EP0210126A1 - Coupling contact piece for a plug connection between two cylindrical conductors of a closed, gas pressure-insulated high voltage switching device - Google Patents

Coupling contact piece for a plug connection between two cylindrical conductors of a closed, gas pressure-insulated high voltage switching device Download PDF

Info

Publication number
EP0210126A1
EP0210126A1 EP86730112A EP86730112A EP0210126A1 EP 0210126 A1 EP0210126 A1 EP 0210126A1 EP 86730112 A EP86730112 A EP 86730112A EP 86730112 A EP86730112 A EP 86730112A EP 0210126 A1 EP0210126 A1 EP 0210126A1
Authority
EP
European Patent Office
Prior art keywords
conductor
contact piece
cylindrical
piece according
dome
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
EP86730112A
Other languages
German (de)
French (fr)
Other versions
EP0210126B1 (en
Inventor
Paul Dipl.-Ing. Oehlkers
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
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 filed Critical Siemens AG
Publication of EP0210126A1 publication Critical patent/EP0210126A1/en
Application granted granted Critical
Publication of EP0210126B1 publication Critical patent/EP0210126B1/en
Expired legal-status Critical Current

Links

Images

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
    • 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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/60—Connections between or with tubular conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals

Definitions

  • the invention relates to a coupling contact piece for a plug connection between two cylindrical conductors of an encapsulated, pressurized gas-insulated high-voltage switchgear, in which a cylindrical sleeve with elongated contact blades covers two spherical contact parts connected to the conductor ends, which are fastened in a recess in the conductor by means of a cylindrical projection.
  • Such a dome contact piece is known from DE-AS 27 13 121. It is customary for these dome contact pieces, provided the cylindrical conductor and the spherical contact parts are made of copper, to solder the outer surface of the cylindrical extension of the dome contact part to the surface of the recess in the conductor. Soldering is expensive and its quality is difficult to check.
  • the invention has for its object to achieve a perfect galvanic contact between the approach of the spherical contact parts and the conductor end with simpler means.
  • each spherical contact part is fitted with a press fit into the tubular end of the conductor in a dome contact piece of the type described above according to the invention.
  • This arrangement has the advantage that the outer surface of the cylindrical projection of the spherical contact parts can be used as a seat for the press fit which can be produced simply and cheaply.
  • the press fit thus results in good galvanic contact between the conductor and the spherical contact parts along the entire circumference. The quality of the press fit and thus the contact is easy to check.
  • a support ring made of impermeable material of higher mechanical strength in the area of the inner seat surface to the conductor which can be done by pressing or shrinking. A correspondingly higher seat strength can thereby be achieved.
  • the assembly of the dome contact piece can be simplified according to the further invention in that the press fit is not produced by appropriate dimensioning of the seat surfaces, but is generated with the aid of a spreading device provided on the cylindrical projection.
  • This facilitates the insertion of the contact part into the tubular end of the conductor provided for the press fit.
  • the cylindrical projection and the spherical contact part have a central bore, starting from a recess of larger diameter, which is penetrated by an expansion screw, the head of which lies in the recess and a cone is screwed onto the end of which.
  • the cone is then drawn into the central bore of the contact part and expands the cylindrical projection, so that when the screwing process is completed, the contact part is pressed inside the tubular end of the conductor.
  • the completion of the pressing process is indicated by the freedom of movement of the thread.
  • FIG. 1 shows a longitudinal section through a dome contact piece designed according to the invention.
  • Figure 2 a somewhat modified spherical contact part is also shown in longitudinal section.
  • the dome contact piece 1 for the connection of two cylindrical conductors 2 made of aluminum of a compressed gas-insulated, metal-encapsulated high-voltage switchgear consists of two spherical contact parts 3, which are connected to the ends of the conductors 2, and a cylindrical sleeve 4, which covers the spherical contact parts 3, with elongated contact lamellae 5.
  • the front outer edges 6 as well as the edges 7 next to a constriction 8 for receiving a fuse spring 9 are very rounded, so that the cylindrical sleeve 4 simultaneously acts as a shield controlling the electrical field in the course of the conductor connection.
  • the inside diameter of the cylindrical sleeve 4 is smaller in the region of the constriction 8 than the inside diameter indicated by an arrow 10 for receiving the current contact plates 5, so that a shoulder 11 is formed between the two, against which the contact plates 5 rest on one side.
  • Each contact lamella 5 is trapezoidal.
  • the pointed side 12 of the contact plate 5 forms the contact surface with the spherical contact parts 3 attached to the ends of the conductors 2 to be connected.
  • the blunt side of the contact plates 5 facing the cylindrical sleeve 4 contains a central groove 13, in each of which a leaf spring 14 is arranged , which supports the contact plate 5 with respect to the cylindrical sleeve 4 and thus causes the contact pressure of the contact plate 5.
  • the leaf springs 14 are laterally secured by a disc 15 in the axial direction, which is fixed at some points in the cylindrical sleeve 4 by caulking.
  • the ends of the conductors 2 made of aluminum are tubular.
  • a cylindrical extension 17 of the spherical contact part 3 is inserted, the outer diameter of which corresponds approximately to the inner diameter of the recess 16.
  • the spherical contact part 3 and the cylindrical extension 17 are formed in one piece and consist of a copper alloy.
  • a central recess 19 extends from the end face 18 of the spherical contact part 3, into the bottom 20 of which a central bore 21 of smaller diameter opens, which leads to the other end face 22.
  • the central bore 21 is penetrated by an expansion screw 24, the head 25 of which rests on the bottom 20 of the recess 19 and is thus inside the spherical contact part 3.
  • a cone 26 is screwed on from the end of the expansion screw 24.
  • the expansion screw 24 with the cone 26 is already in the spherical connector 3 before it is inserted with its cylindrical extension 17 into the recess 16 of the conductor 2.
  • the shoulder 17 is provided adjacent to the spherical contact part 3 with a shoulder 27 with a larger diameter than the outer lateral surface and thus the seat surface 28 of the cylindrical shoulder 17. This shoulder 27 bears against the end face 29 of the conductor 2 and acts as a stop which determines the axial position of the spherical contact part 3.
  • the cone 26 is now drawn into the central bore 21 and thus spreads the cylindrical extension 17 over the surface 23 adjacent to the end face 22, so that a press fit is produced on the seat surface 28.
  • FIG. 2 shows another configuration of the press fit between the spherical contact part 3 and the tubular end of the conductor 2 made of aluminum.
  • the same reference numerals are used for parts that correspond to those in FIG. 1.
  • the spherical contact part 3 is provided with a cylindrical projection 17 which extends into the recess 16 of the end of the conductor 2 protrudes.
  • the cylindrical extension 17 is intended to cause a press fit in the area of the seat surface 28.
  • the inner diameter of the conductor 2 and the outer diameter of the extension 17 are dimensioned in accordance with the seat tolerances required for this.
  • the shoulder 17 is provided with knurling in the area of the seat surface 28. This ensures that when the cylindrical projection 17 is pressed into the recess 16 of the aluminum conductor 2, the oxide layers are rubbed off both on the inner surface of the tubular aluminum conductor 2 and on the seat surface 28 of the projection 17, so that a very good galvanic connection between both parts are created.
  • the extension 17 is provided on its end face 22 with a guide part 30, the outside diameter of which is smaller than the outside diameter of the seat surface 28.
  • both the shoulder 27, which comes to rest on the end face 29 of the conductor 2, and a locking toothing 31, which lies between the shoulder 27 and the seat surface 28, are provided for axial fixing.
  • a support ring 32 made of non-permeable material of higher mechanical strength, such as. B. stainless steel, shrunk, which is arranged in the region of the inner seat 28. This allows a higher seating strength to be achieved even with a small wall thickness of the tubular end of the aluminum conductor 2.

