EP1977433A1 - Coupe-circuit de surtension de type cage - Google Patents

Coupe-circuit de surtension de type cage

Info

Publication number
EP1977433A1
EP1977433A1 EP06830505A EP06830505A EP1977433A1 EP 1977433 A1 EP1977433 A1 EP 1977433A1 EP 06830505 A EP06830505 A EP 06830505A EP 06830505 A EP06830505 A EP 06830505A EP 1977433 A1 EP1977433 A1 EP 1977433A1
Authority
EP
European Patent Office
Prior art keywords
surge arrester
hole
end fittings
fiber reinforced
glass fiber
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
EP06830505A
Other languages
German (de)
English (en)
Other versions
EP1977433B1 (fr
Inventor
Hartmut Klaube
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 EP1977433A1 publication Critical patent/EP1977433A1/fr
Application granted granted Critical
Publication of EP1977433B1 publication Critical patent/EP1977433B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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

Definitions

  • the invention relates to a surge arrester with cage design, as it is known for example from JP 62-149511 (application number).
  • Surge arresters are connected between power lines and ground in power systems to drain them to ground in the event of an overvoltage in the line, protecting other components of the grid.
  • Such a surge arrester contains a stack of varistor blocks, which is held between two connection elements or end fittings. This arrangement is accommodated in a housing.
  • GRP rods glass fiber reinforced plastic rods
  • reinforcing elements can be anchored to the end fittings of a surge arrester.
  • this document proposes to hold the reinforcing elements by a pin or a screw which extends perpendicular to the longitudinal direction of the reinforcing elements and is guided through a through hole by the rods. The pin or screw are then held in a corresponding recess or a threaded hole in the valve.
  • the said European patent also shows the possibility to fix the reinforcing elements with wedges in the end fitting.
  • a tapering in the direction of the stack center of the varistor blocks wedge between each reinforcing element and a corresponding inclined surface of the end fitting is brought and both together through an outer part of the end fitting under radial. Pressure held together.
  • the wedges are dragged by friction and ensure that the reinforcing elements frictionally or frictionally held between the associated wedge and the end fitting.
  • the reinforcing elements are preferably thin, in cross section circular segment-shaped strips of glass fiber reinforced plastic material, in such a way that the curvature of the glass fiber reinforced reinforcing element corresponds to the radius of curvature of the Varistorblöcke.
  • This design leads to difficulties in the formation of the insulating housing by casting or encapsulation, as easily remain between the glass fiber reinforced plastic element and the Varistorblöcken cavities. In such cavities, it may lead to partial discharges with the associated risk of damage to the insulation
  • the object of the invention is to provide a surge arrester with cage design, which avoids the disadvantages mentioned above and is suitable for low-cost mass production. According to the invention the object is achieved by a
  • FIG. 1 is an overall view of a generic surge arrester with partially wegquoem outer housing
  • FIG. 2 shows a plan view of the end fitting of the surge arrester according to the invention
  • FIG. Fig. 3 is a sectional view taken along the line A-A in Fig.
  • FIG. 4 shows a sectional view along the line BB from FIG. 2 with the wedge inserted
  • FIG. and Fig. 5 is a sectional view taken along line BB of Fig. 2 with inserted wedge according to a second embodiment.
  • the surge arrester with cage design shown in Fig. 1 includes at least one varistor block 1.
  • varistor blocks known ceramic discs 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 manufactured on the basis of zinc oxide (ZnO).
  • ZnO zinc oxide
  • the invention is not limited to such zinc oxide surge arresters, and other metal oxides as well as silicon carbide can be used for the varistor blocks, for example.
  • even more blocks, such as metal blocks or spark gap blocks may be included in the stack, so as to adapt the length of the surge arrester to the requirements of each use.
  • Common varistor blocks 1 are formed as circular cylinders with a diameter of for example 5 cm and a height of about 4 cm. On both sides of the varistor blocks 1 aluminum electrodes not shown in detail are applied to ensure a better contact. It is also customary, between the varistor blocks 1 to further improve the contact also not shown thin aluminum discs or spring elements to lay. A stack formed by stacking such varistor blocks 1 and any metal blocks is held between two end fittings 3 in the surge arrester shown in FIG. The end fittings are usually formed of aluminum or stainless steel and designed such that they easily into existing electrical
  • Installations or power grids can be integrated, for example, by an overvoltage arrester outstanding central screw 4, which contacts well with the Varistorblöcken 1 well.
  • overvoltage arresters are surrounded by an outer housing 5, often made of silicone.
  • the housing can be formed by spraying or pouring.
  • umbrellas 7 are formed on the outside of the housing.
  • Surge arresters when used in the free environment, are subject to significant bending moments due to the transmission of power through their associated electrical leads. It is therefore necessary to ensure that the contacting of the varistor blocks 1 with each other and to the end fittings is maintained even with greater mechanical stresses and edge breakage of the varistor blocks is avoided by an inner Verenciesr two adjacent Varistorblöcke.
  • glass fiber reinforced plastic rods or cables 9 are clamped as reinforcing elements between the two end fittings 3. These hold the Varistorblöcke 1 between the two end fittings 3 together under tensile stress.
