EP0573690A1 - Pressure contact - Google Patents

Pressure contact Download PDF

Info

Publication number
EP0573690A1
EP0573690A1 EP92109792A EP92109792A EP0573690A1 EP 0573690 A1 EP0573690 A1 EP 0573690A1 EP 92109792 A EP92109792 A EP 92109792A EP 92109792 A EP92109792 A EP 92109792A EP 0573690 A1 EP0573690 A1 EP 0573690A1
Authority
EP
European Patent Office
Prior art keywords
base body
conductor
pressure contact
contact piece
contact
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.)
Withdrawn
Application number
EP92109792A
Other languages
German (de)
French (fr)
Inventor
Antal Antunovits
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.)
General Electric Switzerland GmbH
Original Assignee
GEC Alsthom T&D AG
Sprecher Energie 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 GEC Alsthom T&D AG, Sprecher Energie AG filed Critical GEC Alsthom T&D AG
Priority to EP92109792A priority Critical patent/EP0573690A1/en
Publication of EP0573690A1 publication Critical patent/EP0573690A1/en
Withdrawn legal-status Critical Current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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs

Definitions

  • the present invention relates to a pressure contact according to the preamble of claim 1.
  • Pressure contacts of this type are used primarily for the electrical connection of two conductors, which can have large position tolerances against each other.
  • a pressure contact is known from DE-A-39 38 706, the spring-loaded contact piece of which is designed as a hollow cylinder with longitudinal slots on its rear end region facing a base body. The remaining segments between these slots form contact fingers which rest against the outside on the inside of the hollow cylindrical base body with their own spring.
  • the production of this pressure contact is extremely complex and there is also the risk that at high currents, even if they only occur briefly, the contact fingers are attracted to one another and therefore stand out from the base body. This can lead to the formation of an arc and thus to welding between the base body and the spring-loaded contact piece, so that the pressure contact is blocked and its spring property is eliminated.
  • the base body and the contact piece can be produced solely by turning and assembled with little effort.
  • the helix lies with each of its large number of turns on the contact piece and on the base body, which leads to small current loads on the half-turns and the contacts.
  • the helix is elastic in the radial direction, but has a high spring constant, so that large contact pressures and great stability against the forces caused by the current are achieved.
  • the sections of the helix with which it rests on the base body also run, for example in the direction of movement of the contact piece, so that low friction can be achieved. At the same time, the helix ensures that the contact piece is centered in the base body.
  • FIG. 1 shows part of a metal-encapsulated, pressurized gas-insulated switchgear in which first conductors 12 are electrically connected to second conductors 14 via resilient pressure contacts 10.
  • the pressure contacts 10 each have an essentially cylindrical base body 16 which is fastened to the relevant first conductor 12 by means of a screw connection 18.
  • the end hood 24 is seated on the high-voltage connection conductor 26 of a voltage converter 28.
  • the voltage converters 28, each assigned to a phase, are fastened to a cover 30 of the metal encapsulation 32.
  • This cover 30 is fastened in a known manner via screw connections to a tubular encapsulation part 34 which envelops the voltage converter 28 and connect to the further encapsulation parts not shown on the side facing away from the cover 30.
  • the lid 30 is substantially in the direction of the axis 34 ' rotationally symmetrical encapsulation part 34 can be lifted off this, or can be placed on it during assembly.
  • the pressure contacts 10 each take up the tolerances occurring in the axial direction between the fixedly arranged first conductors 12 and the second conductors 14. Tolerances in the radial direction are absorbed by the end caps 24.
  • the first conductors 12 are firmly supported in a generally known manner via insulating cones 36 with respect to the encapsulation 32.
  • insulating cones 36 On the side facing the voltage transformers 28 with respect to the insulating cones 36, they each have a shield-like end body 38 which carries the pressure contact 10 in question directly or indirectly via a cantilever-like connecting conductor 40.
  • the rotationally symmetrical contact piece 22 has, in its area engaging in the hollow cylindrical base body 16, a circumferential bead 42 in which a circumferential groove 44 which is open radially to the outside and is approximately rectangular in cross section is recessed.
  • a circumferential groove 44 Arranged in the circumferential groove 44 is a helical spring-like helix 46 made of electrically conductive, resilient material, which rests on the coaxial inner lateral surface 48 of the base body 16.
  • the circumferential groove 44 is shaped with respect to the circumferential surface 48 such that the helix 46 is elastically compressed in the radial direction with respect to the axis 20 and thus rests under spring force both on the circumferential surface 48 and on the bottom 50 of the circumferential groove 44.
  • the two axial end walls 52 of the circumferential groove 44 are so far apart spaced apart that in the assembled state, ie when the contact piece 22 with the helix 46 is arranged in the base body 16, the helix 46 compressed in the radial direction also bears against the end walls 52 in the axial direction. This increases the force with which the helix 46 rests on the lateral surface 48 and on the bottom 50, and in particular a lifting of the helix 46 from the lateral surface 48 and / or from the bottom 50, even at very high currents, is avoided. If the helix 46 itself has a sufficiently high rigidity, there is of course no need to support the end walls 52.
  • a circumferential retaining groove 54 is open on the base body 16, into which a snap ring 56 is inserted, which cooperates as a stop with the peripheral bead 42 of the contact piece 20 in order to prevent it from doing so by the force a coil spring 58 to be displaced out of the base body 16.
  • the one-piece base body 16 On the side facing the first conductor 12, the one-piece base body 16 has a base part 62 on which the helical spring 58 is supported with its end on this side.
  • the bottom part 62 now has a contact surface 64 with respect to its end face projecting in the direction of the axis 20 threaded pin 66 with which the base body 16 is screwed to the connecting conductor 40 of the first conductor 12.
  • the threaded pin 66 On the inside facing the base body 16, the threaded pin 66 has a recess 68 into which the coil spring 58 engages. Therefore, the diameter of the threaded pin 66 is larger than the diameter of the helical spring 58.
  • This embodiment achieves a low overall height, measured in the axial direction from the contact surface 64 to the free end of the contact piece 22 on the end face.
  • the bottom part 62 is flat, which means that in order to achieve the same spring properties of the pressure contact 10 with the same coil spring 58 as for the pressure contact 10 according to FIG. 3, the overall height corresponding to the depth of the recess 68 is greater.
  • the bottom part 62 is penetrated through a coaxial passage 70 by a screw 72 which engages in the first conductor 12 and pulls the base body 16 with its contact surface 64 against the first conductor 12.
  • the outside diameter 74 of the head 72 'of the screw 72 is smaller than the inside width 58' of the coil spring 58.
  • the contact piece 22 also has an axial passage 76, the diameter 76 'of which is now smaller than the outside diameter 74 of the screw head 72', however is larger than the diameter of a tool 78 for tightening the screw 72. This enables the finished assembly of the pressure contact 10 including the screw 72 loosely arranged therein. The tool 78 can then be used to tighten the screw 72 and thus the pressure contact 10 are attached to the first conductor 12.
  • the distance between the base part 62 and the contact piece 22 in the axial direction is preferably smaller than the length of the screw 72. This prevents the screw from disengaging from the passage 70.
  • An internal polygon is preferably formed on the screw head 72 ', so that large torques can be applied with the corresponding tool 78, which has small dimensions in diameter.
  • a threaded pin 66 ' also protrudes from the bottom part 62 with respect to the contact surface 64. 3, since it has no recess 68 and the helical spring 58 is supported on the base part 62, which is flat against the interior of the base body 16. The overall height is thus the same as that of the embodiment shown in FIG. 4. However, an axial passage 76 in the contact piece 22 is not necessary.

