An electrical insulated threaded connection includes a conductive box with a plurality of internal threads, a conductive pin with a plurality of external threads, and a double-threaded electrical insulator sleeve disposed between the conductive pin and box. The double-threaded electrical insulator sleeve comprises a plurality of external threads that mate with the plurality of internal threads of the conductive box and a plurality of internal threads that mate with the plurality of external threads of the conductive pin. In certain embodiments, the double-threaded electrical insulator sleeve fills a full volume between the plurality of internal threads of the conductive box and the plurality of external threads of the conductive pin, and there are no voids or pockets between any of the mating threads.

A cable assembly includes an elongate conductor surrounded by an outer insulator and an outer ferrule surrounding a portion of the conductor. An outer surface of the outer ferrule is deformed to produce an indentation having an indentation surface that is angled relative to the outer surface. The indentation forms a barb that at least partially penetrates the outer insulator. A method of manufacturing the cable assembly and a tool for forming the outer ferrule is also presented and described.

A cable assembly includes an elongate conductor surrounded by an outer insulator and an outer ferrule surrounding a portion of the conductor. An outer surface of the outer ferrule is deformed to produce an indentation having an indentation surface that is angled relative to the outer surface. The indentation forms a barb that at least partially penetrates the outer insulator. A method of manufacturing the cable assembly and a tool for forming the outer ferrule is also presented and described.

A surge arrester (100) and a method for manufacturing the surge arrester (100), the surge arrester (100) comprises a preassembled active part (110) extending in a longitudinal direction (Y), and a separately produced flexible housing (120) defining a bore (121) in the longitudinal direction (Y) and having an opening at an end surface (126) of the flexible housing (120), the flexible housing (120) is arranged surrounding the active part (110) via the bore (121) and in contact with the active part (110), the contact causes a deformation of the flexible housing (120) in a circumferential direction (C), and the deformation generates a pressure applied on the active part (110) along a radial direction (R).

A surge arrester (100) and a method for manufacturing the surge arrester (100), the surge arrester (100) comprises a preassembled active part (110) extending in a longitudinal direction (Y), and a separately produced flexible housing (120) defining a bore (121) in the longitudinal direction (Y) and having an opening at an end surface (126) of the flexible housing (120), the flexible housing (120) is arranged surrounding the active part (110) via the bore (121) and in contact with the active part (110), the contact causes a deformation of the flexible housing (120) in a circumferential direction (C), and the deformation generates a pressure applied on the active part (110) along a radial direction (R).

A dielectric cover for a first type of insulator, supporting a conductor in an electrical distribution system, has a first height for covering high voltage portions of the first type of insulator. Thus, wildlife is protected from electrocution. In the event a second type of insulator is used, such as a K-Line type insulator having a relatively large top metal, an inexpensive dielectric shell is fitted over top of the cover to extend the dielectric height by at least one inch to fully laterally cover the top metal of the of the K-Line type insulator. Thus, different covers are not needed for covering both types of insulators, since only the shell is added for covering the second type of insulator. The shell may be provided in different sizes to accommodate different lengths of the top metal. Retaining pins are used to secure the cover over the insulator and conductor.

A dielectric cover for a first type of insulator, supporting a conductor in an electrical distribution system, has a first height for covering high voltage portions of the first type of insulator. Thus, wildlife is protected from electrocution. In the event a second type of insulator is used, such as a K-Line type insulator having a relatively large top metal, an inexpensive dielectric shell is fitted over top of the cover to extend the dielectric height by at least one inch to fully laterally cover the top metal of the of the K-Line type insulator. Thus, different covers are not needed for covering both types of insulators, since only the shell is added for covering the second type of insulator. The shell may be provided in different sizes to accommodate different lengths of the top metal. Retaining pins are used to secure the cover over the insulator and conductor.

An electrical insulated threaded connection includes a conductive box with a plurality of internal threads, a conductive pin with a plurality of external threads, and a double-threaded electrical insulator sleeve disposed between the conductive pin and box. The double-threaded electrical insulator sleeve comprises a plurality of external threads that mate with the plurality of internal threads of the conductive box and a plurality of internal threads that mate with the plurality of external threads of the conductive pin. In certain embodiments, the double-threaded electrical insulator sleeve fills a full volume between the plurality of internal threads of the conductive box and the plurality of external threads of the conductive pin, and there are no voids or pockets between any of the mating threads.

Provided in the present disclosure is a lightning induction-type solid-phase arc-extinguishing lightning protector. The lightning protector primarily including a lightning protector housing, an arc-extinguishing rotating disk, a conductive metal plate, an arc-striking rod, a fastening rod, an inductive coil, an arc-extinguishing cylinder, and a counter arm. The arc-extinguishing rotating disk is mounted within the lightning protector housing, and a planar torsion spring is provided at a center of the arc-extinguishing rotating disk for driving the arc-extinguishing rotating disk to rotate; the conductive metal plate is mounted at an upper portion of the arc-extinguishing rotating disk; several arc-extinguishing air-jet members are provided around a circumferential direction of the arc-extinguishing rotating disk, each of the arc-extinguishing air-jet members is provided with a trigger electrode and a recess on one side thereof, and the trigger electrode has one end connected to one of triggering ends of the arc-extinguishing air-jet member by means of a wire, and the other end extending beyond an edge of the arc-extinguishing rotating disk; the other triggering end of the arc-extinguishing air-jet member is connected to a metallic conductive strip by means of a wire. The present disclosure has the advantages of simple structure, reasonable design, improved arc-extinguishing performance, and stable operation, and convenience in replacement of the arc-extinguishing air-jet members.

Provided in the present disclosure is a lightning induction-type solid-phase arc-extinguishing lightning protector. The lightning protector primarily including a lightning protector housing, an arc-extinguishing rotating disk, a conductive metal plate, an arc-striking rod, a fastening rod, an inductive coil, an arc-extinguishing cylinder, and a counter arm. The arc-extinguishing rotating disk is mounted within the lightning protector housing, and a planar torsion spring is provided at a center of the arc-extinguishing rotating disk for driving the arc-extinguishing rotating disk to rotate; the conductive metal plate is mounted at an upper portion of the arc-extinguishing rotating disk; several arc-extinguishing air-jet members are provided around a circumferential direction of the arc-extinguishing rotating disk, each of the arc-extinguishing air-jet members is provided with a trigger electrode and a recess on one side thereof, and the trigger electrode has one end connected to one of triggering ends of the arc-extinguishing air-jet member by means of a wire, and the other end extending beyond an edge of the arc-extinguishing rotating disk; the other triggering end of the arc-extinguishing air-jet member is connected to a metallic conductive strip by means of a wire. The present disclosure has the advantages of simple structure, reasonable design, improved arc-extinguishing performance, and stable operation, and convenience in replacement of the arc-extinguishing air-jet members.