SE501342C2 - Insulated end for high voltage cable insulated with fixed insulating material - enables connection of cable to pressure gas-insulated conductor in gas-insulated switchgear with cable end inserted into encapsulant filled with pressure gas - Google Patents

Insulated end for high voltage cable insulated with fixed insulating material - enables connection of cable to pressure gas-insulated conductor in gas-insulated switchgear with cable end inserted into encapsulant filled with pressure gas

Info

Publication number
SE501342C2
SE501342C2 SE9302014A SE9302014A SE501342C2 SE 501342 C2 SE501342 C2 SE 501342C2 SE 9302014 A SE9302014 A SE 9302014A SE 9302014 A SE9302014 A SE 9302014A SE 501342 C2 SE501342 C2 SE 501342C2
Authority
SE
Sweden
Prior art keywords
cable
insulated
flange
gas
pressure gas
Prior art date
Application number
SE9302014A
Other languages
Swedish (sv)
Other versions
SE9302014D0 (en
SE9302014L (en
Inventor
Leif Johansson
Lars Kaellberg
Original Assignee
Kabeldon Ab
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 Kabeldon Ab filed Critical Kabeldon Ab
Priority to SE9302014A priority Critical patent/SE501342C2/en
Publication of SE9302014D0 publication Critical patent/SE9302014D0/en
Publication of SE9302014L publication Critical patent/SE9302014L/en
Publication of SE501342C2 publication Critical patent/SE501342C2/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00Cable fittings
    • H02G15/02Cable terminations
    • H02G15/06Cable terminating boxes, frames or other structures
    • H02G15/064Cable terminating boxes, frames or other structures with devices for relieving electrical stress

Landscapes

  • Cable Accessories (AREA)
  • Insulating Bodies (AREA)
  • Gas Or Oil Filled Cable Accessories (AREA)

Abstract

The cable end is inserted in the encapsulant via a field controlling component (11,12) and fixed against a coupling flange (5). The field controlling component is of rubber or similar elastic material, and has a ring-shaped track (17) facing towards the flange. This track is at least mostly filled with a number of ring segments (18) locating against the flange and which correspond to the ring-shape track (17) geometry. The ring segments (18) are made of a rigid polymer material. The flange (5) has a collaring arrangement (14) with a cylindrical cover surface around the cable insertion aperture (4), against which the field controlling component (11,12) is fixed in a gastight manner with the aid of a clamp device (15). The collar formation end part comprises a ring-shaped extension (16) directed radially towards the cable, against which the ring segments locate (18).

Description

501 342 2 vilket kan medföra risk för bildning av inre spalter när belastningen sjunker från ett högt till ett lägre värde. I sådana spalter kan i vissa fall gnisturladdningar uppträda, som successivt förstör isoleringen. 501 342 2 which can lead to the risk of the formation of internal gaps when the load drops from a high to a lower value. In such columns can in some cases of spark discharges occur, which gradually destroy the insulation.

REDOGÖRELSE FÖR UPPFINNINGEN Ändamålet med föreliggande uppfinning är att åstadkomma en kabelavslutning av ovannämnda slag som inte är behäftad med den nämnda svagheten hos den tidigare kända konstruktionen. Detta uppnås enligt uppfinningen genom en konstruktion som uppvisar de i patentkrav 1 i angivna kännetecknen. Enligt uppfinningen är utrymmet "bakom" den fältstyrande komponenten fyllt med ett antal ringsegment som svarar mot den fältstyrande komponentens geometri och praktiskt taget helt fyller utrymmet mot kapslingsflänsen. Genom en sådan konstruktion uppnås att den kraft som gastrycket ger överförs med hjälp av segmenten på ett optimalt sätt till kapslingsflänsen, samtidigt som ett aktivt tryck bibehålles mellan den fältstyrande komponenten och kabelisole- ringen. Därigenom elimineras risken för att kritiska inre spalter bildas.DESCRIPTION OF THE INVENTION The object of the present invention is to provide a cable termination of the aforesaid kind which is not afflicted with the said weakness of it previously known construction. This is achieved according to the invention by a construction having the features specified in claim 1. According to According to the invention, the space "behind" the field control component is filled with a number of ring segments corresponding to the geometry of the field control component and practically completely fills the space against the housing flange. Through such construction it is achieved that the force which the gas pressure gives is transmitted by means of the segments in an optimal way to the housing flange, at the same time as one active pressure is maintained between the field control component and the cable insulation the ring. This eliminates the risk of critical internal gaps forming.

