EP0680658B1 - Electric bushing with voltage tap - Google Patents

Electric bushing with voltage tap Download PDF

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Publication number
EP0680658B1
EP0680658B1 EP94904134A EP94904134A EP0680658B1 EP 0680658 B1 EP0680658 B1 EP 0680658B1 EP 94904134 A EP94904134 A EP 94904134A EP 94904134 A EP94904134 A EP 94904134A EP 0680658 B1 EP0680658 B1 EP 0680658B1
Authority
EP
European Patent Office
Prior art keywords
bushing
supporting feet
insulating
insulating body
pct
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
EP94904134A
Other languages
German (de)
French (fr)
Other versions
EP0680658A1 (en
Inventor
Friedrich Schweppe
Helmut Späck
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.)
Siemens AG
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Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0680658A1 publication Critical patent/EP0680658A1/en
Application granted granted Critical
Publication of EP0680658B1 publication Critical patent/EP0680658B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01B17/005—Insulators structurally associated with built-in electrical equipment
    • 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
    • H01B17/28—Capacitor type

Definitions

  • the invention relates to an electrical feedthrough with a feedthrough conductor and an insulating body surrounding the feedthrough conductor, with a fastening flange anchored in the insulating body, on the inner circumference of which a shielding body controlling the electric field is arranged, and with a capacitive voltage tap provided for the operation of a display device , consisting of a tapping electrode concentrically surrounding the lead-through conductor inside the insulating body and a connecting element connected to it and accessible on the outside of the insulating body.
  • the field-controlling shielding body which has a sleeve-shaped section, is designed here as a one-piece molded body made of a rubber-elastic, electrically conductive material. It is cast in the insulating body and is concentric with the feed-through conductor.
  • the tap electrode consists of a metallic ring, for example made of wire, connected to a support device which is centered by the sleeve-shaped section of the shielding body.
  • a plurality of support members emanate from the ring and lie against the outer jacket of the sleeve-shaped section of the shielding body with the interposition of electrical insulation.
  • the entire support device is fixed coaxially to the feed-through conductor on the shielding body.
  • the insulation consisting of strips of film is glued to the support members.
  • the connecting element which is designed, for example, as a contact tab, is fastened to one of the support members.
  • the invention is therefore based on the object of improving and simplifying the electrical feedthrough with regard to its tap electrode.
  • the tap electrode is designed as an insulating ring body provided with an outer conductive layer, which has at least three support feet which extend over the shielding body, one of which supports the connecting element connected to the conductive layer.
  • FIG. 1 shows an electrical feedthrough which is constructed from an insulating body, one from the insulating body 3 surrounded leadthrough conductor 2, a mounting flange 4, a field-controlling shielding body 5 and a capacitively coupled tap electrode for operating a voltage display device.
  • the structure and the arrangement of the shielding body 4 and the fastening flange 5 in the bushing 1 are unchanged from the prior art mentioned at the beginning, on which the invention is based.
  • the tap electrode is designed as an annular body 6 (see FIG. 2) made of plastic, which is connected to a conductive layer 7, e.g. a conductive lacquer, is provided and has at least three support feet 8 which extend over the shielding body 5.
  • the one support leg 8 carries a connection element 10, which is accessible on the outside 9 of the insulating body 3, e.g. a contact flag for coupling the voltage display device.
  • the support feet 8 are adapted in terms of cross-section and inclination to the longitudinal axis of the bushing 1 to the annular shielding body 5 such that, in the assembled state, a clamping fit of the ring body 6 on the shielding body 5 results before the insulating body 3 is potted.
  • the support feet 8 are provided according to FIG 2 with a circumferentially arranged collar 13. On the inside, the support feet have two sharp-edged or pointed projections 12 for anchoring in the shielding body 5 (see FIG. 3). Both Measures are used to securely anchor the tap electrode 6, 7, 8 in the insulating body 3.