Abstract

The pressure contact (10) has a hollow-cylindrical base body (16) in which the contact element (22) is guided displaceably in the direction of the axis (20) and is supported thereon via the helical spring (58) which is constructed as a compression spring. A circumferential groove (44) is recessed on the contact element (22), in which circumferential groove (44) a helix (46) consisting of electrically conductive, resilient material is arranged. The helix (46) rests against the outer surface (48) of the base body (16) and electrically connects the latter to the contact element (22). That is attached to the first conductor (12) via a screw connection. The pressure contact (10) can be pressed axially against a second conductor in order to connect this first conductor (12) to said second conductor electrically. <IMAGE>

Description

Die vorliegende Erfindung betrifft einen Druckkontakt gemäss dem Oberbegriff des Anspruchs 1.The present invention relates to a pressure contact according to the preamble of claim 1.

Druckkontakte dieser Art dienen vorwiegend zur elektrischen Verbindung zweier Leiter, die gegeneinander grosse Lagetoleranzen haben können.Pressure contacts of this type are used primarily for the electrical connection of two conductors, which can have large position tolerances against each other.

Aus der DE-A-39 38 706 ist ein Druckkontakt bekannt, dessen gefedertes Kontaktstück an seinem einem Grundkörper zugewandten hinteren Endbereich als Hohlzylinder mit längsverlaufenden Schlitzen ausgebildet ist. Die verbleibenden Segmente zwischen diesen Schlitzen bilden Kontaktfinger, die mit Eigenfederung aussen auf der Innenseite des hohlzylinderförmigen Grundkörpers anliegen. Die Herstellung dieses Druckkontakts ist äusserst aufwendig und zudem besteht die Gefahr, dass bei hohen Strömen, auch wenn diese nur kurzzeitig auftreten, die Kontaktfinger gegenseitig angezogen werden und sich deshalb vom Grundkörper abheben. Dies kann zur Bildung von Lichtbogen und damit zu Verschweissungen zwischen dem Grundkörper und dem gefederten Kontaktstück führen, so dass der Druckkontakt blockiert und seine Federeigenschaft aufgehoben ist.A pressure contact is known from DE-A-39 38 706, the spring-loaded contact piece of which is designed as a hollow cylinder with longitudinal slots on its rear end region facing a base body. The remaining segments between these slots form contact fingers which rest against the outside on the inside of the hollow cylindrical base body with their own spring. The production of this pressure contact is extremely complex and there is also the risk that at high currents, even if they only occur briefly, the contact fingers are attracted to one another and therefore stand out from the base body. This can lead to the formation of an arc and thus to welding between the base body and the spring-loaded contact piece, so that the pressure contact is blocked and its spring property is eliminated.

