EP2702597B1 - Coupe-circuit de surtension - Google Patents

Coupe-circuit de surtension Download PDF

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Publication number
EP2702597B1
EP2702597B1 EP12729020.3A EP12729020A EP2702597B1 EP 2702597 B1 EP2702597 B1 EP 2702597B1 EP 12729020 A EP12729020 A EP 12729020A EP 2702597 B1 EP2702597 B1 EP 2702597B1
Authority
EP
European Patent Office
Prior art keywords
surge arrester
housing
control cover
dissipation element
contacts
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
EP12729020.3A
Other languages
German (de)
English (en)
Other versions
EP2702597A1 (fr
Inventor
Dirk Springborn
Erhard Pippert
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
Publication of EP2702597A1 publication Critical patent/EP2702597A1/fr
Application granted granted Critical
Publication of EP2702597B1 publication Critical patent/EP2702597B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • H01C7/123—Arrangements for improving potential distribution
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
    • H01H2003/405—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing using a walking nut
    • 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
    • H01T1/00—Details of spark gaps
    • H01T1/16—Series resistor structurally associated with spark gap
    • 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
    • H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
    • H01T21/06—Adjustment of spark gaps
    • 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

Definitions

  • the invention relates to a surge arrester according to the preamble of patent claim 1.
  • Surge arresters are protective systems, for example, for switchgear, which in the event of overvoltages caused by lightning strikes or malfunctions of other subsystems dissipate these overvoltages to ground and thus protect other components of the switchgear.
  • Such a surge arrester comprises one or more cylindrical diverting elements, which have a varistor column made up of individual, likewise cylindrical varistor elements.
  • 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.
  • surge arresters For use in gas-insulated switchgear surge arresters have a fluid-tight housing, which surrounds the discharge element.
  • the housing is to increase the dielectric strength with a fluid, usually sulfur hexafluoride, filled.
  • 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 passage with a contact located on the outside of the housing, which serves to connect to the switchgear.
  • larger surge arresters often have at their high voltage end of a control hood, which is slipped over the end of the Ableit yarn as unilaterally closed cylinder.
  • the individual varistor elements have a high capacitance with respect to ground potential, but their series connection leads to a very small longitudinal capacitance, which leads to an inhomogeneous voltage distribution as of a certain length of the varistor column.
  • the varistor elements are therefore subject to higher voltages, which together with their resistive effect can lead to undesired heating.
  • the control hood now serves to homogenize the stress distribution along the length of the varistor column.
  • the surge arrester must be disconnected from the switchgear because of the high voltages which then occur. Otherwise, the surge arrester would divert the voltage to ground and the measurement result would be corrupted.
  • the invention has for its object to provide a surge arrester of the type mentioned, a structurally easier manufacture or interrupting the electrical connection.
  • the invention provides a surge arrester, with a discharge element, a control hood electrically connected to the discharge element and a fluid-tight housing in which the discharge element and the control hood are arranged and which has two in each case the interior with the outside of the housing electrically connecting contacts.
  • the diverting element and the control hood are designed to be movable relative to one another, wherein an electrical connection of one of the contacts via the diverting element to the other of the contacts can be produced or interrupted by the relative movement. Due to the relative movement of the control hood and the diverter element, an electrical connection to the switchgear can be established or interrupted in a particularly simple manner. For example, control hood and diverting element can be moved together in approximately different directions. Alternatively, the control hood can sit firmly and only the diverting be moved. In any case, the moving mass is lower than in the prior art, so that the mechanical elements required for the movement can be made structurally simpler.
  • the discharge element is arranged along a longitudinal axis of the housing and the control hood in Slidably disposed in the direction of this longitudinal axis. This results in a particularly compact arrangement.
  • the displaceability of the control hood along the longitudinal axis allows the best possible use of space and compliance with the required isolation distances producing and closing an electrical connection to the switchgear.
  • control hood is displaceable by means of a displaceable from outside the fluid-tight housing displacement device.
  • the surge arrester according to the invention can be configured in that the displacement device has a shaft which can be actuated by rotational movement, a push rod connected to the control hood and a transmission which translates the rotational movement of the shaft into a translational movement of the push rod.
  • the displacement device has a shaft which can be actuated by rotational movement, a push rod connected to the control hood and a transmission which translates the rotational movement of the shaft into a translational movement of the push rod.
  • the push rod is at least partially made of electrically insulating material.
  • This can be for example a glass fiber reinforced plastic. This advantageously ensures the insulation resistance, since voltage flashovers between the push rod and the housing are avoided.
  • a further embodiment of the surge arrester according to the invention provides that the shaft fluid-tight from the Inner is guided to the outside of the housing. This advantageously prevents the escape of fluid from the housing. Harmful environmental influences by the fluid are thus avoided. In addition, the dielectric strength is retained and the surge arrester thus requires little maintenance.
