EP0637099A2 - Rail-mounted terminal assembly with overvoltage protection devices - Google Patents

Rail-mounted terminal assembly with overvoltage protection devices Download PDF

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Publication number
EP0637099A2
EP0637099A2 EP94106796A EP94106796A EP0637099A2 EP 0637099 A2 EP0637099 A2 EP 0637099A2 EP 94106796 A EP94106796 A EP 94106796A EP 94106796 A EP94106796 A EP 94106796A EP 0637099 A2 EP0637099 A2 EP 0637099A2
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EP
European Patent Office
Prior art keywords
busbar
terminal block
contact
elements
spring
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.)
Granted
Application number
EP94106796A
Other languages
German (de)
French (fr)
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EP0637099B1 (en
EP0637099A3 (en
Inventor
Dietmar Horn
Klaus Strate
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.)
Weidmueller Interface GmbH and Co KG
Original Assignee
Weidmueller Interface GmbH and Co KG
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Publication date
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Publication of EP0637099A2 publication Critical patent/EP0637099A2/en
Publication of EP0637099A3 publication Critical patent/EP0637099A3/en
Application granted granted Critical
Publication of EP0637099B1 publication Critical patent/EP0637099B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
    • H01R9/2625—Clip-on terminal blocks for side-by-side rail- or strip-mounting with built-in electrical component
    • H01R9/2641—Clip-on terminal blocks for side-by-side rail- or strip-mounting with built-in electrical component with built-in overvoltage protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6666—Structural association with built-in electrical component with built-in electronic circuit with built-in overvoltage protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/922—Telephone switchboard protector

