EP2666170A1 - Limiteur de tension à configuration en cage - Google Patents

Limiteur de tension à configuration en cage

Info

Publication number
EP2666170A1
EP2666170A1 EP12710041.0A EP12710041A EP2666170A1 EP 2666170 A1 EP2666170 A1 EP 2666170A1 EP 12710041 A EP12710041 A EP 12710041A EP 2666170 A1 EP2666170 A1 EP 2666170A1
Authority
EP
European Patent Office
Prior art keywords
surge arrester
reinforcing element
fittings
armature
fitting
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.)
Withdrawn
Application number
EP12710041.0A
Other languages
German (de)
English (en)
Inventor
Hartmut Klaube
Christoph Koch
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.)
Tridelta Ueberspannungsableiter GmbH
Original Assignee
Tridelta Ueberspannungsableiter GmbH
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 Tridelta Ueberspannungsableiter GmbH filed Critical Tridelta Ueberspannungsableiter GmbH
Publication of EP2666170A1 publication Critical patent/EP2666170A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
    • 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

Definitions

  • the invention relates to a surge arrester with
  • Surge arresters are connected in power systems between the electrical line and ground, to possibly dissipate an overvoltage in this line and so protect other components or devices of the power grid.
  • Such surge arresters usually contain a stack of cylindrical varistor blocks,
  • This arrangement is made of a housing
  • Reinforcing elements are braced from an insulating plastic.
  • the reinforcing elements in turn are attached to the fittings.
  • Such a surge arrester is known, for example, from EP 0614198 A.
  • EP 0614198 A In the surge arrester of this document are two separate
  • Isolierstoffschlaufe are formed, mounted such that each insulating loop connects both valves, wherein the two IsolierstoffSchrise each other
  • a problem with such a surge arrester is that at least two independent insulating straps are needed. This will be relatively many individual
  • Insulating material are connected, which is meandered repeatedly between the two valves back and forth, so that it covers the entire circumference of the fittings.
  • Figure 2 is a view of a surge arrester of a
  • Figure 3 is a plan view of a valve of the
  • Figure 4 is a side view of another fitting of
  • Figure 5 is a view of a second invention
  • Figure 6 is a plan view of a fitting in the second
  • Figure 7 is a side view of another fitting of
  • the surge arrester with cage design shown in Figure 1 contains at least two fittings 3 and a housing 9 with umbrellas 11.
  • the housing 9 serves to protect against the environment and is preferably formed of silicone.
  • the housing 9 can be manufactured by spraying or casting.
  • the screens 11 have the function of a creepage path for the current at the
  • the umbrellas can be shaped differently. When used in an interior, the umbrellas can be completely dispensed with.
  • the faucets 3 are made of metal, preferably aluminum or stainless steel, and are provided with means to enable an electrical connection to a power network. In addition, they are designed to provide a mechanical connection
  • varistor blocks 5 are arranged in a stack between the fittings 3, as can be seen in Figure 2, which is a view of a first embodiment of the invention
  • varistor blocks 5 known ceramic disks having a voltage-dependent resistor (variable resistor) can be used. At low voltages they work as near-perfect insulators, while at high voltages they have good conductivity.
  • commercially available varistor blocks are made based on zinc oxide - ZnO. However, the invention is not limited to zinc oxide, and other metal oxides, plastics and silicon carbide can be used for example for the Varistorblöcke. In addition, in addition to the Varistorblöcken 5 even more blocks, such as metal blocks 6 or
  • Spark gap blocks may be included in the stack so as to adapt the length of the surge arrester, its heat transfer and operation to the needs of the particular occasion. As usual, beyond that
  • Error elements such as disc springs, may be provided in the stack of Varistorblöcke 5, for a certain elasticity and to maintain the electrical
  • the varistor blocks 5 are formed as circular cylinders with a diameter of, for example, 5 cm and a height of 4 cm. On both sides of the varistor blocks 5 are not shown in detail
  • the contacting thin aluminum discs may be provided between the Varistorblöcken 5.
  • a stack formed by stacking such varistor blocks 5 and possible metal blocks 6 is in the case of the surge arrester shown in FIG.
  • the fittings 3 are by a projecting from the surge arrester central screw 4, the well contacted, the electric varistor blocks 5 so
  • Installation or power supply networks can be integrated.
  • the fittings are 3 blocks of aluminum with a diameter slightly larger than that of the varistor blocks 5.
  • the varistor blocks 5 facing surface of at least one valve 3 can by suitable shaping so
  • the stack of varistor blocks 5 with an intervening metal block 6 is shown between the two fittings 3.
  • the stack is formed by a reinforcing element 7 in the form of a
