US3584131A - Capacitive-insulating and connector assembly for transformers and the like - Google Patents

Capacitive-insulating and connector assembly for transformers and the like Download PDF

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Publication number
US3584131A
US3584131A US850966A US3584131DA US3584131A US 3584131 A US3584131 A US 3584131A US 850966 A US850966 A US 850966A US 3584131D A US3584131D A US 3584131DA US 3584131 A US3584131 A US 3584131A
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United States
Prior art keywords
assembly
conductors
insulating
tapered
conductor
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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
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US850966A
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English (en)
Inventor
Karl Allmendinger
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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Publication date
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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
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/28—Capacitor type

Definitions

  • Cl H0lb 17/28 the conductors predominately in radial direction but, as well, Field of Search 174/19, 31, partially in axial direction.
  • the outer insulator controls the 73, 142, 143; 336/69, 70 potential both radially and axially.
  • the present invention solves the above problem by providing concentric capacitive-insulating members having anintermediate conductive layer therebetween and with the inner insulation member being adapted to surround the other conductor so that the full potential difference between the conductors or windings of the transformer is controlled to flow through the inner member in radial as well as axial direction and such that the interior surface of the inner member and the external surface of the outer member are established with the same potentialin the region where the members are of the largest diameter.
  • the above assembly is disposed within a ceramic insulator bushing which may be filled with liquid insulating material or it may be enclosed within a bushing of wound fibrous insulating material which is saturated with a suitable synthetic resinous material.
  • FIGURE of the drawing is a longitudinal section showing one half of an assembly according to the present invention.
  • an elongated cylindrical body 1 of insulating material having opposite end portions provided with tapered outer surfaces as indicated by the reference characters 6 and 7.
  • the body may be wound of concentric layers of insulating material and in the opposite end portions thereof the concentric windings are provided with layers of conducting material 8 which extend for predetermined axial lengths as shown.
  • the lower tapered end 7 of the body is tapered at an angle to space the exposed end edges of the conductive layers 8 in accord with the characteristics of the transformer oil whereas the opposite end 6 is tapered in accordance with the characteristics of air.
  • the intermediate portion of t the body 1 between the conducting layers 8 is constructed such that its opposite ends whereat the layers 8 begin are sloped as shown, the lower end being at substantially the same angle of slope as the lower end 7.
  • the opposite ends 6 and 7 of the body 1 may be sloped oppositely as indicated by the dashed lines depending on the form of construction employed for the active portions to be connected.
  • the body 1 is surrounded by a layer 3 of electrically con ducting material which may be in the form of metal foil windings, a copper tube or the like and directly upon this electrically conducting layer 3 is the outer capacitive insulating portion 2 which is formed of concentrically wound layers of insulating material covered with electrical-conducting layers 9 and with the lower end 11 of the body 2 being tapered to expose the end edges of the layers 9 according to the characteristics of the oil in the transformer tank and with the upper end 10 tapered to provide spacing between the exposed edges of the layers 9 according to the characteristics of air.
  • the entire assembly is disposed within the ceramic bushing 12 which projects through the transformer tank cover T so that the tapered portions of the insulating bodies are above and below same.
  • the bushing 12 may be formed ofa suitable wound fibrous insulating material which is saturated with a synthetic resinous material which is subsequently set and cured.
  • the inner body 1 is adapted to surround an electrical conductor C connected to the low potential winding of the transformer and the electrically conductive layer 3 is adapted to be connected to the high potential winding. Because the intermediate portion of the body 1 is largely devoid of the electrically conducting layers 8, the potential difference between the low potential P and the high potential P is largely controlled across this intermediate portion of the body in a radial direction whereas in the opposite end portions thereof, the full potential is controlled both in radial and axial directions.
  • the potential between the high-tension potential P and the tank cover which is substantially at ground potential is controlled across the outer body 2 both in axial and radial directions such that the potential at the outer surface 5 of the outer body 2 is at the same potential as is the inner surface 4 of the inner body 2. Thus, the entire potential difference is controlled twice in a radial direction and four times in an axial direction so as to allow for a more compact and efficient connection.
  • the potential I is the higher and the potential P is the lower whereas it will be understood that it is possible to select the opposite relationship in which case the bodies 1 and 2 should be arranged in the reverse order from that shown in the drawing.
  • the present invention makes it possible to provide considerable saving in space so that only one instead of two separate leads are needed and such that the empty filler spaces which result when two leads are disposed adjacent each other in a common ceramic insulator are avoided. Additionally, substantial savings in manufacturing cost result in that the device is provided by a single integrally wound construction.
  • An insulating-connector assembly comprising, in combination:
  • tubular inner insulator adapted to surround a first conductor
  • one of said insulators including means for controlling the electrical potential difference between the two conduc- 2.
  • a capacitive-insulating and connector assembly adapted to extend through an insulating bushing leading from the interior to the exterior of a housing containing as electrical device having first and second conductors disposed respectively at low and high electrical potentials, comprising in combination:
  • a cylindrical body of insulating material for surrounding one of said conductors, said body having at least one end portion provided with concentrically wound layers of electrically conductive material leaving an intermediate portion of said body in the absence of such conductive material;
  • an electrically conductive layer surrounding said body and adapted to be connected to the other of said conductors whereby the full potential difference between said conductors is controlled radially through said intermediate portion of said body and both axially and radially through said one end portion of the body;
  • a second cylindrical body surrounding said conductive layer, said second cylindrical body being provided throughout its length with concentrically wound layers of electrically conductive material whereby said full potential difference is controlled both radially and axially through said second cylindrical body.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
US850966A 1968-08-16 1969-08-18 Capacitive-insulating and connector assembly for transformers and the like Expired - Lifetime US3584131A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1237868A CH477748A (de) 1968-08-16 1968-08-16 Kondensatordurchführung

