EP3105771B1 - Thermal overcurrent circuit breaker - Google Patents

Thermal overcurrent circuit breaker Download PDF

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Publication number
EP3105771B1
EP3105771B1 EP15701468.9A EP15701468A EP3105771B1 EP 3105771 B1 EP3105771 B1 EP 3105771B1 EP 15701468 A EP15701468 A EP 15701468A EP 3105771 B1 EP3105771 B1 EP 3105771B1
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EP
European Patent Office
Prior art keywords
spring
attachment
chamber
circuit breaker
limb
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EP15701468.9A
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German (de)
French (fr)
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EP3105771A1 (en
Inventor
Erich Fischer
Wolfgang Schmidt
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Ellenberger and Poensgen GmbH
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Ellenberger and Poensgen GmbH
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Priority to PL15701468T priority Critical patent/PL3105771T3/en
Publication of EP3105771A1 publication Critical patent/EP3105771A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/48275—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end with an opening in the housing for insertion of a release tool
    • 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
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • 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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H01H73/26—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by tumbler
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4828—Spring-activating arrangements mounted on or integrally formed with the spring housing
    • H01R4/48365—Spring-activating arrangements mounted on or integrally formed with the spring housing with integral release means

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  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)

Description

Die Erfindung betrifft einen thermischen Überstromschutzschalter mit einem Schaltergehäuse, in dem ein thermisches Dehnelement, insbesondere ein Bimetall, und ein mit diesem gekoppelter, manuell betätigbarer Sprungschaltmechanismus sowie ein mit diesem zusammenwirkender Bewegkontakt und ein Festkontakt angeordnet sind, der mit einer ersten Anschlussschiene verbunden ist, während der Bewegkontakt über das thermische Dehnelement mit einer zweiten Anschlussschiene kontaktiert ist.The invention relates to a thermal overcurrent circuit breaker with a switch housing, in which a thermal expansion element, in particular a bimetal, and a coupled thereto, manually operable snap-action mechanism and a cooperating with this Bewegkontakt and a fixed contact are arranged, which is connected to a first connection rail while the moving contact via the thermal expansion element is contacted with a second connecting rail.

Bei einem thermischen Schutzschalter ist der Auslösezeitpunkt abhängig von der Höhe des Überstroms. Mit zunehmender Stromstärke wird ein Dehnelement, insbesondere ein Bimetall, bis zu einem definierten Auslösepunkt zunehmend erwärmt. Das thermische Dehnelement ist mit einem beispielsweise zur Freiauslösung manuelle betätigbaren Sprungmechanismus gekoppelt, der mit einem Bewegkontakt eines Kontaktpaars zusammenwirkt. Ein solcher, auch als Überstromschutzschalter bezeichneter Schutzschalter mit thermischer Auslösung dient üblicherweise zum Schutz von Verbrauchern wie beispielsweise Elektromotoren, Haushalts- und Büromaschinen, elektrischen Werkzeugen, Netzgeräten und Niederspannungsleitungen gegen Überstrom. Derartige Schutzschalter können einpolig, zweipolig oder dreipolig ausgeführt sein und werden für Nennspannungen von AC (Wechselstrom) 240V oder DC (Gleichstrom) 50V bei Nennströmen im Bereich zwischen 0,1A und 20A eingesetzt.For a thermal breaker, the trip time depends on the amount of overcurrent. As the current strength increases, an expansion element, in particular a bimetal, is increasingly heated up to a defined trigger point. The thermal expansion element is coupled to a manual release mechanism that can be actuated, for example, for release release, which interacts with a moving contact of a contact pair. Such, also known as overcurrent protection circuit breaker with thermal tripping is usually used to protect consumers such as electric motors, household and office machines, electrical tools, power supplies and low-voltage lines against overcurrent. Such circuit breakers can be single-pole, double-pole or three-pole and are used for nominal voltages of AC (alternating current) 240V or DC (direct current) 50V at rated currents in the range between 0.1A and 20A.

Ein thermische Überstromschutzschalter der genannten Art ist beispielsweise aus der DE 27 21 162 A1 und aus der DE 94 22 029 U1 bekannt. Bei den bekannten Schutzschaltern sind die Anschlüsse zum Kontaktpaar, d. h. an den Festkontakt und über ein Bimetall an den von einer Kontaktfeder getragenen Bewegkontakt als sogenannte Flachstecker ausgeführt, die aus dem Schaltergehäuse an einer einer EIN-/AUS-Schaltwippe gegenüberliegenden Anschlussseite herausgeführt. Der Anschluss von Leitungen erfolgt über Flachsteckerbuchsen oder mittels mit den Flachsteckern verschraubbaren Kabelschuhen.A thermal overcurrent circuit breaker of the type mentioned is for example from the DE 27 21 162 A1 and from the DE 94 22 029 U1 known. In the known circuit breakers, the connections to the pair of contacts, that is performed on the fixed contact and a bimetal on the carried by a contact spring moving contact as a so-called tab, which led out of the switch housing on a connection side opposite to an ON / OFF rocker switch. The connection of cables is made via flat connector sockets or by means of cable lugs that can be screwed with the flat connectors.

