Patent EA-003435-B1 (EA)
Title: Creeping discharge lightning arrestor
Inventor: MOROOKA YASUNARI
IPC: H01T4/08
Filed: 2000-05-23
Abstract: 1. A creeping discharge lightning arrestor used in an overhead power line formed of an insulated wire and partially of an exposed portion, the overhead power line comprises an insulator having an earth portion, said creeping discharge lightning arrestor comprising a body including an insulated wire with a conductor and insulating sheath portion for sheathing the conductor to provide an adequate electrical insulation of a power cable, wherein the insulated wire is folded into two, and one of its ends is exposed, said exposed portion of the arrestor body is electrically connected to one of an earth portion of an insulator and the exposed portion of the overhead power line, the other end of the arrestor body is arranged at the other end of an earth portion of an insulator and exposed portion of the overhead power line. 2. A creeping discharge lightning arrestor used in an overhead power line formed of an exposed wire and provided with an insulator having an earthed end, said creeping discharge lightning arrestor comprising a body including an insulated wire with a conductor and insulating sheath portion for sheathing the conductor to provide an adequate electrical insulation of a power cable line, wherein the insulated wire is folded into two, and one of its ends is exposed, said exposed portion of the arrestor body is electrically connected to one of earth portion of an insulator and the exposed portion of the overhead power line, the other end of the protection device body is arranged at the other end of an earth portion of an insulator and exposed portion of the overhead power line. 3. A creeping discharge lightning arrestor comprising an insulating tube, a discharge electrode provided on both sides of the insulating tube the one end or both ends of which are opened, respectively, wherein one of said discharge electrode is connected to an overhead power line, and another one of said discharge electrode is connected to an earth portion of an insulator. 4. A creeping discharge lightning arrestor as defined in claim 1 or 2, which further includes an insulation tube the one end or both ends of which are opened, said insulation tube covering the outside of said creeping discharge lightning arrestor, wherein one end of said lightning arrestor is connected to said overhead power line, and another end of said lightning protection device is connected to said earth portion of said insulator. 5. A creeping discharge lightning arrestor as defined in claim 1 or 2, which further includes: an insulation tube the one end or both ends of which are opened, said insulation tube sandwiched by said insulated wire of said creeping discharge lightning arrestor on the inside of said insulated wire of said creeping discharge lightning arrestor; and an electrode to be connected to said aerial wire, said electrode inserted into one open end of said insulation tube located on the side of said insulation sheath of said lightning arrestor, wherein one end of said lightning protection device is connected to said overhead power line, and another end of said lightning arrestor is connected to said earth portion of said insulator. 6. A creeping discharge lightning arrestor comprising an electrode arranged to said overhead power line and connected to it, a back electrode connected via the earthed electrode to said portion of said insulator arranged to said overhead power line, an insulating tube covering the back electrode for insulation, the electrode arranged to said overhead power line is inserted into said insulating tube enabling to put a discharge portion inside the insulating tube, and the back electrode is arranged in an insulation layer of the insulating tube along a continuos discharge portion enabling to provide a required discharge characteristics without dielectric breakdown between the electrode arranged to said overhead power line and the back electrode.