EP2442319B1 - Durchführung für Hochspannungsausleitungen in Öltransformatoren - Google Patents

Durchführung für Hochspannungsausleitungen in Öltransformatoren Download PDF

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Publication number
EP2442319B1
EP2442319B1 EP10187700A EP10187700A EP2442319B1 EP 2442319 B1 EP2442319 B1 EP 2442319B1 EP 10187700 A EP10187700 A EP 10187700A EP 10187700 A EP10187700 A EP 10187700A EP 2442319 B1 EP2442319 B1 EP 2442319B1
Authority
EP
European Patent Office
Prior art keywords
conductive element
spherical cap
cap according
insulation
connection device
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.)
Active
Application number
EP10187700A
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German (de)
English (en)
French (fr)
Other versions
EP2442319A1 (de
Inventor
Hartmut Brendel
Matthias Starke
Ralf Büchner
Jelena Braatz
Klaus Herkert
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 Technology AG
Original Assignee
ABB Technology 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 ABB Technology AG filed Critical ABB Technology AG
Priority to EP10187700A priority Critical patent/EP2442319B1/de
Priority to BRPI1106400A priority patent/BRPI1106400A2/pt
Priority to KR1020110105279A priority patent/KR20120039493A/ko
Priority to CN201110335851.8A priority patent/CN102456470B/zh
Priority to US13/273,865 priority patent/US8618427B2/en
Priority to RU2011141753/07A priority patent/RU2011141753A/ru
Publication of EP2442319A1 publication Critical patent/EP2442319A1/de
Application granted granted Critical
Publication of EP2442319B1 publication Critical patent/EP2442319B1/de
Priority to HRP20130187AT priority patent/HRP20130187T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • 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
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings

