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EP1956623B1 - Current protection swich with clip - Google Patents

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Publication number
EP1956623B1
EP1956623B1 EP08100927.6A EP08100927A EP1956623B1 EP 1956623 B1 EP1956623 B1 EP 1956623B1 EP 08100927 A EP08100927 A EP 08100927A EP 1956623 B1 EP1956623 B1 EP 1956623B1
Authority
EP
European Patent Office
Prior art keywords
housing part
plane
circuit breaker
section
lies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08100927.6A
Other languages
German (de)
French (fr)
Other versions
EP1956623A3 (en
EP1956623A2 (en
Inventor
Gunther Eckert
Winfried Vierling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1956623A2 publication Critical patent/EP1956623A2/en
Publication of EP1956623A3 publication Critical patent/EP1956623A3/en
Application granted granted Critical
Publication of EP1956623B1 publication Critical patent/EP1956623B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut

Definitions

  • the invention relates to a circuit breaker with a terminal comprising a clamping frame which is displaceable by turning a screw in a displacement direction, wherein the clamping frame comprises at least one side wall whose outer surface lies in a plane, and which defines a defined perpendicular to the direction of width an inner surface of a portion of a housing part of the circuit breaker has.
  • FIG. 1 an interior perspective view of a circuit breaker according to the prior art
  • FIG. 2 the view of the opened circuit breaker according to FIG. 1 from the side
  • FIG. 3 the section III-III FIG. 2 with closed circuit breaker.
  • a generally designated 10 circuit breaker comprises a first housing part 12 which in the 1 and 2 is shown open and in the representation according to FIG. 3 by a second housing part 14, which serves as a lid, is closed.
  • a plurality of terminals is formed in circuit breakers.
  • One of these terminals, namely a designated 16 in total terminal is in the 1 to 3 shown.
  • the clamp 16 comprises a clamping frame 18, in which a screw 20 engages.
  • the clamping frame 18 has an upper wall 22 with an opening for the screw 20, a lower wall 24 which includes a bent portion 25, and the upper wall 22 and the lower wall 24 are interconnected by side walls 26 and 28.
  • the side walls 26 and 28 have plate-shaped sections. This means that in particular their outer surface is flat, ie lies in one plane.
  • a terminal 30 protrudes.
  • the clamp is used to press an electrical conductor, not shown in the FIG against the terminal 30.
  • An electrical conductor is in particular via an in FIG. 1 half-visible opening 32 in the clamping frame 18 inserted, namely between the side walls 26 and 28 and between the lower wall 24 and the terminal 30.
  • the screw 20 is supported on the terminal 30 from (not shown). When turning the screw 20, therefore, the clamping frame 18 moves relative to the unmoved screw in a direction of displacement, namely upwards. In this displacement of the clamping frame 18 thus reduces the distance between the bottom wall 24 and the terminal 30.
  • a through the opening 32 between the side walls 28 and 26 of the clamping frame 18 inserted electrical conductor is finally clamped between the wall 24 and the terminal 30 and thereby firmly pressed against the terminal 30 so that the desired electrical contact is made. Due to the resulting resistance when clamping the electrical conductor further movement of the clamping frame 18 is prevented in the direction of displacement. Instead, it comes with a further rotation of the screw 20 to a rotation of the clamping frame until it rests against the terminal 30, which can prevent further rotation as a metal part.
  • the clamping frame is in the twisted position in FIG. 3
  • the side walls 26 and 28 are slightly tilted relative to the terminal 30. The problem here is that the side walls 26 and 28 press against the housing parts 12 and 14.
  • respective portions 34 of the housing part 12 and 36 of the housing part 14, to which the side walls 28 and 26 point, are also designed to have a flat inner surface.
  • the inner surface of the housing part 12 in the region of the portion 34 lies in the in FIG. 3 indicated plane E (which is perpendicular to the plane of the paper), and the inner surface of the portion 36 of the housing part 14 is located in the plane perpendicular to the plane extending plane E '.
  • plane E which is perpendicular to the plane of the paper
  • the inner surface of the portion 36 of the housing part 14 is located in the plane perpendicular to the plane extending plane E '.
  • the EP 0 541 459 A1 describes a generic screw, which is arranged in a recess of a housing comprising a switch.
  • the case is made of cast, insulated material and includes two half shells.
  • the screw clamp comprises a metallic cage which is displaced by turning a screw in the recess to clamp a connection cable.
  • Two side walls of the cage each have projecting teeth whose respective tip is formed as an anchoring edge. When tightening the screw, the teeth dig Side walls by means of the anchoring edges in the respective wall of the half-shell. As a result, the two half-shells are contracted.
  • the DE 100 18 352 C1 describes a clamp with a clamping screw through which a clamping frame relative to a pressure element arranged in a housing is displaceable. At a junction ends of the band-shaped clamping frame are covered by a support which spans the junction bridge-like. As a result, the clamping frame is suitable for high loads. In two subspaces within the clamping frame wires can be inserted. When clamping the wires edge-sided, wedge-like elevations on the clamping frame ensure centering and pinching of the wires.
  • the inner surface of the side of the clamping frame opposite portion of the housing part is not completely in a single plane, with respect to the inner surface, to which the at least one side wall, not yet twisted clamping frame.
  • the portion of the housing part is reshaped and that it should be reshaped so that upon rotation of the clamping frame, the side wall does not touch the housing part.
  • a first width portion of the inner surface of the portion of the housing part to which the side wall faces, in a first plane, and a second width portion of the inner surface of the portion of the housing part lies in a second plane (in a plane of rotation perpendicular to the direction of displacement ) is tilted by a predetermined angle to the first plane.
  • the predetermined angle can be between 2 ° and 10 °. Since the direction of rotation of the screw dictates how around the side walls 26 and 28 tilt, where a contact of the side walls would take place with the housing parts in a twisting, a part of the housing part may be removed, whereby the side walls then turn into space and especially do not press against the housing parts.
  • a recess in the housing part is formed in a section of the portion of the housing part to which the side wall faces.
  • the recess may be formed where otherwise the contact with the housing part would take place and on the other hand does not have to be formed there where no contact with the side wall with the housing part would occur anyway.
  • the recess can basically be shaped as desired. For example, but it has an inner surface which lies in a plane which is parallel to a plane in which the remaining width portion of the housing part, to which the side wall faces.
  • the inner surface of the recess is nothing more than the inner surface of the portion of the housing part displaced by a predetermined distance, this offset being limited by a predetermined distance to the area of a recess and not to the entire portion of the housing part (ie a wall of the housing part as a whole) must be extended.
  • the predetermined distance may be between 0.1 mm and 0.5 mm.
  • FIG. 4 generally designated 40 circuit breaker has substantially the same features as the circuit breaker 10 FIG. 1 on.
  • the circuit breaker 40 is different from the circuit breaker 10 FIG. 1 by the configuration of the inner surface of the portions 34 and 36 of the housing parts 12 and 14:
  • the portions 34 and 36 are those portions of the housing parts 12 and 14, to which the side walls 28 and 26 respectively. While according to FIG. 3 the inner surface of these portions 34 and 36 are each in a plane E and E ', this is no longer the case in the embodiment according to the invention. Rather, a width portion 42 of the portion 34 is to be distinguished from a width portion 44.
  • the inner surface of the width portion 42 lies in a plane E1 (which is perpendicular to the paper plane of FIG.
  • the inner surface of the width portion 44 lies in a plane perpendicular to the paper plane of FIG. 6 extending plane E2, which is rotated with respect to the plane E1 by an angle ⁇ of about 3 ° to 5 °.
  • a kink 46 Between the width sections 42 and 44 is to a certain extent a kink 46.
  • the presence of this kink 46 distinguishes the embodiments according to the 1 to 3 of the embodiments according to the FIGS. 4 to 6 , The course of the kink 46 is in particular in FIG. 5 clearly visible.
  • a kink 48 corresponding kink 46 is also available at the inner surface of the portion 36 of the housing part 14, to which the side wall 26 points.
  • This kink 48 separates a width portion 50 of the portion whose inner surface lies in a plane E1 'of a width portion 54, the inner surface lies in a plane E2'.
  • the planes E1 and E1 'on the one hand and the planes E2 and E2' on the other hand are parallel to each other, so that the planes E1 'and E2' are also rotated by an angle ⁇ .
  • this condition is not necessary for the operation of the invention. Rather, it is important that, unlike in the prior art according to FIG.
  • a simple recess 54 in the housing part 12 and a recess 56 in the housing part 14 may be sufficient to prevent the side walls 28 and 26 housing parts 12 , thereby touch.
  • the recesses 54 and 56 may be designed so that in the region of the recess, the housing part 12 has an inner surface which lies in a plane E4, which is parallel to a plane E3, in which the remaining portion of the housing part 12, to which the side wall 28 points lies.
  • sections of the housing part 14 which lie in a plane E3 '(outside the recess 56, but opposite the side wall 26) or E4' (in the region of the recess 56).
  • the housing parts 12 and 14 By a specific shape of the housing parts 12 and 14 is ensured according to the invention that only in the places material is eliminated, where it is necessary for a rotation of the side walls 26 and 28, if they are not to exert forces on the housing parts 12 and 14.
  • the wall thickness of the housing parts 12 and 14 remain thicker. This ensures sufficient stability.
  • the housing parts 12 and 14 are therefore only in weakened a small area, and their manufacturability and functionality is not impaired. Rather, the problem of the exertion of forces by the side walls 26 and 28 is eliminated.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)