  • an advantageous embodiment of the invention provides that one end of the discharge element with one of the contacts and the other end of the discharge element are electrically connected to the control hood and that by the displacement of the control hood the electrical connection to the other of the contacts can be produced or interrupted. This allows to make and break the connection only to move the control hood. This is relative to the diverter relatively easy. A movement of the control hood therefore requires less mechanical effort.
  • control hood and the other of the contacts engage in a form-fitting manner with the electrical connection produced in such a way that they are radially fixed with respect to the longitudinal axis.
  • This has the effect that the control hood and contact center against each other at the contact closure and can not tilt.
  • This can lead to the largest possible contact area between the control hood and contact. This ensures a secure connection of the control hood to the high voltage potential of the contact.
  • control hood is connected to the deflecting element for displaceability in the direction of the longitudinal axis via slide bearings.
  • the sliding bearings are mounted laterally on end electrodes and guide and fix the control hood in the radial direction with respect to the longitudinal axis.
  • the control hood is also fixed radially over the contact. If, in addition, the earth-side end of the diverting element is, for example radially fixed by a fixed connection of a ground-side end electrode with the housing cover, so discharge element and control cover are fixed to each other with respect to the housing and so insensitive to vibrations, for example, during transport or earthquake.
  • FIGS. 1 and 2 show a surge arrester 1 in a sectional view.
  • a discharge element 20 is arranged in a fluid-tight housing 2, a discharge element 20 is arranged.
  • This discharge element 20 has a cylindrical varistor column 25, an upper end fitting 22, a lower end fitting 21 and a plurality of tension elements 23.
  • the varistor column 25 is composed of individual, also cylindrical Varistorblöcken.
  • end fittings 21 and 22 At the two ends of the varistor column 25 sit end fittings 21 and 22, of which in the Fig. 1 and 2 only the lower end fitting 21 is visible.
  • the end fittings 21, 22 are usually made of electrically conductive material.
  • Tension elements 23 are pressed in the end fittings 21, 22 under train and so hold the varistor column 25 together.
  • retaining disks 24 are inserted, which have holes through which the tension elements 23 are guided and thus stabilize the discharge element 20 additionally.
  • the housing 2 is substantially cylindrical.
  • the longitudinal axis 50 extends along the cylinder axis.
  • the discharge element 20 is aligned along this longitudinal axis 50.
  • the housing 2 is closed fluid-tight.
  • the top surface of the housing 2 is closed with a simple housing cover 4.
  • a contact 8 is electrically isolated through this housing cover 4 from the inside to the outside of the housing 2 and serves the ground terminal.
  • this contact 8 is electrically conductively connected to the diverting element 20, for example with a cable 15.
  • the connection is made here via a conductive connection plate 13.
  • Between this and the lower end fitting 21 is still an insulating spacer 14.
  • the connection of the cable 15 could alternatively be made directly to the lower end fitting 21, the insulating spacer 14 then deleted.
  • the end fitting 21 of the discharge element 20 is fastened to the housing cover 4.
  • the housing cover 4 is electrically insulated against the varistor column 25. The insulation takes place here through the intermediate piece 14.
  • the housing cover 4 has a connection, not illustrated here, via which fluid, for example sulfur hexafluoride, can be introduced into the housing 2 or drained off.
  • the top surface of the housing 2 is provided with a high-voltage feedthrough 5 in order to lead the electrical high-voltage potential into the housing 2 from the outside without danger of a flashover between high voltage and earthed housing 2.
  • the implementation 5 comprises a retaining ring 12, an insulator 6 and a contact 7, which is designed here as a plug contact.
  • the surge arrester 1 can be connected to a gas-insulated switchgear, not shown here.
  • the contact 7 is provided with an electrically conductive fitting 9.
  • the implementation is provided with sealing rings (10).
  • a substantially cylindrical, closed at one end control hood 40 is slipped over the high voltage end of the discharge element 20.
  • the control hood 20 is connected to a displacement device 30 which has a push rod 33, a transmission 32, which can be embodied, for example, as a trapezoidal thread drive, a shaft 31 guided fluid-tightly through the housing cover 4, and a control element 34 connected to this shaft 31 outside the housing 2 having.
  • a display device 35 can be attached to the operating element 34, which indicates whether the electrical connection is established or interrupted.
  • the shaft 31 can be set in a rotating movement. Via the gear 32, this rotational movement is converted into a linear movement of the push rod 33 in the direction of the longitudinal axis 50.
  • the push rod 33 in turn transmits this linear movement to the control hood 40.
  • the control hood 40 can thus be moved in the direction of the longitudinal axis 50 toward the contact 7 and away therefrom, thus establishing or interrupting an electrical connection. In the illustration in Fig. 1 the electrical connection is interrupted.
  • Fig. 3 shows a section of the high-voltage side end of the surge arrester 1 in a Schittdargna.
  • the electrical connection is made here.
  • the control hood 40 abuts the fitting 9 of the contact 7.
  • Control hood 40 and fitting 9 are shaped so that a bulge of the fitting 9 engages in a corresponding indentation of the closed end of the control hood 40.
  • the control hood 40 is thus fixed in the radial direction with respect to the longitudinal axis 50.
  • the end fitting 22 has plain bearings 41, which fix the control hood 40 radially with respect to the longitudinal axis 50 and thus guide the control hood 40 upon a displacement in the direction of the longitudinal axis 50.
  • the plain bearings 41 may be electrically conductive and thus simultaneously serve the electrical connection of the control hood 40 with the end fitting 22, but they can also be made of a non-conductive material, such as a plastic.
  • the electrical connection of the end fitting 22 with the control hood 40 can then be done for example via a flexible conductor strip.

