Device for contacting an electrical conductor, and connection system

Abstract

The invention relates to a device (1) for contacting an electrical conductor (2), in particular a cable conductor of a power supply cable, at least comprising - a connection body (3) which delimits a receiving space (4) into which the conductor (2) to be contacted can be inserted by way of the face end (5) thereof, and - a contact medium (6) having a multiplicity of electrically conductive contact bodies (7) which are introduced into the receiving space (4) and bear against one another and by means of which the face end (5) of the conductor (2) can be electrically contacted. According to the invention, the electrical conductor (2) can be fixed in the receiving space (4), wherein a contact face (8), facing the conductor (2), of the receiving space (4) is designed such that electrical contacting between the connection body (3) and the conductor (2) is optimized.

Description

[0001] Device for contacting an electrical conductor and

[0002] Connection system

[0003] The present application claims priority from German patent application No. 10 2024 122 700.1, the contents of which are incorporated herein in full by reference.

[0004] The invention relates to a device for contacting an electrical conductor, in particular a cable conductor of a power supply cable, comprising at least a connecting body that defines a receiving space into which the conductor to be contacted can be inserted with its end face; and a contact medium with a plurality of electrically conductive and adjacent contact bodies inserted into the receiving space, with which the end face of the conductor can be electrically contacted.

[0005] The invention further relates to a connection system.

[0006] Devices for contacting an electrical conductor are known from the prior art.

[0007] From the prior art, for example from EP 3155694 B1, it is also known to contact the end face of the electrical conductor to be contacted by means of a contact medium which has a plurality of contact bodies.

[0008] In such devices, the current to be conducted flows from a front end of the conductor to be contacted through several adjacent contact bodies of the contact medium to a transfer area, from which the current transport takes place again in continuous conductors.

[0009] A disadvantage of devices known from the prior art is that, in the case of conductors with particularly large cross-sections, current transmission or contact mediated by the contact medium is insufficient. In particular, sufficiently strong contact via the contact medium would require disadvantageously large installation spaces.

[0010] The present invention is based on the objective of creating a device for contacting a conductor which avoids the disadvantages of the prior art, in particular enabling more efficient current transmission.

[0011] According to the invention, this problem is solved by a device having the features mentioned in claim 1.

[0012] The present invention further aims to create a connection system that avoids the disadvantages of the prior art, in particular enabling more efficient power transmission. According to the invention, this objective is achieved by a connection system with the features specified in claim 11.

[0013] The device according to the invention for contacting an electrical conductor, in particular a cable conductor of a power supply cable, comprises at least one connecting body that defines a receiving space into which the conductor to be contacted can be inserted with its end face, and a contact medium with a plurality of electrically conductive and adjacent contact elements introduced into the receiving space, with which the end face of the conductor can be electrically contacted. According to the invention, it is provided that the electrical conductor can be fixed in the receiving space, wherein a contact surface of the receiving space facing the conductor is designed such that electrical contact between the connecting body and the conductor is optimized.

[0014] The device according to the invention has the advantage that, in addition to a path provided by the contact medium applied to the front face, further current paths can also be used to significantly improve the contacting of the conductor and the resulting reduction in contact resistances.

[0015] By designing the contact surface of the receiving space facing the conductor in such a way as to optimize the electrical contact between the connecting body and the conductor, the current can flow from an outer area of ​​the conductor to the connecting body in a particularly efficient manner.

[0016] In contrast to devices known from the prior art, in which such a further flow path for the current has no practically relevant significance, the device according to the invention provides such a current path to a practically relevant extent by optimizing the contacting at the contact surface.

[0017] The device according to the invention has the advantage that it has an increased current-carrying capacity compared to the prior art and therefore lower electrical losses.

[0018] Furthermore, this allows for more compact designs, and associated components, especially in high and / or extra-high voltage installations, can be slimmer and therefore more economical and / or resource-efficient.

[0019] This is also advantageous if the device needs to be protected from environmental influences by special measures. The more compact the design, the less complex such protection against environmental influences can be. Thus, the device according to the invention enables a simple and economical electrical connection setup. Compared to the prior art, the length of current paths through the contact medium can be shorter in the device according to the invention, while at the same time the conductor cross-sections can be increased.