Abstract

PCT No. PCT/DE94/00035 Sec. 371 Date Jul. 21, 1995 Sec. 102(e) Date Jul. 21, 1995 PCT Filed Jan. 14, 1994 PCT Pub. No. WO94/17535 PCT Pub. Date Aug. 4, 1994An electric bushing is provided with a capacitive voltage-tapping electrode having a simplified design as an insulating ring-shaped plastic body. The plastic body is coated with conductive lacquer and has supporting feet which engage on a shielding body belonging to the bushing. One of the supporting feet bears a connecting element linked to the conductive layer.

Description

Die Erfindung bezieht sich auf eine elektrische Durchführung mit einem Durchführungsleiter und einem den Durchführungsleiter umgebenden Isolierkörper, mit einem in dem Isolierkörper verankerten Befestigungsflansch, an dessen innerem Umfang ein das elektrische Feld steuernder Abschirmkörper angeordnet ist, sowie mit einem für den Betrieb einer Anzeigevorrichtung vorgesehenen kapazitiven Spannungsabgriff, bestehend aus einer den Durchführungsleiter innerhalb des Isolierkörpers konzentrisch umgebenden Abgriffelektrode und einem mit dieser verbundenen, an der Außenseite des Isolierkörpers zugänglichen Anschlußelement.The invention relates to an electrical feedthrough with a feedthrough conductor and an insulating body surrounding the feedthrough conductor, with a fastening flange anchored in the insulating body, on the inner circumference of which a shielding body controlling the electric field is arranged, and with a capacitive voltage tap provided for the operation of a display device , consisting of a tapping electrode concentrically surrounding the lead-through conductor inside the insulating body and a connecting element connected to it and accessible on the outside of the insulating body.

Eine derartige elektrische Durchführung ist im deutschen Gebrauchsmuster GM 87 04 976 beschrieben. Der feldsteuernde, einen hülsenförmigen Abschnitt aufweisende Abschirmkörper ist hier als einstückiger Formkörper aus einem gummielastischen, elektrisch leitfähigem Material ausgeführt. Er ist in dem Isolierkörper eingegossen und liegt konzentrisch zum Durchführungsleiter. Die Abgriffelektrode besteht aus einem metallischem Ring, z.B. aus Draht verbunden mit einer Stützeinrichtung, die von dem hülsenförmigen Abschnitt des Abschirmkörpers zentriert ist. Von dem Ring gehen mehrere, z.B. aus Blechstreifen gebildete Stützglieder aus, die unter Zwischenlage einer elektrischen Isolation am Außenmantel des hülsenförmigen Abschnitts des Abschirmkörpers anliegen. Hierdurch ist die gesamte Stützeinrichtung koaxial zum Durchführungsleiter auf dem Abschirmkörper festgelegt. Die aus Folienstreifen bestehende Isolation ist an die Stützglieder angeklebt. An einem der Stützglieder ist das z.B. als Kontaktfahne ausgeführte Anschlußelement befestigt. Die Herstellung der beschriebenen Abgriffelektrode als Metall-Lötbaugruppe ist relativ aufwendig und kostenbelastend.Such an electrical implementation is described in German utility model GM 87 04 976. The field-controlling shielding body, which has a sleeve-shaped section, is designed here as a one-piece molded body made of a rubber-elastic, electrically conductive material. It is cast in the insulating body and is concentric with the feed-through conductor. The tap electrode consists of a metallic ring, for example made of wire, connected to a support device which is centered by the sleeve-shaped section of the shielding body. A plurality of support members, for example formed from sheet metal strips, emanate from the ring and lie against the outer jacket of the sleeve-shaped section of the shielding body with the interposition of electrical insulation. As a result, the entire support device is fixed coaxially to the feed-through conductor on the shielding body. The insulation consisting of strips of film is glued to the support members. The connecting element, which is designed, for example, as a contact tab, is fastened to one of the support members. The manufacture of the described tap electrode as a metal soldering assembly is relatively complex and costly.

Daher wird der Erfindung die Aufgabe zugrundegelegt, die elektrische Durchführung bezüglich ihrer Abgriffelektrode zu verbessern und zu vereinfachen.The invention is therefore based on the object of improving and simplifying the electrical feedthrough with regard to its tap electrode.