Weiterhin ist aus der EP 2 568 539 A2 eine schraubenlose Klemmanschlussstelle für einen Schaltgerät bekannt. Der Erfindung liegt die Aufgabe zugrunde, einen insbesondere hinsichtlich Berührungsschutz, einfacher Anschlussmontage sowie Kontakt- und Anschlusssicherheit verbesserten thermischen Schutzschalter der genannten Art anzugeben. Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1. Vorteilhafte Ausgestaltungen und Weiterbildungen sind Gegenstand der Unteransprüche.Furthermore, from the EP 2 568 539 A2 a screwless terminal connection for a switching device known. The invention has for its object to provide an improved in particular with respect to protection against contact, easy connection assembly and contact and connection safety thermal circuit breaker of the type mentioned. This object is achieved by the features of claim 1. Advantageous embodiments and further developments are the subject of the dependent claims.

Hierzu weist der thermische Überstromschutzschalter ein Schaltergehäuse mit einer Anzahl von Anschlusskammern auf, in denen jeweils eine Anschlussschienen und ein zweischenkliges Federelement zur Klemmkontaktierung einer über eine Gehäuseöffnung in die jeweilige Anschlusskammer geführten Anschlussleitung mit der dortigen Anschlussschiene angeordnet sind. Vorzugsweise jedes Federelement weist einen ersten Federschenkel und einen zu diesem in einem Winkel verlaufenden zweiten Federschenkel auf. In die jeweilige Anschlusskammer mündet eine zweite Gehäuseöffnung ein, die vom zweiten Federschenkel des Federelements in dessen Anlageposition überdeckte und zur Schwenkbetätigung dieses Federschenkels vorgesehen ist.For this purpose, the thermal overcurrent circuit breaker on a switch housing with a number of connection chambers, in each of which a connecting rails and a zweischenkliges spring element for Klemmkontaktierung a guided via a housing opening in the respective connection chamber connecting cable with the local connection rail are arranged. Preferably, each spring element has a first spring leg and a second spring leg extending at an angle thereto. In the respective connection chamber opens a second housing opening, which is covered by the second spring leg of the spring element in its abutment position and is provided for pivoting operation of this spring leg.

Das Schaltergehäuse umfasst zudem vorzugsweise eine sich zwischen einer Bedienseite für ein manuell betätigbares Schaltelement und den Anschlusskammern erstreckende Kontaktkammer, in welcher der Sprungschaltmechanismus und das thermische Dehnelement sowie das Kontaktpaar aus Beweg- und Festkontakt angeordnet sind.The switch housing also preferably comprises a contact chamber extending between an operating side for a manually operable switching element and the connection chambers, in which the snap-action mechanism and the thermal expansion element and the contact pair of moving and fixed contact are arranged.

Der ersten Federschenkel stützt sich an einem ersten Schienen- oder Anschlussschenkel der Anschlussschiene kontaktierend ab. Der Winkel zwischen den beiden Federschenkeln des Federelements ist vorzugsweise größer als 45°, besonders bevorzugt größer als 60°, und kleiner als 180°, insbesondere kleiner oder gleich 90°. Der zweiten Federschenkel ist innerhalb der Anschlusskammer aus einer vorzugsweise sowohl die zweite Gehäuseöffnung als auch die erste Gehäuseöffnung zumindest teilweise überdeckenden Anlageposition an einer Kammerkontur gegen die Federkraft in eine zum ersten Federschenkel gerichtete Schwenkposition zur Klemmkontaktierung des in die Anschlusskammer geführten Anschlussleiters verbringbar.The first spring leg is supported on a first rail or connecting leg of the connecting rail from contacting. The angle between the two spring legs of the spring element is preferably greater than 45 °, more preferably greater than 60 °, and less than 180 °, in particular less than or equal to 90 °. The second spring leg is within the connection chamber a preferably both the second housing opening and the first housing opening at least partially overlapping bearing position on a chamber contour against the spring force in a direction of the first spring leg pivot position for Klemmkontaktierung guided in the connection chamber terminal conductor can be brought.

