EP1045404A1 - Isolierende Durchführung für elektrischen Mittel- oder Hochspannungsapparat, insbesonder für Transformator - Google Patents

Isolierende Durchführung für elektrischen Mittel- oder Hochspannungsapparat, insbesonder für Transformator Download PDF

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Publication number
EP1045404A1
EP1045404A1 EP00400951A EP00400951A EP1045404A1 EP 1045404 A1 EP1045404 A1 EP 1045404A1 EP 00400951 A EP00400951 A EP 00400951A EP 00400951 A EP00400951 A EP 00400951A EP 1045404 A1 EP1045404 A1 EP 1045404A1
Authority
EP
European Patent Office
Prior art keywords
tube
metal
end piece
cavity
seal
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.)
Granted
Application number
EP00400951A
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English (en)
French (fr)
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EP1045404B1 (de
Inventor
Laurent Gaillard
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.)
Manufacture dAppareillage Electrique de Cahors SA
Original Assignee
Manufacture dAppareillage Electrique de Cahors SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9544280&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1045404(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Manufacture dAppareillage Electrique de Cahors SA filed Critical Manufacture dAppareillage Electrique de Cahors SA
Publication of EP1045404A1 publication Critical patent/EP1045404A1/de
Application granted granted Critical
Publication of EP1045404B1 publication Critical patent/EP1045404B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing

Definitions

  • the present invention relates to a crossing or insulating column for medium electrical appliance or high voltage, especially for transformers medium voltage.
  • Such insulating bushings include, in known manner, a tube of insulating material such as a epoxy resin filled with glass fibers, intended for surround an electrical conductor.
  • One end of the tube is surrounded by a metal tip, for example aluminum, intended for be attached to the electrical appliance.
  • a metal tip for example aluminum
  • the other end of the tube carries an element metallic generally aluminum shaped crown, intended to be connected with a conductor electric outdoor.
  • the outer surface of the tube between the metal tip and the metal element is covered by an elastomer coating, for example made of EPDM which protects the tube from stresses linked to the environment and guarantees a path distance sufficient to provide electrical insulation desired.
  • an elastomer coating for example made of EPDM which protects the tube from stresses linked to the environment and guarantees a path distance sufficient to provide electrical insulation desired.
  • connection between the insulating tube, the element and the metal end caps are made by gluing. All other assembly methods are hardly thinkable because we cannot accept any deformation of the tube or metal parts above, or presence of rivets or other mechanical systems given the intensity of the electric field in this very space restricted between the attachment piece and the conductor under tension crossing the crossing.
  • the EPDM elastomer coating is produced by injection. Injection pressure and temperature are such (around 500 bars at 170 ° C) that it is practically impossible to guarantee that the bonding of the attachment piece will not be degraded during this product manufacturing stage, due to the deformation of materials and coefficients of different dilation of these.
  • the purpose of the present invention is to create a insulating bushing of the above type in which the bonding of the attachment piece to the tube is ensured in optimal conditions.
  • this insulating crossing is characterized in that the inner surface of the metal tip has an annular cavity open towards the surface of the tube and extending over the most of the length of the tip, this cavity annular communicating with the outside by a channel and being filled with an adhesive material injected into the cavity through said channel.
  • the adhesive material filling the cavity ensures thus excellent fixing by gluing the end piece metallic.
  • bonding is limited to the area of the cavity, this bonding can be carried out after risk-free application of the elastomer coating presence of elastomer in the bonding area.
  • the cavity is limited on each side by a protuberance annular in contact with the outer surface of the tube.
  • the protuberance adjacent to the elastomer coating has a groove in which is housed a contact seal with the surface of the tube.
  • This joint forms a tight barrier which prevents any risk of elastomer penetration into the bonding of the nozzle to the tube.
  • the insulating bushing for medium electrical appliance or high voltage in particular for transformer, comprises a tube 1 made of insulating material, for example epoxy resin loaded with fibers, and intended to surround a electrical conductor.
  • One end of the tube is surrounded by a metal tip 2, for example aluminum intended for be attached to the electrical appliance, for example on the cover of a transformer.
  • a metal tip 2 for example aluminum intended for be attached to the electrical appliance, for example on the cover of a transformer.
  • the other end of the tube 1 carries an element metallic 3 for example aluminum intended to be connected with an external electrical conductor.
  • the outer surface 1a of the tube 1 included between the metal end piece 2 and the metal element 3 is covered by an elastomer coating 4 by example in EPDM.
  • the inner surface of the metal end piece 2 has a annular cavity 5 open to the surface 1a of the tube 1 and spanning most of the length of the end piece 2.
  • This annular cavity 5 communicates with the outside by a channel 6 and is filled by a adhesive material 7 for example an injected epoxy resin into cavity 5 through channel 6.
  • the protuberance 9 adjacent to the elastomer coating 4 has a groove 10 in which is housed an O-ring seal 11 in contact with the surface 1a of the tube 1.
  • Figure 3 shows on the other hand that the groove 10 is open towards the elastomer coating 4 and the seal 11 is in contact with the elastomer.
  • the depth d of the cavity 5 (see Figure 3) is between 0.2 and 0.5 mm.
  • This procedure avoids any risk of penetration of the coating elastomer 4 in the bonding area of the nozzle 2.
  • the nozzle 2 is perfectly bonded to the surface of tube 1, without risk of deformation of the tube 1 and of the nozzle 2 and without have to use screws or rivets that would seriously compromise electrical insulation.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Insulating Of Coils (AREA)
EP00400951A 1999-04-12 2000-04-06 Isolierende Durchführung für elektrischen Mittel- oder- Hochspannungsapparat, insbesondere für einen Transformator, und Herstellungsprozess derselben Expired - Lifetime EP1045404B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9904533A FR2792106B1 (fr) 1999-04-12 1999-04-12 Traversee isolante pour appareil electrique moyenne ou haute tension, en particulier pour transformateur
FR9904533 1999-04-12