Definitions

  • the invention relates to a cap for a Hochschreibsaus horr, with a hollow cylindrical arranged around an axis electrically conductive element, which merges at its first axial end in a hemispherical shape, having a through-opening connecting device for electrical and mechanical connection of the element with an electric shield tube, with at least two spaced apart, each adapted to the shape of the hollow cylindrical element isolation barriers, which envelop this in a respective first and second distance, wherein the isolation barriers each having a pipe neck for performing a shield tube to the connecting device.
  • high-voltage transformers or high-voltage chokes for example, with a rated voltage of 220kV or 380kV on the upper side and> 100MVA nominal power, are usually located in an oil-filled transformer tank for insulation and cooling purposes.
  • An important function in such a transformer has the so-called transformer bushing through which the high voltage potential is brought from the air side to the winding in the transformer tank.
  • the distance from components lying at high voltage potential to the earthed transformer tank - depending on the voltage level - would have to be up to 4 m or more.
  • oil-soaked paper or pulp which is a much higher Field stress as air withstand, the distance can be considerably reduced. If the high-voltage connection is led concentrically through a round opening into the boiler, a distance between the inner conductor and the tank of, for example, 20 cm is sufficient.
  • calottes are used for this purpose in the region of the discharges.
  • These are rotationally symmetrical hollow bodies of a metal, which have at one axial end a hemispherical conclusion with a mostly angled pipe socket for a conductor connection or a conductor bushing and at its other axial end a tapered diameter.
  • these electrically conductive hollow bodies are surrounded by a preferably double-walled barrier system made of an insulating material, which is likewise arranged inside the oil-filled transformer tank.
  • the spacing of the isolation barriers by means of insulating rings, in which spacer blocks are latched.
  • this is cumbersome to produce as well as not optimal in terms of isolation, because selectively sharp-edged components are used within an electrically gradient-insensitive region to be electrically insulated.
  • the use of spacer blocks proves to be disadvantageous, in particular in the hemispherical areas of the barriers, because here there is a particularly high risk that the insulation barrier to be separated rests only on corner points of the spacer blocks.
  • a dome for a high-voltage discharge of the aforementioned type is characterized in that the connecting device has a first part for connection to a shield tube and a second connected to the conductive element part and that a frictionally adjustable connection between the first and second part is provided.
  • tolerances in the arrangement of a screen tube but also manufacturing tolerances of an oil boiler or the calotte itself can be corrected to a certain extent.
  • This circumference is essentially determined by the angular adjustability of the connecting device and is a few °, for example +/- 3 °.
  • the connecting device is to be designed such that a guided through the passage opening conductor is always shielded to the outside, for example by suitable shielding plates, which, if necessary, when adjusting against each other are movable.
  • the non-positively adjustable connection comprises two groups of three mutually offset triangles arranged in parallel aligned screw, wherein the first group is provided to apply a tensile force between the two parts and second group for a compressive force between the two parts.
  • An area in the space is always defined by three points, whereby by the first group of screw connections by their respective length a surface is defined in spatial relation to the first part of the connection device, the first part being in turn intended to be connected to a screen tube ,
  • the second group of screw connections defines by their respective length a surface in spatial relation to the second part of the connection device, the second part in turn being connected to the conductive element.
  • a group of screw is intended to exert a tensile force and the other group to exert a compressive force
  • the two parts of the connecting device can be well adjusted to each other and fix.
  • the screw which are provided for exerting a compressive force
  • each plane is precisely determined by its length, so that a potentially bistable state, as might occur, for example, with four or five screw connections per group, is advantageously avoided.
  • a screw or threaded rod extends through a non-threaded through hole of the first part of the connecting device into a thread in the second part.
  • a screw connection designed for pressing force a screw extends through a matching continuous thread in the first part of the connecting device and then strikes the surface of the second part of the connecting device without a thread or the like being provided there.
  • connection device For the operation of such a connection device, it is irrelevant whether pressure or tensile force connections are arranged in the first or second part or whether it is actually a screw or other length-adjustable component.
  • a threadless through hole through which a threaded screw is inserted and a through hole with thread conceivable through which a screw is inserted, which is in a desired Area has no thread. It is essential here that the connection in a certain area without rotational movement along the screw is displaced.
  • the screw connections of at least one of the groups are arranged at equidistant spacing along a common circular path around the passage opening of the connection device.
  • This offers geometric advantages, since the through-hole then represents a fictitious tilting point of the two connecting device parts to each other and this represents exactly the desired tipping point for a conductor connection of a transformer usually carried out there.
  • all screw connections of the two groups are accessible through the preferably tapered second axial end of the conductive element.