Landscapes

  • Installation Of Bus-Bars (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

1. Coupling contact piece (1) for a plug connection between two cylindrical conductors (2) of an encapsulated, pressure-gas-insulated high-voltage switching installation, in which a cylindrical sleeve (4) with elongate contact laminations (5) covers two ball-shaped contact portions (3) which are connected with the conductor ends and which are each secured by means of a cylindrical extension (17) in a recess (16) of the conductor (2), characterised in that the cylindrical extension (17) of each ball-shaped contact portion (3) is secured by means of a press fit in the tubular end of the pertinent conductor (2).

Description

Die Erfindung bezieht sich auf ein Kuppelkontaktstück für eine Steckverbindung zwischen zwei zylindrischen Leitern einer gekapselten, druckgasisolierten Hochspannungsschaltan­lage, bei dem eine zylindrische Muffe mit länglichen Kontaktlamellen zwei mit den Leiterenden verbundene kuglige Kontaktteile überdeckt, die mittels eines zylindrischen Ansatzes in einer Aussparung des Leiters befestigt sind.The invention relates to a coupling contact piece for a plug connection between two cylindrical conductors of an encapsulated, pressurized gas-insulated high-voltage switchgear, in which a cylindrical sleeve with elongated contact blades covers two spherical contact parts connected to the conductor ends, which are fastened in a recess in the conductor by means of a cylindrical projection.

Ein derartiges Kuppelkontaktstück ist aus der DE-AS 27 13 121 bekannt. Es ist bei diesen Kuppelkontaktstücken üblich, sofern der zylindrische Leiter und die kugligen Kontakteile aus Kupfer bestehen, die Mantelfläche des zylindrischen An­satzes des Kuppelkontaktreiles mit der Fläche der Aussparung des Leiters zu verlöten. Eine Verlötung ist teuer und hin­sichtlich ihrer Qualität schlecht nachprüfbar.Such a dome contact piece is known from DE-AS 27 13 121. It is customary for these dome contact pieces, provided the cylindrical conductor and the spherical contact parts are made of copper, to solder the outer surface of the cylindrical extension of the dome contact part to the surface of the recess in the conductor. Soldering is expensive and its quality is difficult to check.

