EP3082136B1 - Paratonnerre à isolation gazeuse - Google Patents

Paratonnerre à isolation gazeuse Download PDF

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Publication number
EP3082136B1
EP3082136B1 EP15163468.0A EP15163468A EP3082136B1 EP 3082136 B1 EP3082136 B1 EP 3082136B1 EP 15163468 A EP15163468 A EP 15163468A EP 3082136 B1 EP3082136 B1 EP 3082136B1
Authority
EP
European Patent Office
Prior art keywords
housing
active part
closure
surge arrester
opening
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.)
Not-in-force
Application number
EP15163468.0A
Other languages
German (de)
English (en)
Other versions
EP3082136A1 (fr
Inventor
Markus Sulitze
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
Original Assignee
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
Priority to EP15163468.0A priority Critical patent/EP3082136B1/fr
Priority to KR1020160043233A priority patent/KR101870505B1/ko
Priority to JP2016079935A priority patent/JP6316335B2/ja
Publication of EP3082136A1 publication Critical patent/EP3082136A1/fr
Application granted granted Critical
Publication of EP3082136B1 publication Critical patent/EP3082136B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/04—Housings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Definitions

  • Surge arresters are protective systems, for example for high-voltage or medium-voltage switchgear, which dissipate these overvoltages to ground in the event of overvoltages due to lightning strikes or malfunctions of other subsystems and thus protect other components of the switchgear.
  • Such a surge arrester comprises one or more active parts with cylindrical discharge elements, which have a varistor column constructed from individual, likewise cylindrical varistor elements, which extends along the cylinder axis.
  • Varistor elements are characterized by a voltage-dependent resistance. At low voltages these act as insulators. From a certain threshold voltage, which is material-dependent, they show a good conductivity.
  • varistor elements are made of metal oxides such as zinc oxide. The diverter is limited at both ends by end fittings that make electrical contact with the switchgear and ground. To ensure a good electrical contact even under mechanical stress, the varistor column must be held together under pressure. This can be done by tension members, for example, ropes or rods are preferably clamped in glass fiber reinforced plastic in the end fittings under train. The tension elements surround the varistor column and thus form a cage around them.
  • a fluid-tight housing which surrounds the discharge element.
  • the housing is to increase the dielectric strength with a fluid, usually sulfur hexafluoride (SF 6 ), filled.
  • SF 6 sulfur hexafluoride
  • the housing is usually made of metal and is electrically grounded.
  • An end fitting of the delivery column is grounded via a contact made through the housing.
  • the other end fitting is electrically connected via a housing bushing with a located on the outside of the housing high-voltage contact, which serves to connect to the switchgear.
  • the invention relates to a surge arrester for a gas-insulated switchgear.
  • Such a surge arrester with a gas-insulated housing which has three active parts.
  • the housing consists of a cast cylindrical shell, a high voltage side cover with a high voltage bushing for each active part and a lid on the ground.
  • This has many openings and fasteners, which is complicated to manufacture and costly.
  • the assembly of the surge arrester is complex because all active parts must be attached to the lid. Thereafter, the lid is placed with the attached active parts on the housing shell. The active parts must be threaded into corresponding brackets on the high-voltage side lid, which is cumbersome.
  • the object of the invention is to provide a surge arrester, which is inexpensive to manufacture, and which can be easily assembled.
  • a surge arrester which has at least one active part arranged in a fluid-tight housing, as is the case for gas-insulated switchgear.
  • the active part is, as known with surge arresters, a column of voltage-dependent resistors, so-called varistors, which is clamped between two end fittings.
  • the invention relates to surge arrester with one or more active parts. Special advantages arise Ln a version with three active parts.
  • the housing has a side wall and a bottom and is on the opposite side of the floor with a
  • Side wall and floor are made in one piece, in particular cast in one piece, for example, aluminum or steel.
  • the bottom has a separate opening for each active part, through which an active part can be inserted into the housing.
  • the shape and clear width of the opening must be dimensioned so that a fully assembled active part can be inserted through this into the housing.
  • Each opening is closed fluid-tight by a closure.
  • the surge arrester has several, in particular three active parts. For each of the active parts an opening in the bottom is provided, with three active parts, the floor thus has three openings.
  • Such a housing dispenses with a frequently produced only by machining soil and is therefore inexpensive to manufacture, for example by the soil is cast in one piece with the side wall.
  • a surge is easy to assemble, since the active parts can be individually inserted through the openings and mounted and not together.
  • each opening leads through an externally arranged at the bottom, in particular cast flange.
  • the flange defines the opening in a plane perpendicular to the longitudinal axis. It serves to fasten the closure and thus facilitates the assembly.
  • the flange is curved outward, making it easier to access.
  • the outer diameter of the housing tapers towards the bottom and widens towards the lid.
  • the inner diameter can be adapted to the insulating distances increasing over the height of the housing toward the cover, and thus its volume can be reduced. This saves on the one hand material for the housing and on the other hand insulating fluid for the filling.
  • closure and the cross section of the opening are rectangular, in particular square. Alternatively, these are round. Both versions allow a particularly simple and thus cost-effective production of the closure.
  • the active part is attached to the closure, which allows easy installation.
  • the active part is electrically connected to a feedthrough conductor of a feedthrough, which is passed electrically insulated against the closure therethrough.
  • the bushing leads an electrical connection from the outside into the housing.
  • the electrical connection is in this case insulated against the housing and in particular against the closure, which is in electrical contact with the housing.
  • the fact that the electrical connection is guided through the closure can be dispensed with a reworking of the housing, for example by introducing holes for the feedthrough conductor.
  • the active part on the feedthrough conductor which may be designed for example as a bolt attached. An assembly of the active part is facilitated.
  • the closure, bushing and active part form a unit which can be preassembled outside the housing.