  • spring elements are inserted into the stack of varistor blocks 1, so as to secure the contact even with temperature fluctuations or the like.
  • rods 9 the anchoring elements will be referred to as rods 9, without any limitation of the invention.
  • Fig. 2 shows a plan view of an end fitting of a surge arrester according to the invention.
  • the end fitting 3 is formed substantially as a circular-cylindrical block whose diameter is larger than that of the varistor blocks.
  • the stacking direction runs along the circumference of the end fitting
  • the through holes 11 deviate at least in a partial section in cross section from the circular shape, preferably they are in the tangent direction on the
  • FIG. 3 shows a cross section through an end fitting 3 along the line A-A in FIG. 2.
  • FIG. 4 A detail view of such a through-hole 11 is shown in a sectional view along the line B-B of FIG. 2 in FIG. 4.
  • the through hole 11 has a first conical portion IIb and a second straight portion IIa.
  • the shape of the straight portion IIa is formed in correspondence with the glass fiber reinforced rod 9 to accurately surround it.
  • the through hole in the region of the second portion is circular in cross section.
  • the first section IIb is conically widened in one direction.
  • an angle of inclination of the conical surfaces an angle of about 5 ° is preferred.
  • a glass fiber reinforced plastic rod 9 is received in the through hole 11, and a wedge 13 is driven into the rod 9 to split it.
  • the glass fiber reinforced rods In order to facilitate the insertion of the wedges, it is possible to provide the glass fiber reinforced rods at their end faces with a notch into which the wedges are driven during manufacture.
  • the inventive design of the end fittings 3 with their through holes 11 and the conical section IIb in cooperation with the wedge 13 and the glass fiber reinforced rods 9 ensures that the two halves of the glass fiber reinforced rod 9 in the area in which it is split, firmly against the obliquely extending side walls of the conical portion Hd are pressed. Under tensile load of glass fiber reinforced plastic rods 9, this spline connection continues to tighten and hold the glass fiber reinforced rod frictionally in the
  • an end fitting 3 In the manufacture of an end fitting 3 is first provided with glass fiber reinforced rods 9 and the wedges 13 used. In the "cage" thus formed, the varistor blocks 1 are inserted from the open side, wherein care must be taken that the varistor blocks are arranged centrally and a constant distance between their outer surfaces and the glass fiber reinforced plastic rods 9 is maintained. In the stack of Varistorblöcke one or more disc springs can be inserted. Likewise, control discs and aluminum blocks can adjust the length of the stack according to the intended use. After insertion of the varistor disks and the plate spring, the second end fitting 3 is applied, wherein the glass fiber reinforced rods 9 are guided through the corresponding through holes 11. Subsequently, while the entire stack is pressed together with external force, the wedges 13 are driven into the bars and the screws 4 are inserted through the end fittings 3 for contacting the varistor blocks 1.
  • the glass fiber reinforced rods according to the invention are preferably circular in cross section.
  • the rods 9 can be relatively easily and completely surrounded by the low-viscosity silicone, and the low-viscosity silicone also completely penetrates into the space between the glass-fiber-reinforced rods 9 and the outer surface of the varistor blocks 1.
  • the circular cross section offers the great advantage that there is only a very small area in which the distance between the bars 9 and the varistor blocks 1 is minimal. This small area can easily be filled with the help of common low-viscosity silicones and known injection or casting techniques.
  • FIG. 1 A second embodiment of the invention is shown in FIG.
  • the through hole 11 has an oval cross section throughout. However, the division of the through-hole 11 into a straight portion IIa and a conical portion IIb is maintained. The two sections IIa and IIb of the through hole of this
  • Embodiment differ only in the dimension of the longer axis of the oval.
  • two semicircular glass fiber reinforced plastic rods 9 are inserted into each through hole 11. Between two bars 9 of a through hole, a gap remains over the entire length of the overvoltage surge arrester.
  • the size of this gap can be about 5 mm, with larger or smaller gap widths are possible.
  • Such fiberglass reinforced rods 9 of semicircular cross section can be relatively easily formed by selecting a suitable tool in the manufacture of the rods by pulling.
  • the bars 9 and the associated wedge 13 are arranged so that the gap between the two bars 9 of a through-hole 11 runs radially with respect to the stack of the varistor blocks 1.
  • the low-viscosity silicone can penetrate better and more effectively in the space between the rods 9 and the Varistorblöcken 1.
  • the wedge 13 As in the first embodiment, it is possible to provide the wedge 13 with corresponding cutting edges also in this embodiment in order to increase the connection force between the wedge 13 and the glass fiber reinforced rods 9. Tests have also shown in this embodiment that the wedge connection of the glass fiber reinforced plastic rods 9 holds with the end fitting 3 to the breaking point of the glass fiber reinforced rods 9.
  • the formation in two semicircular glass fiber reinforced plastic rods 9 in advance, opposite to the gaps of a single rod 9 with a wedge according to the first embodiment, offers the advantage that damage to the rods 9 can be avoided.
  • the invention is not limited to these embodiments.
  • the glass fiber reinforced plastic rods 9 in two end fittings 3 in the same way to fix.
  • glass fiber reinforced rods 9 "ropes" can be used, which are performed at one of the end fittings for anchoring over a shoulder, and are attached only at the opposite end fitting with the anchoring elements of the invention.

