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1. 发明专利

JP2001177973A TAPE-WINDING CONNECTION STRUCTURE FOR CV CABLE 失效
公开(公告)号：JP2001177973A
公开(公告)日：2001-06-29
申请号：JP35953899
申请日：1999-12-17
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： NAKADE MASAHIKO , MATSUI TOSHIYA , OKUYAMA TAKESHI , KATAGAI TERUSHI
IPC分类号： H02G1/14 , H02G15/08
摘要： PROBLEM TO BE SOLVED: To provide a tape-winding connection structure for a CV cable, which is prolonged in service life. SOLUTION: In a tape-winding connection structure for a CV cable, where the fellow ends of CV cables 1a and 1b being peeled off in stages, exposed cable conductors 2a and 2b are butted against each other, and a semiconductive tape 5 is wound on the butting section between the cable conductors 2a and 2b, and a metal layer 11 to cover the exposed cables 2a and 2b is provided inside the semiconductive tape 5.

2. 发明专利

JPH04264273A METHOD FOR DIAGNOSING DETERIORATION OF POWER CABLE 失效
公开(公告)号：JPH04264273A
公开(公告)日：1992-09-21
申请号：JP4547391
申请日：1991-02-19
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： KATSUTA GINZO , TOTANI ATSUSHI , KATAGAI TERUSHI , KONNO MASARU
IPC分类号： G01R31/02 , G01R31/12
摘要： PURPOSE:To securely detect deterioration in insulation of a power cable insulated by polyethylene or crosslinked polyethylene by applying dc voltage, heating the cable after it is grounded and measuring thermally stimulated current. CONSTITUTION:After dc voltage Vb is applied to a cable at normal temperature for 10 minutes, it is temporarily grounded, and then the cable is heated from the normal temperature to 90 deg.C while voltage Vc which is relatively smaller than the voltage Vb and has the same polarity is applied to measure thermally stimulated current(TSC) flowing from the cable. The voltage Vb covers three types for example of 60, 120 and 180KV, while the voltage Vc is assumed to be 5.8KV. There is correlation between generation density of bow tie tree(BTT) and a TSC peak value. That is by sensing an increase in spatial charge storage caused by the bow tight lea or the like generated by deterioration, deterioration in insulation can be determined.

3. 发明专利

JPH0298014A DIRECT CURRENT CABLE 失效
公开(公告)号：JPH0298014A
公开(公告)日：1990-04-10
申请号：JP8479488
申请日：1988-04-05
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： OGAWA KATSUNORI , SUZUKI TAKEYA , KATAGAI TERUSHI , KANEOKA MAMORU , SEKII YASUO , IKEDA TADAYOSHI
IPC分类号： H01B9/00
摘要： PURPOSE:To make the distribution of a volume resistivity uniform and reduce the accumulation of space charge so as to improve the insulation capability by manufacturing an insulating material adding an antioxidant to non-bridge formation high pressure method low density polyethylene. CONSTITUTION:0.025 to 0.25 weight part of 4,4'-thio-bis (6-butyl-ortho-cresol,-2,2- thio[diethyl-bis-3-(3,5-di-t-butyl-4-hydroxy phenol) Propionate], etc., are added to 100 weight part of high pressure method low density polyethylene (non-bridge formation) as an antioxidant. As insulating material with said composition is uniform in its distribution of the volume resistivity, also has a small charge accumulation amount, the drops of its breakdown voltage and the breakdown voltage at the time if the polarity reverse are eliminated, thus the stability on the direct current insulation can be improved, when it is used for the insulating material of a direct current cable. According to this, the thickness of the insulating material can be reduced thus the weight and the size of the cable can be reduced.