[0020] In particular, this can be achieved by specifically tailoring the receiving space, preferably with regard to its cross-sectional area, to the conductor to be contacted. This reduces the volume of the contact medium in the receiving space and thus a potential power loss that would occur when using conductors that are thinner than the receiving space in combination with adapter rings.

[0021] In the device according to the invention, it can be provided that, in particular, no separation of the mechanical and electrical functions of the individual components takes place.

[0022] In the device according to the invention, the contact surface offers one or more defined current paths. Thus, the conductor is contacted in a combined manner via its end face, there via the contact medium, and via its outer surface, there via the contact surface.

[0023] In an advantageous embodiment of the device according to the invention, it can be provided that the contact surface has one or more ribs in order to form at least one electrical line contact between the conductor and the connecting body.

[0024] The inventors have recognized that optimizing the contact surface for improved contact can be achieved particularly well by forming one or more ribs and / or grooves, or a contact groove, on the connecting body in a specific area of ​​the contact surface. In particular, it can be provided that at least one rib forms at least one electrical line contact between the conductor and the connecting body.

[0025] The formation of an electrical line contact has the particular advantage that it can be formed by a force-fit connection between the conductor and at least one rib, whereby a larger contact area is produced in comparison to a point contact and a higher force load and therefore a better fit of the two bodies to be connected can be achieved in comparison to a surface contact.

[0026] Alternatively or in addition to the rib, the contact at the contact surface can be optimized.

[0027] In an advantageous embodiment of the device according to the invention, the receiving space can be designed to be at least partially cylindrical, and the at least one rib can be formed at least partially axially and / or circumferentially on the contact surface. If the at least one rib is formed at least partially circumferentially on a contact surface designed as a cylindrical shell, the desired electrical line contact can be established simultaneously, and, for example, by deformation after the application of force, an additional positive-locking connection can be formed between the conductor and the connecting body. This results in a high degree of longitudinal force-locking between the conductor to be contacted and the connecting body.

[0028] This makes the device according to the invention particularly suitable for conductors with particularly large cross-sections, which place particularly high demands on pull-out forces.

[0029] The receiving chamber can have a diameter of 3 mm to 3000 mm, preferably 30 mm to 300 mm, and particularly preferably 100 mm. A contact and holding area surrounding the receiving chamber preferably has a wall thickness of 5 mm to 200 mm, and preferably 20 mm. These values ​​have proven to be a particularly suitable compromise between holding capacity, electrical resistance, and compact design.

[0030] In an advantageous further development of the device according to the invention, it can be provided that the connecting body has an interface area that is spaced away from and / or facing away from the receiving space and which is designed to form an electrical contact.

[0031] If the connecting body is at least approximately cylindrical, it is particularly advantageous if the interface area is designed as the interface surface of the connecting body on a side facing away from the receiving space.

[0032] By providing blunt ends on the device, for example, two devices according to the invention can be connected to each other at their respective interface areas.

[0033] However, the interface area can also be designed as a connection area to other electrical systems that are independent of the device.

[0034] For geometric reasons, it is particularly advantageous if the interface area is spaced away from and / or facing away from the recording area. This results in a great deal of design freedom and flexibility in the geometric arrangement of the interface area with its respective connecting partner.

[0035] In an advantageous further development of the device according to the invention, it can be provided that the connecting body is monolithic.

[0036] The monolithic design of the connector body allows for particularly good conductivity due to the material's continuity. The elimination of transition areas and additional contacts thus reduces power loss during current transmission between the conductor and a connection partner, which may be located downstream of the connector body.

[0037] In an advantageous embodiment of the device according to the invention, it can be provided that at least one clamping screw for clamping the conductor in the connecting body can be inserted into at least one threaded bore of the connecting body extending into the receiving space, wherein the clamping screw is preferably made of a conductive material.

[0038] It may be provided that at least one clamping screw is part of the device.