Diese Aufgabe wird gelöst, wenn die Abgriffelektrode als ein mit einer äußeren leitenden Schicht versehener isolierender Ringkörper ausgebildet ist, der wenigstens drei über den Abschirmkörper greifende Stützfüße besitzt, von denen der eine Stützfuß das mit der leitenden Schicht verbundene Anschlußelement trägt.This object is achieved if the tap electrode is designed as an insulating ring body provided with an outer conductive layer, which has at least three support feet which extend over the shielding body, one of which supports the connecting element connected to the conductive layer.

Zweckmäßige Aus- und Weiterbildungen des Erfindungsgegenstandes, die besonders die Halterung und Verankerung der Abgriffelektrode betreffen, sind in den Ansprüchen 1 bis 5 angegeben.Expedient training and further developments of the subject matter of the invention, which relate in particular to the mounting and anchoring of the tap electrode, are specified in claims 1 to 5.

Ein Ausführungsbeispiel wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigen:

FIG 1
einen Aufriß einer elektrischen Durchführung mit eingegossener Elektrode für ein kapazitiv gekoppeltes Spannungsanzeige-System,
FIG 2
eine als Ringkörper ausgeführte Abgriffelektrode in Draufsicht,
FIG 3
den Ringkörper nach FIG 2 als Schnittdarstellung gemäß der Schnittlinie A-B
FIG 4
einen Schnitt IV-IV nach FIG 3.
An exemplary embodiment is explained in more detail below with reference to a drawing. Show it:
FIG. 1
an elevation of an electrical feedthrough with cast-in electrode for a capacitively coupled voltage display system,
FIG 2
a tap electrode designed as a ring body in plan view,
FIG 3
the ring body of Figure 2 as a sectional view along the section line AB
FIG 4
a section IV-IV of FIG 3.

In FIG 1 ist eine elektrische Durchführung dargestellt, die aufgebaut ist aus einem Isolierkörper, einem vom Isolierkörper 3 umgebenen Durchführungsleiter 2, einem Befestigungsflansch 4, einem feldsteuernden Abschirmkörper 5 sowie einer kapazitiv gekoppelten Abgriffelektrode zum Betrieb einer Spannungsanzeige-Vorrichtung.
Der Abschirmkörper 4 und der Befestigungsflansch 5 sind in ihrem Aufbau und in ihrer Anordnung in der Durchführung 1 unverändert gegenüber dem eingangs erwähnten, der Erfindung zugrundegelegten Stand der Technik.1 shows an electrical feedthrough which is constructed from an insulating body, one from the insulating body 3 surrounded leadthrough conductor 2, a mounting flange 4, a field-controlling shielding body 5 and a capacitively coupled tap electrode for operating a voltage display device.
The structure and the arrangement of the shielding body 4 and the fastening flange 5 in the bushing 1 are unchanged from the prior art mentioned at the beginning, on which the invention is based.

Die Abgriffelektrode ist als ein Ringkörper 6 (siehe FIG 2) aus Kunststoff ausgebildet, der mit einer leitenden Schicht 7, z.B. einem Leitlack, versehen ist und wenigstens drei über den Abschirmkörper 5 greifende Stützfüße 8 aufweist. Der eine Stützfuß 8 trägt ein an der Außenseite 9 des Isolierkörpers 3 zugängliches Anschlußelement 10, z.B. eine Kontaktfahne zur Ankopplung der Spannungsanzeige-Vorrichtung.The tap electrode is designed as an annular body 6 (see FIG. 2) made of plastic, which is connected to a conductive layer 7, e.g. a conductive lacquer, is provided and has at least three support feet 8 which extend over the shielding body 5. The one support leg 8 carries a connection element 10, which is accessible on the outside 9 of the insulating body 3, e.g. a contact flag for coupling the voltage display device.

Die Stützfüße 8 sind hinsichtlich Querschnitt und Neigung zur Längsachse der Durchführung 1 an den ringförmigen Abschirmkörper 5 derart angepaßt, daß sich im zusammengefügten Zustand vor dem Verguß des Isolierkörpers 3 ein Klemmsitz des Ringkörpers 6 an dem Abschirmkörper 5 ergibt.The support feet 8 are adapted in terms of cross-section and inclination to the longitudinal axis of the bushing 1 to the annular shielding body 5 such that, in the assembled state, a clamping fit of the ring body 6 on the shielding body 5 results before the insulating body 3 is potted.