4. 发明专利

JP2002005986A INSULATION DETERIORATION DIAGNOSIS METHOD 失效
公开(公告)号：JP2002005986A
公开(公告)日：2002-01-09
申请号：JP2000188832
申请日：2000-06-23
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： NAKADE MASAHIKO , INOUE DAISUKE , ENDO TAKESHI , MURATA YOSHINAO , KATAGAI TERUSHI
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To provide an insulation deterioration diagnosis method not affected by influence of a harmonic constituent included in a power source. SOLUTION: A Schering bridge circuit D is constructed by connecting a first circuit A, in which a test capacitor 1 constructed of an insulating body for a CV cable is connected to a variable resistor 2 in series through a conjunctive point a, and a second circuit B, in which a variable capacitor 4 and a parallel connection circuit C for a fixed resistor 5 are connected to a standard capacitor 3 in series through a conjunctive point b, to each other in parallel, and to the conjunctive points a, b, an outputting insulated transformer 6, a detector 7, and an imbalance constituent analyzing device 8 are connected in this order. In this structure, an alternating voltage is impressed to the Schering circuit D by means of a high voltage generating device 10, a potential difference between the conjunctive points a, b is minimized by regulating the variable resistor 2 and the variable capacitor 4, and then, deterioration of insulation is diagnosed by setting the variable capacitor 4 to zero.

5. 发明专利

JP2000338097A LIFE ESTIMATION METHOD FOR CABLE CONNECTION PART 失效
公开(公告)号：JP2000338097A
公开(公告)日：2000-12-08
申请号：JP14929699
申请日：1999-05-28
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： NAKADE MASAHIKO , OKUYAMA TAKESHI , SATO HIDEO , KATAGAI TERUSHI
IPC分类号： G01M99/00 , G01N27/26 , G01N33/00 , G01M19/00
摘要： PROBLEM TO BE SOLVED: To estimate the life of a cable connection part by calculating the time required until an insulating tape alone reaches a level of an oxygen consumption amt. required until the life of the tape is exhausted. SOLUTION: Oxygen in air supplied in a cable connection part 11 from the gaps between the twist wires of a conductor 5 is dissolved in a semiconductor shield layer 6, an insulator 7, a semiconductive tape 9 and an insulating reinforcing layer 10 to diffuse. At first, the change with the elapse of time of the oxygen consumption amt. of an insulating tape is calculated. Since the insulating tape is stretched in predetermined magnification and wound in the connection part, a jig is used in order to simulate this state to stretch the tape with a thickness of 0.5 mm by predetermined magnification, and the stretched tape is put in a transparent container to be held in two thermostatic tanks set to 160 and 180 deg.C. Next, the concn. of oxygen is measured at every predetermined time while the state of the tape in the transparent container is observed and, after a certain time is elapsed, the oxygen consumption amt. per a unit vol. of the tape is calculated by formula (initial oxygen concn. in container-oxygen concn. after elapse of time)×container inner vol÷vol. of insulating tape.

6. 发明专利

JPH0221510A DIRECT CURRENT CABLE 失效
公开(公告)号：JPH0221510A
公开(公告)日：1990-01-24
申请号：JP17202088
申请日：1988-07-08
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： OGAWA KATSUNORI , SUZUKI TAKEYA , KATAGAI TERUSHI , SEKII YASUO , KANEOKA MAMORU
IPC分类号： H01B9/00
摘要： PURPOSE:To make it possible to reduce the space electric charge accumulation and to obtain a DC cable of an excellent insulation property by adding an oxidization preventive agent to a low pressure method high density polyethylene to form an insulator. CONSTITUTION:In a DC cable made by forming an insulator of a polymer at the outer periphery of a core wire conductor, an insulator is formed by adding an oxidization preventive agent to a low pressure method high density polyethylene. That is, in the insulating layer in the DC cable, an insulator is formed by adding a hindered or a semihidered phenol type oxidization preventive agent to polyethylene or a bridging polyethylene. Consequently, a space electric charge accumulation is reduced, and the insulation property can be improved.

7. 发明专利

JPH01258312A DC CABLE 失效
公开(公告)号：JPH01258312A
公开(公告)日：1989-10-16
申请号：JP8479388
申请日：1988-04-05
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： OGAWA KATSUNORI , SUZUKI TAKEYA , KATAGAI TERUSHI , SHIRAI HISAYA , KANEOKA MAMORU
IPC分类号： H01B9/00
摘要： PURPOSE:To reduce space charge accumulation and to improve insulation performance by adding hindered or semihindered phenol type anti-oxidant to a polyethylene or bridge polyethylene for forming an insulating material. CONSTITUTION:A hindered or semihindered phenol type anti-oxidant is added to polyethylene or bridge polyethylene for forming an insulating material. The amount of the anti-oxidant to be used, in case of 4,4'-thio or the like, shall be from 0.025 to 0.25wt.% to 100wt.% of low concentration polyethylene.