Bei einem weiteren Druckkontakt gemäss der DE-C-27 41 257 ist der Grundkörper mit dem gefederten Kontaktstück über flexible Litzen verbunden. Auch bei diesem Druckkontakt ist die Herstellung mit einem beträchtlichen manuellen Aufwand verbunden und es besteht bei häufiger Betätigung die Gefahr eines Bruchs der Litzen.In the case of a further pressure contact according to DE-C-27 41 257, the base body is connected to the spring-loaded contact piece via flexible strands. Even with this pressure contact, the production is associated with considerable manual effort and there is a risk of the strands breaking if operated frequently.

Es ist deshalb Aufgabe der vorliegenden Erfindung, einen gattungsgemässen Druckkontakt zu schaffen, der eine verbesserte Tragfähigkeit für hohe Ströme aufweist und einfach herstellbar ist.It is therefore an object of the present invention to provide a generic pressure contact which has an improved load-bearing capacity for high currents and is easy to produce.

Diese Aufgabe wird mit einem gattungsbildenden Druckkontakt gelöst, der die Merkmale im Kennzeichen des Anspruchs 1 aufweist.This object is achieved with a generic pressure contact which has the features in the characterizing part of claim 1.

Beim erfindungsgemässen Druckkontakt können der Grundkörper und das Kontaktstück allein durch Drehen hergestellt und mit wenig Aufwand montiert werden. Die Wendel liegt mit jeder ihrer Vielzahl von Windungen am Kontaktstück und am Grundkörper an, was zu kleinen Strombelastungen der Halbwindungen und der Kontakte führt. Die Wendel ist in radialer Richtung wohl elastisch, weist aber eine hohe Federkonstante auf, so dass grosse Kontaktdrücke und eine grosse Stabilität gegen die durch den Strom hervorgerufenen Kräfte erzielt wird. Weiter verlaufen die Abschnitte der Wendel, mit welcher sie am Grundkörper anliegt, etwa in Bewegungsrichtung des Kontaktstücks, so dass geringe Reibung erzielbar ist. Gleichzeitig sorgt die Wendel für eine Zentrierung des Konstaktstücks im Grundkörper.In the pressure contact according to the invention, the base body and the contact piece can be produced solely by turning and assembled with little effort. The helix lies with each of its large number of turns on the contact piece and on the base body, which leads to small current loads on the half-turns and the contacts. The helix is elastic in the radial direction, but has a high spring constant, so that large contact pressures and great stability against the forces caused by the current are achieved. The sections of the helix with which it rests on the base body also run, for example in the direction of movement of the contact piece, so that low friction can be achieved. At the same time, the helix ensures that the contact piece is centered in the base body.

Besonders bevorzugte Ausbildungsformen des erfindungsgemässen Druckkontakts sind in den abhängigen Ansprüchen angegeben.Particularly preferred embodiments of the pressure contact according to the invention are specified in the dependent claims.

Die vorliegende Erfindung wird nun anhand von in der Zeichnung dargestellten Ausbildungsformen näher beschrieben. Es zeigen rein schematisch:

Fig. 1
in Ansicht und teilweise geschnitten einen Teil einer gekapselten Schaltanlage, bei welcher elektrische Leiter über Druckkontakte mit Spannungswandlern verbunden sind;
Fig. 2
vergrössert einen Ausschnitt aus der Fig. 1 mit einem Druckkontakt; und
Fig. 3-5
teilweise geschnitten drei unterschiedliche Ausbildungsformen des Druckkontakts.
The present invention will now be described with reference to training forms shown in the drawing. It shows purely schematically:
Fig. 1
in view and partially cut a part an encapsulated switchgear in which electrical conductors are connected to voltage transformers via pressure contacts;
Fig. 2
enlarges a section of Figure 1 with a pressure contact. and
Fig. 3-5
partially cut three different forms of training in pressure contact.