Description

Die Erfindung betrifft einen Leitungsschutzschalter mit einer Klemme, die einen Klemmrahmen umfasst, der durch Drehen einer Schraube in eine Verschieberichtung verschiebbar ist, wobei der Klemmrahmen zumindest eine Seitenwand umfasst, deren Außenoberfläche in einer Ebene liegt, und die über eine senkrecht zur Verschieberichtung definierte Breite zu einer Innenoberfläche eines Abschnitts eines Gehäuseteils des Leitungsschutzschalters weist.The invention relates to a circuit breaker with a terminal comprising a clamping frame which is displaceable by turning a screw in a displacement direction, wherein the clamping frame comprises at least one side wall whose outer surface lies in a plane, and which defines a defined perpendicular to the direction of width an inner surface of a portion of a housing part of the circuit breaker has.

Ein solcher Leitungsschutzschalter ist allgemein bekannt und in den FIG 1 bis 3 veranschaulicht. Hierbei zeigt FIG 1 eine perspektivische Innenansicht eines Leitungsschutzschalters gemäß dem Stand der Technik, FIG 2 die Ansicht des geöffneten Leitungsschutzschalters gemäß FIG 1 von der Seite und FIG 3 den Schnitt III-III aus FIG 2 bei geschlossenem Leitungsschutzschalter.Such a circuit breaker is well known and in the 1 to 3 illustrated. This shows FIG. 1 an interior perspective view of a circuit breaker according to the prior art, FIG. 2 the view of the opened circuit breaker according to FIG. 1 from the side and FIG. 3 the section III-III FIG. 2 with closed circuit breaker.

