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EP-4736273-A1 - DEVICE AND METHOD FOR EXERTING A FORCE ON A TARGET REGION OF AN ELECTRICAL CONDUCTOR, AND CONNECTION SYSTEM

EP4736273A1EP 4736273 A1EP4736273 A1EP 4736273A1EP-4736273-A1

Abstract

The invention relates to a device (1) for exerting a force (2) on a target region (3) of an electrical conductor (4), at least comprising: - an active portion (5) for bearing against the target region (3) and for applying the force (2) to the target region (3), and - a support portion (6) for support on a surrounding region (7) in order to dissipate the force (2), - wherein the active portion (5) is connected to the support portion (6) via a predetermined breaking point (8) in such a way that, as the support portion (6) is screwed into the surrounding region (7), the predetermined breaking point (8) is broken when the force (2) is exerted. According to the invention, at least in an initial state, the active portion (5) has an elevation (9) arranged in a central region of the active portion (5).

Inventors

  • GROEZINGER, ANDREAS

Assignees

  • Pfisterer Kontaktsysteme GmbH

Dates

Publication Date
20260506
Application Date
20250806

Claims (19)

  1. 1. Device (1) for exerting a force (2) on a target area (3) of an electrical conductor (4), comprising at least: an active section (5) for contact with the target area (3) and for applying the force (2) to the target area (3), and a support section (6) for support on an surrounding area (7) in order to dissipate the force (2), wherein the active section (5) is connected to the support section (6) via a predetermined breaking point (8) such that when the support section (6) is rotated into the surrounding area (7) when the force (2) is exerted, the predetermined breaking point (8) is broken, and the active section (5) has at least in one initial state a protrusion (9) which is arranged in a central area of the active section (5).
  2. 2. Device (1) according to claim 1, d a d u r c h g e k e n n z e i c h n e t , that the working section (9) perpendicular to a direction of a longitudinal extension (10) of the support section (6) has an edge section (11) that surrounds the elevation (9) laterally, in particular radially, on all sides.
  3. 3. Device (1) according to claim 2, d a d u r c h g e k e n n z e i c h n e t , that the elevation (9) projects towards the edge section (11) in the direction of the longitudinal extent (10) of the support section (6) away from the support section (6).
  4. 4. Device (1) according to claim 2 or 3, characterized by the fact that the elevation (9) at its highest point has a height relative to the edge section (11) which is between 10% and 70%, preferably between 20% and 50%, particularly preferably 40% to 50% of a lateral, in particular radial, extent of the elevation (9).
  5. 5. Device (1) according to one of claims 2 to 4, d a d u r c h g e ke n n z e i c h n e t , that the elevation (9) has a height of 1 mm to 4 mm, preferably 2 mm to 3 mm, at its highest point relative to the edge section (11).
  6. 6. Device (1) according to one of claims 2 to 5, characterized in that a lateral, in particular radial, extension of the elevation (9) corresponds to a 0.1-fold to 5-fold, preferably a 1-fold to 2-fold extension of a lateral, in particular radial, extension of the marginal section (11).
  7. 7. Device (1) according to one of claims 2 to 6, d a d u r c h g e k e n n z e i c h n e t , that the elevation (9) has a flat end surface (12) for contact with the electrical conductor (4) and the edge section (11) has a flat edge surface (13) for contact with the electrical conductor (4), wherein the edge surface (13) and the end surface (12) are arranged parallel to each other.
  8. 8. Device (1) according to claim 7, d a d u r c h g e k e n n z e i c h n e t , that between the end surface (12) and the edge surface (13) there is a transition area (14) which has a sigmoidal cross-section (15).
  9. 9. Device (1) according to claim 8, d a d u r c h g e k e n n z e i c h n e t , that the transition area (14) has a lateral, in particular radial, extent which corresponds to 5% to 30%, preferably 15% to 25% of a lateral, in particular radial extent of the elevation (9).
  10. 10. Device (1) according to one of claims 1 to 9, d a d u r c h g e ken n z e i c h n e t , that the working section (5) has a rounding (17) on its lateral, in particular radial, outer edge (16), preferably in cross-section quarter-circle.
  11. 11. Device (1) according to claim 10, d a d u r c h g e k e n n z e i c h n e t , that the rounding (17) has a radius which corresponds to 0.5 times to 1.25 times, preferably 0.7 times to 0.9 times, the thickness of the edge section (11) in the direction of the longitudinal extent (10) of the support section (6).
  12. 12. Device (1) according to one of claims 1 to 11 , d a d u r c h g e ken n z e i c h n e t , that the elevation (9) is at least approximately cylindrical.
  13. 13. Device (1) according to one of claims 1 to 12, characterized in that the active section (5) has a circular outer contour, in particular is circularly symmetrical.
  14. 14. Method for exerting a force (2) on a target area (3) of an electrical conductor (4), comprising at least the following steps: a) supporting a support section (6) on an surrounding area (7) to dissipate the force (2), b) attaching an active section (5) to the target area (7), c) applying the force (2) to the target area (3), d) breaking a predetermined breaking point (8) through which the active section (5) is connected to the support section (6) when the support section (6) is rotated into the surrounding area (7) to exert the force (2), e) deformation of the electrical conductor (4) by the active section (5) such that the force (2) adapts the electrical conductor (4) at least partially to a shape of a protrusion (9) of the active section (5), which in is arranged in a central area of the active section (5).
  15. 15. Method according to claim 14, d a d u r c h g e k e n n z e i c h n e t , that in step e) the protrusion (9) burrows into the electrical conductor (4), wherein the electrical conductor (4) beyond the protrusion (9) rests against an edge section (11) of the functional section (5) which surrounds the protrusion (9).
  16. 16. Method according to claim 14 or 15, wherein the elevation (9) in step e) penetrates between conductor layers (4a) of the electrical conductor (4).
  17. 17. Method according to claim 14, 15 or 16, characterized by the fact that at least one non-conductive intermediate layer (24) of the electrical conductor (4) is displaced to enable transverse conductivity of the electrical conductor (4) in the target area (3).
  18. 18. Method according to one of claims 14 to 17, characterized in that the electrical conductor (4) has a cross-section of at least 120 mm² , and/or the electrical conductor (4) has at least one filler (25).
  19. 19. Connection system (30) comprising a device (1) according to one of claims 1 to 13 and a clamping element (31), wherein the support section (6) can be fixed in a primary bore (32) of the clamping body (31), and the electrical conductor (4) can be inserted in a secondary bore (33) of the clamping body (31) such that the target area (3) can be arranged on the active section (5) and acted upon by the force (2).