Fig. 1 zeigt einen Teil einer metallgekapselten, druckgasisolierten Schaltanlage, bei welcher über federnde Druckkontakte 10 erste Leiter 12 mit zweiten Leitern 14 elektrisch verbunden sind. Wie dies insbesondere auch aus der Fig. 2 hervorgeht, weisen die Druckkontakte 10 je einen im wesentlichen zylinderförmigen Grundkörper 16 auf, der mittels einer Schraubenverbindung 18 am betreffenden ersten Leiter 12 befestigt ist. Auf der dem ersten Leiter 12 abgewandten Seite steht in axialer Richtung über den Grundkörper 16 ein ebenfalls zur Achse 20 rotationssymmetrisches, am Grundkörper federnd abgestütztes und an diesem koaxial geführtes Kontaktstück 22 vor, das axial gegen eine stirnseitige Endhaube 24 des zweiten Leiters 14 gedrückt ist. Die Endhaube 24 sitzt auf dem hochspannungsseitigen Anschlussleiter 26 eines Spannungswandlers 28. Die jeweils einer Phase zugeordneten Spannungswandler 28 sind an einem Deckel 30 der metallenen Kapselung 32 befestigt. Dieser Deckel 30 ist in bekannter Art und Weise über Schraubenverbindungen an einem rohrartigen Kapselungsteil 34 befestigt, der die Spannungswandler 28 umhüllt und an den auf der dem Deckel 30 abgewandten Seite nicht gezeigte weitere Kapselungsteile anschliessen. Der Deckel 30 ist in Richtung der Achse 34' des im wesentlichen rotationssymmetrischen Kapselungsteils 34 von diesem abhebbar, bzw. bei der Montage auf diesen absetzbar. Dabei nehmen die Druckkontakte 10 jeweils die in axialer Richtung auftretenden Toleranzen zwischen den fest angeordneten ersten Leitern 12 und den zweiten Leitern 14 auf. Toleranzen in radialer Richtung werden durch die Endhauben 24 aufgenommen.1 shows part of a metal-encapsulated, pressurized gas-insulated switchgear in which first conductors 12 are electrically connected to second conductors 14 via resilient pressure contacts 10. As can be seen in particular from FIG. 2, the pressure contacts 10 each have an essentially cylindrical base body 16 which is fastened to the relevant first conductor 12 by means of a screw connection 18. On the side facing away from the first conductor 12, in the axial direction, beyond the base body 16, there is a contact piece 22, which is also rotationally symmetrical about the axis 20, resiliently supported on the base body and guided coaxially thereon, and which is pressed axially against an end cap 24 of the second conductor 14. The end hood 24 is seated on the high-voltage connection conductor 26 of a voltage converter 28. The voltage converters 28, each assigned to a phase, are fastened to a cover 30 of the metal encapsulation 32. This cover 30 is fastened in a known manner via screw connections to a tubular encapsulation part 34 which envelops the voltage converter 28 and connect to the further encapsulation parts not shown on the side facing away from the cover 30. The lid 30 is substantially in the direction of the axis 34 ' rotationally symmetrical encapsulation part 34 can be lifted off this, or can be placed on it during assembly. The pressure contacts 10 each take up the tolerances occurring in the axial direction between the fixedly arranged first conductors 12 and the second conductors 14. Tolerances in the radial direction are absorbed by the end caps 24.

Die ersten Leiter 12 sind in allgemein bekannter Art und Weise über Isolierkonen 36 bezüglich der Kapselung 32 fest abgestützt. Sie weisen auf der bezüglich der Isolierkonen 36 den Spannungswandlern 28 zugewandten Seite je einen abschirmhaubenartigen Endkörper 38 auf, welche den betreffenden Druckkontakt 10 direkt oder mittelbar über einen auslegerartigen Verbindungsleiter 40 tragen.The first conductors 12 are firmly supported in a generally known manner via insulating cones 36 with respect to the encapsulation 32. On the side facing the voltage transformers 28 with respect to the insulating cones 36, they each have a shield-like end body 38 which carries the pressure contact 10 in question directly or indirectly via a cantilever-like connecting conductor 40.

Anhand der Figuren 3-5 werden unterschiedliche Ausbildungsformen des Druckkontaktes 10 beschrieben.3-5, different forms of formation of the pressure contact 10 are described.

Das rotationssymmetrische Kontaktstück 22 weist in seinem in den hohlzylinderförmigen Grundkörper 16 hineingreifenden Bereich einen Umfangswulst 42 auf, in dem eine radial gegen aussen offene, im Querschnitt etwa rechteckige Umfangsnut 44 ausgenommen ist. In der Umfangsnut 44 ist eine schraubenfederartige Wendel 46 aus elektrisch leitendem, federndem Material angeordnet, die an der koaxialen inneren Mantelfläche 48 des Grundkörpers 16 anliegt. Die Umfangsnut 44 ist bezüglich der Mantelfläche 48 derart geformt, dass die Wendel 46 bezüglich der Achse 20 in radialer Richtung elastisch zusammengedrückt ist und diese somit unter Federkraft sowohl an der Mantelfläche 48 als auch am Boden 50 der Umfangsnut 44 anliegt. Die beiden axialen Stirnwände 52 der Umfangsnut 44 sind so weit voneinander beabstandet, dass im montierten Zustand, d.h. wenn das Kontaktstück 22 mit der Wendel 46 im Grundkörper 16 angeordnet sind, die in radialer Richtung gestauchte Wendel 46 in axialer Richtung auch an den Stirnwänden 52 anliegt. Dadurch wird die Kraft vergrössert, mit welcher die Wendel 46 an der Mantelfläche 48 und am Boden 50 anliegt, und insbesondere wird ein Abheben der Wendel 46 ab der Mantelfläche 48 und/oder ab dem Boden 50, selbst bei sehr hohen Strömen, vermieden. Weist die Wendel 46 selbst eine genügend hohe Steifigkeit auf, kann selbstverständlich auf das Abstützen an den Stirnwänden 52 verzichtet werden.The rotationally symmetrical contact piece 22 has, in its area engaging in the hollow cylindrical base body 16, a circumferential bead 42 in which a circumferential groove 44 which is open radially to the outside and is approximately rectangular in cross section is recessed. Arranged in the circumferential groove 44 is a helical spring-like helix 46 made of electrically conductive, resilient material, which rests on the coaxial inner lateral surface 48 of the base body 16. The circumferential groove 44 is shaped with respect to the circumferential surface 48 such that the helix 46 is elastically compressed in the radial direction with respect to the axis 20 and thus rests under spring force both on the circumferential surface 48 and on the bottom 50 of the circumferential groove 44. The two axial end walls 52 of the circumferential groove 44 are so far apart spaced apart that in the assembled state, ie when the contact piece 22 with the helix 46 is arranged in the base body 16, the helix 46 compressed in the radial direction also bears against the end walls 52 in the axial direction. This increases the force with which the helix 46 rests on the lateral surface 48 and on the bottom 50, and in particular a lifting of the helix 46 from the lateral surface 48 and / or from the bottom 50, even at very high currents, is avoided. If the helix 46 itself has a sufficiently high rigidity, there is of course no need to support the end walls 52.