  • the screw with their screw heads are then accessible through the openings provided for the discharge openings in the transformer tank, whereas accessibility from the opposite side is not given.
  • the second part of the connecting device is milled and welded into the conductive element. This allows in a simple manner a modular system, which can be generated with a few basic components or basic shapes a variety of different variants.
  • a torus-like milled electrode with drop-like cross-section widening towards the axial end is welded to the tapering second axial end of the conductive element.
  • this also opens up the advantage of a modular system, on the other hand, contrary to the cited prior art, an improved electrical behavior is achieved because the decisive for a maximum field strength second axial end portion of the dome now has no sharp edges of a bending process.
  • the drop shape is designed such that within the dome no cavities are formed in which could accumulate when filling the respective transformer tank with oil bubbles, which could impair the isolation ability. This depends on the arrangement of the calotte within the transformer tank, which is usually approximately vertical.
  • a suitable drop shape is characterized for example by an angle of about 20 ° to 40 ° of the lower edge of the drop shape to a plane perpendicular to the axis of rotation, which thus allows an inclination of the dome in a range slightly below 20 ° to 40 °.
  • the conductive element, at least part of the connecting device and / or the electrode are made of aluminum.
  • Aluminum offers a number of advantages, such as low weight, ease of processing, good resistance and conductivity.
  • the connecting device is connected in the region of the hemispherical first end of the conductive element with this and that a screen tube through the through hole of the connecting device and through an adjoining in the wall of the conductive element opening in the interior thereof is feasible.
  • This allows a good shielding of an electrical conductor through the shield tube to directly into the interior of the electrically conductive element, in which case can be done without affecting the shield an adjustment of the connecting device.
  • embodiments are also conceivable in which the parts of the connection device overlap in such a way and fulfill an umbrella function that guidance of a screen tube through the connection device is not necessary.
  • a further embodiment of the invention is characterized in that the first of the second isolation barrier is spaced by at least one insulating ring arranged around the axis, which has a radially outlined, preferably flattened, waveform.
  • this offers manufacturing advantages because the elasticity of the insulating ring is achieved by the wave shape.
  • the inner diameter of the elastic insulating ring is adapted to the outer diameter of the first insulation barrier, which is subject to certain fluctuations due to production. Under application a slight force along the axis, it is therefore possible to push such an insulating ring over the cylindrical portion of the first isolation barrier. If the insulation ring has reached the desired position after the sliding process, it clamps there because of its elasticity and further fixing, for example, with an adhesive eliminated in an advantageous manner or is reduced to a few points.
  • these elasticity-related advantages also become apparent when the second insulation barrier is pushed over the insulation rings clamped on the first insulation barrier.
  • a typical diameter of such an insulating ring is, for example, 30 cm to 40 cm, wherein, if necessary, any such 10 to 25 cm axial length, such an insulating ring can be provided.
  • the radial thickness of such an isolation ring can be a few centimeters.
  • the wavy shape of the insulation ring avoids sharp-edged areas.
  • the radial, ie the shortest, insulating path always has a share through the material of the insulation ring, such as pressboard, and a share by oil, with the interior of the dome in the operating state is filled, which has a positive effect on the insulation capacity.
  • the electric field is displaced by the higher permittivity of the same in the adjacent, electrically not so solid oil routes, which are thus electrically charged higher.
  • the waveform increases the creepage distance and thus also increases the isolation capability of the overall arrangement.
  • the insulation gap extending purely through the material of the insulation ring always has a tangential transverse component and is therefore longer than the purely radial component. Due to the flattened waveform, which in each case follows the circular structure of the ring, in addition to the flattening a punctual mechanical contact between the insulating ring and each adjacent isolation barrier is avoided but rather replaced by a flat contact. Due to the flattening of the waveform, the number of radially inward troughs and radially outlying wave crests as well as the number of Cross connections between them reduced. The insulating ability between the first and second barrier is advantageously increased by all the above-mentioned aspects.
  • the insulating ring in the region of the hemispherical shape of the conductive element is adapted radially inward and radially outward to the respective enveloping hemispherical shape of the respective adjacent isolation barriers.
  • a flattened wave crest or a flattened wave trough is also contacted mechanically in the region of the hemispherical shape of the adjacent isolation barriers by the flattened surfaces adapted to spherically matching the isolation barriers and punctiform contacting is avoided.
  • the positioning of the isolation ring in the hemisphere area also proves to be very simple and flexible, because a ring shape in a hemispherical shape of appropriate diameter can be made in any number of angles, so that any positioning tolerances have no negative impact.
  • the conductive element is tapered at its second axial end in the form of a hemisphere section.
  • the insulation barriers surrounding this area at a respective distance accordingly likewise have a hemispherical section-like shape, and the insulation rings with the spherically spherical, flattened wave crests or troughs can also be used there in an advantageous manner.
