WO2006129897A1 - Procede de serrage d'un conducteur aerien de type a interstice - Google Patents

Procede de serrage d'un conducteur aerien de type a interstice Download PDF

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Publication number
WO2006129897A1
WO2006129897A1 PCT/KR2005/001887 KR2005001887W WO2006129897A1 WO 2006129897 A1 WO2006129897 A1 WO 2006129897A1 KR 2005001887 W KR2005001887 W KR 2005001887W WO 2006129897 A1 WO2006129897 A1 WO 2006129897A1
Authority
WO
WIPO (PCT)
Prior art keywords
gap
conductor unit
filler
conductor
aluminum
Prior art date
Application number
PCT/KR2005/001887
Other languages
English (en)
Inventor
Sung-Yul Park
Sung-Uk Kim
Jae-Young Choi
Sung-Ik Shim
Original Assignee
Ls Cable Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ls Cable Ltd. filed Critical Ls Cable Ltd.
Priority to US10/555,597 priority Critical patent/US20070209227A1/en
Publication of WO2006129897A1 publication Critical patent/WO2006129897A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • H01B5/10—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material
    • H01B5/101—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing

Definitions

  • the present invention relates to a clamping method of a gap-type overhead conductor, and more particularly to a clamping method of a gap-type overhead conductor, which filling a filler into a gap between a conductor unit and a reinforced steel at a clamping end.
  • an overhead cable such as an overhead power cable, an overhead earth wire and an OPGW (Optical Ground Wire) is installed by means of electric poles or power-transmission towers, and its temperature is changed due to current flowing through its wire and external environments such as atmospheric temperature, wind and solar light.
  • OPGW Optical Ground Wire
  • Such temperature change causes contraction and expansion of the cable, which results in a change of a sag of the overhead cable.
  • the sag of the overhead cable is considered in controlling a tension between power-transmission towers and determining an electric spacing distance from the ground. That is to say, a maximum allowable current of the overhead cable is limited by the sag of cable.
  • LTACSR Loose-Type Aluminum Cable Steel Reinforced
  • GTACSR Gap-Type Aluminum Cable Steel Reinforced
  • the loose-type ACSR is configured to share a tension to a reinforced steel by making a common ACSR and then mechanically forming a gap between the reinforced steel and an aluminum stranded wire during installation.
  • a gap-type ASCR 1 is configured such that a gap G is formed between a reinforced steel 3 and an aluminum conductor unit 5 during a cable manufacturing process, and the conductor unit 5 surrounding the reinforced steel 3 is composed of a first conductor 4 and a second conductor 6.
  • a clamping method of such a gap-type overhead cable is identical to an attachment method of a general transmission cable. That is to say, in order to clamp a conventional gap-type transmission cable, as shown in FIG. 2, a gap-type overhead transmission cable 1 in which gaps G are constantly formed between a reinforced steel 3 having a steel cable and a conductor unit composed of first and second conductors 4 and 6 made of aluminum with a stranded wire shape is prepared at regular intervals.
  • a steel clamp (not shown) is mounted to compress the reinforced steel 3, and then a constant pressure is applied to compress an aluminum sleeve 7 for the purpose of clamping.
  • a compression force is not sufficiently applied to the aluminum conductor unit 5 and the reinforced steel 3 due to the gap existing in the gap-type overhead cable, thereby deteriorating the clamping force.
  • the aluminum conductor unit 5 is excessively bent as much at the end point of the compression portion.
  • the present invention is designed in consideration of the above problems, and therefore it is an object of the invention to provide a clamping method of a gap-type overhead conductor, which may prevent a fracture of the end point of a compression portion when the gap-type overhead cable is compressed using an aluminum sleeve by means of filling the gap.
  • the present invention provides a clamping method for a gap-type overhead cable, in which at least one layer of aluminum strand is stranded around a reinforced steel to form a conductor unit, using a steel clamp and a sleeve, the method including (a) mounting and compressing the steel clamp to the reinforced steel; (b) dismantling the conductor unit by a predetermined length and filling a gap formed between the reinforced steel and the conductor unit with a filler made of metal material; and (c) restoring the dismantled conductor unit into its original state and then mounting and compressing the aluminum sleeve to the conductor unit.
  • the filler is selected from the group consisting of an aluminum tape, an aluminum plate and an aluminum strand.
  • the filler is filled as much as a length longer than a final compression portion.
  • a filler layer formed by the filler preferably has a thickness of 0.1 to 0.6 mm.
  • the dismantlement length of the conductor unit preferably ranges from 30 cm to 2 m.
  • FIG. 1 is a sectional view showing a conventional gap-type overhead cable
  • FIGs. 2 to 4 are sectional views illustrating a clamping process of a conventional gap-type overhead cable, in which FIG. 2 is a sectional view before a bracket compression process, FIG. 3 is a sectional view after the bracket compression process, and FIG. 4 is a sectional view during a tension test;
  • FIG. 5 is a sectional view illustrating a clamping process of a gap-type overhead cable according to a preferred embodiment of the present invention, before a bracket compression process;
  • FIG. 6 is a sectional view showing that a filler is filled before the bracket of FIG. 5 is compressed;
  • FIG. 7 is a sectional view showing the state after the bracket of FIG. 6 is compressed.
  • FIG. 8 is a sectional view showing that a tension test is conducted for the bracket of
  • FIG. 7. Best Mode for Carrying Out the Invention
  • FIGs. 5 to 8 are schematic sectional views illustrating a clamping method of a gap- type overhead conductor according to a preferred embodiment of the present invention.
  • the clamping method of a gap-type overhead conductor is implemented in a way of filling a filler 15 (see FIG. 6) into a gap G of a predetermined length from the end point of a final compression portion, as defined in the conventional clamping method, so as to prevent a fracture at the end point of the final compression portion of an aluminum sleeve 16, as described below.
  • the gap-type overhead conductor in which at least one layer of aluminum strand is stranded around a reinforced steel to form a conductor unit 13 is prepared, and then a steel clamp (not shown) for clamping the reinforced steel is mounted around the reinforced steel 10 surrounded by a first conductor 12 and a second conductor 14 as in the conventional method and then compressed.
  • the gap-type overhead conductor may be manufactured in various ways, and particularly a straight-angle conductor may be used as the first conductor 12 to form the gap G.
  • the conductor unit 13 may have two-layer structure as in this embodiment, but it may also have one layer or three or more layers as required.
  • the conductor unit 13 is dismantled as much as a predetermined length, and then a certain length corresponding to the gap portion around the reinforced steel 10 is filled using the filler 15 into a predetermined thickness.
  • an aluminum tape is wound around the reinforced steel 10, or an aluminum plate having a curve is inserted into the gap G.
  • a circular aluminum strand may be wound around the reinforced steel 10, and the gap G may be filled using other various ways.
  • the dismantlement length of the conductor unit 13 may be suitably selected for facilitating easy work, and this length is preferably not less than 30 cm and not more than 2 m. If the dismantlement length is less than 30 cm, it is difficult to execute the process of filling the filler 15, thereby deteriorating workability. If the dismantlement length is more than 2 m, the cable may be unnecessarily lost or the dismantled conductor may not be easily returned to its original state.
  • the filler 15 to be filled into the gap G preferably has a length greater than a length of a final compression portion (see FIG. 7). If the filler 15 has a length shorter than that of the final compression portion, the conductor unit may be deformed at regions out of the area filled with the filler, which may become a start point of the fracture.
  • the filled filler 15 preferably has a thickness capable of sufficiently filling the gap
  • a general gap-type overhead conductor has a gap of about 0.4 to 0.7 mm, and the filler 15 preferably has a thickness of 0.1 to 0.6 mm. If the filler 15 has a thickness less than 0.1 mm, the filled filler 15 gives insufficient effects, thereby not decreasing deformation of the final compression portion. If the filler 15 has a thickness greater than 0.6 mm, it becomes greater than the size of the gap of the overhead conductor or it is excessively filled, which may cause the compression force not to be suitably transferred.
  • the fracture strength is increased by about 17% in comparison to the fracture strength by the tensile load test for the overhead cable prepared according to the conventional clamping method in which a filler is not filled.
  • the fracture strength is substantially not changed in comparison to the comparative example 1.
  • the clamping method for a gap-type overhead cable according to the present invention may prevent deformation of an aluminum conductor at the end point of the compression portion while an aluminum sleeve is compressed, since the gap of the gap-type overhead cable is filled with a filler.
  • a compression pressure of a compressor is not exhausted due to the gap but transferred to the aluminum conductor, thereby improving the efficiency of the compressor.