Ein im Ganzen mit 10 bezeichneter Leitungsschutzschalter gemäß dem Stand der Technik umfasst ein erstes Gehäuseteil 12, das in den FIG 1 und 2 geöffnet gezeigt ist und bei der Darstellung gemäß FIG 3 durch ein zweites Gehäuseteil 14, welches als Deckel dient, geschlossen ist. Üblicherweise ist in Leitungsschutzschaltern eine Vielzahl von Klemmen ausgebildet. Eine dieser Klemmen, nämlich eine im Ganzen mit 16 bezeichnete Klemme, ist in den FIG 1 bis 3 dargestellt. Die Klemme 16 umfasst einen Klemmrahmen 18, in den eine Schraube 20 eingreift. Der Klemmrahmen 18 hat eine obere Wand 22 mit einer Öffnung für die Schraube 20, eine untere Wand 24, welche ein abgebogenes Teilstück 25 umfasst, und die obere Wand 22 und die untere Wand 24 sind durch Seitenwände 26 und 28 miteinander verbunden. Die Seitenwände 26 und 28 haben plattenförmige Abschnitte. Dies bedeutet, dass insbesondere ihre Außenfläche eben gestaltet ist, d. h. in einer Ebene liegt.A generally designated 10 circuit breaker according to the prior art comprises a first housing part 12 which in the 1 and 2 is shown open and in the representation according to FIG. 3 by a second housing part 14, which serves as a lid, is closed. Usually, a plurality of terminals is formed in circuit breakers. One of these terminals, namely a designated 16 in total terminal is in the 1 to 3 shown. The clamp 16 comprises a clamping frame 18, in which a screw 20 engages. The clamping frame 18 has an upper wall 22 with an opening for the screw 20, a lower wall 24 which includes a bent portion 25, and the upper wall 22 and the lower wall 24 are interconnected by side walls 26 and 28. The side walls 26 and 28 have plate-shaped sections. This means that in particular their outer surface is flat, ie lies in one plane.

In den Klemmrahmen 18 ragt ein Anschluss 30 hinein. Die Klemme dient dazu, einen in den FIG nicht gezeigten elektrischen Leiter gegen den Anschluss 30 zu drücken. Ein elektrischer Leiter ist insbesondere über eine in FIG 1 zur Hälfte sichtbare Öffnung 32 in den Klemmrahmen 18 einführbar, nämlich zwischen die Seitenwände 26 und 28 bzw. zwischen die untere Wand 24 und den Anschluss 30. Die Schraube 20 stützt sich an dem Anschluss 30 ab (nicht gezeigt). Bei einem Drehen der Schraube 20 bewegt sich deswegen der Klemmrahmen 18 relativ zur unbewegten Schraube in eine Verschieberichtung, namentlich nach oben. Bei diesem Verschieben des Klemmrahmens 18 verringert sich somit der Abstand zwischen der unteren Wand 24 und dem Anschluss 30. Ein durch die Öffnung 32 zwischen die Seitenwände 28 und 26 des Klemmrahmens 18 eingeführter elektrischer Leiter wird letztlich zwischen der Wand 24 und dem Anschluss 30 festgeklemmt und dadurch fest gegen den Anschluss 30 gedrückt, damit der gewünschte elektrische Kontakt hergestellt wird. Durch den entstehenden Widerstand beim Festklemmen des elektrischen Leiters wird eine weitere Bewegung des Klemmrahmens 18 in Verschieberichtung unterbunden. Stattdessen kommt es bei einem Weiterdrehen der Schraube 20 zu einer Verdrehung des Klemmrahmens, bis er am Anschluss 30 anliegt, der als Metallteil ein weiteres Verdrehen verhindern kann. Der Klemmrahmen ist in der verdrehten Stellung in FIG 3 dargestellt: Die Seitenwände 26 und 28 sind gegenüber dem Anschluss 30 leicht verkippt. Problematisch hierbei ist, dass die Seitenwände 26 und 28 gegen die Gehäuseteile 12 und 14 drücken. Im Stand der Technik sind jeweilige Abschnitte 34 des Gehäuseteils 12 und 36 des Gehäuseteils 14, zu denen die Seitenwände 28 und 26 weisen, ebenfalls so gestaltet, dass sie eine ebene Innenoberfläche aufweisen. Die Innenoberfläche des Gehäuseteils 12 im Bereich des Abschnitts 34 liegt in der in FIG 3 angedeuteten Ebene E (welche senkrecht zur Papierebene steht), und die Innenoberfläche des Abschnitts 36 des Gehäuseteils 14 liegt in der sich senkrecht zur Papierebene erstreckenden Ebene E'. Grundsätzlich ist es nun so, dass die Seitenwände 26 und 28 einerseits und die Gehäuseteile 12 und 14 ausreichend weit voneinander beabstandet sein können, damit das Verdrehen bzw. Verkippen der Seitenwände 26 bzw. 28 ungehindert möglich ist. Tatsächlich wurde im Stand der Technik für den Abstand zwischen den Seitenwänden der Klemmrahmen und den Gehäuseteilen jeweils ein Wert von bis zu 0,5 mm erreicht. Bei Leitungsschutzschaltern, die eine hohe Anzahl von Klemmen haben, ist es jedoch nicht möglich, bei jeder Klemme diesen Abstand bereitzustellen: Die Wände der Gehäuseteile würden dann insgesamt zu dünn werden müssen, damit ausreichend Platz für alle Klemmen vorhanden ist.Into the clamping frame 18, a terminal 30 protrudes. The clamp is used to press an electrical conductor, not shown in the FIG against the terminal 30. An electrical conductor is in particular via an in FIG. 1 half-visible opening 32 in the clamping frame 18 inserted, namely between the side walls 26 and 28 and between the lower wall 24 and the terminal 30. The screw 20 is supported on the terminal 30 from (not shown). When turning the screw 20, therefore, the clamping frame 18 moves relative to the unmoved screw in a direction of displacement, namely upwards. In this displacement of the clamping frame 18 thus reduces the distance between the bottom wall 24 and the terminal 30. A through the opening 32 between the side walls 28 and 26 of the clamping frame 18 inserted electrical conductor is finally clamped between the wall 24 and the terminal 30 and thereby firmly pressed against the terminal 30 so that the desired electrical contact is made. Due to the resulting resistance when clamping the electrical conductor further movement of the clamping frame 18 is prevented in the direction of displacement. Instead, it comes with a further rotation of the screw 20 to a rotation of the clamping frame until it rests against the terminal 30, which can prevent further rotation as a metal part. The clamping frame is in the twisted position in FIG. 3 The side walls 26 and 28 are slightly tilted relative to the terminal 30. The problem here is that the side walls 26 and 28 press against the housing parts 12 and 14. In the prior art, respective portions 34 of the housing part 12 and 36 of the housing part 14, to which the side walls 28 and 26 point, are also designed to have a flat inner surface. The inner surface of the housing part 12 in the region of the portion 34 lies in the in FIG. 3 indicated plane E (which is perpendicular to the plane of the paper), and the inner surface of the portion 36 of the housing part 14 is located in the plane perpendicular to the plane extending plane E '. Basically, it is now so that the side walls 26 and 28 on the one hand and the housing parts 12 and 14 may be sufficiently far apart, so that the rotation or tilting of the side walls 26 and 28 is possible without hindrance. In fact, in the prior art, a value of up to 0.5 mm has been achieved for the distance between the side walls of the clamping frames and the housing parts. However, with miniature circuit breakers having a high number of terminals, it is not possible to provide that distance for each terminal: the walls of the housing parts would then have to be too thin overall to allow sufficient space for all terminals.