Im vom ersten Leiter 12 abgewandten Endbereich ist am Grundkörper 16 eine gegen innen offene, umlaufende Haltenut 54 ausgenommen, in die ein Sprengring 56 eingesetzt ist, welcher als Anschlag mit dem Umfangswulst 42 des Kontaktstückes 20 zusammenwirkt, um dieses daran zu hindern, durch die Kraft einer Schraubenfeder 58 aus dem Grundkörper 16 hinaus verdrängt zu werden.In the end area facing away from the first conductor 12, a circumferential retaining groove 54 is open on the base body 16, into which a snap ring 56 is inserted, which cooperates as a stop with the peripheral bead 42 of the contact piece 20 in order to prevent it from doing so by the force a coil spring 58 to be displaced out of the base body 16.

Um die als Druckfeder wirkende Schraubenfeder 58 zu zentrieren, greift sie mit ihrem dem Kontaktstück 22 zugewandten Endbereich in eine an diesem stirnseitig ausgenommene Vertiefung 60 ein.In order to center the helical spring 58 acting as a compression spring, it engages with its end region facing the contact piece 22 into a recess 60 which is recessed on the end face thereof.

Auf der dem ersten Leiter 12 zugewandten Seite weist der einstückig ausgebildete Grundkörper 16 ein Bodenteil 62 auf, an dem sich die Schraubenfeder 58 mit ihrem diesseitigen Ende abstützt.On the side facing the first conductor 12, the one-piece base body 16 has a base part 62 on which the helical spring 58 is supported with its end on this side.

Beim Druckkontakt 10 gemäss Fig. 3 weist nun der Bodenteil 62 einen bezüglich seiner stirnseitigen Kontaktfläche 64 in Richtung der Achse 20 abstehenden Gewindezapfen 66 auf, mit welchem der Grundkörper 16 mit dem Verbindungsleiter 40 des ersten Leiters 12 verschraubt ist. Auf der dem Innern des Grundkörpers 16 zugewandten Seite weist der Gewindezapfen 66 eine Ausnehmung 68 auf, in die die Schraubenfeder 58 eingreift. Deshalb ist der Durchmesser des Gewindezapfens 66 grösser als der Durchmesser der Schraubenfeder 58. Durch diese Ausbildungsform wird eine, in axialer Richtung von der Kontaktfläche 64 bis zum stirnseitigen, freien Ende des Kontaktstücks 22 gemessene, geringe Bauhöhe erzielt.In the case of pressure contact 10 according to FIG. 3, the bottom part 62 now has a contact surface 64 with respect to its end face projecting in the direction of the axis 20 threaded pin 66 with which the base body 16 is screwed to the connecting conductor 40 of the first conductor 12. On the inside facing the base body 16, the threaded pin 66 has a recess 68 into which the coil spring 58 engages. Therefore, the diameter of the threaded pin 66 is larger than the diameter of the helical spring 58. This embodiment achieves a low overall height, measured in the axial direction from the contact surface 64 to the free end of the contact piece 22 on the end face.

Bei der Ausbildungsform gemäss Fig. 4 ist der Bodenteil 62 eben ausgebildet, wodurch, um mit derselben Schraubenfeder 58 wie beim Druckkontakt 10 gemäss Fig. 3 dieselben Federeigenschaften des Druckkontakts 10 zu erreichen, die Bauhöhe entsprechend der Tiefe der Ausnehmung 68 grösser ist.4, the bottom part 62 is flat, which means that in order to achieve the same spring properties of the pressure contact 10 with the same coil spring 58 as for the pressure contact 10 according to FIG. 3, the overall height corresponding to the depth of the recess 68 is greater.

