High voltage shielded cable splice

• US 4,025,717 A
• Filed: 05/07/1975
• Issued: 05/24/1977
• Est. Priority Date: 05/07/1975
• Status: Expired due to Term

• Current Assignee: William F. Whittingham
• Original Assignee: William F. Whittingham
• Inventors: Whittingham, William F.
• Primary Examiner(s): Askin, Laramie E.
• Application Number:
  US05/575,221
• Time in Patent Office: 748 Days
• Field of Search: 174/88 R, 174/88 C, 174/91, 174/93, 174/84 R, 174/76, 174/77 R, 174/21 R, 174/21 C, 174/22 R, 174/22 C, 156/49, 156/48, 29/628
• US Class Current: 174/88.00C
• CPC Class Codes: H02G 15/003 Filling materials, e.g. solid or fluid insulation
• CPC Class Codes: H02G 15/10 protected by boxes, e.g. by distribution, connection or junction boxes
• CPC Class Codes: H02G 15/18 protected by sleeves, e.g. for communication cable two-part covers H02G15/10 ; preforms having internal stresses B29C61/00

Abstract

A splice for a shielded high voltage cable wherein a section of electrical shielding sleeve of the original cable is replaced by an open-mesh sleeve, and the latter is concentrically supported on the connector sleeve by a polyurethane helix. A polyvinyl chloride or other plastic jacket is taped to the cable at its opposite ends, and is filled in with mixed polyurethane plastic material, an epoxy, or the like, which invades the entire interior of the splice, inside the jacket, and inside the open-mesh replacement shielding sleeve as well. The unshielded case is the same, but with the shield and shield replacement step omitted.

Claims

1. A splice of the proximate end portions of two shielded high voltage cables each having a conductor, primary insulation in a layer around said conductor, an electrically conductive shield in the form of a sleeve around said primary insulation, and an outer cable jacket around said shield, the primary insulation on each of said conductors and said shield being stripped back to expose an end portion of the conductor, and the outer cable jacket being stripped back far enough to expose an end portion of the shield, comprising:

an electrically conductive cable connector sleeve connecting the exposed end portions of the conductors;

an electrically conductive open-mesh shielding splice sleeve around said conductors, said splice sleeve being electrically bonded at opposite ends to the exposed end portions of said shields of said cables;

an insulation spacer comprising a flexible helix mounted on said connector sleeve, said spacer having an exterior cylindric surface concentric with said conductors and supporting said splice sleeve in a position concentric with said conductors;

a tubular splice jacket surrounding said cable jackets, with its opposite ends joined thereto on opposite sides of said splice, said tubular splice jacket being annularly spaced from said cable jackets between its ends; and

a body of electrically insulating filler material, of high dielectric strength and high electrical resistance solidly filling the otherwise open space inside said tubular splice jacket, and continuing through the open-mesh splice sleeve to fill all interior open space therewithin.

2. The splice of claim 1, wherein said helix is composed of polyurethane.

3. A splice of the proximate end portions of two shielded high voltage cables each having a conductor, primary insulation in a layer around said conductor, an electrically conductive shield in the form of a sleeve around said primary insulation, and an outer cable jacket around said shield, the primary insulation on each of said conductors and said shield being stripped back to expose an end portion of the conductor, and the outer cable jacket being stripped back far enough to expose an end portion of the shield, comprising:

an electrically conductive cable connector sleeve connecting the exposed end portions of the conductors;

an electrically conductive open-mesh shielding splice sleeve around said conductors, said splice sleeve being electrically bonded at opposite ends to the exposed end portions of said shields of said cables, and said open-mesh splice sleeve being longitudinally split, and being bonded to the inside of a semi-flexible tube of plastic material, said tube being longitudinally split in coincidence with the split in said splice sleeve, and said tube being apertured to give access of a filler material to the exterior of the splice sleeve;

a tubular splice jacket surrounding said cable jackets, with its opposite ends joined thereto on opposite sides of said splice, said tubular splice jacket being annularly spaced from said cable jackets between its ends; and

a body of electrically insulating filler material, of high dielectric strength and high electrical resistance solidly filling the otherwise open space inside said tubular splice jacket, and continuing through the open-mesh splice sleeve to fill all interior open space therewithin.