Somit nimmt man bisher in Kauf, dass die Seitenwände 26 und 28 beim Drehen des Klemmrahmens 18 die Gehäuseteile 14 bzw. 12 berühren. Bei diesem Berühren wird eine Kraft auf die Gehäuseteile 12 und 14 ausgeübt, welche in FIG 3 eingezeichnet und mit F bezeichnet ist. Bedauerlicherweise verdrehen sich die Seitenwände 26 und 28 gerade beim Erreichen des Endzustands, wenn ein elektrischer Leiter an dem Anschluss 30 festgeklemmt wird. Die Kräfte F wirken daher dauerhaft auf die Gehäuseteile 12 und 14 ein. Da die Gehäuseteile 12 und 14 häufig lediglich aufeinander gesteckt sind und nicht über ihre gesamte Trennfläche aneinander befestigt sind, bewirken diese Kräfte gegebenenfalls, dass die Gehäuseteile 12 und 14 voneinander teilweise getrennt werden, d. h. dass im Bereich einer Verbindungsstelle 38 zwischen den Gehäuseteilen 12 und 14 eine Lücke auftritt, so dass das Gehäuse auseinander klafft.Thus, it is currently accepted that the side walls 26 and 28 when rotating the clamping frame 18, the housing parts 14 and 12 touch. During this contact, a force is exerted on the housing parts 12 and 14, which in FIG. 3 located and designated by F. Unfortunately, sidewalls 26 and 28 are just twisting upon reaching the final state when an electrical conductor is clamped to terminal 30. The forces F therefore act permanently on the housing parts 12 and 14 a. Since the housing parts 12 and 14 are often just plugged onto each other and not attached to each other over their entire separation surface, these forces optionally cause the housing parts 12 and 14 are partially separated from each other, ie that in the region of a connection point 38 between the housing parts 12 and 14th a gap occurs so that the housing gapes apart.

Die EP 0 541 459 A1 beschreibt eine gattungsgemäße Schraubklemme, welche in einer Ausnehmung eines einen Schalter umfassenden Gehäuse angeordnet ist. Das Gehäuse ist aus einem gegossenen, isolierten Material gefertigt und umfasst zwei Halbschalen. Die Schraubklemme umfasst einen metallischen Käfig, welcher durch Drehen einer Schraube in der Ausnehmung verschoben wird, um ein Anschlusskabel festzuklemmen. Zwei Seitenwände des Käfigs weisen jeweils vorspringende Zähne auf, deren jeweilige Spitze als Verankerungskante ausgebildet ist. Beim Anziehen der Schraube graben sich die Zähne der Seitenwände mittels der Verankerungskanten in die jeweilige Wand der Halbschale. Dadurch werden die beiden Halbschalen zusammengezogen.The EP 0 541 459 A1 describes a generic screw, which is arranged in a recess of a housing comprising a switch. The case is made of cast, insulated material and includes two half shells. The screw clamp comprises a metallic cage which is displaced by turning a screw in the recess to clamp a connection cable. Two side walls of the cage each have projecting teeth whose respective tip is formed as an anchoring edge. When tightening the screw, the teeth dig Side walls by means of the anchoring edges in the respective wall of the half-shell. As a result, the two half-shells are contracted.

Die DE 100 18 352 C1 beschreibt eine Klemme mit einer Klemmschraube, durch die ein Klemmrahmen gegenüber einem in einem Gehäuse angeordneten Druckstück verschiebbar ist. An einer Verbindungsstelle sind Enden des bandförmigen Klemmrahmens von einer Auflage abgedeckt, welche die Verbindungsstelle brückenartig überspannt. Dadurch ist der Klemmrahmen für hohe Belastungen geeignet. In zwei Teilräume innerhalb des Klemmrahmens können Drähte eingeführt werden. Beim Einklemmen der Drähte sorgen randseitige, keilartige Erhöhungen am Klemmrahmen für ein Zentrieren und Verquetschen der Drähte.The DE 100 18 352 C1 describes a clamp with a clamping screw through which a clamping frame relative to a pressure element arranged in a housing is displaceable. At a junction ends of the band-shaped clamping frame are covered by a support which spans the junction bridge-like. As a result, the clamping frame is suitable for high loads. In two subspaces within the clamping frame wires can be inserted. When clamping the wires edge-sided, wedge-like elevations on the clamping frame ensure centering and pinching of the wires.

