EP1977433B1 - Coupe-circuit de surtension de type cage - Google Patents

Coupe-circuit de surtension de type cage Download PDF

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Publication number
EP1977433B1
EP1977433B1 EP06830505A EP06830505A EP1977433B1 EP 1977433 B1 EP1977433 B1 EP 1977433B1 EP 06830505 A EP06830505 A EP 06830505A EP 06830505 A EP06830505 A EP 06830505A EP 1977433 B1 EP1977433 B1 EP 1977433B1
Authority
EP
European Patent Office
Prior art keywords
surge arrester
hole
end fittings
reinforcing elements
rods
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
EP06830505A
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German (de)
English (en)
Other versions
EP1977433A1 (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

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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

Definitions

  • the invention relates to a surge arrester with cage design, as for example from the JP 62-149511 (Application number) is known.
  • Surge arresters are connected in power supply systems between live lines and ground to derive in the event of an overvoltage in the line this to ground and to protect other components of the power 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
  • a problem with such surge arresters is to securely fasten the reinforcing elements to the end fittings, so that the necessary strength is obtained even in the case of mechanical stresses which occur in the case of surge arresters mounted outdoors.
  • this problem is solved in that in the end fittings grooves in the stacking direction of the varistor blocks are provided, in which the reinforcing elements are inserted, and in that the end of the reinforcing elements is provided with a thread on which a nut is screwed, the in diameter is larger than the.Nut in the end fitting is, and so on Reinforcement - essentially by positive locking - holds.
  • 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 wedge tapering towards the stack center of the varistor blocks is brought between each reinforcing element and a correspondingly inclined surface of the end fitting, and both are held together by an external part of the end fitting under radial pressure.
  • 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.
  • the publication DE 19940939 shows a further surge arrester according to the preamble of the main claim.
  • 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.
  • the in Fig. 1 Cage design surge arresters shown include at least one varistor block 1.
  • varistor blocks known ceramic disks having a 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 adjust 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.
  • FIG Fig. 1 A stack formed by stacking such varistor blocks 1 and any metal blocks is shown in FIG Fig. 1 shown surge arrester between two end fittings 3 held.
  • the end fittings are usually formed of aluminum or stainless steel and designed so that they can be easily integrated into existing electrical installations or power grids, for example by one of the surge arrester outstanding central screw 4, which contacts well with the Varistorblöcken 1 well.
  • surge 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 open environment, are subject to significant bending moments due to the transmission of power through the electrical wires connected to them. 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 ropes 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 the 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.
  • through holes 11 extending in the stapling direction along the circumference of the end fitting are formed.
  • In the middle of the end fitting in another through hole 25 for the central screw 4, preferably with an internal thread formed.
  • the through-holes 11 deviate from the circular shape in cross-section at least in a subsection, preferably they are widened in the tangent direction on the side of the end fitting facing away from the varistor blocks.
  • Fig. 3 shows a cross section through an end fitting 3 along the line AA in Fig. 2 ,
  • a detail view of such a through-hole 11 is shown in a sectional view along the line BB Fig. 2 in Fig. 4 shown.
  • the through hole 11 has a first conical portion 11b and a second straight portion 11a.
  • the shape of the straight portion 11a 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 portion 11b 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 in order to split it.
  • the glass fiber reinforced rods at their end faces with a notch into which the wedges are driven during manufacture.
  • 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.
  • the second end fitting 3 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.
  • Glass fiber reinforced plastic rods 9 with a circular cross section are commercially available and inexpensive to manufacture.
  • FIG Fig. 5 A second embodiment of the invention is shown in FIG Fig. 5 shown.
  • the through hole 11 has an oval cross section throughout. However, the division of the through-hole 11 into a straight portion 11a and a conical portion 11b is maintained. The two portions 11a and 11b 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 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.