Definitions

  • the invention relates to a terminal block arrangement consisting of 2 or more terminal blocks with inserted overvoltage protection elements and a transverse busbar, with an electrical connection of the contact elements of the overvoltage protection element on the one hand to the busbar of the respective terminal block and on the other hand to the busbar.
  • Terminal block arrangements of the generic type are used, for example, in control cabinets in order to protect sensitive electronic components from being destroyed by overvoltage pulses occurring in the electrical supply network. If such overvoltages occur, they are supplied to an existing grounding potential with the aid of the overvoltage protection element, the protection circuit becoming unusable, so that a harmful influence on the electrical components connected to the terminal block is excluded. After the occurrence of overvoltages, the housing of the overvoltage protection elements usually change color and are then exchanged for intact elements. Terminal blocks with surge protection devices are known from the catalog of the Fudji Electric company, in which the contact elements of the Intervene overvoltage elements in holding elements, which must be electrically conductive and which are connected to the busbar.
  • the object of the present invention is therefore to create a terminal block arrangement of the generic type which, due to its construction, has particularly favorable electrical properties at low manufacturing costs.
  • This object is achieved in that directly contacting spring elements are provided for the electrical connection of the contact elements of the overvoltage protection.
  • the direct contact of the contact elements to the busbar or to the busbar saves at least two current transfer points, depending on the design of conventional terminal block arrangements of the generic type, ie two current transfer resistors are omitted.
  • the spring elements used for electrical contacting only have the purely mechanical function of providing the contact force necessary for good current transfer between the contact elements and the busbar or busbar. When choosing the material for these spring elements, you can rely entirely on the Focus optimal spring properties for the spring elements used. In addition, the non-existent flow of current through the spring elements helps to prevent the material material from showing signs of aging, which may result from the heating caused by the flow of current. This is particularly important where the time intervals between the replacement of surge protective devices are relatively long.
  • the construction of the terminal blocks according to the invention is also to be regarded as particularly cost-effective from the point of view of manufacture and assembly, since only two spring elements that are simple to produce are required, which are inserted into the housing without additional connection work as part of the terminal block assembly.
  • This also has the advantage that the function of the terminal block can be changed or expanded in a simple manner by retrofitting terminal blocks with two spring elements, a busbar and a surge protection device. The insertion of the spring elements can basically be done from any direction in a flexible manner.
  • terminal blocks are usually fixed within control cabinets on standardized mounting rails, it can be used for the application that these mounting rails are also used as the busbars carrying the earthing potential, the contacting by means of a spring element with the then Carry out the contact foot in the terminal block that is electrically connected to the busbar.
  • the design of the spring elements in the form of a U-shaped base body with two opposing one-sided elongated spring legs, which are convexly curved at their free end facing away from the base body, fulfills the purpose of the spring element in a particularly simple and inexpensive manner to provide sufficient contact force.
  • the two contact elements 8 of the overvoltage protection element 2 are inserted through housing openings 17 into the terminal block housing 10 in such a way that one contact element 8 touches the busbar 5 laterally and the other contact element touches one leg of the busbar 4 which runs in a U-shaped manner in the housing.
  • the mechanical contact force between busbar 4, busbar 5 and the respective contact elements 8 is generated by spring elements 6.
  • the structure of this spring element is illustrated in FIG. 2 by the enlarged perspective representation of part of the busbar 4, the contact element 8 and the spring element 6.
  • the spring element 6 has a U-shaped base body 20, which engages around the busbar 4 on one side.
  • the two legs of the U-shaped base body 20 are extended on one side upwards and form the spring legs 21 and 22.
  • the free ends of the spring legs 21 and 22 facing away from the base body are curved convexly at their ends, so that there is a gap between them mutually facing surfaces of the spring legs 21 and 22 due to the curvature results in a smaller distance than that of the two legs in the area of the base body 20.
  • the outer curvatures of the spring legs 21 and 22 thus form two contact surfaces 23 and 24, between which the busbar 4 and 1 arranged next to one another Contact element 8 of the surge protector 2 are pressed against each other.
  • the spring elements 6 can be made of metal, but it is equally conceivable to use the special elastic properties of certain plastics to provide the necessary contact force.
  • FIG. 3 shows a construction variant of a terminal block with overvoltage protection element, in which the overvoltage protection element 2 is not arranged in a recess on the top of the terminal block housing 10, but is located on the side next to the housing.
  • the busbar 4 is likewise provided with two terminal connections 12 and is guided in a straight line from one side to the other side of the terminal block housing 10.
  • the Busbar 4 has a U-shaped part 9 bent downward in the direction of the mounting rail, one leg of the U-shaped part being aligned parallel to horizontal folds 33 of mounting rail 3. The distance between the fold 33 and the parallel leg of the part 9 is dimensioned such that it essentially corresponds to the distance between the two contact elements 8 of the overvoltage protection element 2.
  • the contact elements 8 are inserted through lateral openings 35 in the terminal block housing 10, their ends touch the top of the fold 33 and the underside of the leg of the part 9, with a spring element 6 being arranged at each point of contact so that the necessary contact forces are caused by the Spring legs 21 and 22 can be applied.
  • This arrangement of the overvoltage protection element 2 has the particular advantage that the busbar required for guiding the ground potential in the exemplary embodiment in FIG. 1 can be omitted in the exemplary embodiment in FIG. 3 if the mounting rail 3 is connected to the ground potential.
  • FIG. 4 shows a terminal block in which a contact element 8 of the overvoltage protection element 2 is electrically connected to a contact foot 30.
  • the contact foot 30 usually fulfills both the mechanical function of clamping the terminal block on the mounting rail 3 and also an electrical connection to the mounting rail 3, which in this application serves as the busbar carrying the earth potential.
  • the contact foot 30 has a contact tab 32 which is at an angle of 90 degrees to the upper side of the terminal block housing and which is simply touched laterally by one of the contact elements 8 of the overvoltage protection element 2.
  • the other contact element 8 touches one laterally at an angle from here to the A spring element 6 is arranged in each case for providing the contact force.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Thermistors And Varistors (AREA)

Abstract

In the case of this rail-mounted terminal assembly having two or more rail-mounted terminals (terminal blocks) (1) which are arranged side by side, overvoltage protection devices (2) are used whose contact elements (8) make contact on one side with the busbar (4) of the rail-mounted terminal and on the other side make contact with a busbar (5) which passes through the rail-mounted terminal assembly. Spring elements (6) which, if required, can be arranged separately in the insulating material housing of the rail-mounted terminals, and which make contact directly, are now provided in order to make contact in this way. <IMAGE>

Description

Die Erfindung betrifft eine Reihenklemmenanordnung, bestehend aus 2 oder mehr Reihenklemmen mit eingesetzten Überspannungsschutzorganen und einer querverlaufenden Sammelschiene, wobei eine elektrische Verbindung der Kontaktelemente des Überspannungsschutzorgans einerseits mit der Stromschiene der jeweiligen Reihenklemme und andererseits mit der Sammelschiene besteht.The invention relates to a terminal block arrangement consisting of 2 or more terminal blocks with inserted overvoltage protection elements and a transverse busbar, with an electrical connection of the contact elements of the overvoltage protection element on the one hand to the busbar of the respective terminal block and on the other hand to the busbar.