Description

Device and method for exerting a force on a target area of an electrical conductor, as well as connection system 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. The invention relates to a device for exerting a force on a target area of an electrical conductor, comprising at least: an active section for contacting the target area and for applying the force to the target area, and a support section for support against an surrounding area in order to dissipate the force; wherein the active section is connected to the support section via a predetermined breaking point such that when the support section is rotated into the surrounding area during the exertion of the force, the predetermined breaking point is broken. The invention further relates to a method for exerting a force on a target area of an electrical conductor, comprising at least the following steps: a) supporting a support section on an surrounding area to dissipate the force, b) attaching an active section to the target area, c) applying the force to the target area, d) breaking a predetermined breaking point, via which the active section is connected to the support section, when the support section is rotated into the surrounding area to exert the force. The invention also relates to a connection system. Screw connections on pipes and/or cables are known from the general state of the art. From EP 1 693 926 A1, a device for clamping and electrically contacting a connecting cable is known. From EP 1 693 926 A1, a terminal body for said device for clamping and electrically contacting a connecting cable, in particular a finely stranded transformer connecting cable, is also known. DE 10 2006 048 177 A1 discloses a fastening device, in particular a shear bolt, with a thread which has a first section. From EP 1 378 671 B1 a clamping screw for clamping and electrically contacting a connecting cable, in particular a fine-stranded transformer connecting cable, is disclosed, comprising a force application surface as well as a threaded section rotatable about a longitudinal axis and a clamping piece section. EP 2 867 547 B1 discloses a shear bolt, in particular for a device for screw clamping electrical conductors, with a threaded section for screwing the shear bolt into a clamping body. From DE 10 2014 012 296 A1 a multiple terminal for clamping and/or contacting electrical conductors or overhead lines or ropes is known with a terminal block which has at least one contacting channel with a front or rear contacting opening. DE 10 2015 013 011 A1 discloses a terminal block for electrical energy meters consisting of a housing made of electrically insulating material with side and end walls and a wall unit that limits the housing downwards. US Patent 2019/0115674 describes an adjusting screw for connecting conductors to electrical terminals, such as a terminal block on a load panel. The screw comprises a screw body and a screw surface. The screw surface fits into the screw body and is movable along the axis of the screw body. A disadvantage of the methods known from the prior art for contacting conductors is that under high loads, especially pull-out forces, a sufficiently firm contact with sufficiently reliable current transmission can only be achieved using very large dimensioned equipment. The present invention is based on the objective of creating a device for exerting a force on a target area of an electrical conductor, which avoids the disadvantages of the prior art, in particular enabling reliable contact. According to the invention, this problem is solved by a device having the features mentioned in claim 1. The present invention further aims to provide a method for exerting a force on a target area of an electrical conductor, which avoids the disadvantages of the prior art, in particular enabling reliable contact. According to the invention, this problem is solved by a method with the features mentioned in claim 14. The present invention also aims to create a connection system that avoids the disadvantages of the prior art, in particular enabling reliable contact of an electrical conductor. According to the invention, this problem is solved by a connection system with the features mentioned in claim 19. The device according to the invention for exerting a force on a target area of an electrical conductor comprises at least: an active section for contacting the target area and for applying the force to the target area, and a support section for support against an surrounding area in order to dissipate the force, wherein the active section is connected to the support section via a predetermined breaking point in such a way that when the support section is rotated into the surrounding area during the exertion of the force, the predetermined breaking point is broken. According to the invention, the active section has at least one initial state