WO1994009542A1 - Appareil pour la deconnexion et la transposition du blindage metallique de cables - Google Patents

Appareil pour la deconnexion et la transposition du blindage metallique de cables Download PDF

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Publication number
WO1994009542A1
WO1994009542A1 PCT/HU1993/000056 HU9300056W WO9409542A1 WO 1994009542 A1 WO1994009542 A1 WO 1994009542A1 HU 9300056 W HU9300056 W HU 9300056W WO 9409542 A1 WO9409542 A1 WO 9409542A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
tight housing
cable
shield parts
earthing
Prior art date
Application number
PCT/HU1993/000056
Other languages
English (en)
Inventor
Imre KÓRÓDI
József RITECZ
Mihály LACZKÓ
Original Assignee
Mkm Magyar Kábel Muvek Részvénytársaság
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 Mkm Magyar Kábel Muvek Részvénytársaság filed Critical Mkm Magyar Kábel Muvek Részvénytársaság
Priority to DE4395188T priority Critical patent/DE4395188T1/de
Priority to AU51181/93A priority patent/AU5118193A/en
Priority to DE4395188A priority patent/DE4395188C2/de
Publication of WO1994009542A1 publication Critical patent/WO1994009542A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/16—Earthing arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/103—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress
    • H02G15/105—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress connected to the cable shield only
    • H02G15/1055—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress connected to the cable shield only with cross-bonding of cable shields

