EP1466334A2 - Paratonnerre - Google Patents

Paratonnerre

Info

Publication number
EP1466334A2
EP1466334A2 EP03704226A EP03704226A EP1466334A2 EP 1466334 A2 EP1466334 A2 EP 1466334A2 EP 03704226 A EP03704226 A EP 03704226A EP 03704226 A EP03704226 A EP 03704226A EP 1466334 A2 EP1466334 A2 EP 1466334A2
Authority
EP
European Patent Office
Prior art keywords
pressure relief
core
surge arrester
relief arrangement
blocks
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.)
Granted
Application number
EP03704226A
Other languages
German (de)
English (en)
Other versions
EP1466334B1 (fr
Inventor
S. Tridelta Überspannungsableiter GmbH Bohrisch
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 EP1466334A2 publication Critical patent/EP1466334A2/fr
Application granted granted Critical
Publication of EP1466334B1 publication Critical patent/EP1466334B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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; Arresters
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure

Definitions

  • the invention relates to a surge arrester with varistor blocks, preferably with metal oxide varistor blocks, and a pressure relief arrangement for such a surge arrester.
  • EP-A-0 233 022 discloses a generic surge arrester which has a core with a stack of terminal blocks, varistor blocks and optionally heat sink blocks / spacer blocks, a sheath surrounding the core and a plastic outer housing provided with insulating bells.
  • Surge arresters are usually provided in energy supply networks in order to protect them from overvoltage due to a lightning strike or the like.
  • the varistor blocks are preferably cylindrical blocks made of sintered ceramic, so-called metal oxide varistors, in particular zinc oxide varistors.
  • varistor variable resistor
  • Zinc oxide varistors consist of n-doped zinc oxide ceramics with electrically conductive crystallites or "grains" and potential barriers at the grain boundaries. Up to a certain voltage, the "varistor voltage" U 0 , the varistor blocks have a high resistance because the potential barriers prevent the transport of the electrons and the voltage drops practically exclusively at the grain boundaries.
  • the potential barriers break down with the participation of "hot" end electrons and holes, and the ceramic varistor block, becomes electrically conductive.
  • the varistor voltage depends on the number of grain boundaries between the electrodes, ie on the thickness and size of the grains. Below the varistor voltage, in AC operation, such a zinc oxide varistor block behaves like a capacitor due to the grain boundary capacitance. The smaller U 0 , the greater its capacity.
  • the current / voltage characteristic is extremely non-linear with differential resistances the M ⁇ range slightly below the varistor voltage and in the m ⁇ range just above the varistor voltage.
  • the sheath of the surge arrester of EP-A-0 233 022 mentioned is made of a glass fiber reinforced plastic material which is firmly attached to the
  • the core breaks at the seams between the varistor blocks and these aluminum disks, which are referred to as contact disks, the hot, highly ionized gas occurs in a plane perpendicular to the Longitudinal direction of the Abieiter outwards, breaks through the sheath and the plastic outer housing and initiates an external short circuit. In this way, a complete destruction of the surge arrester by explosion is prevented.
  • DE 34 26 054 AI proposes to provide a "heat-conducting layer" between the shell and the core.
  • German laid-open specification DE 199 27 940 AI which goes back to the same applicant as the present application, proposes to arrange an additional adhesive tape around the core in the area of the aluminum contact disks, with which the glass fiber material of the casing does not crosslink, so that at least there There are predetermined breaking points.
  • the object of the invention is therefore to provide a surge arrester of the type mentioned above, which avoids this problem and in particular prevents an explosion-like bursting in the event of an overload.
  • the object is achieved by the invention described in the independent patent claims.
  • the dependent claims relate to further advantageous aspects of the invention.
  • the object is achieved by a pressure relief arrangement for a surge arrester, which has the shape of a flat disk with slits extending from the comb from one side. Furthermore, the object is achieved by a surge arrester, the core of which is equipped with slots or slots running in a plane perpendicular to the longitudinal direction of the arrester.
  • the surge arrester according to the invention contains: a core with one or more varistor blocks; an outer case surrounding the core; and a pressure relief assembly having a dual gas drain path from the interior of the core to the core periphery.
  • the pressure relief arrangement according to the invention for a surge arrester can have the form of a disk which has a passage for gas from the inside of the disk to its periphery and is located between two blocks.
  • FIG. 1 shows a surge arrester with the pressure relief arrangement according to the invention.
  • Fig. 2 shows a side view of the pressure relief arrangement.
  • Fig. 3 shows a plan view of the pressure relief arrangement.
  • Fig. 4 shows a pressure relief arrangement in the built-in
  • FIG. 5 shows a cross section through a surge arrester in the plane of a pressure relief arrangement.
  • An embodiment of a surge arrester according to the invention is shown in FIG. 1.