Vom Ringkörper 6 gehen sich etwa radial nach außen erstreckende Haltearme 14 ab, denen sich die Stützfüße 8 anschließen, so daß diese auf einem gegenüber dem Ringkörper 8 größeren Radius angeordnet sind.From the ring body 6 extend approximately radially outwardly extending holding arms 14, which are followed by the support feet 8, so that these are arranged on a larger radius than the ring body 8.

Die Stützfüße 8 sind gemäß FIG 2 mit einem umlaufend angeordneten Kragen 13 versehen. An ihrer Innenseite haben die Stützfüße zwei scharfkantige bzw. spitze Vorsprünge 12 zur Verankerung im Abschirmkörper 5 (siehe FIG 3). Beide Maßnahmen dienen zur sicheren Verankerung der Abgriffelektrode 6,7,8 im Isolierkörper 3.The support feet 8 are provided according to FIG 2 with a circumferentially arranged collar 13. On the inside, the support feet have two sharp-edged or pointed projections 12 for anchoring in the shielding body 5 (see FIG. 3). Both Measures are used to securely anchor the tap electrode 6, 7, 8 in the insulating body 3.

Claims (5)

  1. Electric bushing (1) having a bushing conductor (2) and an insulating body (3) surrounding the bushing conductor (2), having a mounting flange (4) which is anchored in the insulating body (3) and on whose interior circumference a screening body (5) controlling the electric field is arranged, and having a capacitive voltage tap which is provided for operating a display device and comprises a tapping electrode (6, 7, 8) concentrically surrounding the bushing conductor (2) inside the insulating body (3), and a connection element (10) which is connected to said tapping electrode and is accessible on the outside (9) of the insulating body (3), characterized in that the tapping electrode is constructed as an insulating annular body (6) which is provided with an outer conductive layer (7) and which has at least three supporting feet (8), which grip over the screening body (5), of which one supporting foot (8) carries the connection element (10) connected to the conductive layer (7).
  2. Bushing according to Claim 1, characterized in that the cross-section of the supporting feet (8) and the inclination of the supporting feet (8) to the longitudinal axis of the bushing are adapted to the screening body (5) in such a way that it is possible to achieve a clamping seat of the annular body (6) on the screening body (5).
  3. Bushing according to Claim 1 or 2, characterized in that the supporting feet (8) are provided on their inside (11) with at least one sharp-edged or pointed projection (12).
  4. Bushing according to one of the preceding claims, characterized in that the supporting feet (8) are provided with a circumferentially arranged collar (13).
  5. Bushing according to one of the preceding claims, characterized in that the supporting feet (8) are arranged on a radius which is larger by comparison with the annular body (6), and in that single-piece retaining arms (14) extending approximately radially are provided.
EP94904134A 1993-01-21 1994-01-14 Electric bushing with voltage tap Expired - Lifetime EP0680658B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9300777U 1993-01-21
DE19939300777 DE9300777U1 (en) 1993-01-21 1993-01-21 Electrical feedthrough with voltage tap
PCT/DE1994/000035 WO1994017535A1 (en) 1993-01-21 1994-01-14 Electric bushing with voltage tap

Publications (2)

Publication Number Publication Date
EP0680658A1 EP0680658A1 (en) 1995-11-08
EP0680658B1 true EP0680658B1 (en) 1997-04-09

Family

ID=6888391

Family Applications (1)

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EP94904134A Expired - Lifetime EP0680658B1 (en) 1993-01-21 1994-01-14 Electric bushing with voltage tap

Country Status (9)

Country Link
US (1) US5726390A (en)
EP (1) EP0680658B1 (en)
JP (1) JP3459254B2 (en)
AT (1) ATE151561T1 (en)
DE (2) DE9300777U1 (en)
FI (1) FI953509A (en)
NO (1) NO319245B1 (en)
RU (1) RU2114475C1 (en)
WO (1) WO1994017535A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102203A1 (en) * 2012-12-27 2014-07-03 Siemens Aktiengesellschaft Insulating sleeve and hoop