Reihenklemmenanordnungen der gattungsgemäßen Art werden beispielsweise in Schaltschränken eingesetzt, um empfindliche elektronische Bauteile vor einer Zerstörung durch im elektrischen Leitungsnetz auftretende Überspannungsimpulse zu schützen. Beim Auftreten solcher Überspannungen werden diese mit Hilfe des Überspannungsschutzorgans einem vorhandenen Erdungspotential zugeführt, wobei das Schutzorgang unbrauchbar wird, so daß ein schädlicher Einfluß auf die an der Reihenklemme angeschlossenen elektrischen Bauteile ausgeschlossen wird. Nach Auftreten von Überspannungen verfärben sich üblicherweise die Gehäuse der Überspannungsschutzorgane und werden dann gegen intakte Organe ausgetauscht. Aus dem Katalog der Firma Fudji Electric sind Reihenklemmen mit Überspannungsschutzorganen bekannt, bei denen die Kontaktelemente der Überspannungsorgane in Halteelemente eingreifen, die elektrisch leitend sein müssen und die mit der Strom- bzw. Sammelschiene verbunden sind. Diese Halteelemente vereinigen folglich eine mechanische Haltefunktion sowie eine elektrische Übertragungfunktion in einem Bauteil. Dies hat den Nachteil, daß beispielsweise bei der Materialwahl für diese Bauteile funktionsbedingte Kompromisse eingegangen werden müssen. Darüber hinaus treten bei den Reihenklemmen gemäß dem Stand der Technik mehrere elektrische Kontaktübergänge auf, wobei bei jedem Kontaktübergang ein nachteiliger Übergangswiderstand vorhanden ist.Terminal block arrangements of the generic type are used, for example, in control cabinets in order to protect sensitive electronic components from being destroyed by overvoltage pulses occurring in the electrical supply network. If such overvoltages occur, they are supplied to an existing grounding potential with the aid of the overvoltage protection element, the protection circuit becoming unusable, so that a harmful influence on the electrical components connected to the terminal block is excluded. After the occurrence of overvoltages, the housing of the overvoltage protection elements usually change color and are then exchanged for intact elements. Terminal blocks with surge protection devices are known from the catalog of the Fudji Electric company, in which the contact elements of the Intervene overvoltage elements in holding elements, which must be electrically conductive and which are connected to the busbar. These holding elements consequently combine a mechanical holding function and an electrical transmission function in one component. This has the disadvantage that, for example in the choice of material for these components, function-related compromises have to be made. In addition, several electrical contact transitions occur in the terminal blocks according to the prior art, with each contact transition having an adverse contact resistance.

Aufgabe der vorliegenden Erfindung ist es daher, eine Reihenklemmenanordnung der gattungsgemäßen Art zu schaffen, die bei niedrigen Herstellkosten durch ihren Aufbau besonders günstige elektrische Eigenschaften besitzt.The object of the present invention is therefore to create a terminal block arrangement of the generic type which, due to its construction, has particularly favorable electrical properties at low manufacturing costs.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zur elektrischen Verbindung der Kontaktelemente des Überspannungsschutzes direkt kontaktierende Federelemente vorgesehen sind.This object is achieved in that directly contacting spring elements are provided for the electrical connection of the contact elements of the overvoltage protection.