  • the surge arrester has two terminal blocks 2 at its opposite ends.
  • a stack of varistor blocks 1 and, optionally, heat sinks / spacer blocks 3 are arranged between these connection blocks 2.
  • a pressure relief arrangement 11 is provided, which is further below is described in detail. Distributed over the length of the surge arrester, there may be several pressure relief arrangements.
  • 'arrangement 11 is a plastic tape 15 wrapped around the core.
  • the core with the plastic band 15 is accommodated in a casing 5.
  • this " casing 5 is formed by the core with the plastic band 15 having a pre-impregnated material, such as a prepreg
  • Prepreg is wrapped, which is then cross-linked to the core at higher temperatures.
  • Prepreg is a generic term for a glass fiber reinforced plastic material.
  • Prepregs offer one of the most precise options for combining a reinforcement material with a resin matrix. This technology also allows the strongest and best matrix systems to be combined with all fiber types that are used today in polymer composite components.
  • the "module" thus produced is heated in an oven, so that the plastic material of the prepreg liquefies and cross-links with the outer surfaces of the blocks in the core.
  • the plastic tape 15 is selected so that no cross-linking of the prepreg with the plastic tape 15 occurs.
  • the plastic tape 15 prevents ' during production, when heating the liquefied plastic of the prepreg in the spaces between varistor blocks 1, terminal blocks 2 and heat sink / spacer blocks or in the pressure relief assembly 11.
  • the entire module is then introduced into an outer housing 7, which has insulating bells 9 formed thereon, or onto which such insulating bells 9 are later attached.
  • This outer housing 7 can be formed, for example, from a heat shrink material, as shown in German utility model DE-U-75 31 935 or British patent application GP-2073965-A.
  • a mechanically relaxable elastomer material 7 can also 'be formed, which is laid on the sleeve 5 out.
  • the outer housing 7 can be cast on or molded on site.
  • the pressure relief arrangement 11 has a flat disk 11 ', for example a 2 mm thick aluminum disk.
  • the disk 11 ' has the same diameter and the same outer shape as the varistor blocks 1, but is much thinner.
  • Comb-like recesses or cutouts 13 are provided in the disk 11 ', which extend parallel to one another and are open in one direction. These recesses form passageways that extend from the inside of the disc to its periphery.
  • the number and width of the comb-like recesses is not relevant to the invention, as long as both are good electrical ones
  • FIG. 4 shows a longitudinal section through the core with plastic band 15 and sheath 5 of a surge arrester according to the invention, it being shown in detail how two varistor blocks 1 with an intermediate pressure relief arrangement 11 in the form of a disk 11 'are contained in the core.
  • FIG. 5 shows a section in the plane perpendicular to the illustration from FIG. 4 through the pressure relief arrangement 11.
  • a sleeve 5 made of a prepreg material is wrapped around the entire core with varistor blocks 1, connection blocks 2, heat sink blocks / spacer blocks 2 and pressure relief arrangement 11, other plastic sleeves 5 can also be used for the core, for example in the form of shrink tubes or preformed plastic tubes, in which the core is received and cast.
  • contact disks known from the prior art for example made of aluminum, can be present between adjacent blocks of the core.
  • pressure relief arrangement 11 is shown here in connection with a surge arrester without a spark gap, it can also be used with surge arresters which are in addition to a stack
  • Varistor blocks 1 also have a spark gap.
  • other nonlinear blocks for example conventionally silicon carbide varistor blocks, are also possible.
  • Embodiment is designed as an aluminum disc 11 'with comb-like recesses.
  • other shapes are also possible, for example star-shaped cutouts or the like.
  • a passage path is formed from the inside of the core to its periphery, while at the same time maintaining good eclectic contact between the adjacent blocks.
  • a passage for gas from the inside of the core to the core circumference is also to be understood as such a passage which only opens above a predetermined pressure or temperature.
  • the pressure relief arrangement 11 of the invention can also be used in connection with surge arresters with a porcelain housing, in which case an air gap is provided between the core and the porcelain outer housing in the longitudinal direction of the surge arrester, into which the hot one. Plasma emerges from the core.
  • a membrane or a rupture disk is advantageously provided at both ends of the porcelain ceramic housing, through which the hot plasma can escape.
  • a plastic band 15 is provided in the embodiment according to the invention shown at the abutting points of adjacent blocks of the core or in the pressure relief arrangements, the invention is not restricted to this.
  • the entire core can be surrounded by such an adhesive tape, or the adhesive tape can be omitted entirely.
  • the sleeve 5 and / or the outer housing 7 can also be connected to the pressure relief device .
  • arrangement 11 corresponding points can be provided with additional predetermined breaking points, for example with perforations or partial perforations.
  • the outer housing 7 is applied directly to the core without a sheath 5 lying in between.