Landscapes

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

Claims (7)

  1. Coupe-circuit de surtension équipé de :
    au moins un bloc de varistor (1) ;
    deux armatures d'extrémité (3) qui sont disposées sur les faces opposées du bloc de varistor (1) ;
    au moins un élément de renfort (9) qui tient ensemble le bloc de varistor (1) et les armatures d'extrémité (3) ;
    au moins un élément d'ancrage (13) qui tient l'élément de renfort (9) dans un trou débouchant (11) d'au moins une des armatures d'extrémité (3),
    caractérisé en ce que
    l'élément d'ancrage (13) est une clavette qui fend l'élément de renfort (9) dans sa direction longitudinale et le presse contre les parois externes du trou débouchant (11).
  2. Coupe-circuit de surtension équipé de :
    au moins un bloc de varistor (1),
    deux armatures d'extrémité (3) qui sont disposées sur les faces opposées du bloc de varistor (1) ;
    au moins deux éléments de renfort (9) qui tiennent ensemble le bloc de varistor (1) et les armatures d'extrémité (3) ;
    au moins un élément d'ancrage (13) qui tient les éléments de renfort (9) dans un trou débouchant (11) d'au moins une des armatures d'extrémité (3) ;
    caractérisé en ce que
    au moins deux éléments de renfort (9) sont logés dans le trou débouchant (11) d'une armature terminale
    (3), l'élément d'ancrage (13) étant une clavette commune qui presse les éléments de renfort (9) dans un trou débouchant (11) l'un contre l'autre et contre les parois externes du trou débouchant (11).
  3. Coupe-circuit de surtension selon la revendication 1 ou 2, caractérisé en ce que
    le ou les blocs de varistor sont formés d'un oxyde métallique, de préférence du ZnO.
  4. Coupe-circuit de surtension selon l'une quelconque des revendications précédentes, caractérisé en ce que
    les armatures d'extrémité (3) sont formées d'un métal, de préférence de l'aluminium.
  5. Coupe-circuit de surtension selon l'une quelconque des revendications précédentes, caractérisé en ce que
    le coupe-circuit de surtension comporte un boîtier (5) avec des ailettes (7).
  6. Coupe-circuit de surtension selon l'une quelconque des revendications précédentes, caractérisé en ce que
    le boîtier externe (5) est formé par un moulage par injection ou par coulée avec de la silicone à faible viscosité.
  7. Coupe-circuit de surtension selon la revendication 2, caractérisé par deux éléments de renfort (9) qui sont logés dans un trou débouchant (11), les deux éléments de renfort (9) étant des éléments de renfort renforcés par des fibres de verre et un écartement étant présent sur toute la longueur du coupe-circuit de surtension entre les deux éléments de renfort (9).
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 EP1977433A1 (fr) 2008-10-08
EP1977433B1 true 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 (15)

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)
HK (1) HK1126311A1 (fr)
MX (1) MX2008009553A (fr)
RU (1) RU2370841C1 (fr)
WO (1) WO2007085325A1 (fr)
ZA (1) ZA200805316B (fr)

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
US7368262B2 (en) 2002-11-18 2008-05-06 Novozymes, Inc. Promoter variants for expressing genes in a fungal cell
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
US20220020513A1 (en) * 2020-07-14 2022-01-20 TE Connectivity Services Gmbh Surge Arresters and Related Assemblies and Methods

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Publication number Priority date Publication date Assignee Title
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
SE459294B (sv) * 1987-10-26 1989-06-19 Asea Ab Ventilavledare
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
DE19940939C1 (de) * 1999-08-23 2001-07-19 Siemens Ag Überspannungsableiter mit einem Verspannelement
JP2002175905A (ja) * 2000-12-07 2002-06-21 Mitsubishi Electric Corp 避雷器
JP4089262B2 (ja) * 2002-04-01 2008-05-28 株式会社明電舎 避雷器

Also Published As

Publication number Publication date
BRPI0621240A2 (pt) 2011-12-06
ZA200805316B (en) 2009-03-25
MX2008009553A (es) 2008-10-20
JP4865815B2 (ja) 2012-02-01
JP2009524261A (ja) 2009-06-25
RU2370841C1 (ru) 2009-10-20
US8064181B2 (en) 2011-11-22
KR20080080231A (ko) 2008-09-02
AU2006336936A1 (en) 2007-08-02
DE102006003576B4 (de) 2007-10-25
CN101336458A (zh) 2008-12-31
ATE433190T1 (de) 2009-06-15
DE502006003917D1 (de) 2009-07-16
EP1977433A1 (fr) 2008-10-08
US20090225487A1 (en) 2009-09-10
CN101336458B (zh) 2012-03-07
DE102006003576A1 (de) 2007-08-09
AU2006336936B2 (en) 2013-03-07
WO2007085325A1 (fr) 2007-08-02
HK1126311A1 (en) 2009-08-28
AR059151A1 (es) 2008-03-12
KR100995167B1 (ko) 2010-11-17

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