Gemäss Fig. 4 ist der Bodenteil 62 durch einen koaxialen Durchlass 70 hindurch von einer Schraube 72 durchgriffen, die in den ersten Leiter 12 eingreift und den Grundkörper 16 mit seiner Kontaktfläche 64 gegen den ersten Leiter 12 zieht. Der Aussendurchmesser 74 des Kopfes 72' der Schraube 72 ist dabei kleiner als die lichte Weite 58' der Schraubenfeder 58. Weiter weist auch das Kontaktstück 22 einen Axialdurchlass 76 auf, dessen Durchmesser 76' nun kleiner als der Aussendurchmesser 74 des Schraubenkopfs 72', aber grösser als der Durchmesser eines Werkzeuges 78 zum Anziehen der Schraube 72 ist. Dies ermöglicht den fertigen Zusammenbau des Druckkontaktes 10 inklusiv mit der darin lose angeordneten Schraube 72. Mittels des Werkzeugs 78 kann dann die Schraube 72 angezogen und so der Druckkontakt 10 am ersten Leiter 12 befestigt werden. Vorzugsweise ist der Abstand zwischen dem Bodenteil 62 und dem Kontaktstück 22 in axialer Richtung kleiner als die Länge der Schraube 72. Dadurch wird verhindert, dass diese ausser Eingriff mit dem Durchlass 70 gelangt. Vorzugsweise ist am Schraubenkopf 72' ein Innenvielkant ausgebildet, so dass mit dem entsprechenden, im Durchmesser kleine Abmessungen aufweisenden, Werkzeug 78 grosse Drehmomente aufgebracht werden können.4, the bottom part 62 is penetrated through a coaxial passage 70 by a screw 72 which engages in the first conductor 12 and pulls the base body 16 with its contact surface 64 against the first conductor 12. The outside diameter 74 of the head 72 'of the screw 72 is smaller than the inside width 58' of the coil spring 58. Furthermore, the contact piece 22 also has an axial passage 76, the diameter 76 'of which is now smaller than the outside diameter 74 of the screw head 72', however is larger than the diameter of a tool 78 for tightening the screw 72. This enables the finished assembly of the pressure contact 10 including the screw 72 loosely arranged therein. The tool 78 can then be used to tighten the screw 72 and thus the pressure contact 10 are attached to the first conductor 12. The distance between the base part 62 and the contact piece 22 in the axial direction is preferably smaller than the length of the screw 72. This prevents the screw from disengaging from the passage 70. An internal polygon is preferably formed on the screw head 72 ', so that large torques can be applied with the corresponding tool 78, which has small dimensions in diameter.

Bei der Ausbildungsform gemäss Fig. 5 steht ebenfalls, ähnlich Fig. 3, bezüglich der Kontaktfläche 64 vom Bodenteil 62 ein Gewindezapfen 66' ab. Dieser ist aber im Durchmesser wesentlich kleiner ausgebildet als der Gewindezapfen 66 gemäss Fig. 3, da er keine Ausnehmung 68 aufweist und die Schraubenfeder 58 sich auf dem gegen das Innere des Grundkörpers 16 hin eben ausgebildeten Bodenteil 62 abstützt. Die Bauhöhe ist somit gleich jener der Ausbildungsform gemäss Fig. 4. Ein Axialdurchlass 76 im Kontaktstück 22 ist aber nicht notwendig.5, similar to FIG. 3, a threaded pin 66 'also protrudes from the bottom part 62 with respect to the contact surface 64. 3, since it has no recess 68 and the helical spring 58 is supported on the base part 62, which is flat against the interior of the base body 16. The overall height is thus the same as that of the embodiment shown in FIG. 4. However, an axial passage 76 in the contact piece 22 is not necessary.

Um bei den Ausbildungsformen gemäss den Fig. 3 und 5 die Druckkontakte 10, beispielsweise mittels eines Gabelschlüssels, gegenüber dem ersten Leiter 12 festziehen zu können, sind am Grundkörper 16 ebene Angriffsflächen 80 ausgebildet.3 and 5 in order to be able to tighten the pressure contacts 10, for example by means of a fork wrench, with respect to the first conductor 12, flat engagement surfaces 80 are formed on the base body 16.

In Zusammenschau der Fig. 1 und 3 wird deutlich, dass der Druckkontakt 10 gemäss Fig. 3 am Verbindungsleiter 40 des ersten Leiters 12 befestigt ist, wogegen die Druckkontakte 10 gemäss den Fig. 4 oder 5 direkt am Endkörper 38 der ersten Leiter 12 angeschraubt sind. Durch die unterschiedlichen Bauhöhen der Druckkontakte 10 kann somit die Dicke des Verbindungsleiters 40 in Richtung der Achse 20 und somit auch der Achse 34' aufgenommen werden.1 and 3, it is clear that the pressure contact 10 according to FIG. 3 is attached to the connecting conductor 40 of the first conductor 12, whereas the pressure contacts 10 according to FIGS. 4 or 5 are screwed directly onto the end body 38 of the first conductor 12 . Due to the different heights of the pressure contacts 10, the thickness can of the connecting conductor 40 in the direction of the axis 20 and thus also the axis 34 '.