  • the first insulation barrier is spaced from the electrically conductive element by at least partially flexible insulation strips.
  • These can be designed according to a further embodiment as an angled profile and be provided at least in the flexible portion with a plurality of slots transverse to their respective axial extent.
  • a flexible strip for example with a width in a range of 2cm to 4cm and a thickness in a range of 1cm to 2cm, which for example is made of milled pressboard, for example, can be easily attach as a component along the axial length of the conductive element. Along its circumference are in preferably equidistant distance of for example 60 ° to install several such strips. Usually, however, these strips are not mounted directly on the conductive element, but this is still covered by a layer of insulation material on which the strips are then to be glued, for example.
  • the strips are also Painelbar and to arrange at different angles.
  • the arrangement of the strips approximately parallel to the axis offers the advantage, in particular in combination with the insulating rings to be arranged transversely and transversely thereto, that the mechanical connection behavior between insulating strip and insulating ring is constant along the axis at least in the cylindrical region of the calotte.
  • the design as a slotted strip results on the one hand a high stability in the radial direction and on the other hand still a flexibility, which is needed for example in the hemisphere shape.
  • the sharp-edged areas created by the slots are not detrimental to the insulation capacity insofar as they are arranged next to one another at a small distance of a few millimeters and so nevertheless homogeneity results in the distribution of the electric field.
  • the angled profile of a flexible strip is designed as an X, V and / or Y profile.
  • this brings about the mechanical advantage that such a profile can be placed particularly simply and stably on the conductive element at a cross-sectional end with two support points or support lines.
  • the cross-sectional shape of the strips in their at the radially inner and outer mechanical contact areas or bearing surfaces also follows the circle radius of the conductive element or the insulation barrier.
  • the pipe socket neck of the first and / or second insulation barrier is formed directly on this, so that a seam is avoided.
  • the isolation barriers are usually made with a corresponding metal mold around which, for example, a layer of wet and therefore flexible pulp or pressboard is placed. This is cured together with the metal mold in an oven.
  • the pipe socket is usually arranged angled to the axis in the hemispherical shape, for example at an angle of 0 ° to 30 °, so that it is then necessary to design the mold for the isolation barrier such that a first mold part with cylindrical and hemispherical shape separable is executed by a second mold part with pipe neck.
  • a separation of the two mold parts is namely necessary to be able to remove the metal mold after hardening of the isolation barrier material again from the newly produced molded part. Due to the direct molding of the pipe socket neck, the insulation capacity of the insulation barrier is advantageously improved, because an adhesion of a pipe neck according to the cited prior art is avoided and the wall of the insulation barrier is then homogeneous. In the presence of hemispherical or tapered areas at both axial ends of the conductive element or of the surrounding isolation barriers, these production-related conditions are preferably to be made of two half-shell-like modules, which are then connected together at one axial end.
  • a previously described cap which according to the invention comprises a connecting device with a first part for connecting the same with a screen tube and a second connected to the conductive element part, wherein a frictionally adjustable connection between the first and second part is provided.
  • Fig. 1 shows a section through a first exemplary dome 10.
  • a cylindrical portion 12 of a conductive element of a sheet-like material for example with a wall thickness of 0.8mm and a diameter of 40cm.
  • the axial ends of the cylindrical portion 12 are indicated by the reference numerals 16 and 18.
  • a hemispherical portion 14 of the same sheet-like material joins, in which case cylindrical 12 and hemispherical 14 area were made together from a metal sheet and have no seam.
  • the hemispherical region 14 of the conductive element is provided in an axially outermost region with a circular opening, in which a second part 24 of an approximately rotationally symmetrical adjustable connecting device is welded.
  • the connecting device is aligned on the hemispherical region 14 at an angle of 0 ° to 30 ° to the axis 20, in the Fig. Is shown the Sondefall of 0 °.
  • the second part 24 of the adjustable connecting device has, like the first 22 axially adjacent part on a disc-like hollow cylindrical shape of several millimeters thickness.
  • a shield tube 26 is mounted by means of a screw / clamp connection, which carries the entire weight of the dome.
  • a high voltage conductor 28 is guided in the electrically shielded interior of the calotte.
  • the shield tube 26 or an electrical equivalent is preferably also out into the interior of the dome.
  • the conductive element 12 + 14 is at a distance, for example 1 cm to 2 cm, surrounded by a first insulating barrier 30 + 34 + 38, which consists essentially of a thin, for example 1 mm to 3 mm thick and hardened layer of insulation material made of pulp.
  • a first insulating barrier 30 + 34 + 38 which consists essentially of a thin, for example 1 mm to 3 mm thick and hardened layer of insulation material made of pulp.
  • Such isolation barriers are usually produced in a special process as molded parts.
  • the first isolation barrier 30 + 34 + 38 follows the outer contour of the conductive element 12 + 14 and therefore also has a cylindrical 38 and hemispherical 34 area. It is also provided in the region of the connecting element 22 + 24, a radially aligned pipe socket piece 30 of the first insulation barrier to build around the shield tube 26 around an insulation barrier. The spacing between the conductive element and the first insulation barrier takes place with flexible insulation strips not shown in this figure.