Der direkte Kontakt der Kontaktelemente zur Stromschiene bzw. zur Sammelschiene spart je nach Bauart herkömmlicher Reihenklemmenanordnungen der gattungsgemäßen Art mindestens zwei Stromübergangsstellen ein, d.h. es entfallen zwei Stromübergangswiderstände. Die für die elektrische Kontaktierung verwendeten Federelemente haben nur noch die rein mechanische Funktion, die für einen guten Stromübergang zwischen den Kontaktelementen und der Sammel- bzw. Stromschiene notwendige Kontaktkraft bereitzustellen. Bei der Materialauswahl für diese Federelemente kann man sich folglich ganz auf die optimalen Federeigenschaften für die verwendeten Federelemente konzentrieren. Zusätzlich trägt der nicht vorhandene Stromdurchfluß durch die Federelemente dazu bei, Alterungserscheinungen des Werkstoffmaterials, die sich infolge der durch den Stromdurchfluß hervorgerufenen Erwärmung ergeben können, auszuschließen. Dies ist insbesondere dort von Bedeutung, wo die Zeitintervalle, die zwischen dem Austausch von Überspannungsschutzorganen liegen, relativ lang sind.The direct contact of the contact elements to the busbar or to the busbar saves at least two current transfer points, depending on the design of conventional terminal block arrangements of the generic type, ie two current transfer resistors are omitted. The spring elements used for electrical contacting only have the purely mechanical function of providing the contact force necessary for good current transfer between the contact elements and the busbar or busbar. When choosing the material for these spring elements, you can rely entirely on the Focus optimal spring properties for the spring elements used. In addition, the non-existent flow of current through the spring elements helps to prevent the material material from showing signs of aging, which may result from the heating caused by the flow of current. This is particularly important where the time intervals between the replacement of surge protective devices are relatively long.

Der erfindungsgemäße Aufbau der Reihenklemmen ist ferner unter dem Gesichtspunkt der Herstellung und der Montage als besonders kostengünstig anzusehen, da nur noch zwei einfach herzustellenden Federelemente notwendig sind, die im Rahmen der Reihenklemmenmontage nur ohne zusätzliche Anschlußarbeiten in das Gehäuse eingelegt werden. Hieraus ergibt sich zusätzlich der Vorteil, daß durch Nachrüsten von Reihenklemmen mit zwei Federelementen, einer Sammelschiene und einem Überspannungsschutzorgan auf einfache Weise die Funktion der Reihenklemme verändert bzw. erweitert werden kann. Das Einlegen der Federelemente kann in flexibler Weise grundsätzlich aus beliebiger Richtung geschehen.The construction of the terminal blocks according to the invention is also to be regarded as particularly cost-effective from the point of view of manufacture and assembly, since only two spring elements that are simple to produce are required, which are inserted into the housing without additional connection work as part of the terminal block assembly. This also has the advantage that the function of the terminal block can be changed or expanded in a simple manner by retrofitting terminal blocks with two spring elements, a busbar and a surge protection device. The insertion of the spring elements can basically be done from any direction in a flexible manner.

Spezielle Ausgestaltungen des Gegenstandes der Erfindung ergeben sich aus den Merkmalen der Unteransprüche.Special configurations of the subject matter of the invention result from the features of the subclaims.

Da Reihenklemmen üblicherweise innerhalb von Schaltschränken auf genormten Tragschienen festgelegt sind, läßt sich für den Anwendungsfall, daß diese Tragschienen auch als die das Erdungspotential führende Sammelschienen verwendet wird, die Kontaktierung mittels eines Federlementes mit dem dann in der Reihenklemme vorhandenen, mit der Sammelschiene elektrisch leitend verbundenen Kontaktfuß durchführen. Die Bauweise der Federelemente in Gestalt eines U-förmigen Grundkörpers mit zwei sich gegenüberliegenden einseitig verlängerten Federschenkeln, die an ihrem dem Grundkörper abgewandten freien Ende konvex zueinander gewölbt sind, erfüllt auf besonders einfache und preiswerte Weise den Zweck des Federelementes, eine ausreichende Kontaktkraft bereitzustellen.Since terminal blocks are usually fixed within control cabinets on standardized mounting rails, it can be used for the application that these mounting rails are also used as the busbars carrying the earthing potential, the contacting by means of a spring element with the then Carry out the contact foot in the terminal block that is electrically connected to the busbar. The design of the spring elements in the form of a U-shaped base body with two opposing one-sided elongated spring legs, which are convexly curved at their free end facing away from the base body, fulfills the purpose of the spring element in a particularly simple and inexpensive manner to provide sufficient contact force.