Es ist Aufgabe der Erfindung, einen Leitungsschutzschalter der eingangs genannten Art dahingehend weiterzubilden, dass ein Auseinanderklaffen verhindert wird, wobei beim Festklemmen eines elektrischen Leiters in dem Klemmrahmen an dem Anschluss keine Kräfte auf Gehäuseteile ausgeübt werden.It is an object of the invention to develop a circuit breaker of the type mentioned in that a gaping apart is prevented, wherein no forces are exerted on housing parts when clamping an electrical conductor in the clamping frame at the connection.

Die Aufgabe wird durch einen Leitungsschutzschalter mit den Merkmalen gemäß Patentanspruch 1 gelöst.The object is achieved by a circuit breaker with the features of claim 1.

Erfindungsgemäß liegt die Innenoberfläche des einer Seitenwand des Klemmrahmens gegenüberliegenden Abschnitts des Gehäuseteils (gesehen über dieselbe Breite wie die Seitenwand) nicht vollständig in einer einzigen Ebene, und zwar bei gegenüber der Innenoberfläche, zu der die zumindest eine Seitenwand weist, noch nicht verdrehtem Klemmrahmen.According to the invention, the inner surface of the side of the clamping frame opposite portion of the housing part (seen over the same width as the side wall) is not completely in a single plane, with respect to the inner surface, to which the at least one side wall, not yet twisted clamping frame.

Anstatt also gemäß ursprünglichen Konzepten einfach den Abstand zwischen Seitenwand und gegenüberliegendem Abschnitt des Gehäuseteils zu vergrößern, wird der Abschnitt des Gehäuseteils umgeformt und zwar soll er genau so umgeformt sein, dass bei einem Verdrehen des Klemmrahmens die Seitenwand das Gehäuseteil nicht berührt.So instead of simply enlarging the distance between the side wall and opposite portion of the housing part according to the original concepts, the portion of the housing part is reshaped and that it should be reshaped so that upon rotation of the clamping frame, the side wall does not touch the housing part.

Bei einer ersten Ausführungsform liegt ein erster Breitenabschnitt der Innenoberfläche des Abschnitts des Gehäuseteils, zu dem die Seitenwand weist, in einer ersten Ebene, und ein zweiter Breitenabschnitt der Innenoberfläche des Abschnitts des Gehäuseteils liegt in einer zweiten Ebene, die (in einer Drehebene senkrecht zur Verschieberichtung) um einen vorbestimmten Winkel zur ersten Ebene verkippt ist.In a first embodiment, a first width portion of the inner surface of the portion of the housing part to which the side wall faces, in a first plane, and a second width portion of the inner surface of the portion of the housing part lies in a second plane (in a plane of rotation perpendicular to the direction of displacement ) is tilted by a predetermined angle to the first plane.

Der vorbestimmte Winkel kann zwischen 2° und 10° liegen. Da die Drehrichtung der Schraube vorgibt, wie herum sich die Seitenwände 26 und 28 verkippen, kann dort, wo eine Berührung der Seitenwände mit den Gehäuseteilen bei einem Verdrehen stattfinden würde, ein Teil des Gehäuseteils weggenommen sein, wodurch sich die Seitenwände dann ins Leere hineinverdrehen und insbesondere nicht gegen die Gehäuseteile drücken.The predetermined angle can be between 2 ° and 10 °. Since the direction of rotation of the screw dictates how around the side walls 26 and 28 tilt, where a contact of the side walls would take place with the housing parts in a twisting, a part of the housing part may be removed, whereby the side walls then turn into space and especially do not press against the housing parts.

Bei einer alternativen Ausführungsform ist in einem Teilabschnitt des Abschnitts des Gehäuseteils, zu dem die Seitenwand weist, eine Aussparung in dem Gehäuseteil ausgebildet.In an alternative embodiment, a recess in the housing part is formed in a section of the portion of the housing part to which the side wall faces.

Die Aussparung kann dort gebildet sein, wo sonst die Berührung mit dem Gehäuseteil stattfinden würde und muss andererseits dort nicht ausgebildet sein, wo ohnehin keine Berührung mit der Seitenwand mit dem Gehäuseteil auftreten würde.The recess may be formed where otherwise the contact with the housing part would take place and on the other hand does not have to be formed there where no contact with the side wall with the housing part would occur anyway.

