EP0702841B1 - Überspannungsableiter - Google Patents

Überspannungsableiter Download PDF

Info

Publication number
EP0702841B1
EP0702841B1 EP94916141A EP94916141A EP0702841B1 EP 0702841 B1 EP0702841 B1 EP 0702841B1 EP 94916141 A EP94916141 A EP 94916141A EP 94916141 A EP94916141 A EP 94916141A EP 0702841 B1 EP0702841 B1 EP 0702841B1
Authority
EP
European Patent Office
Prior art keywords
housing
surge arrester
function block
electrical surge
arrester according
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.)
Expired - Lifetime
Application number
EP94916141A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0702841A1 (de
Inventor
Johannes Kirch
Volker Hinrichsen
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0702841A1 publication Critical patent/EP0702841A1/de
Application granted granted Critical
Publication of EP0702841B1 publication Critical patent/EP0702841B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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; Arresters

Definitions

  • the invention relates to an electrical surge arrester, in particular for medium voltage, with a functional block and a surrounding elastically expandable housing made of an insulating material, in which at least one reinforcing element for mechanical reinforcement is embedded separately from the functional block.
  • a surge arrester with an elastically expandable housing is known for example from E 0 233 022.
  • a surge arrester is described, in which the functional block is first firmly surrounded with a fiber-reinforced resin and the blank thus produced is introduced into an elastic sleeve. After use, the functional block can hardly be freed from the resin that is firmly attached to it, so that great problems arise with environmentally friendly disposal (cf. specialist article "Disposal and recycling of plastic waste", Bulletin SEV / VSE (1992) 15, July 31).
  • An electrical surge arrester with a functional block and an elastic housing made of an insulating material is known from EP 0 545 038 A1. Reinforcing elements in the form of plastic strips or plastic strips are cast into the insulating material housing. It is therefore difficult to separate the reinforcing elements from the housing of the surge arrester when the arrester is disposed of.
  • the invention is therefore based on the object of providing an electrical surge arrester which is easy to disassemble and which is made of different materials Have existing parts separated as easily as possible for recycling purposes.
  • the object is achieved in that the reinforcing element (s) or both the reinforcing element (s) and the functional block are non-positively held by elastic expansion of the insulating material housing and are / are not integrally connected to it.
  • the functional block consisting of the actual diverter elements is, if appropriate, pressed into the housing, like the reinforcing elements, with an elastic expansion of the housing walls and held by the elastic pressure of the housing walls.
  • the function block can be easily removed from the housing by elastic expansion of the housing walls.
  • the functional block which normally consists of a metal oxide and metal parts, can be disposed of or reused separately from the housing, which consists of an insulating material. Assembly during the manufacture of the arrester is also simplified by simply inserting the functional block into the housing.
  • the reinforcing element is functionally and spatially separated from the functional block of the arrester and is embedded in the housing body.
  • the functional block itself does not need any mechanical reinforcement, for example in the form of a fiber-reinforced plastic layer, since the metal oxide disks can be glued to one another, for example.
  • the housing or the arrester as a whole is given the required mechanical stability by the reinforcing element (s).
  • the housing consists of an elastic cast body.
  • Such a body is easy and inexpensive to manufacture from elastic material.
  • the cast body can be designed to be resilient either through the properties of the material from which it is made or through a specific shape, for example the shape of a bellows.
  • the housing advantageously has a first recess for receiving the functional block and a second recess for receiving a reinforcing body.
  • Both the functional block and the reinforcing element (s) can be pushed axially out of the corresponding recess for separate disposal.
  • the housing has shielding ribs on its outside.
  • This known measure for extending the creepage distances on the outside of the housing of an arrester can advantageously be taken in that the shielding ribs are integrated in the housing body.
  • a further advantageous embodiment of the invention provides that the housing consists of an optionally filled silicone rubber or ethylene-propylene-diene monomer or a mixture of both substances.
  • Silicone rubber and EPDM have excellent mechanical and in particular also dielectric properties and are particularly suitable for use in a surge arrester according to the invention because of their long-term stability, good environmental compatibility and simple processability.
  • the invention can also be advantageously configured in that the spaces between the functional block and the housing are largely filled by a partially plastically deformable elastic mass.
  • a partially plastically deformable elastic mass can consist, for example, of a material based on silicone.
  • a further advantageous embodiment of the invention provides that the functional block is connected at least at one of its ends to a connection contact by a flexible electrical conductor, in particular a metal spring.
  • the surge arrester has a functional block 1 which consists of metal oxide disks 2, 3 which are bonded to one another.
  • the functional block 1 is arranged in a recess 4 of a silicone rubber casting 5.
  • the recess 4 is smaller in diameter than the diameter of the functional block 1, so that the cast body 5 is elastically expanded when the functional block 1 is inserted and holds the functional block 1 in a force-locking manner.
  • the functional block 1 is inserted into the recess 4 of the cast body 5 by expanding the cast body 5 by suitable mechanical means.
  • the cast body 5 also has a recess 6 for a reinforcing body 7, which is also held elastically in the recess 6 of the expanded cast body 5.
  • the reinforcing element 7, which is formed, for example, from a glass fiber-reinforced plastic rod, holds two metallic connecting plates 8, 9, between which the housing 5 of the surge arrester is clamped.
  • the connection plates 8, 9 each carry a connecting bolt 10, 11 for making electrical contact with the surge arrester.
  • the surge arrester can be oval in cross-section as shown in Fig. 2, which results in good dielectric strength.
  • the cross section can also be designed as shown in Figure 3, resulting in a minimal material consumption for the housing.
  • the surge arrester can also be constructed in such a way that (see FIG. 4) the function block is mechanically and elastically coupled to the connection plates 8, 9 via spiral springs 13, 14 in order to avoid high mechanical loads on the function block 1 during assembly and operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Dowels (AREA)
  • Insulators (AREA)
EP94916141A 1993-06-11 1994-05-26 Überspannungsableiter Expired - Lifetime EP0702841B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4319986 1993-06-11
DE4319986A DE4319986A1 (de) 1993-06-11 1993-06-11 Überspannungsableiter
PCT/DE1994/000607 WO1994029888A1 (de) 1993-06-11 1994-05-26 Überspannungsableiter