Claims (7)

Druckkontakt mit einem etwa hohlzylinderförmigen, mit einem ersten Leiter (12) fest verbindbaren Grundkörper (16) und einem darin koaxial geführten, daran federnd abgestützten und mit diesem elektrisch verbundenen Kontaktstück (22), das axial gegen einen zweiten Leiter (14) drückbar ist, dadurch gekennzeichnet, dass das Kontaktstück (22) eine radial gegen aussen offene Umfangsnut (44) aufweist, in der eine am Grundkörper (16) anliegende Wendel (46) aus elektrisch leitendem, federndem Material angeordnet ist.Pressure contact with an approximately hollow cylindrical base body (16) which can be fixedly connected to a first conductor (12) and a contact piece (22) which is coaxially guided therein, resiliently supported thereon and electrically connected thereto, which can be pressed axially against a second conductor (14), characterized in that the contact piece (22) has a circumferential groove (44) which is open radially towards the outside and in which a helix (46) made of electrically conductive, resilient material is arranged which is in contact with the base body (16). Druckkontakt nach Anspruch 1, dadurch gekennzeichnet, dass der Grundkörper (16) eine gegen innen offene, umlaufende Haltenut (54) aufweist, in die ein Sprengring (56) als Anschlag für das gefederte Kontaktstück (22) eingesetzt ist.Pressure contact according to Claim 1, characterized in that the base body (16) has a circumferential retaining groove (54) which is open towards the inside and into which a snap ring (56) is inserted as a stop for the spring-loaded contact piece (22). Druckkontakt nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Grundkörper (16) mittels einer Schraubenverbindung (18) mit dem ersten Leiter (12) verbindbar ist.Pressure contact according to claim 1 or 2, characterized in that the base body (16) can be connected to the first conductor (12) by means of a screw connection (18). Druckkontakt nach Anspruch 3, dadurch gekennzeichnet, dass am Grundkörper (16) ein Gewinde angeformt ist.Pressure contact according to claim 3, characterized in that a thread is formed on the base body (16). Druckkontakt nach Anspruch 4, dadurch gekennzeichnet, dass vom Grundkörper (16) auf der dem Kontaktstück (22) abgewandten Seite ein axialer Gewindezapfen (66) absteht, zwischen dem Kontaktstück (22) und dem Grundkörper (16) eine Schraubenfeder (58) angeordnet ist und der Gewindezapfen (66) eine Ausnehmung (68) aufweist in die die Schraubenfeder (58) eingreift.Pressure contact according to claim 4, characterized in that an axial threaded pin (66) projects from the base body (16) on the side facing away from the contact piece (22), between the contact piece (22) and the base body (16) a coil spring (58) is arranged and the threaded pin (66) has a recess (68) into which the coil spring (58) engages. Druckkontakt nach Anspruch 3, dadurch gekennzeichnet, dass der Grundkörper (16) einen Durchlass (70) aufweist, der zum Befestigen des Druckkontakts (10) am ersten Leiter (12) von einer Schraube (72) durchgriffen ist.Pressure contact according to claim 3, characterized in that the base body (16) has a passage (70) which is penetrated by a screw (72) for fastening the pressure contact (10) to the first conductor (12). Druckkontakt nach Anspruch 4, dadurch gekennzeichnet, dass zwischen dem Kontaktstück (22) und dem Grundkörper (16) eine Schraubenfeder (58) angeordnet ist, deren lichte Weite (58') grösser ist als der Aussendurchmesser (74) des Kopfs (72') der Schraube (72), und dass das Kontaktstück (22) einen Axialdurchlass (76) aufweist, dessen Durchmesser (76') grösser ist als der Aussendurchmesser eines zum Anziehen der Schraube (72) dienenden Werkzeugs (78), sodass die Schraube (72) bei vollständig zusammengebautem Kontaktstück (10) zum Befestigen am ersten Leiter (12) angezogen werden kann.Pressure contact according to Claim 4, characterized in that a helical spring (58) is arranged between the contact piece (22) and the base body (16), the inside width (58 ') of which is larger than the outside diameter (74) of the head (72') the screw (72), and that the contact piece (22) has an axial passage (76), the diameter (76 ') of which is larger than the outside diameter of a tool (78) used to tighten the screw (72), so that the screw (72 ) can be tightened when the contact piece (10) is fully assembled for fastening to the first conductor (12).
EP92109792A 1992-06-11 1992-06-11 Pressure contact Withdrawn EP0573690A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92109792A EP0573690A1 (en) 1992-06-11 1992-06-11 Pressure contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92109792A EP0573690A1 (en) 1992-06-11 1992-06-11 Pressure contact

Publications (1)

Publication Number Publication Date
EP0573690A1 true EP0573690A1 (en) 1993-12-15

Family

ID=8209700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109792A Withdrawn EP0573690A1 (en) 1992-06-11 1992-06-11 Pressure contact

Country Status (1)

