Sleeve for a power cable

Patent metadata

Field	Value
Publication number	US-9460832-B2
Application number	US-201414765440-A
Country	US
Kind code	B2
Filing date	Jan 29, 2014
Priority date	Feb 1, 2013
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Sleeve ( 1 ) for a high- or medium-voltage power cable ( 120 ) having an inner conductor ( 130 ). The sleeve comprises (i) a tubular sleeve body ( 10 ) having an electrically conductive or semiconductive first axial electrode section ( 60 ), and (ii) a circuit board ( 30 ). The sleeve is radially expandable or shrinkable. It can be arranged radially outward of the inner conductor, such hat the first axial electrode section is radially separated from the inner conductor by at least an electrically insulating spacer layer ( 140 ). The circuit board is at least partially arranged radially outward of the sleeve body and comprises an electrical contact ( 100 ) which is electrically connected with the first axial electrode section.

First claim

The invention claimed is:

1. Sleeve for a high- or medium-voltage power cable, the cable comprising an inner conductor defining axial and radial directions,
wherein the sleeve comprises
a tubular sleeve body having a first axial electrode section, which section is electrically conductive or semiconductive,

wherein the sleeve is radially expandable and arrangeable radially outward of the inner conductor when expanded, such that the first axial electrode section is radially separated from the inner conductor by at least an electrically insulating spacer layer,
and the sleeve further comprises a circuit board, at least partially arranged radially outward of the sleeve body, comprising a first electrical contact which is electrically connected with the first axial electrode section.

2. Sleeve according to claim 1 , further comprising an electrically non-conductive jacket, at least partially arranged radially outward of the sleeve body, and at least partially arranged radially outward of the circuit board.

3. Sleeve according to claim 1 , wherein the first axial electrode section is operable to form an electrode of a sensing capacitor of a voltage sensor for sensing a voltage of the inner conductor of the power cable.

4. Sleeve according to claim 1 , wherein the circuit board comprises a first major surface and a second major surface, and wherein the first electrical contact is arranged on the first major surface and comprises a conductive region, arranged on the first major surface, wherein the conductive region provides an extended contact area and is in mechanical and electrical contact with the first axial electrode section.

5. Sleeve according to claim 2 , wherein the circuit board comprises an extension section, which extends, in an axial direction, further than the jacket, so that a portion of the extension section is externally accessible.

6. Sleeve according to claim 2 , wherein the sleeve body comprises a second axial electrode section, which is coaxially aligned with the first axial electrode section, and which is electrically conductive or semiconductive, wherein the first axial electrode section and the second axial electrode section are separated by a first axial separation section which is electrically non-conductive.

7. Sleeve according to claim 6 , wherein the circuit board comprises a first major surface and a second major surface and a second electrical contact, and wherein the first electrical contact and the second electrical contact are arranged on the first major surface, wherein the first electrical contact comprises a first conductive region providing an extended contact area, wherein the second electrical contact comprises a second conductive region providing an extended contact area, and wherein the first conductive region is in mechanical and electrical contact with the first axial electrode section, and wherein the second conductive region is in mechanical and electrical contact with the second axial electrode section.

8. Sleeve according to claim 6 , wherein the sleeve body comprises a third axial electrode section, which is coaxially aligned with the first axial electrode section and the second axial electrode section, and which is electrically conductive or semiconductive, wherein the first axial electrode section and the third axial electrode section are separated by a second axial separation section which is electrically non-conductive.

9. Sleeve according to claim 8 , wherein the circuit board is operable to provide an electrical contact between the second axial electrode section and the third axial electrode section.

10. Sleeve according to claim 2 , wherein a first portion of the jacket is arranged on a radially outer surface of the circuit board, and wherein a second portion of the jacket is arranged on a radially outer surface of the sleeve body.

11. Sleeve according to claim 1 , wherein the spacer layer is comprised in the sleeve.

12. Sleeve according to claim 1 , wherein the spacer layer is comprised in the power cable, and wherein the spacer layer comprises at least a portion of an insulator layer of the power cable, the insulator layer being arranged concentrically around the inner conductor of the power cable.

13. Method of providing an expandable sleeve according to claim 2 , comprising, in this sequence, the steps of:
a) providing an expandable sleeve for a high- or medium-voltage power cable, wherein the sleeve comprises a tubular sleeve body having a first axial electrode section, which section is electrically conductive or semiconductive, wherein the sleeve is radially expandable and arrangeable radially outward of an inner conductor of the cable when expanded, such that the first axial electrode section is radially separated from the inner conductor by at least an electrically insulating spacer layer;
providing an electrically non-conductive jacket; and
providing a circuit board comprising opposed first and second major surfaces and a first electrical contact, arranged on the first major surface;
b) arranging at least a part of the circuit board radially outward of the sleeve body such that the first electrical contact is electrically connected with the first axial electrode section;
c) arranging at least a part of the jacket radially outward of the circuit board and radially outward of the sleeve body.

14. High- or medium-voltage current-carrying device for a power network, comprising an inner conductor for carrying the current, further comprising a sleeve according to claim 1 , the sleeve being arranged radially outward of the inner conductor, such that the first axial electrode section is radially separated from the inner conductor by at least an electrically insulating spacer layer.

15. Electrical power distribution network, comprising a high- or medium-voltage current-carrying device for a power network according to claim 14 .

16. A sleeve for a high- or medium-voltage power cable, the cable comprising an inner conductor defining axial and radial directions,
wherein the sleeve comprises
a tubular sleeve body having a first axial electrode section, which section is electrically conductive or semiconductive,

wherein the sleeve is radially shrinkable into a position radially outward of the inner conductor when shrunk, such that the first axial electrode section is radially separated from the inner conductor by at least an electrically insulating spacer layer,
and the sleeve further comprises a circuit board, at least partially arranged radially outward of the sleeve body, comprising a first electrical contact which is electrically connected with the first axial electrode section.

17. The sleeve according to claim 16 , further comprising an electrically non-conductive jacket, at least partially arranged radially outward of the sleeve body, and at least partially arranged radially outward of the circuit board.

18. The sleeve according to claim 16 , wherein the circuit board comprises a first major surface and a second major surface, and wherein the first electrical contact is arranged on the first major surface and comprises a conductive region, arranged on the first major surface, wherein the conductive region provides an extended contact area and is in mechanical and electrical contact with the first axial electrode section.

19. The sleeve according to claim 17 , wherein the sleeve body comprises a second axial electrode section, which is coaxially aligned with the first axial electrode section, and which is electrically conductive or semiconductive, wherein the first axial electrode sect

Assignees

• 3M Innovative Properties Co

Inventors

• Gravermann Mark
• Lohmeier Gerhard
• Stalder Michael
• Busemann Friedrich
• Weichold Jens
• Schubert Bernd

Classifications

• H01R9/0515

  Connection to a rigid planar substrate, e.g. printed circuit board · CPC title

• H05K3/30

  Assembling printed circuits with electric components, e.g. with resistors · CPC title

• H01B7/0216

  Two layers · CPC title

• H02G15/18

  protected by sleeves, e.g. for communication cable (two-part covers H02G15/10 {; preforms having internal stresses B29C61/00}) · CPC title

• G01R15/16

  using capacitive devices · CPC title