Ein besonders zweckmäßige Ausgestaltung des oder jedes Federelementes sieht vor, dass dessen beiden Federschenkeln über einen Zwischenschenkel verbunden sind, mit dem das Federelement an einer Gehäusekontur innerhalb der Anschlusskammer anliegt. Der Zwischenschenkel ist geeigneterweise nach Art einer offenen Schlinge geformt. Die an die Schlingenform angepasst Gehäusekontur innerhalb der jeweiligen Anschlusskammer erstreckt sich vorzugsweise beidseitig des Zwischenschenkels unter Bildung einer Anlagekontur für die Schiingenaußenseite des Federelementes und einer Stützkontur, die vom sich zu den Federschenkeln hin öffnenden schlingenförmigen Zwischenschenkel umschlossen ist.A particularly advantageous embodiment of the or each spring element provides that the two spring legs are connected via an intermediate leg, with which the spring element bears against a housing contour within the connection chamber. The intermediate leg is suitably shaped in the manner of an open loop. The adapted to the loop shape housing contour within the respective connection chamber preferably extends on both sides of the intermediate leg to form a contact contour for the Schiingenaußenseite the spring element and a support contour, which is enclosed by the spring legs towards opening loop-shaped intermediate leg.

Eine weitere Ausgestaltung sieht U-förmige Anschlussschienen vor, die mit beiden U-Anschlussschenkeln oder mit zumindest einem der beiden U-Anschlussschenkel und dem diese verbindenden Mittelschenkel an einer Kammerwand der Anschlusskammer anliegt.A further embodiment provides U-shaped connecting rails which abuts against a chamber wall of the connection chamber with both U-connection legs or with at least one of the two U-connection legs and the center leg connecting them.

Zum besonders einfachen Lösen der Klemmkontaktierung einer angeschlossenen Anschlussleitung mündet in die oder jede Anschlusskammer eine zur ersten Gehäuseöffnung parallele zweite Gehäuseöffnung ein, die ebenfalls vom zweiten Federschenkel in dessen Anlageposition überdeckte ist. Zwar kann grundsätzlich mittels eines in die zweite Gehäuseöffnung direkt eingeführten Werkzeugs der zweiten Federschenkel verschwenkt werden. Vorteilhafterweise ist jedoch in der zweiten Gehäuseöffnung eine Betätigungshülse zum indirekten Verschwenken des zweiten Federschenkels mittels eines Werkzeugs angeordnet, so dass die Klemmkontaktierung besonders einfach, zuverlässig sowie zerstörungsfrei gelöst und die Anschlussleitung gezogen werden.For particularly simple release of the Klemmkontaktierung a connected connection line opens into the or each connection chamber parallel to the first housing opening a second housing opening, which is also covered by the second spring leg in its abutment position. Although in principle can be pivoted by means of a directly introduced into the second housing opening tool of the second spring leg. Advantageously, however, an actuating sleeve for indirect pivoting of the second spring leg by means of a tool is arranged in the second housing opening, so that the Klemmkontaktierung particularly simple, reliable and non-destructive solved and pulled the connecting cable.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigen:

Fig. 1
in einer Seitenansicht einen thermischen Überlastschutzschalter mit Blick in drei Anschlusskammern eines teilweise geöffneten Schaltergehäuses, und
Fig. 2 und 3
den thermischen Überlastschutzschalter in zwei verschiedenen perspektivischen Explosionsdarstellungen.
An embodiment of the invention will be explained in more detail with reference to a drawing. Show:
Fig. 1
in a side view of a thermal overload protection switch with a view into three connection chambers of a partially open switch housing, and
FIGS. 2 and 3
the thermal overload protection switch in two different perspective exploded views.

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.

Die Figuren 1 bis 3 zeigen einen thermischen Überstromschutzschalter 1 mit einem Schaltergehäuse 2, in dem im Ausführungsbeispiel drei Anschlusskammern 3, 4, 5 nebeneinander angeordnet sind. In jeder Anschlusskammer 3, 4, 5 ist ein zweischenkliges Federelement 6 angeordnet. In jeder Anschlusskammer 3, 4, 5 ist des Weiteren eine Anschlussschiene 7 angeordnet, die jeweils U-förmig ausgebildet ist. Die U-Form der jeweiligen Anschlussschiene 7 ist durch einen in der in Figur 1 gekennzeichneten Gehäuselängsrichtung 8 verlaufenden ersten Schienenschenkel 7a und einen hierzu beabstandeten, parallelen Schienenschenkel 7b sowie einen verbindenden Mittelschenkel 7c gebildet. Mit diesen Schienenschenkeln 7a bis 7c liegen die jeweiligen Anschlussschienen 7 an Kammeraußenwänden 9 oder Kammerzwischenwänden 10 an. Aus Gründen der Übersichtlichkeit sind die gleichartigen Schienenschenkel der Anschlussschienen 7 in den beiden anderen Anschlusskammern 4 bzw. 5 nicht näher bezeichnet.The FIGS. 1 to 3 show a thermal overload protection switch 1 with a switch housing 2, in the embodiment, three connection chambers 3, 4, 5 are arranged side by side. In each connection chamber 3, 4, 5 a two-legged spring element 6 is arranged. In each connection chamber 3, 4, 5, a connecting rail 7 is further arranged, which is in each case U-shaped. The U-shape of the respective connection rail 7 is characterized by a in the in FIG. 1 characterized housing longitudinal direction 8 extending first rail leg 7a and a spaced therefrom, parallel rail leg 7b and a connecting center leg 7c formed. With these rail legs 7a to 7c, the respective connecting rails 7 abut against chamber outer walls 9 or chamber intermediate walls 10. For reasons of clarity, the similar rail legs of the connecting rails 7 in the other two connection chambers 4 and 5 are not designated in any more detail.