[0039] Due to the special design of the device according to the invention, the current flows not only via the end face of the conductor by means of the contact medium, but also via the outer surface of the connecting body and the at least one clamping screw, if one is screwed into the connecting body.

[0040] Advantageously, at least one clamping screw makes electrical contact with at least the outer layer of the conductor. This results in particularly high conduction efficiency and is especially suitable for standard conductor constructions with and without fillers or single-wire insulation.

[0041] For conductors with single-wire insulation, it is particularly advantageous to remove at least some of the insulation from the outer layer of the individual wires. This insulation removal can be achieved by sanding and / or by using at least one suitable clamping screw and / or a suitably designed contact surface, in particular one or more suitably designed ribs.

[0042] For this purpose, the clamping screw and / or the ribs are designed to be rough and / or sharp-edged in sections, for example.

[0043] If a threaded bore is provided on the connecting body into which at least one clamping screw can be inserted, the conductor can be clamped in the receiving space by means of the at least one clamping screw.

[0044] If the clamping screw itself is made of a conductive material, current can also be transported into the connecting body via the clamping screw. The clamping screw thus contributes to better contact of the conductor and preferably provides at least one additional flow path for the current to be transmitted.

[0045] It may be possible to implement the conductor using a retaining ring and clamping screws. In this case, the clamping screws may serve both for axial fixation of the conductor and for conducting current. This axial fixation prevents relative slippage between the connecting body and the conductor. This is particularly advantageous for maintaining contact force with the contact medium.

[0046] It can be provided that the aforementioned retaining ring also offers a defined current path. In particular, it can be provided that the retaining ring provides the contact surface. The conductor is thus radially enclosed by the retaining ring and contacted at it. The retaining ring itself therefore forms at least part of the receiving space. This creates a contact surface between the retaining ring and the connecting body when the retaining ring is inserted into the connecting body, which is preferably optimized for electrical contact. This can be achieved in an advantageously simple manner, since the retaining ring and the connecting body can be manufactured as precisely matched components with particularly high precision and thus particularly good contactability. In particular, the contact surfaces between the retaining ring and the connecting body can be provided with projections for forming line contacts.

[0047] It can therefore be provided that the retaining ring, in conjunction with at least one clamping screw, serves not only to clamp the conductor but also to transmit the electric current.

[0048] In an advantageous embodiment of the device according to the invention, it can be provided that several threaded bores are arranged radially asymmetrically, preferably partially on one side, in the connecting body.

[0049] If at least one clamping screw is arranged radially asymmetrically, i.e., not rotationally symmetrically distributed around the circumference of the conductor to be contacted, the conductor can be advantageously and simply pressed against the area of ​​the contact surface of the receiving chamber opposite the clamping screws by tightening the clamping screws. This allows particularly well-formed electrical line contacts to be produced in these opposing areas.

[0050] It is particularly advantageous if the clamping screws act on the conductor to be contacted at least approximately on one side. This results in an area of ​​the contact surface opposite the clamping screws in which a particularly high force is exerted between the conductor and the contact surface.

[0051] It can further be provided that, particularly in the case of an at least approximately cylindrical connecting body, the threaded bores are arranged only in a circular arc of a cross-section of the contact surface or the connecting body. Preferably, the central angle of the circular arc is 15° to 120°, preferably 90°. In an advantageous embodiment of the device according to the invention, it can be provided that 10% to 50% of the current flow between the conductor and the connecting body is conductable via the at least one clamping screw and / or the contact surface.

[0052] If the contact surface and the at least one clamping screw and / or the at least one threaded bore in the connecting body are designed such that 10% to 50%, preferably 20% to 40%, of the current flow between the conductor and the connecting body can be conducted through the aforementioned paths, namely the at least one clamping screw and / or the contact surface, then the device according to the invention can advantageously also be used for particularly large conductors, for example with conductor cross-sections of at least 500 mm². 2 , preferably at least 2,000 mm 2 , preferably at least 3,000 mm 2 , preferably at least 5,000 mm 2 , be used.

[0053] This can be achieved while maintaining a compact design and using only a small amount of contact medium.

