EP0895641B1 - Corps central isolant resistant aux hautes tensions - Google Patents

Corps central isolant resistant aux hautes tensions Download PDF

Info

Publication number
EP0895641B1
EP0895641B1 EP97918475A EP97918475A EP0895641B1 EP 0895641 B1 EP0895641 B1 EP 0895641B1 EP 97918475 A EP97918475 A EP 97918475A EP 97918475 A EP97918475 A EP 97918475A EP 0895641 B1 EP0895641 B1 EP 0895641B1
Authority
EP
European Patent Office
Prior art keywords
core body
mould
flexible
tape
onto
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP97918475A
Other languages
German (de)
English (en)
Other versions
EP0895641A1 (fr
Inventor
Björn JACOBSON
Peter Asmo
Göran Palmers
Conny Linusson
Olof Heyman
Göran Holmström
Martin Sterner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB AB
Original Assignee
ABB 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 ABB AB filed Critical ABB AB
Publication of EP0895641A1 publication Critical patent/EP0895641A1/fr
Application granted granted Critical
Publication of EP0895641B1 publication Critical patent/EP0895641B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies

Definitions

  • the present invention relates to a method of producing an insulating core body of a high voltage resistant device, e.g. a bushing, a measurement transformer, a switching device, a breaker or the like, the core body being produced by winding a web of insulating material, such as paper, onto a mandrel and impregnating the wound web material with a curable resin in a mould.
  • a high voltage resistant device e.g. a bushing, a measurement transformer, a switching device, a breaker or the like
  • the core body being produced by winding a web of insulating material, such as paper, onto a mandrel and impregnating the wound web material with a curable resin in a mould.
  • a high voltage current is passed through a partition, such as a wall or a tank, via a central conductor extending inside a hollow insulating core body.
  • the latter is normally produced by winding a strip of paper onto a mandrel and impregnating the wound paper with a curable resin in a mould.
  • the object of the present invention is to drastically reduce the number of different moulds and to provide a flexible system enabling the production of a great variety of insulating core bodies for each type of high voltage resistant device.
  • At least a part of the mould is formed by an adhesive, flexible tape which is wound externally onto the wound web material so as to form a mould shell and which is resistant and impermeable to the resin.
  • the tape will form at least one tight layer which encloses the insulating core body so as to function as a mould shell when the core body is impregnated with a curable resin.
  • the mould shell can be combined with other mould parts, e.g. in combination with an external tubular member which is to form an integral part of the finished device.
  • two kinds of material can be used to form the mould shell or a part thereof.
  • a first kind of tape may be wound directly onto the insulating core body to form an inner tight layer and a second kind, to be used several times in the production, is then wound externally to form a strong and rigid outer layer of the mould shell.
  • the inner layer may be formed by a flexible hose which is slipped onto the core body, the outer layer being formed by a tape which is wound onto the hose.
  • the mould shell is preferably removed mechanically, e.g. by a machining operation, such as by turning.
  • the bushing shown in figure 1 comprises an insulating, hollow core body 1 and a central conductor 2 extending along the axis of the bushing. At the axial end portions, there are top and bottom end walls 3 and 4, respectively, serving as parts of a mould during production of the bushing.
  • the insulating core body 1 is produced by winding a strip of paper onto a mandrel, formed by the central conductor 2 in the illustrated embodiment, and impregnating the wound paper with a curable resin in a mould.
  • the mould is partly formed by an adhesive, flexible tape 5 which is wound externally onto the core body 1 and which is resistant and impermeable to the resin.
  • the tape has a large width, e.g. 20 cm or even wider, and is wound with overlap in a helical configuration so as to form at least one tight layer.
  • the tape may alternatively be as wide as the length of the core body. Then, it is sufficient to wind it around the core body in one lap.
  • the tape comprises a flexible foil material and an adhesive coating on at least one side thereof.
  • the foil material may be paper or a thermoplastic material, such as polypropylene or polyester, whereas the adhesive coating may be a silicone-based or acrylic-based glue or natural rubber.
  • an outer flexible strip externally onto the adhesive tape 5.
  • a strip 5a may be constituted by a stronger and more expensive adhesive tape or a foil material without adhesive properties, such as a thermoplastic foil material, possibly reinforced by fibers to make it stronger and less elastic but yet flexible.
  • the outer flexible strip 5a is wound externally with overlap and can be removed and used over again several times in the production.
  • a curable resin such as an epoxy resin with a curing agent
  • a curable resin is fed through a flexible hose 6 from a funnel 7 to a nozzle 8 in the lower mould part 4, whereby the paper core 1 is slowly impregnated in its entirety. Excess resin will flow out through an outlet channel 9 in the upper mould part 3 to an outlet collecting funnel 10.
  • the mould parts 3, 4 and 5a are removed upon detaching upper and lower hose clamps (not shown) having being used to securely fix the upper and lower ends of the mould shell 5, 5a.
  • the adhesive tape 5, which is firmly bound to the insulating core 1, is preferably removed by a machining operation, such as by turning.
  • the embodiment shown in figures 3 and 4 is quite similar to the one shown in figures 1 and 2, the only difference being that the upper part of the insulating core 1 is enclosed by a prefabricated tube member 11 of elastomeric material, which forms a permanent integral part of the finished bushing.
  • the tube member 11 is used as a part of the external mould during the impregnating and curing operation.
  • the mould shell formed by the adhesive tape 5 and a possible outer layer 5a is only applied onto the lower part of the insulating core 1.
  • FIG. 5 there is shown another embodiment, viz a measurement transformer for measuring a current flowing therethrough.
  • the transformer includes a central conductive rod 2', having terminal end portions 2'a, 2'b for external connection, and a tubular insulating core body 1' which has been produced substantially in the same way as the bushing shown in figs. 1 and 2.
  • the outside surface 5' has been machined so as to remove the mould shell.
  • a transformer ring core 20, with inductive coils (not shown) and an annular insulating casing 21, is arranged so as to enclose the core body 1'.
  • the insulating core body may be formed by a different material than paper, such as a plastic foil, preferably treated so as to form voids or channels upon being wound onto a mandrel.
  • the resin may be fed into the core body directly from a moulding apparatus, if desired under pressure so as to accelerate the impregnating process.
  • the mould shell may include two or more flexible layers applied to the core body, at least one such layer being formed by the flexible tape.
  • one of the layers, in particular an inner layer may be formed by a flexible tube or hose of a thin thermoplastic material, the tube or hose being slipped onto the core body.