Die Aussparung kann grundsätzlich beliebig geformt sein. Zum Beispiel aber hat sie eine Innenoberfläche, die in einer Ebene liegt, welche zu einer Ebene parallel ist, in der der restliche Breitenabschnitt des Gehäuseteils liegt, zu dem die Seitenwand weist. In diesem Falle ist die Innenoberfläche der Aussparung nichts anderes als die um einen vorbestimmten Abstand versetzte Innenoberfläche des Abschnitts des Gehäuseteils, wobei diese Versetzung um einen vorbestimmten Abstand eben auf den Bereich einer Aussparung beschränkt ist und nicht auf den gesamten Abschnitt des Gehäuseteils (also eine Wand des Gehäuseteils als Ganzes) ausgedehnt sein muss. Der vorbestimmte Abstand kann zwischen 0,1 mm und 0,5 mm liegen. Im Unterschied zu der genannten Ausführungsform bei der das gesamte Gehäuseteil zu der Seitenwand beabstandet ist, kann es möglich sein, den Abstand von 0,5 mm im Bereich einer Aussparung bereitzustellen, wenn der restliche Abschnitt des Gehäuseteils ausreichend stabil ist. Oben waren ja Stabilitätsgründe dafür genannt worden, dass ein Abstand von 0,5 mm nicht unbedingt eingehalten werden kann, wenn eine Vielzahl von Klemmen in einem Leitungsschutzschalter bereitgestellt ist.The recess can basically be shaped as desired. For example, but it has an inner surface which lies in a plane which is parallel to a plane in which the remaining width portion of the housing part, to which the side wall faces. In this case, the inner surface of the recess is nothing more than the inner surface of the portion of the housing part displaced by a predetermined distance, this offset being limited by a predetermined distance to the area of a recess and not to the entire portion of the housing part (ie a wall of the housing part as a whole) must be extended. The predetermined distance may be between 0.1 mm and 0.5 mm. In contrast to the said embodiment in which the entire housing part is spaced from the side wall, it may be possible to provide the spacing of 0.5 mm in the region of a recess when the remaining portion of the housing part is sufficiently stable. Stability reasons have been mentioned above for the fact that a distance of 0.5 mm can not necessarily be maintained if a plurality of terminals is provided in a circuit breaker.

Nachfolgend wird eine bevorzugte Ausführungsform der Erfindung unter Bezug auf die Zeichnung beschrieben.Hereinafter, a preferred embodiment of the invention will be described with reference to the drawings.

In der Zeichnung zeigt:

FIG 1
eine perspektivische Innenansicht eines Leitungsschutzschalters gemäß dem Stand der Technik,
FIG 2
eine Seitenansicht des Leitungsschutzschalters aus FIG 1,
FIG 3
den Schnitt III-III aus FIG 2 bei geschlossenem Leitungsschutzschalter,
FIG 4
eine perspektivische Innenansicht eines erfindungsgemäßen Leitungsschutzschalters entsprechend FIG 1,
FIG 5
eine Seitenansicht des erfindungsgemäßen Leitungsschutzschalters aus FIG 4 entsprechend FIG 2,
FIG 6
den Schnitt VI-VI aus FIG 5 bei geschlossenem Leitungsschutzschalter und
FIG 7
eine FIG 6 entsprechende Darstellung einer alternativen Ausführungsform eines erfindungsgemäßen Leitungsschutzschalters.
In the drawing shows:
FIG. 1
an interior perspective view of a circuit breaker according to the prior art,
FIG. 2
a side view of the circuit breaker FIG. 1 .
FIG. 3
the section III-III FIG. 2 with closed circuit breaker,
FIG. 4
an interior perspective view of a circuit breaker according to the invention accordingly FIG. 1 .
FIG. 5
a side view of the circuit breaker of the invention FIG. 4 corresponding FIG. 2 .
FIG. 6
the section VI-VI FIG. 5 with closed circuit breaker and
FIG. 7
a FIG. 6 corresponding representation of an alternative embodiment of a circuit breaker according to the invention.

Ein in FIG 4 im Ganzen mit 40 bezeichneter Leitungsschutzschalter weist im Wesentlichen dieselben Merkmale wie der Leitungsschutzschalter 10 aus FIG 1 auf. Der Leitungsschutzschalter 40 unterscheidet sich von dem Leitungsschutzschalter 10 aus FIG 1 durch die Gestaltung der Innenoberfläche der Abschnitte 34 und 36 der Gehäuseteile 12 und 14: Die Abschnitte 34 und 36 sind diejenigen Abschnitte der Gehäuseteile 12 und 14, zu denen die Seitenwände 28 bzw. 26 weisen. Während gemäß FIG 3 die Innenoberfläche dieser Abschnitte 34 und 36 jeweils in einer Ebene E bzw. E' liegen, ist dies bei der erfindungsgemäßen Ausführungsform nicht mehr der Fall. Vielmehr ist ein Breitenabschnitt 42 des Abschnitts 34 von einem Breitenabschnitt 44 zu unterscheiden. Die Innenoberfläche des Breitenabschnitts 42 liegt in einer Ebene E1 (welche sich senkrecht zur Papierebene von FIG 6 erstreckt), und die Innenoberfläche des Breitenabschnitts 44 liegt in einer sich senkrecht zur Papierebene von FIG 6 erstreckenden Ebene E2, welche gegenüber der Ebene E1 um einen Winkel α von ca. 3° bis 5° verdreht ist. Zwischen den Breitenabschnitten 42 und 44 befindet sich gewissermaßen eine Knickstelle 46. Das Vorhandensein dieser Knickstelle 46 unterscheidet die Ausführungsformen gemäß den FIG 1 bis 3 von den Ausführungsformen gemäß den FIG 4 bis 6. Der Verlauf der Knickstelle 46 ist insbesondere in FIG 5 gut zu erkennen.An in FIG. 4 generally designated 40 circuit breaker has substantially the same features as the circuit breaker 10 FIG. 1 on. The circuit breaker 40 is different from the circuit breaker 10 FIG. 1 by the configuration of the inner surface of the portions 34 and 36 of the housing parts 12 and 14: The portions 34 and 36 are those portions of the housing parts 12 and 14, to which the side walls 28 and 26 respectively. While according to FIG. 3 the inner surface of these portions 34 and 36 are each in a plane E and E ', this is no longer the case in the embodiment according to the invention. Rather, a width portion 42 of the portion 34 is to be distinguished from a width portion 44. The inner surface of the width portion 42 lies in a plane E1 (which is perpendicular to the paper plane of FIG. 6 extends), and the inner surface of the width portion 44 lies in a plane perpendicular to the paper plane of FIG. 6 extending plane E2, which is rotated with respect to the plane E1 by an angle α of about 3 ° to 5 °. Between the width sections 42 and 44 is to a certain extent a kink 46. The presence of this kink 46 distinguishes the embodiments according to the 1 to 3 of the embodiments according to the FIGS. 4 to 6 , The course of the kink 46 is in particular in FIG. 5 clearly visible.