Publications (2)

Publication Number Publication Date
EP1045404A1 true EP1045404A1 (de) 2000-10-18
EP1045404B1 EP1045404B1 (de) 2004-09-15

Family

ID=9544280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00400951A Expired - Lifetime EP1045404B1 (de) 1999-04-12 2000-04-06 Isolierende Durchführung für elektrischen Mittel- oder- Hochspannungsapparat, insbesondere für einen Transformator, und Herstellungsprozess derselben

Country Status (4)

Country Link
EP (1) EP1045404B1 (de)
AT (1) ATE276576T1 (de)
DE (1) DE60013676D1 (de)
FR (1) FR2792106B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1480232A1 (de) * 2003-05-22 2004-11-24 Maclean Power France Verbundisolator-Herstellungsverfahren.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0709862A1 (de) * 1994-10-28 1996-05-01 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Verfahren zur Befestigung einer Verbundplatte mit einer Metallarmatur zur Herstellung eines elektrischen Isolators
DE19649414A1 (de) * 1995-11-30 1997-06-05 Ngk Insulators Ltd Verfahren zum Verbinden eines Kernzylinders und eines mit einem Flansch versehenen metallischen Paßelements eines hohlen Verbundisolators durch Preßpassen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0709862A1 (de) * 1994-10-28 1996-05-01 Sediver, Societe Europeenne D'isolateurs En Verre Et Composite Verfahren zur Befestigung einer Verbundplatte mit einer Metallarmatur zur Herstellung eines elektrischen Isolators
DE19649414A1 (de) * 1995-11-30 1997-06-05 Ngk Insulators Ltd Verfahren zum Verbinden eines Kernzylinders und eines mit einem Flansch versehenen metallischen Paßelements eines hohlen Verbundisolators durch Preßpassen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1480232A1 (de) * 2003-05-22 2004-11-24 Maclean Power France Verbundisolator-Herstellungsverfahren.

Also Published As

Publication number Publication date
DE60013676D1 (de) 2004-10-21
ATE276576T1 (de) 2004-10-15
EP1045404B1 (de) 2004-09-15
FR2792106B1 (fr) 2001-05-11
FR2792106A1 (fr) 2000-10-13

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