Landscapes

  • Insulating Bodies (AREA)
  • Insulators (AREA)

Claims (10)

  1. Procédé de production d'un corps (1, 1') formant âme isolante d'un dispositif résistant aux hautes tensions, le corps formant âme isolante étant produit en enroulant un ruban de matériau isolant sur un mandrin (2, 2') et en imprégnant le matériau de ruban enroulé d'une résine pouvant durcir dans un moule, caractérisé en ce qu'au moins une partie du moule est formée par une bande (5) adhésive souple, qui est enroulée extérieurement sur le corps formant âme de manière à former une coquille de moule et qui est résistante et imperméable à la résine.
  2. Procédé suivant la revendication 1, dans lequel au moins deux couches souples sont appliquées sur le corps formant âme de manière à former la coquille de moule, au moins l'une des couches souples étant formée par la bande (5, 5a) souple.
  3. Procédé suivant la revendication 2, dans lequel la bande (5) souple est enroulée directement sur le corps formant âme isolante pour former une couche intérieure étanche de la coquille de moule, une bande (5a) extérieure souple étant alors enroulée extérieurement sur la bande (5) pour former une couche extérieure rigide et résistante de la coquille de moule.
  4. Procédé suivant la revendication 2 ou 3, dans lequel l'une des couches (5a) souples comporte un matériau en feuille.
  5. Procédé suivant la revendication 2 ou 3, dans lequel une couche intérieure des couches souples comporte un tuyau souple qui est glissé sur le corps formant âme.
  6. Procédé suivant l'une quelconque des revendications 1 à 5, dans lequel la coquille de moule est renforcée par des fibres.
  7. Procédé suivant l'une quelconque des revendications 1 à 6, dans lequel une première partie du moule est constituée par un élément (11) extérieur tubulaire formant une partie d'une pièce du dispositif résistant aux hautes tensions, tandis qu'une deuxième partie du moule est formée par la coquille (5, 5a) de moule.
  8. Procédé suivant l'une quelconque des revendications précédentes, dans lequel la coquille (5, 5a) de moule est retirée lors du durcissement de la résine.
  9. Procédé suivant l'une quelconque des revendications précédentes, dans lequel la bande (5) a une largeur de 5 à 20 cm et est enroulée sur le corps (1) formant âme isolante suivant une configuration hélicoïdale de manière à former au moins une couche étanche qui enferme le corps formant âme isolante, éventuellement en combinaison avec d'autres parties (3, 4, 11) de moule.
  10. Procédé suivant l'une quelconque des revendications précédentes, dans lequel la bande (5) comporte un matériau de feuille souple, telles que du polypropylène, du polyester ou du papier, et un revêtement adhésif sur au moins un côté du matériau de feuille, telle qu'une colle à base d'acrylique ou à base de silicone ou un caoutchouc naturel.
EP97918475A 1996-04-22 1997-04-22 Corps central isolant resistant aux hautes tensions Expired - Lifetime EP0895641B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9601524A SE513344C2 (sv) 1996-04-22 1996-04-22 Genomföringskärna
SE9601524 1996-04-22
PCT/SE1997/000677 WO1997040505A1 (fr) 1996-04-22 1997-04-22 Corps central isolant resistant aux hautes tensions