Publications (1)

Publication Number Publication Date
US3584131A true US3584131A (en) 1971-06-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US850966A Expired - Lifetime US3584131A (en) 1968-08-16 1969-08-18 Capacitive-insulating and connector assembly for transformers and the like

Country Status (4)

Country Link
US (1) US3584131A (de)
CH (1) CH477748A (de)
DE (1) DE1804113C3 (de)
SE (1) SE344517B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659033A (en) * 1970-10-28 1972-04-25 Westinghouse Electric Corp Electrical bushing having adjacent capacitor sections separated by axially continuous conductive layers, and including a cooling duct
US4227035A (en) * 1978-05-15 1980-10-07 Westinghouse Electric Corp. Modular condenser bushing
US20190252871A1 (en) * 2015-11-27 2019-08-15 Siemens Aktiengesellschaft High-Voltage Device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1129467A (en) * 1911-08-07 1915-02-23 Westinghouse Electric & Mfg Co Terminal for electrical apparatus.
US1969917A (en) * 1931-01-05 1934-08-14 Micafil Ag High tension sleeve insulator
US2322214A (en) * 1938-06-14 1943-06-22 Reyrolle A & Co Ltd Electrically insulating bodies
US3462545A (en) * 1967-01-13 1969-08-19 Westinghouse Electric Corp Condenser bushing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1129467A (en) * 1911-08-07 1915-02-23 Westinghouse Electric & Mfg Co Terminal for electrical apparatus.
US1969917A (en) * 1931-01-05 1934-08-14 Micafil Ag High tension sleeve insulator
US2322214A (en) * 1938-06-14 1943-06-22 Reyrolle A & Co Ltd Electrically insulating bodies
US3462545A (en) * 1967-01-13 1969-08-19 Westinghouse Electric Corp Condenser bushing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3659033A (en) * 1970-10-28 1972-04-25 Westinghouse Electric Corp Electrical bushing having adjacent capacitor sections separated by axially continuous conductive layers, and including a cooling duct
US4227035A (en) * 1978-05-15 1980-10-07 Westinghouse Electric Corp. Modular condenser bushing
US20190252871A1 (en) * 2015-11-27 2019-08-15 Siemens Aktiengesellschaft High-Voltage Device

Also Published As

Publication number Publication date
DE1804113B2 (de) 1972-08-17
CH477748A (de) 1969-08-31
SE344517B (de) 1972-04-17
DE1804113C3 (de) 1975-04-17
DE1804113A1 (de) 1970-03-05

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