Eine der Knickstelle 46 entsprechende Knickstelle 48 gibt es auch bei der Innenoberfläche des Abschnitts 36 des Gehäuseteils 14, zu welchem die Seitenwand 26 weist. Diese Knickstelle 48 trennt einen Breitenabschnitt 50 des Abschnitts, dessen Innenoberfläche in einer Ebene E1' liegt, von einem Breitenabschnitt 54, dessen Innenoberfläche in einer Ebene E2' liegt. Bevorzugt ist vorgesehen, dass die Ebenen E1 und E1' einerseits und die Ebenen E2 und E2' andererseits zueinander parallel sind, so dass die Ebenen E1' und E2' ebenfalls um einen Winkel α gegenüber verdreht sind. Diese Bedingung ist jedoch für das Funktionieren der Erfindung nicht notwendig. Von Bedeutung ist vielmehr, dass anders als im Stand der Technik gemäß FIG 3, bei der die Seitenwände 26 und 28 in dem dargestellten verdrehten Zustand die Gehäuseteile 14 bzw. 12 berühren und die Kraft F ausüben, bei der erfindungsgemäßen Ausführungsform gemäß FIG 6 so, dass die Seitenwand 26 das Gehäuseteil 14 nicht berührt und die Seitenwand 28 das Gehäuseteil 12 nicht berührt. Insbesondere durch die entsprechende Gestaltung der Breitenabschnitte 44 und 52 ist ausreichender Platz geschaffen für die Seitenwände 28 bzw. 26, auch im Falle ihrer Verdrehung. Die Breitenabschnitte 42 und 50 sind demgemäß von untergeordneter Bedeutung, sie können aussehen wie entsprechende Teilabschnitte der Abschnitte 34 und 36 in FIG 3: Die Ebenen E1 und E1' aus FIG 6 können so definiert sein wie die Ebenen E und E' aus FIG 3.A kink 48 corresponding kink 46 is also available at the inner surface of the portion 36 of the housing part 14, to which the side wall 26 points. This kink 48 separates a width portion 50 of the portion whose inner surface lies in a plane E1 'of a width portion 54, the inner surface lies in a plane E2'. It is preferably provided that the planes E1 and E1 'on the one hand and the planes E2 and E2' on the other hand are parallel to each other, so that the planes E1 'and E2' are also rotated by an angle α. However, this condition is not necessary for the operation of the invention. Rather, it is important that, unlike in the prior art according to FIG. 3 in which the side walls 26 and 28 in the illustrated twisted state, contact the housing parts 14 and 12, respectively, and apply the force F, according to the embodiment of the present invention FIG. 6 such that the side wall 26 does not touch the housing part 14 and the side wall 28 does not touch the housing part 12. In particular, by the corresponding design of the width sections 44 and 52 sufficient space is created for the side walls 28 and 26, even in the case of their rotation. The width sections 42 and 50 are accordingly of minor importance, they may look like corresponding sections of the sections 34 and 36 in FIG. 3 : The levels E1 and E1 'off FIG. 6 can be defined as the planes E and E ' FIG. 3 ,

Da es nur auf den Bereich ankommt, in den die Seitenwände 26 und 28 hineinschwenken, kann auch eine einfache Aussparung 54 im Gehäuseteil 12 und eine Aussparung 56 im Gehäuseteil 14 genügen, um zu verhindern, dass die Seitenwände 28 bzw. 26 Gehäuseteile 12 bzw. 14 berühren. Die Aussparungen 54 und 56 können so gestaltet sein, dass im Bereich der Aussparung das Gehäuseteil 12 eine Innenoberfläche hat, welche in einer Ebene E4 liegt, welche zu einer Ebene E3 parallel ist, in der der restliche Abschnitt des Gehäuseteils 12, zu dem die Seitenwand 28 weist, liegt. Entsprechendes gilt für Teilabschnitte des Gehäuseteils 14, welche in einer Ebene E3' (außerhalb der Aussparung 56, aber gegenüber der Seitenwand 26) bzw. E4' (im Bereich der Aussparung 56) liegen.Since it only depends on the area in which the side walls 26 and 28 pivot in, a simple recess 54 in the housing part 12 and a recess 56 in the housing part 14 may be sufficient to prevent the side walls 28 and 26 housing parts 12 bzw. 14 touch. The recesses 54 and 56 may be designed so that in the region of the recess, the housing part 12 has an inner surface which lies in a plane E4, which is parallel to a plane E3, in which the remaining portion of the housing part 12, to which the side wall 28 points lies. The same applies to sections of the housing part 14, which lie in a plane E3 '(outside the recess 56, but opposite the side wall 26) or E4' (in the region of the recess 56).