  • a shape-like second isolation barrier 32 + 36 + 40 is arranged at a further distance, which correspondingly again has a hollow-cylindrical 40 and hemispherical 36 area with tube extension connection 32.
  • the first 30 + 34 + 38 isolation barrier is spaced from the second 32 + 36 + 40 by means of isolation rings 42, 44, 46 of pressboard whose radially inner and outer shape in the cylindrical region 38, 40 at the respective radii and in the hemispherical region 34, 36 is adapted to the respective sphere spheres, so as to allow an optimal surface mechanical contact with the adjacent isolation barriers.
  • a waviness of the insulation rings 42, 44, 46, which is assumed to be present, is not indicated in the FIGURE.
  • Fig. 2 shows an exemplary isolation ring 50 with spherically adapted outer shape. This is arranged approximately rotationally symmetrical about an axis 52 which extends in the installed state approximately together with the first axis of the dome. But it can also be quite advantageous, the axis 52 something obliquely to the first axis, for example, proportional to an oblique orientation of a Rohransatzstutzens, which is usually in an angular range between 0 ° and 30 ° to the first axis.
  • a ripple of the insulation ring is provided, which is characterized by different radii 54, 56 of the insulation ring.
  • oil as mentioned above has a lower permittivity than, for example, pressboard, from which such insulation rings are preferably made, it makes sense to provide a minimum waviness with respect to the thickness of the corrugated insulation material, ie, for example, a thickness of 1 cm and a ripple of + / - 0.5cm or +/- 1cm.
  • An increased ripple would further reduce the displacement of the electric field in the adjacent oil channels, but reaches at least at Pressspan to mechanical limits.
  • FIG. 12 shows an exemplary second conductive element with insulating strips in a combined side / sectional view 60.
  • a conductive element 62 + 64 + 66 + 68 is rotationally symmetric about an axis 70 and has a cylindrical 62 and an axially adjacent hemispherical region 64.
  • At the second axial end of the cylindrical portion 62 it merges into a tapered hemisphere section 66 which is welded at its outermost axial second end to a torus-like electrode having a drop-like cross-section 68.
  • a two-part electrical and mechanical connection device 74, 76 is provided, which is connected with its first part 74 with a shield tube 72.
  • a plurality of flexible strips 78, 80, 82, 84 Arranged along the axis 70 on the radially outer surface of the conductive element are a plurality of flexible strips 78, 80, 82, 84, which partially have a rigid 80 or also flexible 78, 82, 84 regions. In the latter, these are indicated by corresponding slots. Radially between the outer surface of the conductive element 62 + 64 + 66 + 68 and the flexible strips, an additional insulating layer may be provided.
  • Fig. 4 shows a flexible X-bar 90 in different views 92, 98.
  • a flexible area 94 is shown enlarged in a detail drawing, in which slots 96 are shown. It is clear in the cross-sectional representation 98 that the respective bearing surfaces follow a radius which corresponds to that of each to be spaced cylindrical components.
  • Fig. 5 shows a third connection device in a top 100a and a tilted in 90 ° thereto sectional view 100b.
  • the connecting device has a disk-like, hollow-cylindrical first part 104, which is intended to be electrically and mechanically connected to a screen tube.
  • Axially adjacent a second part 102 of similar shape is arranged, which is intended to be connected to a conductive element, for example by means of a welded joint in its hemispherical region.
  • a first group of three parallel and perpendicular to the two disc-like parts of the connecting device aligned screw 106, 108 is disposed at the vertices of an imaginary equilateral first triangle 112 on top of the second disc-like part 102.
  • a second group of three parallel aligned screw 110 is disposed at the vertices of a second imaginary equilateral triangle, wherein all screw connections are arranged at equidistant intervals along a respective common, in this case identical, circle.
  • the circle encloses the hollow cylindrical interior of the two parts 102, 104 of the connecting device.
  • the screw connections 110 of the second group are designed to exert a tensile force between the two parts 102, 104 and space them with a maximum distance. In this case, a respective screw is guided through a threadless through hole of the second part 102 and opens into a thread adapted thereto in the first part 104. Both types of screw connections 106, 108, 110 are thus freely movable in one direction of movement and limiting in the opposite direction. The connecting device is locked exactly when the respective screwing apply a respective opposite locking force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Bodies (AREA)
  • Installation Of Bus-Bars (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Gas Or Oil Filled Cable Accessories (AREA)
  • Cable Accessories (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP10187700A 2010-10-15 2010-10-15 Durchführung für Hochspannungsausleitungen in Öltransformatoren Active EP2442319B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP10187700A EP2442319B1 (de) 2010-10-15 2010-10-15 Durchführung für Hochspannungsausleitungen in Öltransformatoren
BRPI1106400A BRPI1106400A2 (pt) 2010-10-15 2011-10-13 tampa esférica para linhas de saída de alta voltagem em transformadores a óleo
CN201110335851.8A CN102456470B (zh) 2010-10-15 2011-10-14 用于油浸变压器中的高压引出线的球盖
US13/273,865 US8618427B2 (en) 2010-10-15 2011-10-14 Spherical cap for high-voltage outgoing lines in oil transformers
KR1020110105279A KR20120039493A (ko) 2010-10-15 2011-10-14 오일 변압기에서 고전압 아웃고잉 라인을 위한 구형 캡
RU2011141753/07A RU2011141753A (ru) 2010-10-15 2011-10-14 Колпачок для высоковольтных выводов в масляных трансформаторах
HRP20130187AT HRP20130187T1 (hr) 2010-10-15 2013-03-04 Vodilica za uvođenje za visokonaponske vodove za rasterećenje u uljnim transformatorima