Definitions

  • the invention refers to an apparatus for disconnecting and cross-bonding of a metallic shield of a cable, made with a vessel including elements for introducing first and second shield parts of phase conductors surrounded by respective sheaths made of a conductive material and an earthing terminal forming a part of a current way from one of the first and second shield parts through at least one voltage limiter and an earthing bar.
  • This apparatus is applicable for connecting, disconnecting and earthing of cable shields and sheaths at the ends of high voltage and high capacity cable lines and anywhere in the route of such cable lines.
  • the vessel as manufactured generally consists of a plastic composition of high mechanical strength ensured by reinforcing the walls of the box with glass fibers.
  • the electric equipment contained in the vessel is connected with a leakage unit (an earthing clamp) ensuring thereby the equipotential conditions.
  • the wall of the vessel is impervious to water.
  • introducing tube-type elements which receive the outer sheaths of respective phase conductors and are connected with the conductive sheaths of the cable.
  • the introducing elements fix the metallic shield parts of the conductive sheath wherein the mentioned shield parts form generally coaxial elements of the cable.
  • the shield parts are disconnected from the phase conductors and introduced together with the sheath into the inner space of the vessel where pairs of them are received in clamping units arranged in different distances from the outlets of the introducing tube-type elements and this is realized in that way that the first clamping units lying near to the outlets of the introducing tube- type elements receive the first shield parts of the phase conductors and the second shield parts of the phase conductors are linked with respective second clamping units which are arranged farther from the outlets of the introducing tube-type elements, i.e. behind the first clamping units when seen from the outlets.
  • the first clamping units are connected from one side to the inputs of respective voltage limiters, and from other side to the second clamping units by the means of connecting bars or passage conductors.
  • the outputs of the voltage limiters arranged in this cross-bond system are linked with a leakage conductor through an earthing bar and an earthing terminal prepared at the end of the earthing bar.
  • the filling material applied slows down the process of deteriorating the electric equipment by water but the water migrates within this material also and it is only question of time when it reaches the conductive parts of the cable causing many times heavy failures in the cable line. Because of the high voltage and the high strength of the current flowing in the cable water can cause also severe damages to the metallic parts of the device (cross-bond box). Of course, the failure of the cable lines can be experienced not only in these devices but when the cable line shows failure it is always necessary to ensure access to the inner space of the device for checking whether it operates normally, i.e. whether it is capable of assuring the equipotential conditions and whether the beginning of the way of penetration of water into the cable does not begin at this point.
  • the aim of the present invention is to give an appropriate solution to the problem depicted above.
  • the present invention is based on the recognition that the apparatus for connecting (disconnecting) and cross-bonding of conductive metallic shields of cables should be prepared and equipped with a pressure-tight vessel, i.e. it should contain sealed introducing tube-type elements and earthing clamps.
  • This construction is advantageous because of the possibility of very simple pressure control, and the measurement of the inner pressure gives information whether the failure of the cable line followed in the vessel or not - when water is present in the vessel the inner pressure decreases.
  • the object of the present invention is to prepare an apparatus of high electric strength sealed against entering water, wherein the apparatus arranged at the end or beginning of a cable line or cable line section renders it possible to simply detect whether the failure of the cable sheath followed within the apparatus.
  • the object of the invention is an apparatus for disconnecting and cross- bonding of a metallic shield of a cable, made with a vessel including elements for introducing first and second shield parts of phase conductors surrounded by respective sheaths made of a conductive material and an earthing terminal forming a part of a current way from one of the first and second shield parts through at least one voltage limiter and an earthing bar.
  • the vessel is constituted by a pressure-tight housing equipped with a holding wall arranged in the inner space of the pressure-tight housing, wherein the earthing terminal is fixed on the outer wall of the pressure-tight housing and the at least one voltage limiters connected to the first or the second shield part is fixed on the holding wall.
  • the inner construction of the apparatus can be simplified if the earthing bar is fixed on the inner holding wall.
  • the earthing bar is connected with the earthing terminal.
  • the sealed character of the apparatus of the invention can be maintained very long time if the introducing elements of the pressure-tight housing are equipped with packing glands surrounding in a pressure-tight way the first and second shield parts of the respective phase conductors.
  • the packing glands forming the parts of the introducing elements are capable of sealed fixation and holding of the sheath surrounding the first and second shield parts, hence, water cannot enter the inner space of the pressure-tight housing through the introducing elements.
  • the assemblage of the apparatus of the invention can be facilitated by the very advantageous embodiment wherein in the pressure-tight housing clamping units constituting first and second connecting terminals for fixing the first and the second shield parts of each of the phase conductors, respectively, are arranged, the first connecting terminals lying near to and the second connecting terminals lying farther from the introducing elements of the pressure-tight housing wherein pairs of the first and second connecting terminals receiving first and second shield parts of different phase conductors are linked by connecting bars or passage conductors.
  • This cross- bonded connection system is realized for example by that the clamping units are connected through respective bars with the earthing bar or constitute a part of the earthing bar. It is especially preferred when the clamping units forming first connecting terminals are prepared as a part of the earthing bar.
  • the pressurizing of the apparatus of the invention the measurements of the inner pressure can be carried out in a very simple manner in that advantageous embodiment wherein the pressure-tight housing comprises a valve arranged in its outer wall.
  • the handling is simplified in that advantageous embodiment of the apparatus of the invention wherein the pressure-tight housing consists of two outer parts made of stainless steel, the outer parts having respective flanges and connected oblong the flanges through a sealing insert.
  • the apparatus of the invention constitutes a unit of very long life-time, high reliability and facilitates the fault location in a cable line. It can be simply arranged in the cable line and if necessary filled up. with air or protective gas. It offers further an increase of the cable lodability by about 2 to 8 % and decrease of the losses in the cable line by about 5 to 20 % depending on the type and arrangement of the high-voltage cable.
  • Fig. 1. is the top view of the apparatus of the invention
  • Fig. 2. is a side-view cross-section of the apparatus of the invention
  • Fig. 3. represents the simplified link diagram realized with the electric parts of a cable in the apparatus of the invention.
  • the apparatus of the invention is generally applied in high voltage and high capacity cable lines for cross-bonding operations.
  • the phase conductor of a cable line is equipped with a sheath 2 which is arranged in a packing gland 1 ensuring hermetic sealing around it. Under the sheath 2 the phase conductors are disconnected from first and second shield parts 14 and 15 made of metal, the phase conductors remaining conducted outside of the apparatus.
  • the first and second shield parts 14 and 15 can be united with conductors in the inside of the apparatus of the invention as described later.
  • the packing gland 1 is arranged in the outer wall of a pressure-tight housing 7 made preferably of stainless steel.
  • a respective first connecting terminal 3 and a second connecting terminal 4 are prepared wherein the first connecting terminals 3 receive the first shield parts 14 and the second connecting terminals 4 receive the second shield parts 15 of the sheaths 2.
  • the first and second connecting terminals 3 and 4 are connected also with the respective conductors.
  • the first connecting terminals 3 are connected through respective passage bars 20 to the input of respective voltage limiters 19 being preferably of zinc oxide basis and the outputs of the last are connected with an earthing bar 6 fixed on a holding wall 18 arranged in the inner space of the pressure-tight housing 7.
  • the first connecting terminal 3 belonging to one of the phase conductors is connected with one of the second connecting terminals 4 of one of the other phase conductors by a passage conductor 13, the remaining two first connecting terminals 3 and the other two second connecting terminals 4 are connected in pairs belonging to different phase conductors by respective connecting bars 10.
  • the difference made herein between the passage conductor 13 and the connecting bar 10 is not necessary, this follows only from the purposes of illustration, because they can be of equal shape and consist of the same material.
  • the second connecting terminals 4 are preferably fixed on a holding plate 11 built-in into or constituting a part of the pressure-tight housing 7 and similarly, the first connecting terminals 3 are arranged on respective conductive bars 21.
  • the earthing bar 6 is connected to an earthing terminal 5 through a leakage conductor 12.
  • the earthing terminal 5 crosses the outer wall of the pressure-tight housing 7 and can be connected to an earthing unit through a leakage conductor 17 (Figs 1 and 2).
  • a valve 9 In the outer wall of the pressure-tight housing 7 it is preferred to arrange a valve 9 whereby a passage-way for pressurizing the inner space of the pressure-tight housing 7 and/or for measuring the inner pressure is ensured.
  • the pressure-tight housing 7 is preferably made of two halves generally of different shapes and advantageously of a lower half shown in Fig. 1 and a cover forming an upper part not shown in the drawings. The lower part and similarly the cover are limited by respective flanges 16 having plane surface and in this surface a riffle 22 is prepared for receiving a sealing insert 8 made of a flexible material.
  • the lower half and the cover can be united and pressed to one another by screws or other fixing elements and the pressure-tight housing 7 prepared in this way can be reliably sealed according to the known principles.
  • the inner space of the pressure-tight housing can be filled up also with air or other appropriate gas through the valve 9.
  • the pressure-tight character of the housing can be ensured in another way, too, neither the use of the valve 9 nor the application of the sealing insert 8 is necessary, the construction can be manufactured in any other known manner applicable in the manufacture of the pressurizable vessels.
  • Both halves of the pressure-tight housing 7, as mentioned, are made preferably of stainless steel, the holding plate 11 is aimed to give fixation the parts carrying the first and second connecting terminals 3 and 4.
  • Fig. 3 a schematic electric link diagram of the apparatus of the invention is shown. It is clear from this figure that common points of the first and second shield parts 14 and 15 belonging to different phase conductors are in pairs connected with an earthing unit through the voltage limiters 19 and in this way it is ensured that the first and second shield parts 14 and 15 form equipotential electric conducting elements of the cable line, i.e. no potential difference can be measured between them.
  • the pressure-tight housing 7 can be filled up with an insulating material up to the level of the first and second connecting terminals 3 and 4 and this insulating material gives protection of the electric equipment within the pressure-tight housing 7 against water which incidentally can enter the inner space thereof. Thereby also the process of a penetrating the cable by water is delayd from the pressure-tight housing 7.
  • the apparatus of the invention can be applied similarly to the known devices (cross-bond boxes). The only difference is that after arranging the conductive sheaths and the first and second shield parts of the phase conductors the pressure-tight housing is closed and if necessary pressurized. When it is suspected that the failure of the cable line followed within the pressure-tight housing and the loss of the pressure-tight character of the housing can be stated it is necessary only to measure the inner pressure for localizing this kind of failure.
  • the pressure-tight housing can be simply opened because of the two-part construction and because it can be and is regularly arranged within a cable manhole.
  • the apparatus of the invention is applicable for connecting and disconnecting, further for earthing cable sheaths and metallic shield parts in any place of a high voltage and high capacity cable line. It is especially suitable for preparing sections of a long distance cross-bonded cable line and can be applied also in continuous cable lines.
  • the access to the apparatus is provided during sheath test and sheath fault location.
  • the apparatus offers remarkable savings in costs of operating a cable line because of facilitating the maintenance and ensuring savings in the power transmission. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cable Accessories (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