8. 发明专利

JPS63268413A CROSSLINKING OF CROSSLINKED POLYETHYLENE CABLE CONNECTION PART 失效
公开(公告)号：JPS63268413A
公开(公告)日：1988-11-07
申请号：JP10083787
申请日：1987-04-23
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： KARASAKI TAKASHI , KATAGAI TERUSHI , YAMAGUCHI MASAYUKI
IPC分类号： H02G1/14
摘要： PURPOSE:To volatilize, absorb and remove crosslinked and decomposed residue in an insulator by providing a crosslinking and decomposing residue volatilizing layer and a crosslinking and decomposing residue absorbing layer in a connector retaining layer. CONSTITUTION:A connector insulator 4 is provided on a cable conductor 1, and an external semiconductive layer 5, a crosslinking and decomposing residue volatilizing layer 6 and a crosslinking and decomposing residue absorbing layer 7 are provided thereon. When the temperature of a metal mold 9 is raised at the cable connection part to crosslink the insulator 4 with crosslinking agent, the crosslinking and decomposing residue generated by the crosslinking is efficiently volatilized in the layer 6, and the gas is absorbed to the layer 7. Accordingly, it is not retained in the insulator 4. Thus, the maximum value of the residue in the insulator 4 can be reduced to approx. 80wt.% of the residue predicted from the amount of mixing the crosslinking agent.

9. 发明专利

JPS63268410A EXTRUDER FOR EXTRUSION MOLDED JOINT 失效
公开(公告)号：JPS63268410A
公开(公告)日：1988-11-07
申请号：JP10083487
申请日：1987-04-23
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： KARASAKI TAKASHI , YAMAGUCHI MASAYUKI , TANNO SHIRO , ISONO MAKOTO , KATAGAI TERUSHI , SATO HIDEO
IPC分类号： H02G1/14
摘要： PURPOSE:To improve operability in a cavity by rotating an extruder to set a crosshead in an arbitrary height from a floor face. CONSTITUTION:An extruder 3 is rotated downward with respect to a joint near a floor face, and a crosshead 9 is matched to the molding resin inlet 10a of an extrusion metal mold 2a. The inlet 10a is connected by a resin transport tube 12a with heating means to the crosshead 9. The mold 2a and the extruder 3 are preheated, resin is supplied from a resin supply hopper 6 and extrusion molded. In case of a CV cable disposed at an upper stage, the extruder 3 is rotated upward, the crosshead 9 is matched to a molding resin inlet 10b of an extrusion metal mold 2b for an upper stage joint, a resin transport tube 12b with heating means is connected thereto to extrude the resin. Further, in case of a CV cable of intermediate stage, the extruder 3 is rotated at 90 deg. to be disposed in parallel with an extrusion metal mold 2c, and connected with a resin transport tube 12c with heating means. Thus, the extruder is disposed in a narrow road to obtain preferable operability.

10. 发明专利

JP2002135962A TAPED CABLE SPLICE AND ITS OVERLOADED USE 失效
公开(公告)号：JP2002135962A
公开(公告)日：2002-05-10
申请号：JP2000333549
申请日：2000-10-27
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： NAKADE MASAHIKO , MATSUI TOSHIYA , KATAGAI TERUSHI , KATO KOICHI , FUJIYOSHI YASUO
IPC分类号： H02G1/14 , H02G15/113
摘要： PROBLEM TO BE SOLVED: To provide a splice which can stand overloaded use when the load is heavy on a CV cable line. SOLUTION: Cable conductors 3, 3 projecting from the ends of CV cables 2, 2 are inserted into a sleeve 4 through its both ends and jointed. The joint is, then, wrapped with a self-welding insulation tape 6 and covered with a metal case 11 that has heat-radiating fins 12 on its outer surface.

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