FIGURBESKRIVNING Uppfinningen skall förklaras närmare genom beskrivning av ett utförings- exempel under hänvisning till bifogade ritning, där fig 1 visar i axialsnitt en kabelavslutning enligt uppfinningen, och fig 2 visar ett tvärsnitt genom kabelavslutningen efter linjen II-II i fig 1.DESCRIPTION OF FIGURES The invention will be explained in more detail by describing an embodiment example with reference to the accompanying drawing, where Fig. 1 shows in axial section a cable termination according to the invention, and Fig. 2 shows a cross section through the cable termination along the line II-II in fig 1.

BESKRIVNING AV UTFÖRINGSEXEMPEL Ritningen visar en PEX-kabel 1, vars preparerade ände är ansluten till en tryckgasisolerad ledare 2, vilken är centralt monterad i en med tryckgas fylld metallkapsling 3. Den trycksatta gasen utgöres företrädesvis av SF6-gas med ett tryck av storleksordningen 0,5 MPa.DESCRIPTION OF EMBODIMENTS The drawing shows a PEX cable 1, the prepared end of which is connected to one pressure gas insulated conductor 2, which is centrally mounted in one with pressurized gas filled metal housing 3. The pressurized gas is preferably made of SF6 gas with a pressure of the order of 0.5 MPa.

Kabeländen är införd i kapslingen genom en öppning Q i en fläns 5. En topp- bult 6 är t ex genom svetsning sammanfogad med den avisolerade kabelleda- ren, och en omslutande hylsa 7 av elastiskt material tätar och skärmar skarven mellan kabeln och toppbulten. 3 501 342 Toppbulten 6 är inskjuten i det såsom hylskontakt utformade ändpartiet 8 hos ledaren 2, varvid kontaktförbindelsen mellan toppbulten 6 och ledaren 2 sker via spiralkontaktelement 9. Kabeln 1 är axiellt fixerad relativt leda- ren 2 med hjälp av en i toppbultens axiella förlängning orienterad drag- stång 10, varigenom kabeln hindras från att skjutas ut ur kapslingen av gastrycket.The cable end is inserted into the housing through an opening Q in a flange 5. A top bolt 6 is joined, for example, by welding to the stripped cable member. clean, and an enclosing sleeve 7 of elastic material seals and screens the joint between the cable and the top bolt. 3 501 342 The top bolt 6 is inserted into the end portion 8 designed as a sleeve contact of the conductor 2, the contact connection between the top bolt 6 and the conductor 2 takes place via spiral contact element 9. The cable 1 is axially fixed relative to the conductor. 2 by means of a tension oriented in the axial extension of the top bolt. rod 10, thereby preventing the cable from sliding out of the housing gas pressure.

För att undvika höga elektriska fältkoncentrationer är kabelavslutningen försedd med en fältstyrande komponent (s k stresskona) bestående av en isolerande del 11, utförd av krypströmssäkert syntetgummi, t ex eten- propen-dien-gummi, sammanvulkad med en halvledande del 12 som svarar för fältstyrningen. Denna halvledande del 12 har utsträckts längs kabeln så att den anslutes till kabelns yttre halvledande skikt 13.To avoid high electric field concentrations, the cable termination equipped with a field control component (so-called stress cone) consisting of a insulating part 11, made of creep-current-proof synthetic rubber, e.g. propylene-diene rubber, vulcanized with a semiconductor member 12 corresponding to field control. This semiconductor part 12 has been extended along the cable so that it is connected to the outer semiconductor layer 13 of the cable.