Landscapes

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

Abstract

L'invention concerne un coupe-circuit de surtension de type cage comprenant au moins un bloc à varistance (1), deux garnitures terminales (3), un élément de renfort (9) qui maintient le bloc à varistance (1) contre les garnitures terminales (3) par une contrainte de traction et au moins un élément d'ancrage (13) qui maintient l'élément de renfort (9) dans un trou traversant (11) d'au moins une garniture terminale (3). L'élément d'ancrage (13) est, de préférence, une cale qui scinde l'élément de renfort (9) et le serre contre les parois externes du trou traversant (11). En variante, au moins deux éléments de renfort renforcés par des fibres de verre sont insérés dans le trou traversant (11) et une cale placée entre ces deux éléments de renfort assure un maintien par liaison de force des éléments de renfort dans la garniture terminale au niveau du traversant (11).
EP06830505A 2006-01-25 2006-12-11 Coupe-circuit de surtension de type cage Active EP1977433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006003576A DE102006003576B4 (de) 2006-01-25 2006-01-25 Überspannungsableiter mit Käfig-Design
PCT/EP2006/069532 WO2007085325A1 (fr) 2006-01-25 2006-12-11 Coupe-circuit de surtension de type cage

Publications (2)

Publication Number Publication Date
EP1977433A1 true EP1977433A1 (fr) 2008-10-08
EP1977433B1 EP1977433B1 (fr) 2009-06-03

Family

ID=37836987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830505A Active EP1977433B1 (fr) 2006-01-25 2006-12-11 Coupe-circuit de surtension de type cage

Country Status (14)

Country Link
US (1) US8064181B2 (fr)
EP (1) EP1977433B1 (fr)
JP (1) JP4865815B2 (fr)
KR (1) KR100995167B1 (fr)
CN (1) CN101336458B (fr)
AR (1) AR059151A1 (fr)
AT (1) ATE433190T1 (fr)
AU (1) AU2006336936B2 (fr)
BR (1) BRPI0621240A2 (fr)
DE (2) DE102006003576B4 (fr)
MX (1) MX2008009553A (fr)
RU (1) RU2370841C1 (fr)
WO (1) WO2007085325A1 (fr)
ZA (1) ZA200805316B (fr)