Landscapes

  • Suspension Of Electric Lines Or Cables (AREA)

Abstract

La présente invention concerne un procédé de serrage pour un câble aérien de type à interstice contenant au moins une couche de brins d'aluminium disposée autour d'une armature d'acier pour former une unité conductrice, procédé qui utilise un cadre de serrage en acier et un manchon. Ce procédé de serrage comprend : (a) le montage et la compression du cadre en acier sur l'armature en acier ; (b) le désassemblage de l'unité conductrice sur une longueur prédéfinie et le remplissage d'un interstice formé entre l'armature en acier et l'unité conductrice avec un agent de remplissage constitué d'un matériau métallique ; (c) le rétablissement de l'unité conductrice désassemblée dans son état initial puis le montage et la compression du manchon d'aluminium sur l'unité conductrice.
PCT/KR2005/001887 2004-06-24 2005-06-17 Procede de serrage d'un conducteur aerien de type a interstice WO2006129897A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/555,597 US20070209227A1 (en) 2004-06-24 2005-06-17 Control Panel Assembly In Dryer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050047938A KR100751637B1 (ko) 2005-06-03 2005-06-03 간극형 가공 전선(架空電線)의 클램핑 방법
KR10-2005-0047938 2005-06-03

Publications (1)

Publication Number Publication Date
WO2006129897A1 true WO2006129897A1 (fr) 2006-12-07

Family

ID=37481796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/001887 WO2006129897A1 (fr) 2004-06-24 2005-06-17 Procede de serrage d'un conducteur aerien de type a interstice

Country Status (2)

Country Link
KR (1) KR100751637B1 (fr)
WO (1) WO2006129897A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000069189A (ko) * 1997-09-29 2000-11-25 후루가와 덴끼 고교 가부시키가이샤 가공전선
JP2003535435A (ja) * 2000-02-09 2003-11-25 エヌカーテー・ケーブルズ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング ケーブルのシーリング端部

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000207957A (ja) * 1999-01-12 2000-07-28 Sumitomo Electric Ind Ltd 間隙型送電線の製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000069189A (ko) * 1997-09-29 2000-11-25 후루가와 덴끼 고교 가부시키가이샤 가공전선
JP2003535435A (ja) * 2000-02-09 2003-11-25 エヌカーテー・ケーブルズ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング ケーブルのシーリング端部

Also Published As

Publication number Publication date
KR100751637B1 (ko) 2007-08-22
KR20060126207A (ko) 2006-12-07

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