Arrangement for contacting a screen of an electrical high voltage cable

• US 9,525,240 B2
• Filed: 11/18/2014
• Issued: 12/20/2016
• Est. Priority Date: 11/19/2013
• Status: Expired due to Fees

• Current Assignee: Nexans Incorporated (Nokia Corporation)
• Original Assignee: Nexans Incorporated (Nokia Corporation)
• Inventors: Aue, Volker
• Primary Examiner(s): TA, THO DAC
• Application Number:
  US14/546,104
• Publication Number:
  US 20150140864A1
• Time in Patent Office: 763 Days
• Field of Search: 439/607.41, 439/607.44, 439/584
• US Class Current: 1/1
• CPC Class Codes: H01R 13/59 Threaded ferrule or bolt operating in a direction parallel to the cable or wire
• CPC Class Codes: H01R 13/648 Protective earth or shield arrangements on coupling devices , e.g. anti-static shielding coaxially arranged shields H01R24/38
• CPC Class Codes: H01R 13/65914 Connection of shield to additional grounding conductors
• CPC Class Codes: H01R 4/646 for cables or flexible cylindrical bodies
• CPC Class Codes: H01R 9/0524 Connection to outer conductor by action of a clamping member, e.g. screw fastening means H01R9/0515 takes precedence
• CPC Class Codes: H02G 3/0666 with means clamping the armour of the conductor H02G3/0675, H02G3/0683 take precedence

Abstract

An arrangement for contacting an electrical screen includes an armature that has at least two ring shaped contact elements, a first contact element, and a second contact element which, in the assembly position, are connected to each other by a screw connection. The first contact element has a conical outer surface which widens toward the end of the high voltage cable and surrounds the cable strand of the high voltage cable. The second contact element is attached to parts of the screw connection and has a conical inner surface which also widens toward the end of the high voltage cable and which extends in the assembly position parallel to the outer surface of the first contact element.

Claims

1. Arrangement for contacting an aluminum containing electrical screen, said screen circumferentially surrounding a cable strand over the entire length of a high voltage cable,

said arrangement comprising:

a metal fitting, configured such that said screen of said high voltage cable can be clamped over one end of the high voltage cable between portions of said fitting made of metal, wherein;

the fitting has at least two ring shaped contact elements, a first contact element and a second contact element which are connected to each other in an assembly position through screw connections,

that the first contact element has a conical outer surface which widens conically toward an end of the high voltage cable and surrounds the cable strand of the high voltage cable,

that the second contact element is mounted on parts of said screw connections and has an inner surface which also widens conically toward said end of the high voltage cable which extends, in the mounted position, parallel to the outer surface of the first contact element,

that at least a part of the screen, the end portions of which are widened conically is clamped in the mounted position between the conical surfaces of the two contact elements which extend parallel to each other, and

that at least the conical inner surface of the second contact element has structures for increasing its roughness.

2. Arrangement according to claim 1, wherein said arrangement is configured to work in conjunction with said screen when said screen is composed of two layers, an outer layer and an inner layer, of electrically conductive material which are arranged one above the other.

3. Arrangement according to claim 2, wherein the outer layer of the screen is composed of an aluminum band which surrounds said cable strand of said high voltage cable as a circumferentially closed tube and which is severed by axially extending cuts so as to form strips at the end of the high voltage cable.

4. Arrangement according to claim 2, wherein the inner layer of the screen has wires which are roped around said cable strand of said high voltage cable.

5. Arrangement according to claim 1, wherein

a third contact element is connected through a screw connection to the first contact element which has a conical outer surface which extends in the assembled position parallel to the conical inner surface of the second contact element and has a conical inner surface which in the mounted position extends parallel to the conical outer surface of the first contact element, and

in the mounted position, the wires of the inner layer of the screen are clamped between the conical outer surface of the first contact element and the conical inner surface of the third contact element, while an aluminum band is clamped between the conical outer surface of the third contact element and the conical inner surface of the second contact element.

6. Arrangement according to claim 1, wherein the conical inner surfaces and conical outer surfaces of the first contact element and second contact element have structures for increasing their roughness.