Außerdem ist eine derartige Verlötung nicht möglich, wenn der zylindrische Leiter aus Aluminiumrohr besteht. In diesem Fall ist es üblich, die galvanische Kontaktierung zwischen dem kugligen Kontaktteil und dem Leiterende mittels einer mit Schrauben erzeugten Flächenpressung an der Stirnfläche des zylindrischen Aluminiumrohres, die zuvor spritzverkup­fert wurde, herzustellen. Dies ist verhältnismäßig aufwendig.In addition, such a soldering is not possible if the cylindrical conductor consists of aluminum tube. In this case, it is customary to produce the galvanic contact between the spherical contact part and the conductor end by means of a surface pressure generated with screws on the end face of the cylindrical aluminum tube, which was previously spray-copper-plated. This is relatively expensive.

Der Erfindung liegt die Aufgabe zugrunde, einen einwandfrei­en galvanischen Kontakt zwischen dem Ansatz der kugligen Kontaktteile und dem Leiterende mit einfacheren Mitteln zu erreichen.The invention has for its object to achieve a perfect galvanic contact between the approach of the spherical contact parts and the conductor end with simpler means.

Zur Lösung dieser Aufgabe ist bei einem Kuppelkontaktstück der eingangs beschriebenen Art gemäß der Erfindung der zylindrische Ansatz jedes kugligen Kontaktteiles mit einem Preßsitz in das rohrförmige Ende des Leiters eingepaßt. Diese Anordnung hat den Vorteil, daß die Mantelfläche des zylindrischen Ansatzes der kugligen Kontaktteile als Sitz­fläche für den einfach und billig herzustellenden Preßsitz ausgenutzt werden kann. Der Preßsitz ergibt somit längs des gesamten Umfanges einen guten galvanischen Kontakt zwischen dem Leiter und den kugligen Kontaktteilen. Die Qualität des Preßsitzes und somit des Kontaktes ist leicht nachprüfbar.To achieve this object, the cylindrical projection of each spherical contact part is fitted with a press fit into the tubular end of the conductor in a dome contact piece of the type described above according to the invention. This arrangement has the advantage that the outer surface of the cylindrical projection of the spherical contact parts can be used as a seat for the press fit which can be produced simply and cheaply. The press fit thus results in good galvanic contact between the conductor and the spherical contact parts along the entire circumference. The quality of the press fit and thus the contact is easy to check.

Dieser Vorteil ist besonders wichtig, wenn der Leiter aus Aluminium besteht und eine Lötung nicht möglich wäre.This advantage is particularly important if the conductor is made of aluminum and soldering would not be possible.

Es ist vorteilhaft, die Sitzfläche des Preßsitzes auf dem zylindrischen Ansatz mit einer Rändelung zu versehen. Dadurch erreicht man, daß während des Einpreßvorganges Oxid­schichten sowohl auf der Innenfläche des rohrförmigen Aluminiumleiters als auch auf der äußeren Mantelfläche des Ansatzes der Kontaktteile beseitigt werden, so daß die galvanische Verbindung verbessert ist.It is advantageous to provide the seat of the press fit on the cylindrical extension with knurling. It is thereby achieved that during the pressing-in process, oxide layers on both the inner surface of the tubular aluminum conductor and on the outer lateral surface of the attachment of the contact parts are eliminated, so that the galvanic connection is improved.

Weiterhin empfiehlt es sich, zwischen der Sitzfläche und der Stirnfläche des Leiters eine Sperrverzahnung vorzusehen, durch die sich der Einpreßkontakt fixieren läßt.Furthermore, it is advisable to provide a locking toothing between the seat surface and the end face of the conductor, by means of which the press-in contact can be fixed.

Weiterhin kann es bei geringer Wandstärke des rohrförmigen Endes des Leiters zweckmäßig sein, auf den Leiter einen Stützring aus nicht permeablen Material höherer mechanischer Festigkeit im Bereich der inneren Sitzfläche aufzubringen, was durch Pressung oder Schrumpfung erfolgen kann. Dadurch läßt sich eine entsprechend höhere Sitzfestigkeit erreichen.Furthermore, with a small wall thickness of the tubular end of the conductor, it may be expedient to apply a support ring made of impermeable material of higher mechanical strength in the area of the inner seat surface to the conductor, which can be done by pressing or shrinking. A correspondingly higher seat strength can thereby be achieved.