  • the reinforcing element 7 is in the form of a closed
  • Loop is formed so that four loop ends 19a,
  • a central screw 4 is formed as a clamping screw, which is accommodated in a through hole, and which makes it possible to clamp the Studentsnapssabieiter during assembly.
  • Such a reinforcing element 7 can be made by placing a bundle of glass fibers in a mold and then potting with a suitable plastic.
  • the reinforcing element 7 is manufactured by glass fiber injection molding. In this case, plastic compound provided with glass fibers is injected into a mold.
  • Tightening screw 4 shown fitting 3 are used and the two opposite this fitting opposite loop ends 19, 19a and 19b with respect to each other can be bent, so that it is easily possible, the Varistorblöcke 5, the
  • Reinforcing element 7 allows, in its original form
  • Lifting force can be repeatedly executed.
  • the fittings 3 can be manufactured as castings, wherein the shoulder 13 or the groove 15 and the projection 17 can already be formed during casting. Alternatively, it is possible to mill these parts into the aluminum block.
  • FIG. 3 shows a plan view of the surge arrester of FIG. 2, in which the armature 3 with the shoulders 13 can be seen.
  • two loop ends are
  • the reinforcing element 7 is formed of plastic in one piece, despite its dimensional stability allows some flexibility in terms of Lengths of the individual sections 7a, 7b, 7c and 7d, so that small manufacturing variations of the fittings 3 and the reinforcing member 7 is not uneven
  • FIG. 4 shows a side view in detail of the second
  • Varistor blocks 5 and reinforcing element 7 can then be made so that the reinforcing element 7 snaps into the groove 15 and thus holds the stack.
  • the guide in the groove 15 has the advantage that the fitting 3 is fixed in its final position, and can not slip further into the stack, as required.
  • Tightening the clamping screw 4 can then be done easily and without risk of damaging the Varistorblöcke 5.
  • the fitting has a polygonal cross-section, in the example of Figure 2 is approximately rectangular, wherein the
  • FIG. 5 shows a second embodiment according to the invention, which differs from that shown in Figure 2 in that two reinforcing elements 7, each in its own
  • the second armature 3 is again formed so that in its side surface grooves 15 and projections 17 are formed, in which the respective loop ends of the reinforcing elements 7 can snap.
  • the end fitting 3 is provided with the central clamping screw 4 with the two reinforcing elements 7.
  • Loop ends of the reinforcing elements 7 are spread, so that the varistor blocks 5, the metal block 6 and the second end fitting 3 can be used. Then, the mechanical spread of the reinforcing elements 7 is released, so that the respective loop ends in the grooves 15 to the
  • surge arrester exercised. After the surge arrester core thus produced is cleaned in a corresponding process step and impregnated if necessary, it is also encapsulated or encapsulated with a silicone housing, wherein at the same time the screens are formed.
  • Figure 6 shows a view of a fitting 3 with the
  • FIG. 7 shows a side view in detail of the second fitting 3 in this embodiment. This view corresponds to the illustration in FIG. 4.
  • Reinforcing elements 7 are provided. In this way, eight parallel portions of the reinforcing element 7 can extend from one armature 3 to the other, and the
  • each of the reinforcing elements 7 could rest on each fitting 3 with more than two loop ends,
  • each armature 3 it would be possible to provide three loop ends on each armature 3. Also, the invention is not limited to provide two reinforcing elements 7. If greater stability is required, more than two reinforcing elements 7 could be attached.
  • the reinforcing element 7 has a rectangular cross-section. This is to be preferred, since thus the respective groove 15 or the shoulder 13 can be formed accordingly, so that a good circulation of the
  • the invention is not limited, and a round cross section for the
  • the groove or the shoulder is formed with an undercut to prevent lateral slippage of the
  • the groove is formed so that the reinforcing element 7 is not only held in a form-fitting manner by the support, but is additionally fixed by frictional engagement. This has the
  • the central clamping screw 4 is provided in the end fitting 3, around which the loops of
  • valve 3 be provided opposite valve 3. It is also possible to provide clamping screws on both fittings.
  • the fittings 3 are each end fittings, which also provide for the electrical connection of the surge arrester to the line. But it is also possible to screw on the one fitting 3 with the projection 17 and the groove 15 an identical fitting 3 with opposite orientation, and thus to extend the surge arrester to twice the length. The fitting 3 would then no end fitting but a middle fitting. It is also possible to form on the side surface of the fitting 3 corresponding grooves and projections with opposite orientation, so that the fitting 3 can be used as a coupling piece in a surge arrester. In this way are surge arresters with larger overall lengths
  • Porcelain housing if desired.