Country Link
EP (1) EP0573690A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716474A1 (en) 1994-12-05 1996-06-12 Multi-Contact Ag Contact element for connecting two contact pieces
EP0718918A1 (en) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connector with spring contact member and shorting means
EP0718919A1 (en) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connector with spring contact member and shorting means
DE19634434A1 (en) * 1995-08-29 1997-03-06 Yazaki Corp Heavy-current connector plug e.g. for electric vehicle
EP0989291A2 (en) * 1998-09-24 2000-03-29 Mannesmann VDO Aktiengesellschaft Device to realize a contact with a contact plate
GB2398436A (en) * 2003-02-13 2004-08-18 Ito Seisakusho Press fitting type spring connector
WO2006025510A1 (en) * 2004-08-30 2006-03-09 Yokowo Co., Ltd. Spring connector
DE102004040118A1 (en) * 2004-08-18 2006-03-09 Ims Connector Systems Gmbh 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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1542102A (en) * 1975-01-30 1979-03-14 Square D Co Electrical connecting assembly
EP0314229A1 (en) * 1987-10-26 1989-05-03 AT&amp;T NETWORK SYSTEMS INTERNATIONAL B.V. Coaxial connector
US4904213A (en) * 1989-04-06 1990-02-27 Motorola, Inc. Low impedance electric connector
DE3938706C1 (en) * 1989-11-17 1990-10-04 Fabeg Gmbh, 7518 Bretten, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1542102A (en) * 1975-01-30 1979-03-14 Square D Co Electrical connecting assembly
EP0314229A1 (en) * 1987-10-26 1989-05-03 AT&amp;T NETWORK SYSTEMS INTERNATIONAL B.V. Coaxial connector
US4904213A (en) * 1989-04-06 1990-02-27 Motorola, Inc. Low impedance electric connector
DE3938706C1 (en) * 1989-11-17 1990-10-04 Fabeg Gmbh, 7518 Bretten, De

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716474A1 (en) 1994-12-05 1996-06-12 Multi-Contact Ag Contact element for connecting two contact pieces
EP0718918A1 (en) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connector with spring contact member and shorting means
EP0718919A1 (en) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connector with spring contact member and shorting means
DE19634434A1 (en) * 1995-08-29 1997-03-06 Yazaki Corp Heavy-current connector plug e.g. for electric vehicle
DE19634434C2 (en) * 1995-08-29 2002-01-24 Yazaki Corp Plug connection with pressure contact and fixed counter contact
EP0989291A3 (en) * 1998-09-24 2000-12-20 Mannesmann VDO Aktiengesellschaft Device to realize a contact with a contact plate
DE19843770A1 (en) * 1998-09-24 2000-03-30 Mannesmann Vdo Ag Device for contacting a circuit board
US6227871B1 (en) 1998-09-24 2001-05-08 Mannesmann Vdo Ag Device for contact-connecting a circuit board
EP0989291A2 (en) * 1998-09-24 2000-03-29 Mannesmann VDO Aktiengesellschaft Device to realize a contact with a contact plate
GB2398436A (en) * 2003-02-13 2004-08-18 Ito Seisakusho Press fitting type spring connector
GB2398436B (en) * 2003-02-13 2005-11-16 Ito Seisakusho Press fitting type spring connector
DE102004040118A1 (en) * 2004-08-18 2006-03-09 Ims Connector Systems Gmbh 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
WO2006025510A1 (en) * 2004-08-30 2006-03-09 Yokowo Co., Ltd. Spring connector

Similar Documents

Publication Publication Date Title
EP1472761A1 (en) Remakeable connector arrangement
EP0573690A1 (en) Pressure contact
DE102006025446B4 (en) Contacting and connection element for carrying out repair and maintenance work on electrical systems under voltage
CH677046A5 (en)
DE102005033212B4 (en) High voltage fuse
DE10119183C1 (en) Unit for electrically joining two switch chambers comprises a field control element which consists of an elastically deformable material and axially extends over the entire connector element
EP3476006B1 (en) Assembly comprising a copper busbar and a fixing nut
EP0643255B1 (en) Electric lamp
DE4410650A1 (en) Releasable coupling for aligned electrical conductors in encapsulated gas-insulated MV or HV switch
EP0597147A1 (en) Metal clad high voltage installation and an assembly for such an installation
DE4444554C2 (en) Encapsulated electrical high-voltage line
BE1014553A3 (en) CONTACT ARRANGEMENT FOR lubricants and PRONGS ELECTRICAL DEVICES AND EQUIPMENT, AND IN PARTICULAR THE ELECTRICAL ENERGIETECHNICK, as well as tax and instrumentation.
DE3101519A1 (en) Conductive sealing profile for producing a radio-frequency seal on separating joints between metallic housing parts
EP0636283B1 (en) Stopper providing electrically insulating closure of a socket
DE3840140C2 (en) Connector pin for electrical connectors
DE3014600C2 (en) Connection fitting for an insulator rod made of glass fiber reinforced plastic
EP0210126B1 (en) Coupling contact piece for a plug connection between two cylindrical conductors of a closed, gas pressure-insulated high voltage switching device
DE1137783B (en) Plug connection for electrical lines
EP0380980B1 (en) Vacuum switch
EP1078425B1 (en) Electric plug-in connector
CH705378B1 (en) Gland.
DE102019104551B4 (en) Terminal for connecting an electrical conductor
DE4135390C1 (en) Current connecting plug for power supply - has rotatable fixing ring on housing allowing connection to housing of cooperating socket
DE19737426B4 (en) Socket for medium-voltage switchgear
CH678126A5 (en) Medium=voltage vacuum switch with rolling contact arrangement - has switch surrounded by section of external connector which extends into insulating housing with aperture for contact plunger

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): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

RBV Designated contracting states (corrected)

Designated state(s): CH LI

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GEC ALSTHOM T&D AG

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940616