Publications (2)

Publication Number Publication Date
EP0895641A1 EP0895641A1 (fr) 1999-02-10
EP0895641B1 true EP0895641B1 (fr) 2005-06-08

Family

ID=20402291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918475A Expired - Lifetime EP0895641B1 (fr) 1996-04-22 1997-04-22 Corps central isolant resistant aux hautes tensions

Country Status (6)

Country Link
EP (1) EP0895641B1 (fr)
JP (1) JP2000509189A (fr)
AU (1) AU2656997A (fr)
DE (1) DE69733474T2 (fr)
SE (1) SE513344C2 (fr)
WO (1) WO1997040505A1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913673A1 (de) * 1979-04-05 1980-10-16 Felten & Guilleaume Carlswerk Hochspannungsdurchfuehrung in freiluftausfuehrung

Also Published As

Publication number Publication date
EP0895641A1 (fr) 1999-02-10
WO1997040505A1 (fr) 1997-10-30
DE69733474T2 (de) 2006-03-23
SE9601524D0 (sv) 1996-04-22
SE9601524L (sv) 1997-10-23
DE69733474D1 (de) 2005-07-14
SE513344C2 (sv) 2000-08-28
AU2656997A (en) 1997-11-12
JP2000509189A (ja) 2000-07-18

Similar Documents

Publication Publication Date Title
AU674020B2 (en) Insulator structure and method of construction
US2997529A (en) Electrical insulating rod
US3828353A (en) Integrally-wound antenna helix-coilform
US5594827A (en) Electrical insulator equipped with optical fibers, and manfacturing method therefor
CN102054566B (zh) 变压器绕组和用于增强变压器绕组的方法
CA1044344A (fr) Mode de fabrication de bague de condensateur en resine fondue et a elements d'espacement entre les sections du condensateur
CN100524550C (zh) 低电压复合材料模具
EP0895641B1 (fr) Corps central isolant resistant aux hautes tensions
EP1218157B1 (fr) Procede de fabrication d'une bobine de transformateur avec un moule jetable obtenu par enveloppement et enrubannage, et mandrin d'enroulement integre
US6936128B2 (en) Reinforced, pressure-resistant flexible tube for mechanical end-winding support for rotating electrical machines
US20080012442A1 (en) Insulating cover for a bar to bar connection of a stator winding of an electric machine
CA1138167A (fr) Methode et dispositif d'assemblage de sections de tuyau souple
US6203647B1 (en) Method of producing a wound insulating pipe
JPH0780255B2 (ja) フィラメント巻付けによって製造される絶縁管
US5935704A (en) Incremental filament wound pole
EP0778929A1 (fr) Raccord de tubes, arme a calibres variables
US6028269A (en) Set of hollow and tapered composite insulators with a one piece core
CN108258412A (zh) 一种共型雷达天线罩及缠绕成型方法
EP1724793A2 (fr) Procédé et dispositif de fabrication d'une bobine d'arrêt et bobine d'arrêt
JP2915344B2 (ja) 絶縁電力ケーブルの接続部の絶縁シートおよびその巻き付け方法
JPH07284218A (ja) 電力ケーブルシース接続部
JPH0751639B2 (ja) 紐状又は棒状プリプレグ中空体
JPS58158609A (ja) 光フアイバケ−ブル防水成端部
EP0978367A3 (fr) Profilé en fibres de carbone ayant une rigidité élevée utilisé dans la construction de véhicules rapides et son procédé de fabrication
JPS5928576Y2 (ja) コロナ放電防止用電気絶縁管

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980928

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ABB AB

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020121

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAU Approval following communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOSNAGR4

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69733474

Country of ref document: DE

Date of ref document: 20050714

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060309

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: ISLER & PEDRAZZINI AG;POSTFACH 1772;8027 ZUERICH (CH)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20110412

Year of fee payment: 15

Ref country code: DE

Payment date: 20110420

Year of fee payment: 15

Ref country code: FR

Payment date: 20110426

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20110420

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20110421

Year of fee payment: 15

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120422

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20121228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120422

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69733474

Country of ref document: DE

Effective date: 20121101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121101