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Publication number Priority date Publication date Assignee Title
CN100480391C (zh) 2002-11-18 2009-04-22 诺维信股份有限公司 用于在真菌细胞中表达基因的启动子变体
DE102008048840A1 (de) 2007-10-12 2009-04-16 Tridelta Überspannungsableiter Gmbh Überspannungsableiter mit Käfig-Design
DE102008050487A1 (de) * 2008-10-01 2010-04-15 Siemens Aktiengesellschaft Elektrische Vorrichtung mit einem Haltegerüst
DE102009007067A1 (de) * 2009-01-29 2010-08-05 Siemens Aktiengesellschaft Impedanzanordnung mit einem ersten Armaturkörper
DE102009008463A1 (de) 2009-02-09 2010-08-12 Siemens Aktiengesellschaft Überspannungsableiteranordnung
JP5417060B2 (ja) * 2009-06-30 2014-02-12 株式会社東芝 ポリマー避雷器
DE102010015814B4 (de) * 2010-04-20 2014-08-07 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
DE102011078210A1 (de) * 2011-06-28 2013-01-03 Siemens Aktiengesellschaft Überspannungsableiter
EP2600358B1 (fr) * 2011-12-02 2014-04-30 ABB Technology AG Parafoudre
JP6137816B2 (ja) * 2012-11-30 2017-05-31 三菱電機株式会社 避雷器
DE102015009045B4 (de) * 2015-07-13 2021-03-25 TRIDELTA Meidensha GmbH Verfahren zur Herstellung eines Überspannungsableiters und Überspannungsableiter hergestellt gemäß dem Verfahren
DE102016206176A1 (de) * 2016-04-13 2017-10-19 Siemens Aktiengesellschaft Überspannungsableiter
RU2685405C1 (ru) * 2018-03-06 2019-04-17 Акционерное общество "Информационные спутниковые системы" имени академика М.Ф. Решетнёва" Способ регулировки значения потребляемого тока инициирующих устройств
DE102018203893A1 (de) * 2018-03-14 2019-09-19 Siemens Aktiengesellschaft Überspannungsableiter und Verfahren zur Montage eines Überspannungsableiters
CN110211755A (zh) * 2019-05-31 2019-09-06 国网湖南省电力有限公司 笼式避雷器绝缘筒和防爆避雷器
US12191058B2 (en) * 2020-07-14 2025-01-07 Te Connectivity Solutions Gmbh Surge arresters and related assemblies and methods
EP4369358A1 (fr) * 2022-11-14 2024-05-15 Hitachi Energy Ltd Module de limiteur de surtension et limiteur de surtension

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US4364854A (en) * 1980-12-31 1982-12-21 Phillips Petroleum Company Acid gelling aluminum phosphate from concentrated mass and catalyst containing same
JPS6127126Y2 (fr) * 1981-02-19 1986-08-13
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US5363266A (en) * 1992-06-18 1994-11-08 Raychem Corporation Electrical surge arrester
US5402100A (en) * 1993-12-06 1995-03-28 General Electric Company Overvoltage surge arrester with means for protecting its porcelain housing against rupture by arc-produced shocks
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Also Published As

Publication number Publication date
DE502006003917D1 (de) 2009-07-16
JP4865815B2 (ja) 2012-02-01
HK1126311A1 (en) 2009-08-28
EP1977433B1 (fr) 2009-06-03
AR059151A1 (es) 2008-03-12
DE102006003576A1 (de) 2007-08-09
CN101336458B (zh) 2012-03-07
US8064181B2 (en) 2011-11-22
JP2009524261A (ja) 2009-06-25
MX2008009553A (es) 2008-10-20
DE102006003576B4 (de) 2007-10-25
CN101336458A (zh) 2008-12-31
RU2370841C1 (ru) 2009-10-20
AU2006336936A1 (en) 2007-08-02
WO2007085325A1 (fr) 2007-08-02
US20090225487A1 (en) 2009-09-10
ZA200805316B (en) 2009-03-25
AU2006336936B2 (en) 2013-03-07
KR100995167B1 (ko) 2010-11-17
ATE433190T1 (de) 2009-06-15
KR20080080231A (ko) 2008-09-02
BRPI0621240A2 (pt) 2011-12-06

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