Die Montage des Kuppelkontaktstückes läßt sich gemäß der weiteren Erfindung noch dadurch vereinfachen, daß der Preß­sitz nicht durch eine entsprechende Bemessung der Sitz­flächen hergestellt wird, sondern mit Hilfe einer am zylin­drischen Ansatz vorgesehenen Spreizvorrichtung erzeugt ist. Dies erleichtert das Einführen des Kontaktteils in das für den Preßsitz vorgesehene rohrförmige Ende des Leiters. Für diesen Zweck empfiehlt es sich, daß der zylindrische Ansatz und der kuglige Kontaktteil eine von einer Aussparung größe­ren Durchmessers ausgehende Mittelbohrung aufweist, die von einer Dehnschraube durchsetzt ist, deren Kopf in der Ausspa­rung liegt und auf deren Ende ein Kegel aufgeschraubt ist. Zur Herstellung des Preßsitzes wird dann der Kegel in die Mittelbohrung des Kontaktteiles eingezogen und weitet den zylindrischen Ansatz, so daß bei Beendigung des Schraubvor­ganges eine Verpressung des Kontaktteiles im Innern des rohr­förmigen Endes des Leiters vorliegt. Die Beendigung des Preß­vorganges wird durch Freigängigkeit des Gewindes angezeigt.The assembly of the dome contact piece can be simplified according to the further invention in that the press fit is not produced by appropriate dimensioning of the seat surfaces, but is generated with the aid of a spreading device provided on the cylindrical projection. This facilitates the insertion of the contact part into the tubular end of the conductor provided for the press fit. For this purpose, it is recommended that the cylindrical projection and the spherical contact part have a central bore, starting from a recess of larger diameter, which is penetrated by an expansion screw, the head of which lies in the recess and a cone is screwed onto the end of which. To produce the press fit, the cone is then drawn into the central bore of the contact part and expands the cylindrical projection, so that when the screwing process is completed, the contact part is pressed inside the tubular end of the conductor. The completion of the pressing process is indicated by the freedom of movement of the thread.

Im folgenden sei die Erfindung noch anhand des in den Figuren 1 und 2 der Zeichnung dargestellten Ausführungsbei­spiels näher erläutert. Die Figur 1 zeigt einen Längsschnitt durch ein gemäß der Erfindung ausgebildetes Kuppelkontakt­stück. In Figur 2 ist ebenfalls im Längsschnitt ein etwas abgewandeltes kugliges Kontaktteil dargestellt.The invention will be explained in more detail below with reference to the exemplary embodiment shown in FIGS. 1 and 2 of the drawing. FIG. 1 shows a longitudinal section through a dome contact piece designed according to the invention. In Figure 2, a somewhat modified spherical contact part is also shown in longitudinal section.

Das Kuppelkontaktstück 1 für die Verbindung zweier zylin­drischer Leiter 2 aus Aluminium einer druckgasisolierten, metallgekapselten Hochspannungsschaltanlage besteht aus zwei kugligen Kontakteilen 3, die mit den Enden der Leiter 2 ver­bunden sind, und einer die kugligen Kontaktteile 3 über­deckenden zylindrischen Muffe 4 mit länglichen Kontakt­lamellen 5.The dome contact piece 1 for the connection of two cylindrical conductors 2 made of aluminum of a compressed gas-insulated, metal-encapsulated high-voltage switchgear consists of two spherical contact parts 3, which are connected to the ends of the conductors 2, and a cylindrical sleeve 4, which covers the spherical contact parts 3, with elongated contact lamellae 5.

Die stirnseitigen Außenkanten 6 ebenso wie die Kanten 7 neben einer Einschnürung 8 zur Aufnahme einer Sicherungs­ feder 9 sind stark abgerundet, so daß die zylindrische Muffe 4 gleichzeitig als eine das elektrische Feld steuernde Abschirmung im Zuge der Leiterverbindung wirkt. Der Innen­durchmesser der zylindrischen Muffe 4 ist im Bereich der Einschnürung 8 kleiner als der durch einen Pfeil 10 ange­deuteten Innendurchmesser zur Aufnahme der Stromkontakt­lamellen 5, so daß sich zwischen beiden ein Absatz 11 bildet, an dem die Kontaktlamellen 5 einseitig anliegen.The front outer edges 6 as well as the edges 7 next to a constriction 8 for receiving a fuse spring 9 are very rounded, so that the cylindrical sleeve 4 simultaneously acts as a shield controlling the electrical field in the course of the conductor connection. The inside diameter of the cylindrical sleeve 4 is smaller in the region of the constriction 8 than the inside diameter indicated by an arrow 10 for receiving the current contact plates 5, so that a shoulder 11 is formed between the two, against which the contact plates 5 rest on one side.