  • the implementation is attached to the closure and the active part attached to the feedthrough conductor. This can be done outside of the housing and thus easier than in the limited space within the housing.
  • the entire preassembled unit can then be mounted by inserting the active part into the opening until the closure rests on the flange. The closure then only has to be fastened to the flange.
  • FIG. 1 shows a known surge arrester 1 from the EP 2 846 333 A1 .
  • An enclosed fluid-tight housing 21 has a tubular housing wall 22 with flanges 38 at the tube ends. On the flanges 38, a high-voltage leadthrough 34 are fixed on a high-voltage connection side 31, and a cover 39 is fastened in a fluid-tight manner on the ground connection side 32.
  • the housing 21 consists essentially of an electrically conductive material such as steel or aluminum and is grounded during operation.
  • the lid 39 is a plate of metal, for example, and may have a pressure relief port 35 which is closed with a rupture disk or membrane, not shown. Furthermore, the cover 39 for each disposed in the housing 21 active part 2 an opening for a ground-side feedthrough 15.
  • the high-voltage bushing 34 consists of a frame 37 with an insulating part 36 made of an electrically insulating material, such as cast resin, in which a high-voltage contact 28 is used for each of the active parts 2 arranged in the housing 21.
  • a high-voltage contact 28 is used for each of the active parts 2 arranged in the housing 21.
  • the electrical high voltage potential can be performed without risk of rollover between high voltage and grounded housing 21 from the outside into the housing 21 into it.
  • each active part 2 has a cylindrical discharge element 20 extending along a longitudinal axis 30.
  • the diverting element 20 is usually formed as a stack of cylindrical varistor elements with a voltage-dependent resistor.
  • an end fitting 23, 24 is arranged in each case.
  • the traction elements 25 serve to press the varistor elements together to make good electrical contact therebetween and thus hold the stack together. They also serve to secure the stack against slippage of the varistor elements, for example during transport.
  • the end fitting 23 is attached directly to a feedthrough conductor 16 or preferably screwed.
  • the feed-through conductor 16 represents the earth contact.
  • the electrical contact is made to the outside of the housing 21, which is connected in operation with the earth.
  • the end fitting 24 On the high-voltage connection side 31, the end fitting 24 has an umbrella hood 27. It serves to shield the corners or edges of the end fitting 24 from the high voltage electrical fields.
  • FIGS. 2 and 3 show an inventive embodiment of a surge arrester 1.
  • three active parts 2 are arranged in a fluid-tight housing, of which only two or one are visible because of the sectional view.
  • the housing 3 is pot-shaped made of an electrically conductive material.
  • a substantially cylindrical side wall 4 merges seamlessly into the bottom 5 in the region of the ground connection side 32. The transition takes place in a rounding 10.
  • Sidewall 4 and bottom 5 are integrally molded, for example made of steel or aluminum.
  • the housing 3 is closed with a cover 6.
  • the lid 6 is designed as a high voltage feedthrough 34.
  • a disc-like insulating member 36 is arranged, for example made of cast resin.
  • High voltage contacts 28 embedded in the insulating member 36 provide an electrically conductive connection from the interior of the housing 3 to the outside.
  • the cover 6 is fastened by means of screws to a flange 38 of the housing 3.
  • the high-voltage side end fitting 24 of the active part 2 engages with a nose in a corresponding recess of the high-voltage contact 28 and is fixed in directions perpendicular to the longitudinal axis 30.
  • the bottom 5 has, for each active part 2, an opening 7 whose inside width is dimensioned such that an active part 2 can be introduced through this opening 7 into the housing 3 along the longitudinal axis 30.
  • the cross section of the opening 7 is substantially square with rounded corners. He can also be around.
  • each opening 7 has an outwardly curved flange 9.
  • the outside of each flange 9 forms a flat surface on which a closure 8 is placed.
  • Flange 9 and bottom 5 are integrally formed with the side wall 4, for example, as a single casting.
  • the active part 2 is attached on the inside of the flange 9, the active part 2 is attached.
  • the active part 2 can either be attached directly to the closure 8 and is then electrically connected thereto, or via an electrically insulating intermediate piece.
  • the fastening takes place by means of a feedthrough 15.
  • the feedthrough 15 consists of a feed-through conductor 16, which from the outside into the interior of the Housing 3 leads and a two-part lead-through body 17 made of an electrically insulating material such as cast resin. A part of the feedthrough body 17 lies on the outside of the closure 8, the other on the inside. One or both parts of the feedthrough body 17 may have a seal towards the closure 8.
  • the feedthrough conductor 16 penetrates both the parts of the feedthrough body 17 and the closure 8.
  • the closure 8 is preferably made of an electrically conductive material, for example a metal. In this case, the feedthrough conductor 16 is electrically insulated from the shutter 8.
  • the feedthrough conductor 16 has at its outer end a shoulder which is supported on the feedthrough body 17. At its inner end, it has a thread on which an end fitting 23 of the active part 2 is screwed and thus secured thereto.
  • the active part 2 is thereby electrically isolated from the closure 8 and the housing 3.
  • the closure 8, the passage 15 and the active part 2 thus form a unit which can be mounted outside the housing 3.
  • the feedthrough conductor 16 is inserted through a part of the feedthrough body 17 and through a hole in the closure 8.
  • the second part of the feedthrough body 17 is attached to the feedthrough conductor 16 and the active part 2 is screwed to the feedthrough conductor 16.
  • the earth-side end fitting 23 of the active part 2 has a corresponding longitudinally aligned 30 thread. The fluid-tightness is ensured by two seals 19.
  • This so preassembled unit is installed in the housing 3 by the active part 2 is inserted along its longitudinal axis 30 through the opening 7 in the housing 3 until the closure 8 rests on the flange 9.
  • the high voltage terminal side 31 engages a nose of the end fitting 24 in a corresponding recess of a high voltage contact 28 of the high voltage feedthrough 34.
  • the shutter 8 is then by means of Screws 18 attached to the flange 9.
  • a seal 19 ensures that the housing is sealed fluid-tight.
  • the insulation distances must be greater both between the active parts 2, as well as between an active part 2 and the usually grounded housing 3 on the high voltage side, as on the ground side.
  • the housing inner diameter over the length of the housing is constant and dimensioned according to the necessary isolation distances on the high voltage side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Claims (7)