Durch eine spezifische Formgebung der Gehäuseteile 12 und 14 ist erfindungsgemäß gewährleistet, dass nur an den Stellen Material beseitigt wird, an denen es für ein Verdrehen der Seitenwände 26 und 28 notwendig ist, wenn diese keine Kräfte auf die Gehäuseteile 12 und 14 ausüben sollen. Im übrigen Bereich der Gehäuseteile 12 und 14, d. h. insbesondere im übrigen Bereich der Abschnitte 34 und 36, zu denen die Seitenwände 28 bzw. 26 weisen, kann die Wandstärke der Gehäuseteile 12 und 14 dicker bleiben. Damit ist eine ausreichende Stabilität gewährleistet. Die Gehäuseteile 12 und 14 sind also nur in einem kleinen Bereich geschwächt, und ihre Herstellbarkeit und Funktionsfähigkeit ist nicht beeinträchtigt. Vielmehr wird das Problem der Ausübung von Kräften durch die Seitenwände 26 und 28 beseitigt.By a specific shape of the housing parts 12 and 14 is ensured according to the invention that only in the places material is eliminated, where it is necessary for a rotation of the side walls 26 and 28, if they are not to exert forces on the housing parts 12 and 14. In the remaining area of the housing parts 12 and 14, ie in particular in the remaining area of the sections 34 and 36, to which the side walls 28 and 26 point, the wall thickness of the housing parts 12 and 14 remain thicker. This ensures sufficient stability. The housing parts 12 and 14 are therefore only in weakened a small area, and their manufacturability and functionality is not impaired. Rather, the problem of the exertion of forces by the side walls 26 and 28 is eliminated.

Claims (6)

  1. Line circuit breaker (40) having a terminal (16) which comprises a terminal frame (18) which can be displaced in a displacement direction by turning a screw (20), wherein the terminal frame (18) comprises at least one side wall (26, 28), the outer surface of which lies in one plane and which, over a width which is defined perpendicularly in relation to the displacement direction, faces an inner surface of a section (34, 36) of a housing part of the line circuit breaker (40), characterized in that, when the terminal frame (18) is not yet turned towards the inner surface of the section (34, 36) of the housing part (12, 14), the inner surface of the section (34, 36) of the housing part (12, 14), the at least one side wall (26, 28) facing the said inner surface, does not lie entirely in a single plane (E1, E2; E1', E2'; E3, E4; E3', E4').
  2. Line circuit breaker (40) according to Claim 1, characterized in that a first width section (42, 50) of the inner surface of the section (34, 36) of the housing part (12, 14), the side wall (28, 26) facing the said first width section, lies in a first plane (E1, E1') and a second width section of the inner surface of the section (34, 36) of the housing part (12, 14) lies in a second plane (E2, E2') which is tilted about a predetermined angle (α) in relation to the first plane (E1, E1').
  3. Line circuit breaker (40) according to Claim 2, characterized in that the predetermined angle (α) lies between 2° and 10°.
  4. Line circuit breaker according to Claim 1, characterized in that a cutout (54, 56) is formed in the housing part (12, 14) in a portion of the section of the housing part, the side wall (26, 28) facing the said portion.
  5. Line circuit breaker according to Claim 4, characterized in that the cutout (54, 56) has an inner surface which lies in a plane (E4, E4') which is at a predetermined distance from a plane (E3, E3') in which the remaining section of the housing part (12, 14) lies, the inner wall facing the said remaining section.
  6. Line circuit breaker according to Claim 5, characterized in that the predetermined distance is between 0.1 mm and 0.5 mm.
EP08100927.6A 2007-02-08 2008-01-25 Current protection swich with clip Active EP1956623B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007006367A DE102007006367A1 (en) 2007-02-08 2007-02-08 Circuit breaker with terminal

Publications (3)

Publication Number Publication Date
EP1956623A2 EP1956623A2 (en) 2008-08-13
EP1956623A3 EP1956623A3 (en) 2009-11-25
EP1956623B1 true EP1956623B1 (en) 2019-06-05

Family

ID=39332209

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Application Number Title Priority Date Filing Date
EP08100927.6A Active EP1956623B1 (en) 2007-02-08 2008-01-25 Current protection swich with clip

Country Status (4)

Country Link
EP (1) EP1956623B1 (en)
CN (1) CN101242037B (en)
DE (1) DE102007006367A1 (en)
ES (1) ES2745114T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE545175T1 (en) * 2009-10-26 2012-02-15 Schneider Electric Ind Sas ARRANGEMENT FOR MULTIPLE CONNECTIONS IN AN ELECTRICAL DEVICE
CN114566408B (en) * 2022-03-14 2023-09-01 杭州电力设备制造有限公司 Safety circuit breaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1790153A1 (en) * 1967-09-29 1972-01-20 Telemeccanica Elettrica Ohg Ri Terminal for connecting electrical conductors
DE3727357A1 (en) * 1987-08-17 1989-03-02 Asea Brown Boveri Anchoring of built-in parts in electrical switching apparatuses
FR2683680B1 (en) * 1991-11-07 1993-12-31 Merlin Gerin SCREW TERMINAL FOR AN ELECTRICAL APPARATUS WITH INSULATED MOLDED HOUSING.
EP0613213B1 (en) * 1993-02-26 1997-04-23 Siemens Aktiengesellschaft Terminal made from strip material
EP0847105B1 (en) * 1996-11-29 1999-06-02 Hager Electro S.A. Wire connecting terminal in a modular electrical device
DE10018352C1 (en) * 2000-04-13 2001-09-27 Siemens Ag Clamp arrangement with housing for automatic cut-out or fault- current (FI) circuit-breaker circuit
CN2599772Y (en) * 2003-02-24 2004-01-14 上海合璧电子电器有限公司 Improved connector socket
FR2862443B1 (en) * 2003-11-14 2006-10-27 Schneider Electric Ind Sas ELECTRICAL CONNECTION TERMINAL AND ELECTRICAL PROTECTION APPARATUS COMPRISING SUCH A TERMINAL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2745114T3 (en) 2020-02-27
CN101242037B (en) 2011-12-28
EP1956623A3 (en) 2009-11-25
EP1956623A2 (en) 2008-08-13
DE102007006367A1 (en) 2008-08-21
CN101242037A (en) 2008-08-13

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