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JP-7856773-B2 - Cable joint

JP7856773B2JP 7856773 B2JP7856773 B2JP 7856773B2JP-7856773-B2

Inventors

  • ランゲンス，アヒム

Assignees

  • ハーエスペー ホッホシュパンヌングスゲレーテ ゲゼルシャフト ミット ベシュレンクテル ハフツング

Dates

Publication Date
20260511
Application Date
20211130

Claims (7)

  1. A cable joint (1) for connecting two current conductor parts for conducting direct current, - Control member (3), - A conductive connector (2) surrounded by the control member (3), wherein the connector (2) has a first receiver (5) and a second receiver (6), and the conductor end (7) of the first conductive member (8) can be introduced into the first receiver (5) to form an electrical contact between the connector (2) and the conductor end (7) of the first conductive member (8), and the conductor end of the second conductive member can be introduced into the second receiver (6) to form an electrical contact between the connector (2) and the conductor end of the second conductive member, It has, The control member (3) has electrically insulating, spaced-apart, concentric conductive control inserts (11-17) for resistive electric field control. The cable joint (1) further includes a charge conductor (18), the charge conductor (18) is provided on the outer surface of the control member (3), is electrically connected to the outermost control insert (11), and is configured to discharge a surface charge carrier formed on the surface of the control member (3). Cable joint.
  2. A cable joint (1) according to claim 1, The control member (3) is impregnated with resin in the cable joint (1).
  3. A cable joint (1) according to claim 1 or 2, The control member (3) is a cable joint (1) having an dielectric strength of at least 320 kV.
  4. A cable joint (1) according to any one of claims 1 to 3, The connector (2) forms a detachable connection by press-fitting with the first and second conductor ends of the cable joint (1).
  5. A cable joint (1) according to any one of claims 1 to 4 , A mounting flange (21) is provided on the outside of the control member (3), and the flange (21) is configured for connection with the retaining device (22) of the first conductive member (8) in the cable joint (1).
  6. A cable joint (1) according to any one of claims 1 to 5 , A cable joint (1) comprising a control member (3) having first and second openings (9, 10), the first and second openings (9, 10) each being formed in a conical shape, the conductor end (7) of the first conductive member (8) being guided through the first opening (9) to form an electrical connection between the connector (2) and the conductor end (7) of the first conductive member (8), and the conductor end of the second conductive member being guided through the second opening (10) to form an electrical connection between the connector (2) and the conductor end of the second conductive member.
  7. A high-voltage current supply system for guiding a direct current through first and second cables, A high-voltage energizing system in which the first and second cables are mechanically and electrically connected to each other by a cable joint as described in any one of claims 1 to 6 .

Description

This invention relates to a cable joint. In low-voltage technology, cable joints are known as branch and connection joints for electrical installations. In high-voltage technology (for operating voltages of 300 kV or higher), the requirements for cable connections regarding insulation and charge loads are significantly higher. Furthermore, high-voltage cables, in particular, are known to have length limitations in their manufacture. Especially long connections of electrical conductors occur in high-voltage DC transmission. The present invention will be further described below based on the embodiments shown in the drawings. This is a schematic diagram of a first embodiment of the cable joint according to the present invention.This is a schematic diagram of a second embodiment of the cable joint according to the present invention. Figure 1 shows a cable joint 1 for connecting two current conductor sections. The cable joint 1 has a connector 2 whose longitudinal side is surrounded by a control member 3. The dashed line 4 suggests the central axis of the device, which can also be interpreted as the longitudinal axis of the cable joint. The connector 2 has a first receiver 5 and a second receiver 6. The conductor end 7 of the cable 8 is introduced into the first receiver 5 by passing through the conical first opening 9 of the control member 3, thereby forming an electrical connection between the conductor end 7 and the connector 2. Receivers 5 and 6 may have a suitable connection system, such as an inner plate, to assist contact. The intermediate chamber 19 between the conductor end 7 and the control member 3 is filled with a silicon material 19. To form an electrical connection with the second conductor end of the second cable, the control member is provided with a second conical opening 10 and a second receiver 6. The connector contains a conductive material, such as copper or aluminum. The control member 3 is positioned concentrically with the connector 2. The control member 3 has concentric control inserts 11-17 for electric field control. In the illustrated example, the control inserts 11-17 are formed as aluminum foil. The control inserts are spaced apart by an insulating layer. In the illustrated example, the insulating layer is resin-impregnated paper. A charge deductor 18 is positioned on the outside of the control member 3, and this is electrically connected to the outermost control insert 11. The charge deductor 18 guides the surface charge generated during DC operation to ground. The cable joint 1 further comprises a housing 20 and a mounting flange 21. The mounting flange 21 is mechanically connected to the cable portion 8 retaining device 22 during operation of the cable joint 1. Figure 2 shows another cable joint 30. The cable joint 30 has a connector 31 whose longitudinal side is surrounded by a control member 32. The configuration of the control member 32 is substantially equivalent to the structure of the control member 3 of the cable joint 1 in Figure 1. The difference from the embodiment in Figure 1 is that the control member 32 has conical ends on both sides that taper outward in the axial direction. Between the housing 33 of the cable joint 30 and the control member 32, intermediate chambers 34 and 35 are provided on both sides of the cable joint 30, respectively. The intermediate chambers 34 and 35 serve to accommodate the mounting members of the cable ends 36 and 37 to be connected, respectively. For insulating fixation, flexible insulating material can be further provided in the intermediate chambers to surround the cable ends 36 and 37. The mounting flange 38 on the outside of the housing 33 has a function equivalent to the mounting flange 21 of the cable joint 1 in Figure 1.