Claims (9)

  1. Limiteur ( 1 ) de surtension ayant un élément ( 20 ) de limitation, une calotte ( 40 ) de commande reliée électriquement à l'élément ( 20 ) de limitation et un boîtier ( 2 ) étanche au fluide, dans lequel sont disposés l'élément ( 20 ) de limitation et la calotte ( 40 ) de commande et qui a deux contacts ( 7, 8 ) reliant électriquement respectivement l'intérieur à l'extérieur du boîtier ( 2 ),
    caractérisé
    en ce que l'élément ( 20 ) de limitation et la calotte ( 40 ) de commande sont constitués de manière à être mobiles l'un par rapport à l'autre, une liaison électrique de l'un des contacts ( 7, 8 ) à l'autre des contacts ( 8, 7 ) par l'intermédiaire de l'élément ( 20 ) de limitation pouvant être ménagée ou interrompue par le mouvement relatif.
  2. Limiteur ( 1 ) de surtension suivant la revendication 1,
    caractérisé
    en ce que l'élément ( 20 ) de limitation est monté le long d'un axe ( 50 ) longitudinal du boîtier et en ce que la calotte ( 40 ) de commande est montée coulissante dans la direction de cet axe ( 50 ) longitudinal.
  3. Limiteur ( 1 ) de surtension suivant la revendication 2,
    caractérisé
    en ce que la calotte ( 40 ) de commande peut coulisser au moyen d'un dispositif ( 30 ) de coulissement pouvant être actionné de l'extérieur du boîtier ( 2 ) étanche au fluide.
  4. Limiteur ( 1 ) de surtension suivant la revendication 3,
    caractérisé
    en ce que le dispositif ( 30 ) de coulissement comporte un arbre ( 31 ) pouvant être actionné par un mouvement de rotation, une barre ( 33 ) de poussée reliée à la calotte ( 40 ) de commande et un entraînement ( 32 ) transformant le mouvement de rotation de l'arbre ( 31 ) en un mouvement de translation de la barre ( 33 ) de poussée.
  5. Limiteur ( 1 ) de surtension suivant la revendication 4,
    caractérisé
    en ce que la barre ( 33 ) de poussée est, au moins en partie, en un matériau isolant du point de vue électrique.
  6. Limiteur ( 1 ) de surtension suivant la revendication 4 ou 5,
    caractérisé
    en ce que l'arbre ( 31 ) passe d'une manière étanche au fluide de l'intérieur à l'extérieur du boîtier ( 2 ).
  7. Limiteur ( 1 ) de surtension suivant l'une des revendications 2 à 6,
    caractérisé
    en ce qu'une extrémité de l'élément ( 20 ) de limitation est reliée électriquement à l'un des contacts ( 7, 8 ) et l'autre extrémité de l'élément ( 20 ) de limitation à la calotte ( 40 ) de commande et en ce que la liaison électrique à l'autre des contacts ( 8, 7 ) peut être ménagée ou interrompue par le coulissement de la calotte ( 40 ) de commande.
  8. Limiteur ( 1 ) de surtension suivant la revendication 7,
    caractérisé
    en ce que la calotte ( 40 ) de commande et l'autre des contacts ( 8, 7 ) s'interpénètrent à complémentarité de forme, lorsque la liaison électrique est ménagée, de manière à être immobilisés radialement par rapport à l'axe longitudinal.
  9. Limiteur ( 1 ) de surtension suivant la revendication 8,
    caractérisé
    en ce que la calotte ( 40 ) de commande est, pour la possibilité de coulisser dans la direction de l'axe longitudinal, reliée à l'élément ( 20 ) de limitation par des paliers ( 41 ) lisses.
EP12729020.3A 2011-06-10 2012-05-29 Coupe-circuit de surtension Active EP2702597B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011077394A DE102011077394A1 (de) 2011-06-10 2011-06-10 Überspannungsableiter
PCT/EP2012/059973 WO2012168112A1 (fr) 2011-06-10 2012-05-29 Coupe-circuit de surtension