[0054] The aforementioned improvement can also refer only to the connecting body without the clamping screw. The aforementioned improvement can also refer only to the clamping screw, particularly if it is part of the device. The aforementioned improvement can also refer to the clamping screw and the connecting body, particularly if the clamping screw is part of the device.

[0055] In an advantageous embodiment of the device according to the invention, it can be provided that the at least one clamping screw and / or the connecting body is at least partially made of aluminum, preferably of an aluminum alloy.

[0056] The inventors have recognized that, through suitable measures, a significant contribution of the contact surface to the contacting between the connecting body and the conductor can be achieved while simultaneously achieving high longitudinal force interlocking.

[0057] The inventors have recognized in particular that a suitable material selection for the at least one clamping screw and / or the connecting body combines high electrical conductivity with the provision of the desired longitudinal force locking.

[0058] It was also recognized that making at least one clamping screw and / or the connecting body at least partially from aluminium would best achieve the stated objective.

[0059] It was determined that aluminum alloys are the most suitable. It may be provided that at least one clamping screw and / or the connecting body is at least partially made of brass.

[0060] It may be provided that at least one clamping screw and / or the connecting body is at least partially made of a material with an electrical conductivity of at least 12 S / m.

[0061] A particular advantage of the aforementioned embodiments of the device according to the invention is that they are able to fix conductors of particularly large cross-sections with sufficient longitudinal force locking and at the same time cope with the large currents that occur particularly with such large conductors by improving the contacting and using additional contact paths.

[0062] The aforementioned improvement can also refer only to the connecting body without the clamping screw. The aforementioned improvement can also refer only to the clamping screw, particularly if it is part of the device. The aforementioned improvement can also refer to the clamping screw and the connecting body, particularly if the clamping screw is part of the device.

[0063] In an advantageous further development of the device according to the invention, it can be provided that the at least one clamping screw has a clamping section and a threaded section which can be separated from each other when the conductor is clamped.

[0064] The clamping screw used may in particular be a clamping screw which is described, for example, in DE 10230502 A1 and / or EP 1378671 B1.

[0065] For this purpose, the clamping screw can be provided as part of the device according to the invention.

[0066] The clamping screws described above allow the desired conductor cross-sections to be fixed in a particularly secure manner.

[0067] The screw geometries for the clamping screw known from the prior art, which are essentially based on a truncated cone, may not be sufficient to absorb the longitudinal forces occurring on the conductor.

[0068] Rather, the special design of the clamping screw, which has a threaded section and a clamping section, allows a sufficiently high clamping force to be applied even with the asymmetrical or one-sided contact described above, in order to hold the conductor firmly in the receiving space and at the same time keep the contact medium in consistently tight contact with the end face of the conductor.The clamping screw can be configured to exert a force on a target area of ​​the electrical conductor and preferably comprises at least: the clamping section, which can also be referred to as the working section, for bearing against the target area and applying the force to the target area, and a support section, which can in particular correspond to the threaded section, for support against an surrounding area, especially the connecting body, in order to dissipate the force. The working section can preferably be connected to the support section via a predetermined breaking point such that when the support section is screwed into the surrounding area and the force is applied, the predetermined breaking point is broken. It can be provided that the working section has a protrusion in at least one initial state, which is arranged in a central region of the working section.

[0069] The clamping screw described above allows for a 20% increase in pull-out strength compared to a flat working section, due to its raised design. This is advantageously achieved with otherwise identical dimensions. As a result, the clamping screw enables a particularly resource-efficient design and thus also a particularly resource-efficient contact of the electrical conductor.

[0070] It can be provided that the electrical conductor can be contacted particularly advantageously by means of the raised section of the clamping screw. The preferably cylindrical raised section can penetrate between the conductor layers and thus generate more force in the inner individual wire layers of the conductor. Preferably, a cylindrical axis of the raised section and a cylindrical axis of the support section coincide at least approximately.

[0071] The clamping screw may be provided with a spring section, arranged to press the working section resiliently against the target area, the spring section preferably being formed integrally with the support section.