Publications (2)

Publication Number Publication Date
EP0702841A1 EP0702841A1 (de) 1996-03-27
EP0702841B1 true EP0702841B1 (de) 1997-03-19

Family

ID=6490491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916141A Expired - Lifetime EP0702841B1 (de) 1993-06-11 1994-05-26 Überspannungsableiter

Country Status (7)

Country Link
EP (1) EP0702841B1 (da)
AT (1) ATE150579T1 (da)
DE (2) DE4319986A1 (da)
DK (1) DK0702841T3 (da)
ES (1) ES2102226T3 (da)
NO (1) NO955001D0 (da)
WO (1) WO1994029888A1 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10020129C1 (de) * 2000-04-14 2001-11-15 Siemens Ag Baugruppe mit Überspannungsableiter für eine Hochspannungsanlage
DE102005017083A1 (de) 2005-04-08 2006-10-19 Siemens Ag Überspannungsableiter mit einem Ableitelement
DE102007057265A1 (de) * 2007-11-26 2009-05-28 Siemens Ag Isolatoranordnung
CA2746239A1 (en) 2008-12-16 2010-07-01 Richard A. Lundgard A coating composition comprising polymer encapsulated metal oxide opacifying pigments and a process of producing the same

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757659A (fr) * 1969-10-17 1971-04-16 Raychem Corp Isolants haute tension
US3965065A (en) * 1975-09-08 1976-06-22 Dow Corning Corporation Method of improving the electrical properties of organopolysiloxane elastomers and compositions therefor
CA1137159A (en) * 1979-04-23 1982-12-07 John P. Dupont Cap seal for resilient electrical housing
IT1195773B (it) * 1980-04-16 1988-10-27 Dow Corning Ltd Composizioni organopolisilossaniche formatrici di elastomeri
CH666574A5 (de) * 1984-06-01 1988-07-29 Bbc Brown Boveri & Cie Ueberspannungsableiter.
DE3508030A1 (de) * 1985-02-07 1986-08-07 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Verfahren zur herstellung eines ueberspannungsableiters unter verwendung eines aktiven widerstandskoerpers aus einem spannungsabhaengigen widerstandsmaterial auf zno-basis und danach hergestellter ueberspannungsableiter
GB8527548D0 (en) * 1985-11-08 1985-12-11 Raychem Gmbh Electrical equipment
DK173921B1 (da) * 1986-01-29 2002-02-18 Bowthorpe Ind Ltd Elektrisk overspændingsafledningsindretning, fremgangsmåde og apparat til fremstilling samt en anvendelse af en sådan indretning
ES2022282B3 (es) * 1986-12-12 1991-12-01 Sediver Soc Europeenne D'isolateurs En Verre Et Composite Proceso de fabricacion de un pararrayos y pararrayos obtenido por este procedimiento
JPS63312602A (ja) * 1987-06-16 1988-12-21 Ngk Insulators Ltd 避雷器ユニット
SU1578159A1 (ru) * 1987-11-13 1990-07-15 Предприятие П/Я Г-4430 Электроизол ционна композици
JPH01163925A (ja) * 1987-12-18 1989-06-28 Ngk Insulators Ltd 避雷碍子
JPH02148626A (ja) * 1988-11-30 1990-06-07 Meidensha Corp 碍管
CA2038720A1 (en) * 1990-04-02 1991-10-03 Takeshi Kawamura Arrester
SE466176B (sv) * 1990-05-08 1992-01-07 Asea Brown Boveri Ventilavledare med ett isolatorhoelje i vilket dragstaenger aer anordnade
JP2837978B2 (ja) * 1991-08-02 1998-12-16 日本碍子株式会社 避雷碍子及びその製造方法
CH682858A5 (de) * 1991-12-04 1993-11-30 Asea Brown Boveri Ueberspannungsableiter.

Also Published As

Publication number Publication date
ES2102226T3 (es) 1997-07-16
WO1994029888A1 (de) 1994-12-22
EP0702841A1 (de) 1996-03-27
NO955001L (no) 1995-12-08
ATE150579T1 (de) 1997-04-15
DK0702841T3 (da) 1997-10-13
NO955001D0 (no) 1995-12-08
DE59402163D1 (de) 1997-04-24
DE4319986A1 (de) 1994-12-15

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