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10187700A EP2442319B1 (de) 2010-10-15 2010-10-15 Durchführung für Hochspannungsausleitungen in Öltransformatoren

Publications (2)

Publication Number Publication Date
EP2442319A1 EP2442319A1 (de) 2012-04-18
EP2442319B1 true EP2442319B1 (de) 2012-12-05

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ID=43828376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10187700A Active EP2442319B1 (de) 2010-10-15 2010-10-15 Durchführung für Hochspannungsausleitungen in Öltransformatoren

Country Status (7)

Country Link
US (1) US8618427B2 (ko)
EP (1) EP2442319B1 (ko)
KR (1) KR20120039493A (ko)
CN (1) CN102456470B (ko)
BR (1) BRPI1106400A2 (ko)
HR (1) HRP20130187T1 (ko)
RU (1) RU2011141753A (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2442321B1 (de) * 2010-10-15 2012-12-05 ABB Technology AG Durchführung für Hochspannungsausleitungen in Öltransformatoren
DE102015224568A1 (de) * 2015-12-08 2017-06-08 Siemens Aktiengesellschaft Vorrichtung zur elektrischen Verbindung von wenigstens vier elektrischen Leitern
KR101894534B1 (ko) * 2018-06-04 2018-09-04 제룡전기 주식회사 알루미늄 합금 변압기 외함의 볼트 취부방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806625A (en) * 1973-03-16 1974-04-23 Atomic Energy Commission High-voltage feedthrough assembly
US5550724A (en) * 1994-09-23 1996-08-27 Moulton; Herbert F. Electrod housing and cap assembly
CH695968A5 (de) 2001-12-12 2006-10-31 Wicor Holding Ag Kopfelektrode einer Ausleitung für Leistungstransformatoren sowie Verfahren zu deren Herstellung.
CN101656143B (zh) * 2008-08-22 2012-05-23 特变电工沈阳变压器集团有限公司 一种变压器用高压出线装置

Also Published As

Publication number Publication date
HRP20130187T1 (hr) 2013-03-31
CN102456470A (zh) 2012-05-16
CN102456470B (zh) 2015-11-25
KR20120039493A (ko) 2012-04-25
US20120090889A1 (en) 2012-04-19
EP2442319A1 (de) 2012-04-18
RU2011141753A (ru) 2013-04-20
BRPI1106400A2 (pt) 2015-12-29
US8618427B2 (en) 2013-12-31

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