In den Anschlusskammern 3 bis 5 sitzen die gleichartigen, zweischenklige Federelemente 6 ein, die hinsichtlich der nachfolgenden Details wiederum aus Gründen der Übersichtlichkeit gleichermaßen oder nicht einzeln bezeichnet sind. Mit einem in Gehäuselängsrichtung 8 orientierten ersten Federschenkel 6a, der nachfolgend auch als Kontaktschenkel bezeichnet wird, liegt das jeweilige Federelement 6 am Schienenschenkel 7a der entsprechenden Anschlussschiene 7 kontaktierend an. Der nachfolgend auch als Klemmschenkel bezeichnete zweite Federschenkel 6b des jeweiligen Federelements 6 ist in der zur Gehäuselängsrichtung 8 senkrechten Gehäusequerrichtung 11 orientiert und überdeckt dort eine erste Gehäuseöffnung 12. Der jeweilige Klemmschenkel 6b des Federelementes 6 überdeckt zudem eine zur genannten ersten Gehäuseöffnung 12 parallele zweite Gehäuseöffnung 13 (Fig. 2). In dieser sitzt eine einseitig geschlossene Betätigungshülse 14 ein, die endseitig in die jeweilige Anschlusskammer 3, 4, 5 hineinragt und dort am Klemmschenkel 6b des jeweiligen Federelementes 6 anliegt. Ebenfalls aus Gründen der Übersichtlichkeit sind die gleichartigen zweiten Gehäuseöffnungen der anderen Anschlusskammern 3 und 4 wiederum nicht näher bezeichnet.In the connection chambers 3 to 5 sit the same, two-legged spring elements 6, which are again referred to with regard to the following details for reasons of clarity alike or not individually. With a oriented in the housing longitudinal direction 8 first spring leg 6a, which is also referred to below as a contact leg, the respective spring element 6 is on the rail leg 7a of the corresponding terminal rail 7 contacting. The second spring leg 6b of the respective spring element 6, which is also referred to below as the clamping leg, is oriented in the housing transverse direction 11 perpendicular to the housing longitudinal direction 8 and covers a first housing opening 12. The respective clamping leg 6b of the spring element 6 also covers a second housing opening 13 parallel to the first housing opening 12 mentioned ( Fig. 2 ). In this sits a one-sided closed actuating sleeve 14, which protrudes into the end of the respective connection chamber 3, 4, 5 and abuts there against the clamping leg 6b of the respective spring element 6. Also for reasons of clarity, the similar second housing openings of the other connection chambers 3 and 4 are in turn not specified.

Die jeweilige Betätigungshülse 14 ist in der zugeordneten Gehäuseöffnung 13 in Gehäuselängsrichtung 8 zumindest geringfügig verschiebbar. Eine angeformte Rastnase 15 hinterschneidet im Montagezustand der Betätigungshülse 14 eine Randkontur 16 der jeweiligen Gehäuseöffnung 13 innerhalb der entsprechenden Anschlusskammer 3, 4, 5. Hierdurch ist die Betätigungshülse 14, die am gegenüberliegenden Einführende für ein Werkzeug eine Stützkontur 17 (Fig. 2) aufweist, innerhalb der entsprechenden Gehäuseöffnung 13 gesichert.The respective actuating sleeve 14 is at least slightly displaceable in the associated housing opening 13 in the housing longitudinal direction 8. An integrally formed locking lug 15 undercuts in the assembled state of the actuating sleeve 14 an edge contour 16 of the respective housing opening 13 within the corresponding connection chamber 3, 4, 5. In this way, the actuating sleeve 14, at the opposite insertion end for a tool a support contour 17 (FIG. Fig. 2 ), secured within the corresponding housing opening 13.