Im folgenden werden anhand der beigefügten Zeichnungen einige Ausführungsbeispiele des Gegenstandes der Erfindung näher beschrieben. Es zeigen:

Fig. 1
einen Querschnitt durch eine Reihenklemme einer erfindungsgemäßen Reihenklemmenanordnung
Fig. 2
vergrößerte perspektivische Darstellung eines Stromschienenstücks der Reihenklemme aus Fig. 1 mit eingelegtem Federelement
Fig. 3
Beispiel einer erfindungsgemäßen Reihenklemmenanordnung mit direkter Kontaktierung der Tragschiene
Fig. 4
eine erfindungsgemäße Reihenklemmenanordnung mit Schutzleiteranschluß
Die erfindungsgemäße Reihenklemmenanordnung besteht aus mehreren nebeneinander mit Hilfe von Rastfüßen 18 und 19 auf einer Tragschiene 3 festgelegten Reihenklemmen 1. In dem aus Kunststoff gefertigten Reihenklemmengehäuse 10 ist eine Stromschiene 4 angeordnet, die an beiden Enden mit Schraubanschlüssen 12 versehen ist, an die beidseitig je ein durch die Einführöffnung 11 zugeführter Leiter angeschlossen werden kann. An der Oberseite des Reihenklemmengehäuses 10 befindet sich eine Ausnehmung, die Platz für ein Überspannungsorgan 2 bietet. Das Überspannungsorgan 2, z.B. ein Varistor, besitzt eine runde plättchenförmige Gestalt, an seiner Unterseite stehen zwei im parallelen Abstand zueinander angeordnete Kontaktelemente 8 hervor. Unterhalb des Überspannungsschutzorgans 2 befindet sich im Innern des Reihenklemmengehäuses 10 eine Sammelschiene 5, die üblicherweise sich senkrecht zur Zeichenebene durch mehrere auf der Tragschiene 3 nebeneinander angeordnete Reihenklemmen 1 erstreckt. Durch die Anordnung der Sammelschiene 5 über der Stromschiene 4 ist es möglich, diese nach Montage der Reihenklemmen z.B auf der Tragschiene 3 von oben in die Reihenklemmen einsetzen und bei Bedarf entfernen zu können. Die Sammelschiene 5 ist durch eine Kappe 15 von oben abgedeckt, die mit dem Reihenklemmengehäuse 10 durch eine Nase 16 verrastet ist.Some exemplary embodiments of the subject matter of the invention are described in more detail below with reference to the accompanying drawings. Show it:
Fig. 1
a cross section through a terminal block of a terminal block arrangement according to the invention
Fig. 2
enlarged perspective view of a busbar piece of the terminal block from FIG. 1 with inserted spring element
Fig. 3
Example of a terminal block arrangement according to the invention with direct contacting of the mounting rail
Fig. 4
a terminal block arrangement according to the invention with protective conductor connection
The terminal block arrangement according to the invention consists of a plurality of terminal blocks 1 which are fixed next to one another with the aid of latching feet 18 and 19 on a mounting rail 3. A busbar 4 is arranged in the plastic terminal block housing 10 and is provided at both ends with screw terminals 12, one on each side connected through the insertion opening 11 conductor can be. At the top of the terminal block housing 10 there is a recess that offers space for a surge element 2. The overvoltage element 2, for example a varistor, has a round, plate-like shape, on its underside two projecting contact elements 8 which are arranged at a parallel distance from one another. Below the overvoltage protection element 2 there is a busbar 5 in the interior of the terminal block housing 10, which usually extends perpendicular to the plane of the drawing through a plurality of terminal blocks 1 arranged next to one another on the mounting rail 3. The arrangement of the busbar 5 above the busbar 4 makes it possible to insert it into the terminal blocks from above after mounting the terminal blocks, for example on the mounting rail 3, and to remove them if necessary. The busbar 5 is covered by a cap 15 from above, which is locked to the terminal block housing 10 by a nose 16.