[0072] It may be provided that, by means of the elevation, at least one non-conductive intermediate layer of the electrical conductor is displaced in order to enable transverse conductivity of the electrical conductor in the target area. It may be provided that interfering intermediate layers are displaced in order to create electrically conductive contact points.

[0073] In particular, it can be provided that the raised section generates a force or pressure inside the conductor, causing the individual conductor strands to come into electrical contact with each other, allowing current to flow transversely to the axially oriented individual wires of the electrical conductor. This establishes or improves the transverse conductivity of the electrical conductor. This, in turn, can serve to further optimize the external contact or contribute to optimizing the electrical contact between the connecting body and the conductor. It can be provided that the effective section, perpendicular to a direction of the longitudinal extent of the support section, has an edge section that surrounds the raised section laterally, and especially radially, on all sides, and that the raised section projects beyond the edge section in the direction of the longitudinal extent of the support section opposite the support section.

[0074] It can be provided that the elevation at its highest point has a height relative to the edge section which is between 10% and 70%, preferably between 20% and 50%, particularly preferably 40% to 50% of a lateral, especially radial and / or half-lateral, extent of the elevation.

[0075] The raised section may have a flat end surface for contact with the electrical conductor, and the edge section may have a flat edge surface for contact with the electrical conductor, the edge surface and the raised section being arranged parallel to each other. A transition area with a sigmoidal cross-section may be provided between the end surface and the edge surface, the transition area preferably having a lateral, and in particular radial, extent corresponding to 5% to 30%, preferably 15% to 25%, of the lateral, and in particular radial, extent of the raised section.

[0076] The invention further relates to a connection system with the features mentioned in claim 11.

[0077] The connection system according to the invention comprises an electrical conductor, in particular a cable conductor of a power supply cable, and at least one device according to the invention. It is provided that the electrical conductor is fixed in the receiving space, with electrical contact between the connecting body and the conductor being optimized.

[0078] The connection system according to the invention represents a particularly advantageous connection, since in addition to the contacting through the contact medium and the end face of the conductor, a flow path for the current via the contact surface is also used in an optimized and therefore significant manner.

[0079] In an advantageous further development of the connection system according to the invention, it can be provided that two electrical conductors are connected to each other by means of a device according to the invention.

[0080] The connection system according to the invention is particularly suitable for joining two blunt conductor ends. Typically, conductors, especially those with large cross-sections, have a finite length, for example, several hundred meters. Therefore, when laying conductors over long distances, it is necessary to join the individual conductor sections at their blunt ends. The connection system according to the invention enables this in a particularly simple and efficient manner through the use of the device according to the invention.

[0081] In particular, it may be provided that interface areas of the devices are brought into contact with each other while lying against one another.

[0082] At this point, a procedure for making contact is also revealed.

[0083] The process of contacting an electrical conductor, in particular a cable conductor of a power supply cable, involves at least the following steps:

[0084] Inserting the conductor to be contacted with its end face into a receiving space bounded by a connecting body,

[0085] Defining the electrical conductor in the receiving space, wherein a contact surface of the receiving space facing the conductor is designed in such a way as to optimize electrical contact between the connecting body and the conductor,

[0086] Introducing a contact medium with a multitude of electrically conductive and adjacent contact bodies into the receiving space, with which the end face of the conductor can be electrically contacted.

[0087] Preferably, but not necessarily, the steps are carried out in the specified chronology.

[0088] Features described in connection with one of the subject matter of the invention, in particular those provided by the device, the disclosed method, and the connection system according to the invention, can also be advantageously implemented for the other subject matter of the invention. Advantages mentioned in connection with one of the subject matter of the invention can also be understood as relating to the other subject matter of the invention.

[0089] It should also be noted that terms such as "comprehensive," "exhibiting," or "with" do not exclude other characteristics or steps. Furthermore, terms such as "a" or "the," which indicate a singular number of steps or characteristics, do not exclude a plurality of characteristics or steps—and vice versa.

[0090] Exemplary embodiments of the invention are described in more detail below with reference to the drawing.