Wie in den Figuren anhand der dort rechten Anschlusskammer 5 veranschaulicht ist, erfolgt mittels der Federelemente 6 eine Klemmkontaktierung eines über die erste Gehäuseöffnung 12 in jeweilige die Anschlusskammer 3, 4, 5 eingesteckten Anschlussleitung 18 mit der jeweiligen Anschlussschiene 7 und dort mit dessen jeweiligen zweiten Schienenschenkel 7b. In Folge der Gestaltung, Anordnung und Federkraft des Federelementes 6 ist die Klemmkontaktierung selbstsichernd. Mit anderen Worten kann in Einsteckrichtung der jeweilige Klemmschenkel 6b mittels der Anschlussleitung 18 bzw. deren abisolierten Leiterende 19 in Gehäuselängsrichtung 8 und dabei in Richtung auf den Kontaktschenkel 6a unter Reduzierung des zwischen diesen Federschenkel 6a und 6b bestehenden Winkels α (Fig. 3) federelastisch verschwenkt werden. Eine Zugbelastung an der jeweiligen Anschlussleitung 18 in entgegen der Einsteckrichtung bewirkt hingegen mit zunehmender Zugkraft eine Verstärkung der Klemmwirkung.As is illustrated in the figures with reference to the connection chamber 5 there on the right, by means of the spring elements 6, a terminal contacting of a connection line 18 inserted into the connection chamber 3, 4, 5 via the first housing opening 12 with the respective connection rail 7 and there with its respective second rail leg 7b. As a result of the design, arrangement and spring force of the spring element 6, the terminal contact is self-locking. In other words, in the insertion direction of the respective clamping leg 6b by means of the connecting line 18 and its stripped conductor end 19 in the housing longitudinal direction 8 and thereby in the direction of the contact leg 6a while reducing the existing between these spring legs 6a and 6b angle α ( Fig. 3 ) are pivoted resiliently. A tensile load on the respective connecting line 18 in the opposite direction of insertion, however, causes an increase in the clamping effect with increasing tensile force.

Das Federelement 6 ist in der jeweiligen Anschlusskammer 3, 4, 5 positionsgenau gelagert. Hierzu ist im Bereich eines die beiden Federschenkel 6a und 6b verbindenden, nach Art einer offenen Schlinge geformten Zwischenschenkels 6c des Federelements 6 in der Anschlusskammer 3, 4, 5 eine Anlagekontur 20 und eine Stützkontur 21 gebildet, zwischen denen der Zwischenschenkel 6c des Federelements 6 einsitzt.The spring element 6 is mounted in exact position in the respective connection chamber 3, 4, 5. For this purpose, in the region of an intermediate leg 6c of the spring element 6 connecting the two spring legs 6a and 6b in the connection chamber 3, 4, 5, a contact contour 20 and a support contour 21 are formed, between which the intermediate leg 6c of the spring element 6 is seated ,

Wie aus den Figuren 2 und 3 vergleichsweise deutlich ersichtlich ist, ist das Schaltergehäuse 2 mehrteilig. Es weist einen Gehäusegrundkörper 2a und eine Gehäusekappe 2b sowie zwei Gehäusedeckel 2c auf. Im Gehäusegrundkörper 2a befinden sich die Anschlusskammern 3 bis 5, in welche die in einen Gehäuseboden 2d eingebrachten Gehäuseöffnungen 12, 13 einmünden. Aus Fig. 2 ersichtlich ist der Überstromschutzschalter 1 2-polig ausgeführt, so dass die Anschlusskammern 3 bis 5 und die darin einmündenden Gehäuseöffnungen 12, 13 sowie die Anschlussschienen 7 und Federelemente 6 entsprechend mehrfach vorhanden sind.Like from the Figures 2 and 3 is comparatively clear, the switch housing 2 is a multi-part. It has a housing base 2a and a housing cap 2b and two housing cover 2c. In the housing base 2a are the connection chambers 3 to 5, in which the housing openings introduced into a housing base 2d 12, 13 open. Out Fig. 2 it can be seen that the overcurrent protection switch 1 2-pole executed, so that the connection chambers 3 to 5 and the therein opening housing openings 12, 13 and the connecting rails 7 and spring elements 6 are correspondingly multiple.

In Gehäuselängsrichtung 8 gesehen zwischen den Anschlusskammern 3 bis 5 und einer Bedienseite 2e des Schaltergehäuses 2 befindet sich eine Kontaktkammer 22 (Fig. 3), in der ein Sprungschaltmechanismus angeordnet ist, der mit einer Schaltwippe 23 an der Bedienseite 2e zusammen wirkt. Die Gehäusekappe 2b deckt im Montagezustand den Gehäusegrundkörper 2a im Bereich der Kontaktkammer 22 ab. Dabei ragt die Schaltwippe 23 über eine Kappenöffnung 24 der Gehäusekappe 2b aus dem Schaltergehäuse 2 zumindest teilweise heraus, um manuell zum Zweck einer Freiauslösung betätigt werden zu können. Die beiden Gehäusedeckel 2c sind vorzugsweise mit dem Gehäusegrundkörper 2a verrastbar und decken die beidseitig des Gehäusegrundkörpers 2a in diesen vorgesehen Anschlusskammern 3 bis 5 ab.Seen in the housing longitudinal direction 8 between the connection chambers 3 to 5 and an operating side 2e of the switch housing 2 is a contact chamber 22 (FIG. Fig. 3 ), in which a snap-action mechanism is arranged, which cooperates with a switching rocker 23 on the operating side 2 e. In the assembled state, the housing cap 2b covers the housing base body 2a in the area of the contact chamber 22. In this case, the switching rocker 23 protrudes at least partially out of the switch housing 2 via a cap opening 24 of the housing cap 2b in order to be able to be manually operated for the purpose of a free release. The two housing cover 2c are preferably latched to the housing base 2a and cover the both sides of the housing base 2a provided in these connection chambers 3 to 5 from.