Jede Kontaktlamelle 5 ist trapezförmig ausgebildet. Die spitze Seite 12 der Kontaktlamelle 5 bildet die Kontakt­fläche zu den an den Enden der zu verbindenden Leiter 2 befestigten kugligen Kontaktteile 3. Die der zylindrischen Muffe 4 zugewandte stumpfe Seite der Kontaktlamellen 5 enthält eine mittige Nut 13, in der jeweils eine Blattfe­der 14 angeordnet ist, welche die Kontaktlamelle 5 gegenüber der zylindrischen Muffe 4 abstützt und somit den Kontakt­druck der Kontaktlamelle 5 hervorruft. Die Blattfedern 14 sind seitlich durch eine Scheibe 15 in axialer Richtung ge­sichert, die an einigen Stellen in der zylindrischen Muffe 4 durch Verstemmen festgelegt ist.Each contact lamella 5 is trapezoidal. The pointed side 12 of the contact plate 5 forms the contact surface with the spherical contact parts 3 attached to the ends of the conductors 2 to be connected. The blunt side of the contact plates 5 facing the cylindrical sleeve 4 contains a central groove 13, in each of which a leaf spring 14 is arranged , which supports the contact plate 5 with respect to the cylindrical sleeve 4 and thus causes the contact pressure of the contact plate 5. The leaf springs 14 are laterally secured by a disc 15 in the axial direction, which is fixed at some points in the cylindrical sleeve 4 by caulking.

Die Enden der Leiter 2 aus Aluminium sind rohrförmig ausge­bildet. In die mittlere Aussparung 16 der Leiter 2 ist je­weils ein zylindrischer Ansatz 17 des kugligen Kontakttei­les 3 eingeführt, dessen Außendurchmesser angenähert dem Innendurchmesser der Aussparung 16 entspricht. Das kuglige Kontaktteil 3 und der zylindrische Ansatz 17 sind einteilig ausgebildet und bestehen aus einer Kupferlegierung. Von der Stirnseite 18 des kugligen Kontaktteils 3 geht eine mittlere Aussparung 19 aus, in deren Boden 20 eine Mittelbohrung 21 kleineren Durchmessers mündet, die bis zur anderen Stirn­fläche 22 führt.The ends of the conductors 2 made of aluminum are tubular. In the middle recess 16 of the conductor 2, a cylindrical extension 17 of the spherical contact part 3 is inserted, the outer diameter of which corresponds approximately to the inner diameter of the recess 16. The spherical contact part 3 and the cylindrical extension 17 are formed in one piece and consist of a copper alloy. A central recess 19 extends from the end face 18 of the spherical contact part 3, into the bottom 20 of which a central bore 21 of smaller diameter opens, which leads to the other end face 22.

Die Mittelbohrung 21 ist von einer Dehnschraube 24 durch­setzt, deren Kopf 25 am Boden 20 der Aussparung 19 anliegt und sich somit im Innern des kugligen Kontaktteils 3 be­findet. Aus dem Ende der Dehnschraube 24 ist ein Kegel 26 aufgeschraubt. Die Dehnschraube 24 mit dem Kegel 26 befindet sich bereits in dem kugligen Anschlußstück 3, bevor diese mit seinem zylindrischen Ansatz 17 in die Aussparung 16 des Leiters 2 eingeführt wird. Zur axialen Festlegung des kugligen Kontaktteils 3 ist der Ansatz 17 benachbart zum kugligen Kontaktteil 3 mit einem Absatz 27 mit größerem Durchmesser als die äußere Mantelfläche und somit die Sitz­fläche 28 des zylindrischen Ansatzes 17 vorgesehen. Dieser Absatz 27 liegt gegen die Stirnfläche 29 des Leiters 2 an und wirkt als Anschlag, der die axiale Lage des kugligen Kontaktteils 3 bestimmt.The central bore 21 is penetrated by an expansion screw 24, the head 25 of which rests on the bottom 20 of the recess 19 and is thus inside the spherical contact part 3. A cone 26 is screwed on from the end of the expansion screw 24. The expansion screw 24 with the cone 26 is already in the spherical connector 3 before it is inserted with its cylindrical extension 17 into the recess 16 of the conductor 2. To axially fix the spherical contact part 3, the shoulder 17 is provided adjacent to the spherical contact part 3 with a shoulder 27 with a larger diameter than the outer lateral surface and thus the seat surface 28 of the cylindrical shoulder 17. This shoulder 27 bears against the end face 29 of the conductor 2 and acts as a stop which determines the axial position of the spherical contact part 3.

Durch Drehung der Dehnschraube 24 wird nun der Kegel 26 in die Mittelbohrung 21 hineingezogen und spreizt somit über die der Stirnfläche 22 benachbarte Fläche 23 den zylindri­schen Ansatz 17 auf, so daß an der Sitzfläche 28 ein Preß­sitz entsteht. Dieser ergibt einen guten galvanischen Kon­takt zwischen dem kugligen Kontaktteil 3 und dem Ende des Leiters 2 aus Aluminium. Auf diese Weise ist sichergestellt, daß die Stromführung vom Ende des einen Leiters 2 über den Ansatz 17 und dem kugligen Kontaktteil 3, sowie die Stromla­melle 5 auf das andere kuglige Kontaktteil 3, seinem An­satz 17 und auf das Ende des anderen Leiters 2 ohne unnötig große Widerstände an den einzelnen Berührungsstellen abläuft.By turning the expansion screw 24, the cone 26 is now drawn into the central bore 21 and thus spreads the cylindrical extension 17 over the surface 23 adjacent to the end face 22, so that a press fit is produced on the seat surface 28. This results in good galvanic contact between the spherical contact part 3 and the end of the conductor 2 made of aluminum. In this way it is ensured that the current supply from the end of one conductor 2 via the shoulder 17 and the spherical contact part 3, and the current lamella 5 to the other spherical contact part 3, its shoulder 17 and the end of the other conductor 2 without being unnecessarily large Resistance at the individual points of contact expires.