L'invention se rapporte à un appareil pour la déconnexion et la transposition du blindage métallique d'un câble, l'appareil étant composé d'une boîte contenant des éléments d'introduction destinés à recevoir des première et seconde parties de blindage (14, 15) de fils conducteurs de phase, entourés par des gaines correspondantes (2) en matériau hautement conducteur, tel que notamment du métal, ainsi qu'une borne de mise à la terre (5) formant une partie de la voie conductrice de courant, qui part de l'une des première et seconde parties de blindage (14, 15) et traverse au moins un limiteur de tension (19) et une barre de mise à la terre (6). Dans ledit appareil, la boîte est constituée par un logement à l'épreuve de la pression (7) pourvu d'une paroi de retenue (18) disposée dans l'espace intérieur du logement à l'épreuve de la pression. La borne de mise à la terre (5) est fixée à la paroi extérieure du logement à l'épreuve de la pression (7) et le limiteur de tension (19) ou l'un au moins des limiteurs de tension (19), connecté en un point commun des première et seconde parties de blindage (14, 15), est fixé sur la paroi de retenue (18).
PCT/HU1993/000056 1992-10-09 1993-09-29 Appareil pour la deconnexion et la transposition du blindage metallique de cables WO1994009542A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4395188T DE4395188T1 (de) 1992-10-09 1993-09-29 Vorrichtung zur Entkoppelung und Kreuzverbindung von leitenden Hüllen eines Kabels
AU51181/93A AU5118193A (en) 1992-10-09 1993-09-29 Apparatus for disconnecting and cross-bonding of a metallic shield of a cable
DE4395188A DE4395188C2 (de) 1992-10-09 1993-09-29 Vorrichtung zum Lösen und Kreuzverbinden von Kabelabschirmungen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUP9203201 1992-10-09
HU9203201A HU216201B (hu) 1992-10-09 1992-10-09 Berendezés kábel vezető anyagú köpenyének bontására és fázisforgatására