Der Sprungschaltmechanismus umfasst einen mit der Schaltwippe 23 gekoppelten Verklinkungshebel 25, der mit einer Kontaktfeder 26 zusammen wirkt, die freiendseitig einen Bewegkontakt 27 trägt. Diesem gegenüberliegenden befindet sich ein Festkontakt 28, der mit dem Bewegkontakt 27 ein Kontaktpaar bildet. Mit dem Verklinkungshebel 25 ist ein Auslösehebel 29 gekoppelt, der seinerseits mit einem thermischen Dehnelement 30 in Form eines U-förmigen Bimetalls zusammenwirkt. Das Bimetall 30 ist über dessen beiden U-Schenkel den beiden Anschlussschienen 7 in den Anschlusskammern 3 und 4 verbunden. Die Anschlussschiene 7 der Anschlusskammer 3 ist ihrerseits mit der Kontaktfeder 26 und über diese mit dem Bewegkontakt 27 elektrisch leitend verbunden.The snap-action mechanism comprises a latching lever 25, which is coupled to the switching rocker 23 and interacts with a contact spring 26 which carries a moving contact 27 on the free end side. This opposite is a fixed contact 28 which forms a contact pair with the moving contact 27. With the Verklinkungshebel 25 is a release lever 29 is coupled, which in turn cooperates with a thermal expansion element 30 in the form of a U-shaped bimetal. The bimetal 30 is connected via the two U-legs of the two connecting rails 7 in the connection chambers 3 and 4. The connecting rail 7 of the connecting chamber 3 is in turn connected to the contact spring 26 and via this with the moving contact 27 electrically conductive.

Mit dieser Anschlusskonfiguration ist sichergestellt, dass bei zwischen eine Strom-/Spannungsquelle und eine Last (Verbraucher) gestaltetem Überstromschutzschalter 1 der Laststrom stets über das Bimetall 30 fließt, so dass dieses im Überlastfall, d. h. in Folge eines Überstroms die thermische Auslösung bewirken kann. Hierzu betätigt das Bimetall 30 gegebenenfalls in Folge dessen Ausbiegung den Auslösehebel 29, so dass dessen Verklinkung mit dem Verklinkungshebel 25 geöffnet und die von diesem in Kontaktstellung des Kontaktpaares 27, 28 gehaltene Kontaktfeder 26 in Folge deren Federrückstellkraft verschwenken kann, so dass der Kontakt zwischen dem Bewegkontakt 27 und dem Festkontakt 28 öffnet. Eine Kontaktöffnung kann auch manuell mittels der Schaltwippe 23 erfolgen, in dem diesen in die AUS-Stellung verschwenkt und hierdurch der Verklinkungshebel 25 manuell entklinkt wird.With this connection configuration ensures that when designed between a current / voltage source and a load (consumer) designed overcurrent protection switch 1, the load current always flows through the bimetal 30 so that it in the overload case, d. H. as a result of an overcurrent can cause the thermal tripping. For this purpose, the bimetal 30 optionally actuates the tripping lever 29 as a result of its deflection, so that its latching with the latching lever 25 can be opened and the contact spring held by it in the contact position of the contact pair 27, 28 can pivot as a result of its spring restoring force, so that the contact between the Moving contact 27 and the fixed contact 28 opens. A contact opening can also be done manually by means of the rocker switch 23, in which this pivots in the OFF position and thereby the latching lever 25 is manually unlatched.

Der thermischen Überstromschutzschalter 1 ist für Gleich- und Wechselspannungen im Niedervoltbereich (250V AC und 50V DC oder 65V DC) bei Nennstromstärken zwischen 0,05A und 20A ausgelegt und insbesondere zum Schutz von elektrischen Maschinen, Bordnetzen von Fahrzeugen, Transformatoren und Niederspannungsleitungen vorgesehen. Hierbei können Anschlussleitungen 18 mit einem Leiterquerschnitt im Bereich zwischen 0,14mm2 und 4mm2 klemmkontaktiert werden, wobei nicht nur starre, sondern auch unverdichtete und verdichtete flexible Anschlussleiter mit oder ohne Adernhülse sowie mit oder ohne Kunststoffhülse eingesetzt werden können.The thermal overcurrent circuit breaker 1 is designed for DC and AC voltages in the low voltage range (250V AC and 50V DC or 65V DC) at rated currents between 0.05A and 20A and in particular for the protection of electrical machinery, wiring systems of vehicles, transformers and low voltage cables provided. Here, connecting lines 18 can be clamped with a conductor cross section in the range between 0.14mm 2 and 4mm 2 , whereby not only rigid, but also uncompressed and compressed flexible connection conductors can be used with or without core sleeve and with or without plastic sleeve.