  1. Parafoudre (1) comprenant au moins une partie (2) active disposée dans un boîtier (3) étanche au fluide, le boîtier (3) ayant une paroi (4) latérale et un fond (5) et étant, du côté opposé au fond (5), fermé par un couvercle (6), la paroi (4) latérale et le fond (5) étant réalisés d'une seule pièce et le fond (5) ayant, pour chaque partie (2) active, une ouverture (7), par laquelle une partie (2) active peut être insérée, chaque ouverture (7) étant fermée d'une manière étanche au fluide par une fermeture (8),
    caractérisé en ce que
    le fond est prévu du côté de la tension de terre et en ce que chaque ouverture (7) passe à travers une bride (9) propre montée à l'extérieur sur le fond (5).
  2. Parafoudre (1) suivant la revendication 1,
    caractérisé en ce que
    le diamètre intérieur du boîtier se rétrécit vers le fond (5) et s'agrandit vers le couvercle (6).
  3. Parafoudre (1) suivant l'une des revendications 1 ou 2,
    caractérisé en ce que
    la fermeture (8) et l'ouverture (7) sont rectangulaires en étant notamment carrées.
  4. Parafoudre (1) suivant l'une des revendications 1 à 3,
    caractérisé en ce que
    chaque partie (2) active est fixée à une fermeture (8).
  5. Parafoudre (1) suivant la revendication 4,
    caractérisé en ce qu'
    une traversée (15) a un conducteur (16) de traversée, qui est relié électriquement à la partie (2) active et qui passe à travers la fermeture (8) en étant isolée électriquement de la fermeture (8).
  6. Parafoudre (1) suivant la revendication 5,
    caractérisé en ce que
    la partie (2) active est fixée au conducteur (16) de traversée.
  7. Parafoudre (1) suivant l'une des revendications 5 ou 6,
    caractérisé en ce que
    la fermeture (8), la traversée (15) et la partie (2) active forment une unité pouvant être montée à l'avance à l'extérieur du boîtier (3).
EP15163468.0A 2015-04-14 2015-04-14 Paratonnerre à isolation gazeuse Not-in-force EP3082136B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP15163468.0A EP3082136B1 (fr) 2015-04-14 2015-04-14 Paratonnerre à isolation gazeuse
KR1020160043233A KR101870505B1 (ko) 2015-04-14 2016-04-08 기체 절연 서지 피뢰기
JP2016079935A JP6316335B2 (ja) 2015-04-14 2016-04-13 ガス絶縁サージアレスタ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15163468.0A EP3082136B1 (fr) 2015-04-14 2015-04-14 Paratonnerre à isolation gazeuse