Die Figur 2 zeigt eine andere Ausbildung des Preßsitzes zwischen dem kugligen Kontaktteil 3 und dem rohrförmigen Ende des aus Aluminium bestehenden Leiters 2. Für Teile, die mit denen in Figur 1 übereinstimmen, sind die gleichen Be­zugszeichen beibehalten.FIG. 2 shows another configuration of the press fit between the spherical contact part 3 and the tubular end of the conductor 2 made of aluminum. The same reference numerals are used for parts that correspond to those in FIG. 1.

Auch hier ist der kuglige Kontaktteil 3 mit einem zylindri­schen Ansatz 17 versehen, der in die Aussparung 16 des Ende des Leiters 2 hineinragt. Der zylindrische Ansatz 17 soll im Bereich der Sitzfläche 28 einen Preßsitz hervorrufen. Ent­sprechend der dafür erforderlichen Sitztoleranzen sind der Innendurchmesser des Leiters 2 und der Außendurchmesser des Ansatzes 17 bemessen. Außerdem ist der Ansatz 17 im Bereich der Sitzfläche 28 mit einer Rändelung versehen. Dadurch wird erreicht, daß beim Einpressen des zylindrischen Ansatzes 17 in die Aussparung 16 des Leiters 2 aus Aluminium die Oxid­schichten sowohl auf der Innenfläche des rohrförmigen Aluminiumleiters 2 als auch auf der Sitzfläche 28 des An­satzes 17 abgerieben werden, so daß eine sehr gute galva­nische Verbindung zwischen beiden Teilen entsteht. Zur Er­leichterung der Einführung des zylindrischen Ansatzes 17 in die Aussparung 16 ist der Ansatz 17 an seiner Stirnseite 22 mit einem Führungsteil 30 versehen, dessen Außendurchmesser kleiner als der Außendurchmesser der Sitzfläche 28 ist. Außerdem ist zur axialen Festlegung sowohl der Absatz 27 vorgesehen, der an der Stirnfläche 29 des Leiters 2 zur Anlage gelangt, als auch eine Sperrverzahnung 31 vorgesehen, die zwischen dem Absatz 27 und der Sitzfläche 28 liegt.Here, too, the spherical contact part 3 is provided with a cylindrical projection 17 which extends into the recess 16 of the end of the conductor 2 protrudes. The cylindrical extension 17 is intended to cause a press fit in the area of the seat surface 28. The inner diameter of the conductor 2 and the outer diameter of the extension 17 are dimensioned in accordance with the seat tolerances required for this. In addition, the shoulder 17 is provided with knurling in the area of the seat surface 28. This ensures that when the cylindrical projection 17 is pressed into the recess 16 of the aluminum conductor 2, the oxide layers are rubbed off both on the inner surface of the tubular aluminum conductor 2 and on the seat surface 28 of the projection 17, so that a very good galvanic connection between both parts are created. To facilitate the insertion of the cylindrical extension 17 into the recess 16, the extension 17 is provided on its end face 22 with a guide part 30, the outside diameter of which is smaller than the outside diameter of the seat surface 28. In addition, both the shoulder 27, which comes to rest on the end face 29 of the conductor 2, and a locking toothing 31, which lies between the shoulder 27 and the seat surface 28, are provided for axial fixing.

Weiterhin ist außen auf dem rohrförmigen Ende des Aluminium­leiters 2 ein Stützring 32 aus nicht permeablen Material höherer mechanischer Festigkeit, wie z. B. Edelstahl, aufge­schrumpft, der im Bereich der inneren Sitzfläche 28 angeord­net ist. Dadurch läßt sich auch bei geringer Wandstärke des rohrförmigen Endes des Aluminiumleiters 2 eine höhere Sitzfestigkeit erreichen.Furthermore, on the tubular end of the aluminum conductor 2 is a support ring 32 made of non-permeable material of higher mechanical strength, such as. B. stainless steel, shrunk, which is arranged in the region of the inner seat 28. This allows a higher seating strength to be achieved even with a small wall thickness of the tubular end of the aluminum conductor 2.