Die beiden Kontaktelemente 8 des Überspannungsschutzorgans 2 sind durch Gehäuseöffnungen 17 so in das Reihenklemmengehäuse 10 eingesteckt, daß ein Kontaktelement 8 die Sammelschiene 5 seitlich berührt und das andere Kontaktelement einen Schenkel der im Gehäuse U-förmig verlaufenden Stromschiene 4 berührt. Die mechanische Kontaktkraft zwischen Stromschiene 4, Sammelschiene 5 und den jeweiligen Kontaktelementen 8 wird durch Federelemente 6 erzeugt. Aus Figur 2 ist durch die vergrößerte perspektivische Darstellung eines Teils der Stromschiene 4, des Kontaktelementes 8 sowie des Federelementes 6 der Aufbau dieses Federelementes verdeutlicht.The two contact elements 8 of the overvoltage protection element 2 are inserted through housing openings 17 into the terminal block housing 10 in such a way that one contact element 8 touches the busbar 5 laterally and the other contact element touches one leg of the busbar 4 which runs in a U-shaped manner in the housing. The mechanical contact force between busbar 4, busbar 5 and the respective contact elements 8 is generated by spring elements 6. The structure of this spring element is illustrated in FIG. 2 by the enlarged perspective representation of part of the busbar 4, the contact element 8 and the spring element 6.

Das Federelement 6 besitzt einen U-förmig gestalteten Grund körper 20, der die Stromschiene 4 einseitig umgreift. Die beiden Schenkel des U-förmigen Grundkörpers 20 sind einseitig nach oben verlängert und bilden die Federschenkel 21 und 22. Die dem Grundkörper abgewandten, nach oben gerichteten freien Enden der Federschenkel 21 und 22 sind an ihrem Ende konvex zueinander gewölbt, so daß sich zwischen den einander zugewandten Flächen der Federschenkel 21 und 22 aufgrund der Wölbung ein geringerer Abstand ergibt als der der beiden Schenkel im Bereich des Grundkörpers 20. Die Außenwölbungen der Federschenkel 21 und 22 bilden somit zwei Kontaktflächen 23 und 24, zwischen denen die nebeneinander angeordnete Stromschiene 4 und ein Kontaktelement 8 des Überspannungsschutzorgans 2 gegeneinander gedrückt werden. Durch die Tatsache, daß das äußerste freie Ende des Federschenkels 22, der sich in direktem Kontakt mit dem Kontaktelement 8 befindet, von der Stromschiene 4 weg nach außen gewölbt ist, wird bei einem eventuell notwendigen Auswechseln des Überspannungsschutzorgans 2 ein Einschieben des Kontaktelementes 8 zwischen die Kontaktfläche 23 und die Stromschiene 4 erleichtert. Die Federlemente 6 können aus Metall hergestellt werden, es ist jedoch ebenso gut denkbar, die besonderen elastischen Eigenschaften bestimmter Kunststoffe für die Bereitstellung der notwendigen Kontaktkraft zu nutzen.The spring element 6 has a U-shaped base body 20, which engages around the busbar 4 on one side. The two legs of the U-shaped base body 20 are extended on one side upwards and form the spring legs 21 and 22. The free ends of the spring legs 21 and 22 facing away from the base body are curved convexly at their ends, so that there is a gap between them mutually facing surfaces of the spring legs 21 and 22 due to the curvature results in a smaller distance than that of the two legs in the area of the base body 20. The outer curvatures of the spring legs 21 and 22 thus form two contact surfaces 23 and 24, between which the busbar 4 and 1 arranged next to one another Contact element 8 of the surge protector 2 are pressed against each other. Due to the fact that the outermost free end of the spring leg 22, which is in direct contact with the contact element 8, is arched away from the busbar 4, when the overvoltage protection element 2 is possibly necessary, the contact element 8 is inserted between the Contact surface 23 and the busbar 4 facilitated. The spring elements 6 can be made of metal, but it is equally conceivable to use the special elastic properties of certain plastics to provide the necessary contact force.