Publications (2)

Publication Number Publication Date
EP2702597A1 EP2702597A1 (fr) 2014-03-05
EP2702597B1 true EP2702597B1 (fr) 2015-03-18

Family

ID=46331229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12729020.3A Active EP2702597B1 (fr) 2011-06-10 2012-05-29 Coupe-circuit de surtension

Country Status (6)

Country Link
EP (1) EP2702597B1 (fr)
JP (1) JP5702022B2 (fr)
KR (1) KR101476580B1 (fr)
CN (1) CN103608874A (fr)
DE (1) DE102011077394A1 (fr)
WO (1) WO2012168112A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2669903B1 (fr) 2012-05-30 2018-09-12 Siemens Aktiengesellschaft Paratonnerre capsulé avec passage central
DE102012217310A1 (de) 2012-09-25 2014-03-27 Siemens Aktiengesellschaft Überspannungsableiter
DE102012217503A1 (de) 2012-09-27 2014-03-27 Zf Friedrichshafen Ag Getriebe für ein Kraftfahrzeug
WO2014173462A1 (fr) 2013-04-26 2014-10-30 Siemens Aktiengesellschaft Parafoudre encapsulé
EP2846333A1 (fr) 2013-09-09 2015-03-11 Siemens Aktiengesellschaft Paratonnerre isolé du gaz
EP2854141B1 (fr) 2013-09-30 2020-03-25 Siemens Aktiengesellschaft Paratonnerre
EP3043024A1 (fr) 2015-01-09 2016-07-13 Siemens Aktiengesellschaft Refroidissement de plate-forme d'aube et turbine à gaz correspondante
EP3048617B1 (fr) * 2015-01-26 2020-08-12 Siemens Aktiengesellschaft Paratonnerre
EP3131098B1 (fr) 2015-08-12 2018-02-28 Siemens Aktiengesellschaft Paratonnerre encapsule
DE102016202327A1 (de) * 2016-02-16 2017-08-17 Siemens Aktiengesellschaft Antriebsanordnung zur Ausbildung einer Trennstrecke für einen Überspannungsableiter
DE102016202326A1 (de) * 2016-02-16 2017-08-17 Siemens Aktiengesellschaft Antriebseinrichtung für einen Überspannungsableiter
DE102016202329A1 (de) * 2016-02-16 2017-08-17 Siemens Aktiengesellschaft Überspannungsableiteranordnung
DE102016206580A1 (de) * 2016-04-19 2017-11-02 Siemens Aktiengesellschaft Anordnung zum Überspannungsschutz einer mit einer Isolierflüssigkeit isolierten elektrischen Anlage
JP6595428B2 (ja) 2016-09-16 2019-10-23 株式会社東芝 避雷器
DE102018215754A1 (de) * 2018-09-17 2020-03-19 Siemens Aktiengesellschaft Überspannungsableiter und Verfahren zum Wechseln einer Antriebsanordnung eines Überspannungsableiters

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126287U (ja) * 1984-07-23 1986-02-17 株式会社東芝 避雷器
JPS62278712A (ja) * 1986-05-26 1987-12-03 三菱電機株式会社 避雷器断路装置
JPH0186416U (fr) * 1987-11-25 1989-06-08
JPH08265925A (ja) * 1995-03-23 1996-10-11 Meidensha Corp ガス絶縁開閉装置
JPH09284927A (ja) * 1996-04-09 1997-10-31 Nissin Electric Co Ltd 避雷器を備えたガス絶縁電気機器
KR19980011799U (ko) * 1996-08-22 1998-05-25 황인기 과전압방지용 안전차단기
JPH10322822A (ja) 1997-05-16 1998-12-04 Toshiba Corp ガス絶縁開閉装置用避雷器
JP2001267108A (ja) * 2000-03-22 2001-09-28 Nissin Electric Co Ltd ガス絶縁開閉装置用避雷器
EP1603140A1 (fr) * 2004-06-04 2005-12-07 ABB Technology AG Composant actif pour limiteur de surtension encapsulé
DE102008034890A1 (de) * 2008-07-24 2010-02-04 Siemens Aktiengesellschaft Überspannungsableiteranordnung mit einem mehrere Ableitersäulen aufweisenden Ableitstrompfad

Also Published As

Publication number Publication date
KR101476580B1 (ko) 2014-12-24
JP2014523639A (ja) 2014-09-11
JP5702022B2 (ja) 2015-04-15
DE102011077394A1 (de) 2012-12-13
CN103608874A (zh) 2014-02-26
EP2702597A1 (fr) 2014-03-05
KR20140012164A (ko) 2014-01-29
WO2012168112A1 (fr) 2012-12-13

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