Publications (1)

Publication Number Publication Date
WO1994009542A1 true WO1994009542A1 (fr) 1994-04-28

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ID=10982412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1993/000056 WO1994009542A1 (fr) 1992-10-09 1993-09-29 Appareil pour la deconnexion et la transposition du blindage metallique de cables

Country Status (4)

Country Link
AU (1) AU5118193A (fr)
DE (2) DE4395188T1 (fr)
HU (1) HU216201B (fr)
WO (1) WO1994009542A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT404197B (de) * 1995-03-31 1998-09-25 Felten & Guilleaume Energie Schaltungsanordnung für ein aus einleiterkabeln bestehendes hochspannungsdrehstromkabel
CN104104029A (zh) * 2014-06-18 2014-10-15 国家电网公司 一种可监测负载状态的高压电缆多功能接地装置
CN104113005A (zh) * 2014-06-18 2014-10-22 国家电网公司 一种高压电缆多功能接地装置
CN104485628A (zh) * 2014-12-09 2015-04-01 国家电网公司 高压电缆线路一体式接地箱
CN105322497A (zh) * 2015-12-10 2016-02-10 广东电网有限责任公司东莞供电局 一种高压电缆多功能接地箱
WO2016190824A1 (fr) * 2015-05-28 2016-12-01 Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ Boîtiers de liaison étanches à l'eau et très résistants pour liaison transversale de systèmes de câbles à très haute tension
CN110430710A (zh) * 2019-08-02 2019-11-08 江苏科技大学 一种用于空调外机使用的电器盒

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103427390B (zh) * 2013-08-24 2016-01-06 广州友智电气技术有限公司 智能型交叉互联箱装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235446A1 (de) * 1972-04-11 1973-10-18 Peyer Siegfried Hochspannungs-abzweigeinrichtung
US4237333A (en) * 1977-09-02 1980-12-02 Asea Aktiebolag High voltage insulated cable terminations

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT16325B (de) * 1902-08-05 1904-05-25 Josef Jindrisek Regelungsvorrichtung der Fördergeschwindigkeit für selbsttätige Bierfaßaufzüge.
DE4102114C2 (de) * 1991-01-25 1994-01-20 Rheydt Kabelwerk Ag Verfahren zum zyklischen Auskreuzen von Kabelmänteln

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235446A1 (de) * 1972-04-11 1973-10-18 Peyer Siegfried Hochspannungs-abzweigeinrichtung
US4237333A (en) * 1977-09-02 1980-12-02 Asea Aktiebolag High voltage insulated cable terminations

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT404197B (de) * 1995-03-31 1998-09-25 Felten & Guilleaume Energie Schaltungsanordnung für ein aus einleiterkabeln bestehendes hochspannungsdrehstromkabel
CN104104029A (zh) * 2014-06-18 2014-10-15 国家电网公司 一种可监测负载状态的高压电缆多功能接地装置
CN104113005A (zh) * 2014-06-18 2014-10-22 国家电网公司 一种高压电缆多功能接地装置
CN104485628A (zh) * 2014-12-09 2015-04-01 国家电网公司 高压电缆线路一体式接地箱
WO2016190824A1 (fr) * 2015-05-28 2016-12-01 Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ Boîtiers de liaison étanches à l'eau et très résistants pour liaison transversale de systèmes de câbles à très haute tension
CN105322497A (zh) * 2015-12-10 2016-02-10 广东电网有限责任公司东莞供电局 一种高压电缆多功能接地箱
CN110430710A (zh) * 2019-08-02 2019-11-08 江苏科技大学 一种用于空调外机使用的电器盒
CN110430710B (zh) * 2019-08-02 2020-12-25 江苏科技大学 一种用于空调外机使用的电器盒

Also Published As

Publication number Publication date
HU216201B (hu) 1999-07-28
AU5118193A (en) 1994-05-09
DE4395188T1 (de) 1994-11-10
HU9203201D0 (en) 1993-03-01
DE4395188C2 (de) 1999-03-04

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