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
ES2189333T3 (en) 1994-12-22 2003-07-01 Steag Hamatech Ag DEVICE FOR Lacquering Or Coating A SUBSTRATE.
DE19701828A1 (en) * 1997-01-21 1998-07-23 Abb Research Ltd Transmission tower with insulated mast head
FR2815762A1 (en) * 2000-10-25 2002-04-26 Schneider Electric Sa High tension bushing with gas insulation has dielectric screen embedded in elastomer covering
FR2830977B1 (en) * 2001-10-12 2005-01-14 Transfix Toulon Soc Nouv ELECTRICAL CONVERTER FOR MEDIUM VOLTAGE CUTTING APPARATUS INCORPORATING A DEVICE FOR MEASURING CURRENT AND VOLTAGE
FR2837615B1 (en) * 2002-03-21 2004-05-28 Alstom DEVICE FOR CONTROLLING A HIGH ELECTRIC FIELD IN AN INSULATING SYNTHETIC MATERIAL, COMPRISING AT LEAST ONE RIGID ELECTRODE
DE10220478A1 (en) * 2002-05-07 2003-11-27 Framatome Anp Gmbh Electrical implementation and use of the electrical implementation
DE102004035176B4 (en) * 2004-07-16 2014-09-25 Siemens Aktiengesellschaft Coupling electrode for capacitive voltage tap within an insulating body of a bushing or a supporter and component with a coupling electrode
DE102005059754B4 (en) * 2005-12-09 2010-05-27 Siemens Ag Injection molded outer cone bushing
CN101136282A (en) * 2006-08-31 2008-03-05 Abb研究有限公司 High voltage shield
FR2923954B1 (en) * 2007-11-20 2010-02-26 Schneider Electric Ind Sas BLIND CONNECTION OF TWO TERMINALS BY CONTACT BETWEEN PLANAR INTERFACES.
EP2264719B1 (en) * 2009-06-18 2014-04-02 ABB Technology Ltd High voltage device
US11651875B2 (en) * 2019-06-03 2023-05-16 Hubbell Incorporated Electrical bushings having molded in screens and methods of making

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US3600502A (en) * 1969-11-26 1971-08-17 Westinghouse Electric Corp Electrical condenser bushing having a plurality of cylindrical, interleaved, ground and tap layers
FR2487109A1 (en) * 1980-06-20 1982-01-22 Avocat Jean IMPROVEMENTS IN MEDIUM VOLTAGE CAPACITIVE VOLTAGE DIVIDERS
US4584429A (en) * 1983-03-21 1986-04-22 Cooper Industries, Inc. Electrical assembly including a metal enclosure and a high voltage bushing
DE8704976U1 (en) * 1987-04-03 1987-06-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
DE3917862A1 (en) * 1989-06-01 1990-12-06 Asea Brown Boveri ARRANGEMENT FOR THE POWER SUPPLY OF A DISPLAY DEVICE FOR THE DISPLAY OF A SUPPLYING VOLTAGE VOLTAGE IN A MEDIUM VOLTAGE SWITCHGEAR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102203A1 (en) * 2012-12-27 2014-07-03 Siemens Aktiengesellschaft Insulating sleeve and hoop

Also Published As

Publication number Publication date
NO952836D0 (en) 1995-07-17
ATE151561T1 (en) 1997-04-15
JPH08510587A (en) 1996-11-05
DE9300777U1 (en) 1994-05-19
EP0680658A1 (en) 1995-11-08
JP3459254B2 (en) 2003-10-20
WO1994017535A1 (en) 1994-08-04
NO319245B1 (en) 2005-07-04
US5726390A (en) 1998-03-10
RU2114475C1 (en) 1998-06-27
NO952836L (en) 1995-07-17
DE59402380D1 (en) 1997-05-15
FI953509A0 (en) 1995-07-20
FI953509A (en) 1995-07-20

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