[0091] The figures each show preferred embodiments in which individual features of the present invention are combined with one another. Features of an embodiment can also be implemented independently of the other features of the same embodiment and can therefore be readily combined by a person skilled in the art to form further meaningful combinations and subcombinations with features of other embodiments. In the figures, functionally identical elements are provided with the same reference numerals.

[0092] They show schematically:

[0093] Figure 1 shows a schematic representation of a possible embodiment of a device according to the invention in a sectional view;

[0094] Figure 2 shows a schematic representation of another possible embodiment of a device according to the invention in a sectional view;

[0095] Figure 3 shows a schematic representation of another possible embodiment of a device according to the invention in a perspective view;

[0096] Figure 4 shows a schematic representation of a possible embodiment of a connection system according to the invention in a sectional view; and

[0097] Figure 5 shows a schematic representation of another possible embodiment of a connection system according to the invention in a sectional view.

[0098] Figure 1 shows a schematic representation of a possible embodiment of a device 1 for contacting an electrical conductor 2, in particular a cable conductor of a power supply cable. The device 1 comprises at least one connecting body 3, which defines a receiving space 4 in which the conductor 2 to be contacted can be inserted with its end face 5. Furthermore, the device 1 comprises a contact medium 6 with a plurality of electrically conductive contact bodies 7 inserted into the receiving space 4 and abutting one another. The end face 5 of the conductor 2 can be electrically contacted with the contact medium 6. The electrical conductor 2 can also be fixed in the receiving space 4. A contact surface 8 of the receiving space 4 facing the conductor 2 is designed such that electrical contact between the connecting body 3 and the conductor 2 is optimized.

[0099] The contact surface 8 is preferably formed on a contact and retaining area 8a of the connecting body 3. The preferably annular contact and retaining area 8a fulfills a hybrid function to simultaneously retain and contact the conductor 2. The contact and retaining area 8a can be formed integrally with the connecting body 3 or as a separate retaining ring.

[0100] In the embodiment shown in Figure 1, the contact surface 8 preferably has one or more ribs 9 to form at least one line contact between the conductor 2 and the connecting body 4. In the embodiments shown below, the at least one rib 9 is designed as a trapezoidal projection.

[0101] However, other embodiments are also possible in which the rib 9 is interrupted. In this case, the electrical line contact is formed section by section. By reducing the contact area, a better fit between the rib 9 and the conductor 2 can be achieved.

[0102] In the embodiment according to Figure 1, the connecting body 3 has an interface area 10 that is spaced apart from and / or facing away from the receiving space 4 and is designed to form an electrical contact.

[0103] In the embodiment shown in Figure 1, the interface area 10 comprises circumferential lamellae 17 for contacting the connecting body 3, for example, with a socket.

[0104] In the embodiment shown in Figure 1, the interface area 10 comprises the end face 10a of the connecting body 3.

[0105] However, the device 1 according to Figure 1 or Figure 2 is preferably designed as a plug for use with a compatible socket (not shown). With such contact of the interface area 10 with a socket, the end face 10a is not involved, or only to a small extent, in the current transport via the lamellae 17.

[0106] In embodiments not shown, the interface area 10 may also be designed differently than shown in Figures 1 or 2, depending on the application.

[0107] In the embodiment shown in Figure 1, preferably at least one clamping screw 11 for clamping the conductor 2 in the connecting body 3 can be inserted into at least one threaded bore 12 of the connecting body 3 extending into the receiving space 4.

[0108] The clamping screw 11, which can preferably be considered as part of the device 1, is particularly preferably made of a conductive material.

[0109] Figure 2 shows a schematic representation of another possible embodiment of the device 1.

[0110] In contrast to the embodiment shown in Figure 1, several threaded bores 12 are provided, which are preferably arranged radially asymmetrically, and particularly preferably on one side, in the connecting body 3. In the sectional view of the embodiment shown in Figure 2, two threaded bores 12 and two clamping screws 11 can be seen.

[0111] Preferably 2 to 12, preferably 7 threaded holes 12 or clamping screws 11 can be provided.