Flänsen 5 är försedd med en uppkragning lfl med cylindrisk mantelyta. mot vilken den fältstyrande komponenten är gastätt fixerad med hjälp av en klämanordning 15, t ex i form av slangklämmor eller dylikt.The flange 5 is provided with a collar 1 fl with a cylindrical circumferential surface. against which the field control component is gas-tight fixed by means of a clamping device 15, for example in the form of hose clamps or the like.

Uppkragningens ändparti utgöres av en radiellt mot kabeln riktad ringformig ansats 16. Mellan denna ansats och den fältstyrande komponenten 11, 12 finns ett ringformigt spår 17, vilket är tillnärmelsevis fyllt av ett antal, i det visade exemplet 10 stycken, ringsegment 18 som svarar mot det ringformiga spårets 17 geometri. Ringsegmenten 18 kan exempelvis vara fram- ställda i ett styvt polymert material. Den kraft som gastrycket förorsakar överföres med hjälp av segmenten 18 på ett optimalt sätt till metallflänsen 5, samtidigt som den fältstyrande komponenten 11, 12 bibehåller sin flexi- bilitet mot kabeln 1. Vid montage innebärande ökning av det ringformiga spårets inre diameter kan segmenten 18 följa med, och deras inbördes avstånd ökar något.The end portion of the collar consists of an annularly directed radially towards the cable shoulder 16. Between this shoulder and the field control component 11, 12 there is an annular groove 17, which is approximately filled with one number, in the example shown 10 pieces, ring segment 18 corresponding to it the geometry of the annular groove 17. The ring segments 18 may, for example, be set in a rigid polymeric material. The force that the gas pressure causes transmitted by means of the segments 18 in an optimal way to the metal flange 5, while the field control component 11, 12 maintains its flexibility. stability to the cable 1. When mounting means increasing the annular the inner diameter of the groove, the segments 18 can follow, and their mutual distance increases slightly.

Flänsen 5 uppbär på sin utåtvända sida en hylsformig muffkropp 19 för koaxiell fixering av kabeln 1 i förhållande till införingsöppningen U i flänsen 5. Genom att kabeln styrs upp mekaniskt på detta sätt undvikes att den fältstyrande komponenten 11, 12 deformeras om kabeln påverkas av transversella krafter. Utrymmet 20 mellan muffkroppen 19 och kabeln 1 innehåller luft av atmosfärstryck.The flange 5 carries on its outwardly facing side a sleeve-shaped sleeve body 19 for coaxial fixation of the cable 1 in relation to the insertion opening U i the flange 5. By mechanically guiding the cable in this way, it is avoided that the field control component 11, 12 is deformed if the cable is affected by transverse forces. The space 20 between the socket body 19 and the cable 1 contains air of atmospheric pressure.

Claims (5)