Die Erfindung ist nicht auf die vorstehend beschriebenen Ausführungsbeispiele beschränkt. Vielmehr können auch andere Varianten der Erfindung von dem Fachmann hieraus abgeleitet werden, ohne den Gegenstand der Erfindung zu verlassen. Insbesondere sind ferner alle im Zusammenhang mit den Ausführungsbeispielen beschriebene Einzelmerkmale auch auf andere Weise miteinander kombinierbar, ohne den Gegenstand der Erfindung zu verlassen. Bezugszeichenliste 1 Überstromschutzschalter 22 Kontaktkammer 2 Schaltergehäuse 23 Schaltwippe 2a Gehäusegrundkörper 24 Kappenöffnung 2b Gehäusekappe 25 Verklinkungshebel 2c Gehäusedeckel 26 Kontaktfeder 2d Gehäuseboden 27 Bewegkontakt 2e Bedienseite 28 Festkontakt 3 Anschlusskammer 29 Auslösehebel 4 Anschlusskammer 30 Bimetall 5 Anschlusskammer 6 Federelement 6a erster Federschenkel 6b zweiter Federschenkel 6c Zwischenschenkel 7 Anschlussschiene 7a erster Schienenschenkel 7b zweiter Schienenschenkel 8 Gehäuselängsrichtung 9 Kammeraußenwand 10 Kammerzwischenwand 11 Gehäusequerrichtung 12 erste Gehäuseöffnung 13 zweite Gehäuseöffnung 14 Betätigungshülse 15 Rastnase 16 Randkontur 17 Stützkontur 18 Anschlussleitung 19 Leiterende 20 Anlagekontur 21 Stützkontur The invention is not limited to the embodiments described above. Rather, other variants of the invention can be derived therefrom by the person skilled in the art without the subject matter of the invention leave. In particular, all individual features described in connection with the exemplary embodiments can also be combined with one another in other ways, without departing from the subject matter of the invention. LIST OF REFERENCE NUMBERS 1 Overcurrent circuit breaker 22 contact chamber 2 switch housing 23 rocker 2a Housing body 24 cap opening 2 B housing cap 25 latching lever 2c housing cover 26 contact spring 2d caseback 27 moving contact 2e operating side 28 fixed contact 3 terminal chamber 29 sear 4 terminal chamber 30 bimetallic 5 terminal chamber 6 spring element 6a first spring leg 6b second spring leg 6c intermediate leg 7 connecting rail 7a first rail leg 7b second rail leg 8th Housing longitudinally 9 Chamber outer wall 10 Chamber partition 11 Housing transverse direction 12 first housing opening 13 second housing opening 14 actuating sleeve 15 locking lug 16 edge contour 17 support contour 18 connecting cable 19 conductor end 20 contact contour 21 support contour

Claims (11)