Publications (2)

Publication Number Publication Date
EP3082136A1 EP3082136A1 (fr) 2016-10-19
EP3082136B1 true EP3082136B1 (fr) 2017-11-01

Family

ID=53016465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15163468.0A Not-in-force EP3082136B1 (fr) 2015-04-14 2015-04-14 Paratonnerre à isolation gazeuse

Country Status (3)

Country Link
EP (1) EP3082136B1 (fr)
JP (1) JP6316335B2 (fr)
KR (1) KR101870505B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020053963A1 (fr) * 2018-09-11 2020-03-19 株式会社 東芝 Parafoudre et son procédé de fabrication
DE102020212640A1 (de) 2020-10-07 2022-04-07 Siemens Energy Global GmbH & Co. KG Leiteranordnung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572601U (fr) * 1980-06-04 1982-01-08
US4424547A (en) * 1980-11-04 1984-01-03 General Electric Company Surge suppressor construction
EP1603141B1 (fr) * 2004-06-04 2016-08-24 ABB Schweiz AG Limiteur de surtensions avec isolation au gaz
JP2007158041A (ja) * 2005-12-06 2007-06-21 Japan Ae Power Systems Corp アレスタ
EP2466596B1 (fr) * 2010-12-16 2013-08-28 ABB Research Ltd. Composant doté d'une protection contre les surtensions et leur procédé de contrôle
EP2713375A1 (fr) * 2012-09-28 2014-04-02 Siemens Aktiengesellschaft Paratonnerre
KR20150135486A (ko) * 2013-04-26 2015-12-02 지멘스 악티엔게젤샤프트 밀봉 구조의 서지 피뢰기
EP2846333A1 (fr) 2013-09-09 2015-03-11 Siemens Aktiengesellschaft Paratonnerre isolé du gaz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
KR101870505B1 (ko) 2018-06-22
JP6316335B2 (ja) 2018-04-25
JP2016208022A (ja) 2016-12-08
EP3082136A1 (fr) 2016-10-19
KR20160122642A (ko) 2016-10-24

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