Claims (8)

1. Kuppelkontaktstück (1) für eine Steckverbindung zwischen zwei zylindrischen Leitern (2) einer gekapselten, druckgasisolierten Hochspannungsschaltanlage, bei dem eine zylindrische Muffe (4) mit länglichen Kontaktlamellen (5) zwei mit den Leiterenden verbundene kuglige Kontaktteile (3) überdeckt, die mittels eines zylindrischen Ansatzes (17) in einer Aussparung (16) des Leiters (2) befestigt sind, dadurch gekennzeichnet, daß der zylindrische Ansatz (17) jedes kugligen Kontaktteiles (3) mit einem Preßsitz in das rohrförmige Ende des Leiters (2) eingepaßt ist.1.Dome contact piece (1) for a plug connection between two cylindrical conductors (2) of an encapsulated, pressurized gas-insulated high-voltage switchgear, in which a cylindrical sleeve (4) with elongated contact blades (5) covers two spherical contact parts (3) connected to the conductor ends, which by means of a cylindrical extension (17) are fixed in a recess (16) of the conductor (2), characterized in that the cylindrical extension (17) of each spherical contact part (3) is press-fitted into the tubular end of the conductor (2) . 2. Kuppelkontaktstück nach Anspruch 1, dadurch gekennzeichnet, daß die Leiter (2) aus Aluminium bestehen.2. Dome contact piece according to claim 1, characterized in that the conductors (2) consist of aluminum. 3. Kuppelkontaktstück nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Sitzfläche (28) des Preßsitzes auf dem zylindrischen Ansatz (17) mit einer Rändelung versehen ist.3. Dome contact piece according to claim 1 or 2, characterized in that the seat surface (28) of the press fit on the cylindrical projection (17) is provided with knurling. 4. Kuppelkontaktstück nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß zwischen der Sitzfläche (28) und der Stirnfläche (29) des Leiters (2) eine Sperrverzahnung (31) vorgesehen ist.4. Dome contact piece according to claim 1, 2 or 3, characterized in that a locking toothing (31) is provided between the seat surface (28) and the end face (29) of the conductor (2). 5. Kuppelkontaktstück nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß auf dem Leiter (2) ein Stützring (32) aus nicht permeablen Material höherer mechanischer Festigkeit im Bereich der inneren Sitzfläche (28) aufgebracht ist.5. Dome contact piece according to claim 1, 2 or 3, characterized in that on the conductor (2) a support ring (32) made of non-permeable material of higher mechanical strength in the region of the inner seat surface (28) is applied. 6. Kuppelkantaktstück nach Anspruch 1 oder 2,dadurch gekennzeichnet, daß der Preßsitz mit Hilfe einer am zylindrischen Ansatz (17) vorgesehenen Spreizvorrichtung erzeugt ist.6. Dome contact piece according to claim 1 or 2, characterized in that the press fit is generated with the aid of a spreading device provided on the cylindrical projection (17). 7. Kuppelkontaktstück nach Anspruch 6, dadurch gekennzeichnet, daß der zylindrische Ansatz und der kuglige Kontaktteil (3) eine von einer Aussparung (19) größeren Durchmessers ausgehende Mittelbohrung (21) aufweist, die von einer Dehnschraube (24) durchsetzt ist, deren Kopf (25) in der Aussparung (19) liegt und auf deren Ende ein Kegel (26) aufgeschraubt ist.7. Dome contact piece according to claim 6, characterized in that the cylindrical projection and the spherical contact part (3) has a central bore (21) extending from a recess (19) of larger diameter, which is penetrated by an expansion screw (24), the head ( 25) lies in the recess (19) and on the end of which a cone (26) is screwed. 8. Kuppelkontaktstück nach Anspruch 1, 2, 3 oder 6, dadurch gekennzeichnet, daß am zylindrischen Ansatz (17) benachbart zum kugligen Kontakt­teil (3) ein Absatz (27) mit größerem Durchmesser als die Sitzfläche (28) vorgesehen ist, der gegen die Stirnflä­che (29) des Leiters (2) anliegt.8. Dome contact piece according to claim 1, 2, 3 or 6, characterized in that a shoulder (27) with a larger diameter than the seat surface (28) is provided on the cylindrical extension (17) adjacent to the spherical contact part (3), against the End face (29) of the conductor (2) abuts.
EP86730112A 1985-07-25 1986-07-16 Coupling contact piece for a plug connection between two cylindrical conductors of a closed, gas pressure-insulated high voltage switching device Expired EP0210126B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3526918 1985-07-25
DE19853526918 DE3526918A1 (en) 1985-07-25 1985-07-25 COUPLING CONTACT PIECE FOR A CONNECTION BETWEEN TWO CYLINDRICAL LADDERS OF AN ENCLOSED, PRESSURE GAS-INSULATED HIGH-VOLTAGE SWITCHGEAR

Publications (2)

Publication Number Publication Date
EP0210126A1 true EP0210126A1 (en) 1987-01-28
EP0210126B1 EP0210126B1 (en) 1989-06-28