In Figur 3 ist eine Bauvariante einer Reihenklemme mit Überspannungsschutzorgan dargestellt, bei der das Überspannungsschutzorgan 2 nicht in einer Ausnehmung an der Oberseite des Reihenklemmengehäuses 10 angeordnet ist, sondern sich seitlich neben dem Gehäuse befindet. Die Stromschiene 4 ist in diesem Ausführungsbeispiel ebenfalls mit zwei Klemmenanschlüssen 12 versehen und geradlinig von einer Seite zur andern Seite des Reihenklemmengehäuses 10 geführt. Die Stromschiene 4 besitzt einen U-förmig in Richtung der Tragschiene nach unten gebogenen Teil 9, wobei ein Schenkel des U-förmigen Teils parallel zu waagerechten Umkantungen 33 der Tragschiene 3 ausgerichtet ist. Der Abstand der Umkantung 33 und des parallelen Schenkels des Teils 9 ist so bemessen, daß er im wesentlichen dem Abstand der beiden Kontaktelemente 8 des Überspannungsschutzorganes 2 entspricht. Die Kontaktelemente 8 sind durch seitliche Öffnungen 35 in das Reihenklemmengehäuse 10 eingeschoben, berühren mit ihren Enden die Oberseite der Abkantung 33 sowie die Unterseite des Schenkels des Teiles 9, wobei an jeder Berührungsstelle je ein Federelement 6 so angeordnet ist, daß die notwendigen Kontaktkräfte durch die Federschenkel 21 und 22 aufgebracht werden können. Diese Anordnung des Überspannungsschutzorganes 2 hat insbesondere den Vorteil, daß die im Ausführungsbeispiel der Figur 1 notwendige Sammelschiene zur Führung des Erdungspotentials bei dem Ausführungsbeispiel der Figur 3 entfallen kann, falls die Tragschiene 3 an das Erdungs-potential angeschlossen ist.FIG. 3 shows a construction variant of a terminal block with overvoltage protection element, in which the overvoltage protection element 2 is not arranged in a recess on the top of the terminal block housing 10, but is located on the side next to the housing. In this exemplary embodiment, the busbar 4 is likewise provided with two terminal connections 12 and is guided in a straight line from one side to the other side of the terminal block housing 10. The Busbar 4 has a U-shaped part 9 bent downward in the direction of the mounting rail, one leg of the U-shaped part being aligned parallel to horizontal folds 33 of mounting rail 3. The distance between the fold 33 and the parallel leg of the part 9 is dimensioned such that it essentially corresponds to the distance between the two contact elements 8 of the overvoltage protection element 2. The contact elements 8 are inserted through lateral openings 35 in the terminal block housing 10, their ends touch the top of the fold 33 and the underside of the leg of the part 9, with a spring element 6 being arranged at each point of contact so that the necessary contact forces are caused by the Spring legs 21 and 22 can be applied. This arrangement of the overvoltage protection element 2 has the particular advantage that the busbar required for guiding the ground potential in the exemplary embodiment in FIG. 1 can be omitted in the exemplary embodiment in FIG. 3 if the mounting rail 3 is connected to the ground potential.

In Figur 4 ist eine Reihenklemme dargestellt, bei der ein Kontaktelement 8 des Überspannungschutzorganes 2 mit einem Kontaktfuß 30 elektrisch verbunden ist. Der Kontaktfuß 30 erfüllt üblicherweise sowohl die mechanische Funktion der Festklemmung der Reihenklemme auf der Tragschiene 3 wie auch die einer elektrischen Verbindung mit der Tragschiene 3, die in diesem Anwendungsfall als die das Erdpotential führende Sammelschiene dient. Wie die Figur 4 zeigt, besitzt der Kontaktfuß 30 eine im Winkel von 90 Grad zur Oberseite des Reihenklemmengehäuses hochstehende Kontaktlasche 32, die in einfacher Weise von einem der Kontaktelemente 8 des Überspannungsschutzorganes 2 seitlich berührt wird. Das andere Kontaktelement 8 berührt seitlich einen im Winkel von auch hier an den Kontaktstellen je ein Federelement 6 zur Bereitstellung der Kontaktkraft angeordnet.FIG. 4 shows a terminal block in which a contact element 8 of the overvoltage protection element 2 is electrically connected to a contact foot 30. The contact foot 30 usually fulfills both the mechanical function of clamping the terminal block on the mounting rail 3 and also an electrical connection to the mounting rail 3, which in this application serves as the busbar carrying the earth potential. As FIG. 4 shows, the contact foot 30 has a contact tab 32 which is at an angle of 90 degrees to the upper side of the terminal block housing and which is simply touched laterally by one of the contact elements 8 of the overvoltage protection element 2. The other contact element 8 touches one laterally at an angle from here to the A spring element 6 is arranged in each case for providing the contact force.