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 paratonnerre, ainsi qu'un système de décompression destiné à un paratonnerre. Selon l'invention, ce paratonnerre est constitué d'un noyau pourvu d'une pluralité de blocs, comprenant au moins un bloc varistor (1) et deux blocs de raccordement (3). A l'intérieur du noyau se trouve au moins un système de décompression (11) présentant la forme d'une voie de passage (13) de l'intérieur du noyau à sa périphérie, cette voie permettant à un gaz chaud fortement ionisé de sortir de l'intérieur du noyau vers l'extérieur dans un plan perpendiculaire à la direction longitudinale du paratonnerre. Le noyau est entouré d'un boîtier extérieur (7).
EP03704226A 2002-01-19 2003-01-17 Paratonnerre Expired - Lifetime EP1466334B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10201954 2002-01-19
DE10201954 2002-01-19
PCT/DE2003/000125 WO2003060926A2 (fr) 2002-01-19 2003-01-17 Paratonnerre

Publications (2)

Publication Number Publication Date
EP1466334A2 true EP1466334A2 (fr) 2004-10-13
EP1466334B1 EP1466334B1 (fr) 2012-07-04

Family

ID=7712556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03704226A Expired - Lifetime EP1466334B1 (fr) 2002-01-19 2003-01-17 Paratonnerre

Country Status (6)

Country Link
EP (1) EP1466334B1 (fr)
JP (1) JP2005515626A (fr)
BR (1) BR0302716A (fr)
DE (1) DE10241253B4 (fr)
PL (1) PL205709B1 (fr)
WO (1) WO2003060926A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008090735A1 (fr) 2007-01-22 2008-07-31 Swcc Showa Cable Systems Co., Ltd. Dispositif d'arrêt

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913056A (en) * 1974-07-01 1975-10-14 Gen Electric Varistors with patterned electrodes
CH664642A5 (de) * 1984-04-13 1988-03-15 Bbc Brown Boveri & Cie Ueberspannungsableiter.
CH666574A5 (de) * 1984-06-01 1988-07-29 Bbc Brown Boveri & Cie Ueberspannungsableiter.
JPH02101702A (ja) * 1988-10-11 1990-04-13 Mitsubishi Electric Corp 避雷装置
JPH02203501A (ja) * 1989-02-01 1990-08-13 Otowa Denki Kogyo Kk 避雷器
JPH0520947A (ja) * 1991-07-12 1993-01-29 Meidensha Corp ポリマーがいし形避雷器
JP3372006B2 (ja) * 1995-05-17 2003-01-27 富士電機株式会社 酸化亜鉛形避雷器
DE19927940B4 (de) * 1999-06-18 2011-08-18 Tridelta Überspannungsableiter GmbH, 07629 Kunststoff-Überspannungsableiter in modularer Bauweise und Verfahren zu seiner Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03060926A3 *

Also Published As

Publication number Publication date
WO2003060926A3 (fr) 2003-10-16
WO2003060926A2 (fr) 2003-07-24
DE10241253A1 (de) 2003-07-31
BR0302716A (pt) 2004-03-30
DE10241253B4 (de) 2008-04-24
EP1466334B1 (fr) 2012-07-04
JP2005515626A (ja) 2005-05-26
PL371196A1 (en) 2005-06-13
PL205709B1 (pl) 2010-05-31

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