus einem dampfenden Material besteht.6. Circuit breaker according to claim 4 or 5, characterized in that the stop surface (26, 28) consists of a steaming material.
7. Leistungsschalter nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß auf der dem Rastelement (18, 19) abgewandten Seite des Mitnehmers (20) ein Fuhrungs- zapfen (21) vorgesehen ist, auf welchem das Sperrglied7. Circuit breaker according to one of claims 3 to 6, characterized in that on the side of the driver (20) facing away from the latching element (18, 19) a guide pin (21) is provided, on which the locking member
(31, 32) langsverschiebbar angeordnet ist.(31, 32) is arranged to be slowly displaceable.
8. Leistungsschalter nach einem der Ansprüche 3 bis 7 , dadurch gekennzeichnet, daß das - in Umfangsrichtung gesehen - andere Ende der spaltförmigen Ausnehmung (24) eine Mitnehmerflache (25, 27) für das drehbare Schalt- stuck (11) in seiner Grundstellung bildet, und daß bei einer Drehung des Mitnehmers (20) das drehbare Schaltstuck (11) von der Mitnehmerfläche (25, 27) gegen den Druck der Kontaktfeder (100) in seine Sicherungsstellung verschwenkbar ist.8. Circuit breaker according to one of claims 3 to 7, characterized in that - seen in the circumferential direction - the other end of the gap-shaped recess (24) has a driving surface (25, 27) for the rotatable switching Stuck (11) forms in its basic position, and that when the driver (20) rotates, the rotatable switching piece (11) can be pivoted from the driver surface (25, 27) against the pressure of the contact spring (100) into its securing position.
9. Leistungsschalter nach einem der Ansprüche 3 bis 8 , dadurch gekennzeichnet, daß die Berührungsflächen (44 bis 47) des Mitnehmers (20) und des Sperrgliedes (31, 32) mindestens in einem Teilbereich derart keilförmig ausgebildet sind, daß bei in seiner Sicherungsstellung befindlichem drehbaren Schaltstuck (11) bei einer Drehung des Mitnehmers (20) eine axiale Verschiebung des Sperrgliedes (31, 32) gegen die Ruckstellkraft einer Druckfeder (101) erfolgt, so daß das Rastelement (18, 19) von dem Sperrglied (31, 32) freigegeben wird und das drehbare Schaltstück (11) durch die Kontaktfeder (100) in seine Grundstellung verschwenkt wird.9. Circuit breaker according to one of claims 3 to 8, characterized in that the contact surfaces (44 to 47) of the driver (20) and the locking member (31, 32) are wedge-shaped at least in a partial area such that when in its securing position rotatable switching piece (11) upon rotation of the driver (20) an axial displacement of the locking member (31, 32) against the restoring force of a compression spring (101), so that the locking element (18, 19) from the locking member (31, 32) is released and the rotatable contact piece (11) is pivoted into its basic position by the contact spring (100).
10. Leistungsschalter nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß an dem drehbaren Schaltstuck (11) zwei um 180° versetzt angeordnete nasenformige Rastelemente (18, 19) angeordnet sind.10. Circuit breaker according to one of claims 1 to 9, characterized in that on the rotatable switching piece (11) two nose-shaped latching elements (18, 19) are arranged offset by 180 °.
11. Leistungsschalter nach einem der Ansprüche l bis 10, dadurch gekennzeichnet, daß zwei in axialer Richtung verschiebbare federbeaufschlagte Sperrglieder (31, 32) vorgesehen sind, die axial vor und hinter dem drehbaren Schaltstück (11) angeordnet sind und deren jeweilige Sperrflachen (42, 43) zusammen eine Flache ergeben, die das Zuruckschwenken des drehbaren Schaltstuckes (11) in seine Grundstellung verhindert. 11. Circuit breaker according to one of claims l to 10, characterized in that two axially displaceable spring-loaded locking elements (31, 32) are provided, which are arranged axially in front of and behind the rotatable switching element (11) and their respective locking surfaces (42, 43) together result in a surface that prevents the pivoting switching piece (11) from pivoting back into its basic position.
PCT/EP1997/003621 1996-07-27 1997-07-09 Current-limiting power circuit-breaker WO1998005053A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59709980T DE59709980D1 (en) 1996-07-27 1997-07-09 CURRENT CIRCUIT BREAKER
EP97932787A EP0916151B1 (en) 1996-07-27 1997-07-09 Current-limiting circuit-breaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19630470A DE19630470C1 (en) 1996-07-27 1996-07-27 Current-limiting circuit-breaker switch with two lugs on centrally pivoted lever
DE19630470.9 1996-07-27

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WO1998005053A1 true WO1998005053A1 (en) 1998-02-05

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EP (1) EP0916151B1 (en)
DE (2) DE19630470C1 (en)
WO (1) WO1998005053A1 (en)

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DE102007011451A1 (en) * 2007-03-06 2008-09-11 Siemens Ag Contact lever movement device and electrical switch and method for producing the contact lever movement device
DE102008039066A1 (en) * 2008-08-21 2010-02-25 Siemens Aktiengesellschaft Circuit-breaker for interrupting current flow, has press element arranged at bridging element for pressing surface of bridging element against component or housing in deflecting position, where housing comprises two contacts
DE102008047247A1 (en) * 2008-09-10 2010-04-15 Siemens Aktiengesellschaft Contact system for power switching device, has locking device and contact element, which are arranged such that spring force is transferred from contact element for fixing or releasing contact element by locking device
DE102008056493A1 (en) * 2008-11-06 2010-05-12 Siemens Aktiengesellschaft Actuation device for actuating e.g. auxiliary switch of three pole switchgear, has actuation bridges for converting rotary movement of switchgear selector shaft into stroke actuation movement of auxiliary switch and/or auxiliary release
DE102010014428A1 (en) * 2010-04-01 2011-10-06 Siemens Aktiengesellschaft Multipole electrical switching device comprises two switching poles, a drive mechanism and a switching shaft, which is capable of rotating under the effect of the drive mechanism about an axis of rotation formed by pivot bearings
CN113012964A (en) * 2021-03-01 2021-06-22 国网山东省电力公司齐河县供电公司 Anticreeping device for electrical equipment

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DE19630470C1 (en) 1997-08-28
EP0916151A1 (en) 1999-05-19
DE59709980D1 (en) 2003-06-05
EP0916151B1 (en) 2003-05-02

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