Claims (5)

Reihenklemmenanordnung, bestehend aus zwei oder mehr Reihenklemmen mit eingesetzten Überspannungsschutzorganen und einer querverlaufenden Sammelschiene, wobei eine elektrische Verbindung der Kontaktelemente des Überspannungsschutzorganes einerseits mit der Stromschiene der jeweiligen Reihenklemme und andererseits mit der Sammelschiene besteht, dadurch gekennzeichnet, daß zur elektrischen Verbindung der Kontaktelemente (8) des Überspannungsschutzorganes (2) direkt kontaktierende Federelemente (6) vorgesehen sind.Terminal block arrangement, consisting of two or more terminal blocks with inserted surge protection devices and a transverse busbar, with an electrical connection of the contact elements of the surge protection device on the one hand to the busbar of the respective terminal block and on the other hand to the busbar, characterized in that for the electrical connection of the contact elements (8) of the overvoltage protection element (2) directly contacting spring elements (6) are provided. Reihenklemmenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Federelemente (6) im Bereich der Strom- und Sammelschienen seperat im Isolierstoffgehäuse der Reihenklemmen angeordnet sind.Terminal block arrangement according to Claim 1, characterized in that the spring elements (6) are arranged separately in the insulating housing of the terminal blocks in the region of the busbars and busbars. Reihenklemmenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Federelemente (6) einen U-förmigen Grundkörper (20) mit zwei sich gegenüberliegenden, einseitig verlängerten Federschenkeln (21,22) aufweisen, die an ihrem dem Grundkörper (20) abgewandten freien Enden konvex zueinander gewölbt sind.Terminal block arrangement according to claim 1, characterized in that the spring elements (6) have a U-shaped base body (20) with two opposite, one-sidedly elongated spring legs (21, 22) which are convex to one another at their free ends facing away from the base body (20) are arched. Reihenklemmenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß eine Tragschiene 3 die das Erdungspotential führende Sammelschiene bildet, darauf ein Kontaktfuß (30) festgelegt ist und ein Kontaktelement (8) mittels eines Federelementes (6) den Kontaktfuß (30) direkt kontaktiert.Terminal block arrangement according to Claim 1, characterized in that a mounting rail 3 which forms the busbar carrying the ground potential, a contact foot (30) is fixed thereon and a contact element (8) makes direct contact with the contact foot (30) by means of a spring element (6). Reihenklemmenanordnung nach einem oder mehreren der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß das Federelement (6) zur direkten Kontaktierung von Überspannungsschutzorgan (2) und Sammelschiene (5) in der Anschlußebene der Reihenklemme (1) angeordnet ist.Terminal block arrangement according to one or more of the preceding claims, characterized in that the spring element (6) for direct contacting of the overvoltage protection element (2) and busbar (5) is arranged in the connection plane of the terminal block (1).
EP94106796A 1993-07-30 1994-04-30 Rail-mounted terminal assembly with overvoltage protection devices Expired - Lifetime EP0637099B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4325614 1993-07-30
DE4325614A DE4325614C2 (en) 1993-07-30 1993-07-30 Terminal block arrangement with surge protective devices

Publications (3)

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EP0637099A2 true EP0637099A2 (en) 1995-02-01
EP0637099A3 EP0637099A3 (en) 1996-07-03
EP0637099B1 EP0637099B1 (en) 1998-03-18

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ID=6494081

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EP94106796A Expired - Lifetime EP0637099B1 (en) 1993-07-30 1994-04-30 Rail-mounted terminal assembly with overvoltage protection devices

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US (1) US5411417A (en)
EP (1) EP0637099B1 (en)
AT (1) ATE164265T1 (en)
DE (2) DE4325614C2 (en)
ES (1) ES2113571T3 (en)

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Also Published As

Publication number Publication date
DE59405453D1 (en) 1998-04-23
DE4325614C2 (en) 1995-08-31
US5411417A (en) 1995-05-02
DE4325614A1 (en) 1995-02-02
ES2113571T3 (en) 1998-05-01
EP0637099B1 (en) 1998-03-18
EP0637099A3 (en) 1996-07-03
ATE164265T1 (en) 1998-04-15

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