Landscapes

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

Abstract

L'invention concerne un limiteur de tension comprenant au moins deux garnitures (3) opposées l'une à l'autre, au moins un bloc varistance (5) qui est disposé entre les garnitures (3) et au moins un élément de renforcement (7) se présentant sous forme de boucle fermée qui maintient les garnitures (3) et le bloc varistance (5) réunis sous l'effet de la pression exercée. Selon l'invention, l'élément de renforcement (7) est maintenu au niveau de chacune des deux garnitures (3) respectivement sur au moins deux côtés de la garniture (3), ce qui permet d'obtenir quatre segments (7a, 7b, 7c et 7d) de l'élément de renforcement (7), qui s'étendent d'une garniture (3) à l'autre (3) et assurent la stabilité mécanique du limiteur de tension.
EP12710041.0A 2011-01-21 2012-01-20 Limiteur de tension à configuration en cage Withdrawn EP2666170A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011009124A DE102011009124A1 (de) 2011-01-21 2011-01-21 Überspannungsableiter mit Käfig-Design
PCT/EP2012/050916 WO2012098250A1 (fr) 2011-01-21 2012-01-20 Limiteur de tension à configuration en cage

Publications (1)

Publication Number Publication Date
EP2666170A1 true EP2666170A1 (fr) 2013-11-27

Family

ID=45875922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12710041.0A Withdrawn EP2666170A1 (fr) 2011-01-21 2012-01-20 Limiteur de tension à configuration en cage

Country Status (7)

Country Link
US (1) US20140218834A1 (fr)
EP (1) EP2666170A1 (fr)
CN (1) CN103430247A (fr)
BR (1) BR112013018571A2 (fr)
DE (1) DE102011009124A1 (fr)
MX (1) MX2013008447A (fr)
WO (1) WO2012098250A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011078210A1 (de) * 2011-06-28 2013-01-03 Siemens Aktiengesellschaft Überspannungsableiter
EP2953141B1 (fr) * 2014-06-04 2016-09-28 ABB Schweiz AG Module de limiteur de surtension et limiteur de surtension
EP2998970B1 (fr) * 2014-09-22 2017-08-02 Siemens Aktiengesellschaft Limiteur du surtension
EP3144942B1 (fr) 2015-09-18 2018-02-21 Siemens Aktiengesellschaft Dispositif de protection contre les surtensions
CN106373681B (zh) * 2016-11-02 2018-07-06 广东福德电子有限公司 一种启动电阻防震结构
CN113299445A (zh) * 2021-05-28 2021-08-24 固力发电气有限公司 一种高压复合支柱绝缘子

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566183A (en) * 1968-07-11 1971-02-23 Gen Electric Lightning arrester cooling apparatus
US4656555A (en) * 1984-12-14 1987-04-07 Harvey Hubbell Incorporated Filament wrapped electrical assemblies and method of making same
GB8527548D0 (en) 1985-11-08 1985-12-11 Raychem Gmbh Electrical equipment
CA1334990C (fr) * 1988-03-31 1995-03-28 John D. Sakich Appareils electriques modulaires avec dispositif de decompression
US5043838A (en) * 1989-03-31 1991-08-27 Hubbell Incorporated Modular electrical assemblies with pressure relief
DE4306691A1 (de) * 1993-03-04 1994-11-03 Abb Management Ag Ueberspannungsableiter
SE516123C2 (sv) * 1994-05-13 2001-11-19 Abb Ab Ventilavledare, metod för framställning av en sådan samt användning
SE504075C2 (sv) * 1994-08-29 1996-11-04 Asea Brown Boveri Ventilavledare
DE19622140A1 (de) 1996-06-01 1997-12-04 Asea Brown Boveri Überspannungsableiter
JP2002015904A (ja) * 2000-06-27 2002-01-18 Mitsubishi Electric Corp 避雷器
EP1447822B1 (fr) * 2003-02-12 2009-09-09 ABB Technology AG Composant active pour limiteur de surtension
DE102007057265A1 (de) * 2007-11-26 2009-05-28 Siemens Ag Isolatoranordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012098250A1 *

Also Published As

Publication number Publication date
MX2013008447A (es) 2013-12-06
DE102011009124A1 (de) 2012-07-26
WO2012098250A1 (fr) 2012-07-26
CN103430247A (zh) 2013-12-04
US20140218834A1 (en) 2014-08-07
BR112013018571A2 (pt) 2016-09-27

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