[0112] In the embodiment shown in Figure 2, the at least one clamping screw 11 has a clamping section 13 and a threaded section 14, which can be separated from each other when the conductor 2 is clamped. This allows the conductor 2 to be pressed particularly well against the ribs 9, which are arranged on the side of the contact surface 8 opposite the clamping screws 11.

[0113] In the embodiments shown in Figures 1 and 2, the connecting body 3 is preferably monolithic.

[0114] This is particularly evident in the hatching of the drawings.

[0115] Furthermore, in the embodiments shown in Figures 1 and 2, preferably 10% to 50% of the current flow between the conductor 2 and the connecting body 3 is conductive via at least one clamping screw 11 and / or the contact surface 8.

[0116] Furthermore, in the aforementioned embodiment, the at least one clamping screw 11 and / or the connecting body 3 is at least partially made of aluminum, preferably of an aluminum alloy.

[0117] For further reference symbols, please refer to Figure 1.

[0118] Figure 3 shows a schematic representation of another embodiment of the device 1 in a perspective view.

[0119] The embodiment shown in Figure 3 essentially corresponds to a perspective view of the embodiment of the device 1 shown in section view in Figure 2.

[0120] In the embodiment according to Figure 3, preferably five threaded bores 12 are provided.

[0121] From the representation of the device 1 according to Figure 3, it can be seen that the device 1 preferably has a substantially cylindrical basic shape. Furthermore, it can be seen that with the device 1, the receiving chamber 4 is preferably at least partially cylindrical and the at least one rib 9 is preferably formed at least partially axially and / or circumferentially around the contact surface 8.

[0122] Figures 2 and 3 also show a filling opening 15 with a closing device 15a for the contact medium 6 into the receiving chamber.

[0123] In the illustrations according to Figures 1 and 2, a force element 16 is also shown, which preferably serves to apply force to the contact medium 6.

[0124] Circumferential lamellae 17 according to figures 1 and 2 can be used as part of the interface area 10 for contacting the connecting body 3, for example with a socket.

[0125] Figure 4 shows a schematic representation of a possible embodiment of a connection system 20 in a sectional view.

[0126] The connection system 20 comprises at least one electrical conductor 2, in particular a cable conductor of a power supply cable, and at least one device 1, as shown, for example, in Figures 1 to 3.

[0127] In the connection system 20, the electrical conductor 2 is fixed in the receiving space 4 and an electrical contact between the connecting body 3 and the conductor 2 is optimized along the contact surface 8.

[0128] In the embodiment of the connection system 20 shown in Figure 4, two electrical conductors 2 are preferably connected to each other by means of one of the devices 1 according to the figures described above. For better visibility of the assembly, however, only one of the two conductors 2, namely the right one, is shown inserted into the receiving space 4.

[0129] In the connection system 20 according to Figure 4, the devices 1 are preferably arranged coaxially and are preferably connected to each other by means of connecting screws 21 which run obliquely to a common longitudinal axis of the devices 1 in such a way that a contact pressure on the end faces 10a enables sufficient electrical contact of the same.

[0130] Possible embodiments of the device 1 can also be seen from the illustration in Figure 4, in which the device 1 can have through holes and / or bores with internal threads in the interface area 10.

[0131] Preferably, countersunk areas 22 are also provided to prevent the connecting screws 21 from protruding beyond the contour of the connecting body 3. For reference numerals, see Figures 1 to 3.

[0132] Figure 5 shows a schematic sectional view of a possible embodiment of the connection system 20.

[0133] In contrast to the embodiment shown in Figure 4, the connecting body 3 in the embodiment shown in Figure 5 is not monolithic.

[0134] In particular, a retaining ring 23 is provided.

[0135] This results in contact resistances at the mating surfaces of the individual components compared to the situation shown in Figure 4, which can reduce conductivity. However, it is possible to design the mating surfaces in such a way that contact resistance is minimized even in the embodiment shown in Figure 5.

[0136] According to the embodiment shown in Figure 5, the electrical contact between the contact surface 8 and the conductor 2 can be optimized by an electrically conductive coating on the contact surface 8. For this reason, no ribs 9 are visible in the embodiment shown in Figure 5.