Family

ID=6276933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730112A Expired EP0210126B1 (en) 1985-07-25 1986-07-16 Coupling contact piece for a plug connection between two cylindrical conductors of a closed, gas pressure-insulated high voltage switching device

Country Status (3)

Country Link
EP (1) EP0210126B1 (en)
JP (1) JPS6231311A (en)
DE (2) DE3526918A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662846A1 (en) * 1990-06-05 1991-12-06 Materiel Electr Soc Ind Connector for joining electrical conductors, especially for underground mains
WO2010010065A1 (en) * 2008-07-23 2010-01-28 Siemens Aktiengesellschaft Coupling contact piece
DE102011005700A1 (en) * 2011-03-17 2012-09-20 Siemens Aktiengesellschaft Electrical contact arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815536C1 (en) * 1998-03-31 1999-07-29 Siemens Ag High-voltage (HV) switchgear enclosure plug-in connection for phase-conductor sections

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706973A (en) * 1926-06-02 1929-03-26 American Lurgi Corp Connecter for hollow electrical conductors or tubes
CH402995A (en) * 1961-11-24 1965-11-30 Siemens Ag Coupling contact piece for connecting round electrical conductors
DE2713121A1 (en) * 1977-03-22 1978-09-28 Siemens Ag Connector for metal cladded HV switchgear - has lever engaging conductor and sprung radial laminations providing contact
DE3203106A1 (en) * 1982-01-30 1983-08-11 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Arrangement for connecting two waveguides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706973A (en) * 1926-06-02 1929-03-26 American Lurgi Corp Connecter for hollow electrical conductors or tubes
CH402995A (en) * 1961-11-24 1965-11-30 Siemens Ag Coupling contact piece for connecting round electrical conductors
DE2713121A1 (en) * 1977-03-22 1978-09-28 Siemens Ag Connector for metal cladded HV switchgear - has lever engaging conductor and sprung radial laminations providing contact
DE3203106A1 (en) * 1982-01-30 1983-08-11 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Arrangement for connecting two waveguides

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662846A1 (en) * 1990-06-05 1991-12-06 Materiel Electr Soc Ind Connector for joining electrical conductors, especially for underground mains
WO2010010065A1 (en) * 2008-07-23 2010-01-28 Siemens Aktiengesellschaft Coupling contact piece
DE102011005700A1 (en) * 2011-03-17 2012-09-20 Siemens Aktiengesellschaft Electrical contact arrangement

Also Published As

Publication number Publication date
EP0210126B1 (en) 1989-06-28
DE3526918A1 (en) 1987-01-29
JPS6231311A (en) 1987-02-10
DE3664177D1 (en) 1989-08-03

Similar Documents

Publication Publication Date Title
DE2934317A1 (en) ELECTRIC CLAMP FOR ATTACHING TO A RAIL
DE3722069A1 (en) SIGNAL HORN SWITCHING DEVICE FOR A STEERING WHEEL
DE3022154C2 (en) Electrical sealing device
EP0938165A1 (en) Coaxial high frequency cable connector
DE4111054A1 (en) CONNECTING PLUG
DE69310738T2 (en) LOAD SWITCH
DE2550245A1 (en) CONNECTING CLAMP FOR A DEVICE OR ELEMENT FOR ELECTRICAL CONNECTION
EP0210126B1 (en) Coupling contact piece for a plug connection between two cylindrical conductors of a closed, gas pressure-insulated high voltage switching device
DE3524817C2 (en)
DE3101519C2 (en) Electrically conductive sealing profile for producing a high-frequency seal between metallic housing parts
DE3400449A1 (en) ELECTRIC LAMP WITH CRUSH FOOT STORED IN A SOCKET-BASED BASE
EP0252344A1 (en) Electromagnetic relay
DE2440829B2 (en) Vacuum switching tube
EP0182736B1 (en) Connection piece to connect round electrical conductors together
DE3043811A1 (en) LIMIT SWITCH
DE3237146C2 (en)
DE102022107120B4 (en) Electrical connection device
DE3621644C2 (en)
DE19539958A1 (en) Contact for conducting electric current in conductor lead e.g. for contact rails
DE9112701U1 (en) Field spacers for high-voltage overhead lines with bundled conductors
DE69818630T2 (en) Movable contact element for high-voltage circuit breakers, and expandable
DE2251446C3 (en) Brush for electrical machines
DE102004040118A1 (en) Small device-pressure contact, has elastic, electric conductive contact device laterally fastened onto contact pin and pressing against guide for mounting of electrical connection between guide and contact device
DE69403578T2 (en) Head of a spot welding machine
WO1998047206A1 (en) Voltage converter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19870223

17Q First examination report despatched

Effective date: 19881003

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI SE

REF Corresponds to:

Ref document number: 3664177

Country of ref document: DE

Date of ref document: 19890803

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900614

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900724

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19900727

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900919

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19901024

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910716

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910717

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19910731

Ref country code: CH

Effective date: 19910731

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 86730112.9

Effective date: 19920210