  1. Thermal overcurrent circuit breaker (1) having a switch housing (2), in which a manually activatable snap-action switch mechanism (25 to 29), a thermal expansion element (30) interacting therewith, in particular a bimetal, and a movement contact (27) interacting with the snap-action switch mechanism (25 to 29) and a fixed contact (28) are arranged, which is connected to a first attachment rail (7), while the movement contact (27) is contacted with a second attachment rail (7) via the thermal expansion element (30),
    characterised in that
    - the switch housing (2) has a housing base body (2a) having a number of attachment chambers (3, 4, 5) and having a contact chamber (22) located between these and an operating side (2e), in which contact chamber (22) the snap-action switch mechanism (25 to 29) is arranged together with the thermal expansion element (30),
    - in each attachment chamber (3, 4, 5), one of the attachment rails (7) and a two-limbed spring element (6) for the clamping contact of an attachment lead (18) guided into the attachment chamber (3, 4, 5) via a first housing opening (12) is arranged with the attachment rail (7) having a first spring limb (6a) and a second spring limb (6b), and
    - a second housing opening (13) parallel to the first housing opening (12) and covered by the second spring limb (6b) in its abutment position opens into the respective attachment chamber (3, 4, 5) for the pivoting actuation of the second spring limb (6b).
  2. Overcurrent circuit breaker (1) according to claim 1,
    characterised in that
    the first spring limb (6a) of the spring element (6) is supported in a contacting manner on a first rail limb (7a) of the attachment rail (7), and the second spring limb (6b) of the spring element (6) runs at an angle greater than 45° relative to its first spring limb (6a), preferably greater than 60°, and smaller than 180°, in particular smaller than or equal to 90°.
  3. Overcurrent circuit breaker (1) according to claim 1 or 2,
    characterised in that,
    seen in the direction of the free end of the second spring limb (6a) of the spring element (6), the second housing opening (13) opening into the respective connection chamber (3, 4, 5) is arranged in front the respective first housing opening (12).
  4. Overcurrent circuit breaker (1) according to one of claims 1 to 3,
    characterised in that
    an actuation sleeve (14), in particular having a supporting contour (17) for a tool, is inserted or can be inserted into the second housing opening (13) for the indirect pivoting actuation of the second spring limb (6b).
  5. Overcurrent circuit breaker (1) according to claim 4,
    characterised in that
    the actuation sleeve (14) in the second housing opening (13) can be shifted at least marginally in the longitudinal direction of the housing (8).
  6. Overcurrent circuit breaker (1) according to claim 4 or 5,
    characterised in that
    a latching nose (15) is moulded onto the actuation sleeve (14), said latching nose (15) undercutting an edge contour (16) of the second housing opening (13) inside the corresponding attachment chamber (3, 4, 5) in the mounted state of the actuation sleeve (14).
  7. Overcurrent circuit breaker (1) according to one of claims 1 to 6,
    characterised in that
    the second spring limb (6a) of the spring element (6) inside the attachment chamber (3, 4, 5) can be moved out of an abutment position that at least partially covers the second housing opening (13) and the first housing opening (12) against the spring force into a pivoting position directed towards the first spring limb (6a) for the clamp contacting of the attachment lead (18) guided into the attachment chamber (3, 4, 5) via the first housing opening (12).
  8. Overcurrent circuit breaker (1) according to one of claims 1 to 7,
    characterised in that
    - the two spring limbs (6a, 6b) of the spring element (6) are connected via an intermediary limb (6c) formed in the manner of an open loop, and
    - inside the attachment chamber (3, 4, 5), it has an abutment contour (20) adjusted to the shape of the loop and a supporting contour (20, 21), between which the intermediary limb (6c) abutting thereon is seated.
  9. Overcurrent circuit breaker (1) according to one of claims 1 to 8,
    characterised by
    a U-shaped attachment rail (7), which abuts on a chamber wall (9, 10) of the attachment chamber (3, 4, 5) with at least one of the two rail limbs (7a, 7b) and/or the central limb (6c) connecting these to form the U-shape.
  10. Overcurrent circuit breaker (1) according to one of claims 1 to 9,
    characterised in that
    the snap-action spring mechanism (25 to 29) has a latching lever (25) coupled to a manually activatable switching element (2), in particular a rocker switch, and interacting with a contact spring (26) bearing the movement contact (27), as well as a release lever (29) coupled to this which interacts with the thermal expansion element (30).
  11. Overcurrent circuit breaker (1) according to one of claims 1 to 10,
    characterised by
    a third attachment rail (7) that is directly connected to the movement contact (27) and connected to the second attachment rail (7) via the thermal expansion element (30) and that is arranged in a further attachment chamber (3, 4, 5) with a further two-limbed spring element (6) for the clamping contact of an attachment lead (18) guided into this via a housing opening (12, 13).
EP15701468.9A 2014-02-13 2015-01-15 Thermal overcurrent circuit breaker Active EP3105771B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15701468T PL3105771T3 (en) 2014-02-13 2015-01-15 Thermal overcurrent circuit breaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014002026 2014-02-13
PCT/EP2015/000060 WO2015120951A1 (en) 2014-02-13 2015-01-15 Thermal overcurrent circuit breaker

Publications (2)

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EP3105771A1 EP3105771A1 (en) 2016-12-21
EP3105771B1 true EP3105771B1 (en) 2018-10-03

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US (1) US10348000B2 (en)
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JP (1) JP6348982B2 (en)
CN (1) CN105993059A (en)
CA (1) CA2939551C (en)
ES (1) ES2703202T3 (en)
PL (1) PL3105771T3 (en)
SG (1) SG11201606674QA (en)
TR (1) TR201815239T4 (en)
WO (1) WO2015120951A1 (en)

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ES2703202T3 (en) 2019-03-07
US10348000B2 (en) 2019-07-09
PL3105771T3 (en) 2019-03-29
CA2939551A1 (en) 2015-08-20
EP3105771A1 (en) 2016-12-21
TR201815239T4 (en) 2018-11-21
CN105993059A (en) 2016-10-05
CA2939551C (en) 2021-06-08
JP6348982B2 (en) 2018-06-27
WO2015120951A1 (en) 2015-08-20
US20160352026A1 (en) 2016-12-01
SG11201606674QA (en) 2016-09-29
JP2017506417A (en) 2017-03-02

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