501 342 PATENTKRAV501 342 PATENT CLAIMS 1. Kabelavslutning för en med fast isolermaterial isolerad högspännings- kabel (1) avsedd att anslutas till en tryckgasisolerad ledare (2), varvid kabeländen är monterad i en med tryckgas fylld kapsling (3) och införd i kapslingen via en mot en kapslingsfläns (5) fixerad fältstyrande komponent (11, 12) av gummi eller liknande elastiskt material, vilken uppvisar ett mot flänsen vänt ringformigt spår (17), k ä n n e t e c k n a d av att det ringformiga spåret (17) är åtminstone tillnärmelsevis fyllt av ett antal mot flänsen (5) anliggande ringsegment (18) som svarar mot det ring- formiga spàrets (17) geometri.Cable termination for a high-voltage cable (1) insulated with solid insulating material intended to be connected to a pressurized gas-insulated conductor (2), the cable end being mounted in a gas-filled housing (3) and inserted into the housing via a housing flange (5) fixed field guide component (11, 12) of rubber or similar elastic material, which has an annular groove (17) facing the flange, characterized in that the annular groove (17) is at least approximately filled with a number of anti-flange (5) ) adjacent ring segments (18) corresponding to the geometry of the annular groove (17). 2. Kabelavslutning enligt patentkrav 1, k ä n n e t e c k n a d av att ringsegmenten (18) är utförda i ett styvt polymert material.Cable termination according to claim 1, characterized in that the ring segments (18) are made of a rigid polymeric material. 3. Kabelavslutning enligt patentkrav 1 eller 2, k ä n n e t e c k n a d av att flänsen (5) har en runt kabelns införingsöppning (4) anordnad upp- kragning (lß) med cylindrisk mantelyta, mot vilken den fältstyrande kompo- nenten (11, 12) är gastätt fixerad med hjälp av en klämanordning (15).Cable termination according to Claim 1 or 2, characterized in that the flange (5) has a screw-on (lß) arranged with a cylindrical circumferential surface arranged around the insertion opening (4), against which the field-controlling component (11, 12) is gas-tight fixed by means of a clamping device (15). U. Kabelavslutning enligt patentkrav 3, k ä n n e t e c k n a d av att uppkragningens (lfl) ändparti utgöres av en radiellt mot kabeln riktad ring- formig ansats (16), mot vilken ringsegmenten (18) anligger.U. Cable termination according to claim 3, characterized in that the end portion of the collar (l fl) consists of an annular shoulder (16) directed radially towards the cable, against which the ring segments (18) abut. 5. Kabelavslutning enligt något av föregående patentkrav, k ä n n e - t e o k n a d av att flänsen (5) på sin utåtvända sida uppbär en hyls- formig muffkropp (19) för koaxiell fixering av kabeln (1) i förhållande till införingsöppningen (4).Cable termination according to one of the preceding claims, characterized in that the flange (5) carries on its outwardly facing side a sleeve-shaped sleeve body (19) for coaxial fixation of the cable (1) relative to the insertion opening (4).
SE9302014A 1993-06-11 1993-06-11 Insulated end for high voltage cable insulated with fixed insulating material - enables connection of cable to pressure gas-insulated conductor in gas-insulated switchgear with cable end inserted into encapsulant filled with pressure gas SE501342C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9302014A SE501342C2 (en) 1993-06-11 1993-06-11 Insulated end for high voltage cable insulated with fixed insulating material - enables connection of cable to pressure gas-insulated conductor in gas-insulated switchgear with cable end inserted into encapsulant filled with pressure gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9302014A SE501342C2 (en) 1993-06-11 1993-06-11 Insulated end for high voltage cable insulated with fixed insulating material - enables connection of cable to pressure gas-insulated conductor in gas-insulated switchgear with cable end inserted into encapsulant filled with pressure gas

Publications (3)

Publication Number Publication Date
SE9302014D0 SE9302014D0 (en) 1993-06-11
SE9302014L SE9302014L (en) 1994-12-12
SE501342C2 true SE501342C2 (en) 1995-01-23

Family

ID=20390248

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9302014A SE501342C2 (en) 1993-06-11 1993-06-11 Insulated end for high voltage cable insulated with fixed insulating material - enables connection of cable to pressure gas-insulated conductor in gas-insulated switchgear with cable end inserted into encapsulant filled with pressure gas

Country Status (1)

Country Link
SE (1) SE501342C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009762A1 (en) * 1995-09-05 1997-03-13 Asea Brown Boveri Ab Cable termination
US9912140B2 (en) 2014-02-19 2018-03-06 Abb Hv Cables (Switzerland) Gmbh Power cable termination device for gas-insulated switchgear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009762A1 (en) * 1995-09-05 1997-03-13 Asea Brown Boveri Ab Cable termination
US9912140B2 (en) 2014-02-19 2018-03-06 Abb Hv Cables (Switzerland) Gmbh Power cable termination device for gas-insulated switchgear
USRE48918E1 (en) 2014-02-19 2022-02-01 Nkt Hv Cables Ab Power cable termination device for gas-insulated switchgear

Also Published As

Publication number Publication date
SE9302014D0 (en) 1993-06-11
SE9302014L (en) 1994-12-12

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