[0137] Regarding the reference symbols, please refer to Figures 1 to 4.

[0138] In Figures 1, 2, and 4, the clamping section 13 preferably has a protrusion in a central region. The protrusion is preferably surrounded by an edge section and improves the pull-out strength of the conductor 2. Furthermore, the protrusion can preferably extend into the conductor 2, creating transverse conductivity there and thus contributing to the optimization of the electrical contact between the connecting body 3 and the conductor 2.

[0139] Reference symbol list:

[0140] 1 Device

[0141] 2 electrical conductors

[0142] 3 Connecting bodies

[0143] 4 Recording room

[0144] 5 front end

[0145] 6 Contact medium

[0146] 7 contact bodies

[0147] 8 Contact area

[0148] 8a Contact and holding area

[0149] 9th rib

[0150] 10 Interface area

[0151] 10a Front surface

[0152] 11 Clamping screw

[0153] 12 threaded holes

[0154] 13 Clamping section

[0155] 14 Thread section

[0156] 15 Filling opening

[0157] 15a Locking device

[0158] 16 Force element

[0159] 17 lamella

[0160] 20 connection system

[0161] 21 Connecting screw

[0162] 22 Recessed area

[0163] 23 retaining ring

Claims

Patent claims 1. Device (1) for contacting an electrical conductor (2), in particular a cable conductor of a power supply cable, comprising at least a connecting body (3) which defines a receiving space (4) into which the conductor (2) to be contacted can be inserted with its end face (5), and a contact medium (6) with a plurality of electrically conductive and adjacent contact bodies (7) introduced into the receiving space (4) with which the end face (5) of the conductor (2) can be electrically contacted, characterized in that the electrical conductor (2) can be fixed in the receiving space (4), wherein a contact surface (8) of the receiving space (4) facing the conductor (2) is designed such that electrical contact between the connecting body (3) and the conductor (2) is optimized.

2. Device (1) according to claim 1, characterized in that the contact surface (8) has one or more ribs (9) to form at least one electrical line contact between the conductor (2) and the connecting body (4).

3. Device (1) according to claim 2, characterized in that the receiving space (4) is at least partially cylindrical and the at least one rib (9) is formed at least partially axially and / or circumferentially on the contact surface (8).

4. Device (1) according to one of claims 1 to 3, characterized in that the connecting body (3) has an interface area (10) spaced apart and / or facing away from the receiving space (4), which is configured to form an electrical contact.

5. Device (1) according to one of claims 1 to 4, characterized in that the connecting body (3) is monolithic.

6. Device (1) according to one of claims 1 to 5, characterized in that at least one clamping screw (11) for clamping the conductor (2) in the connecting body (3) is inserted into at least one threaded bore (12) extending into the receiving space (4) of the connecting body (3) can be inserted, wherein the clamping screw (11) is preferably made of a conductive material.

7. Device (1) according to claim 6, characterized in that several threaded bores (12) are arranged radially asymmetrically, preferably partially on one side, in the connecting body (3).

8. Device (1) according to one of claims 6 or 7, characterized in that 10% to 50% of a current flow between the conductor (2) and the connecting body (3) is conductive via at least one clamping screw (11) and / or the contact surface (8).

9. Device (1) according to one of claims 1 to 8, characterized in that the at least one clamping screw (11) and / or the connecting body (3) is at least partially made of aluminium, preferably of an aluminium alloy.

10. Device 0 according to one of claims 7 to 9, characterized in that the at least one clamping screw (11) has a clamping section (13) and a threaded section (14) which can be separated from each other when the conductor (2) is clamped.

11. Connection system (20) with at least one electrical conductor (2), in particular a cable conductor of a power supply cable, and at least one device (1) according to one of claims 1 to 10, wherein the electrical conductor (2) is fixed in the receiving space (4), wherein an electrical contact between the connecting body (3) and the conductor (2) is optimized.

12. Connection system (20) according to claim 11, characterized in that two electrical conductors (2) are connected to each other by means of a device (1) according to one of claims 1 to 10.

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