EP1410407B1 - Überspannungsableiter zum einsatz in energieübertragungsnetzen - Google Patents
Überspannungsableiter zum einsatz in energieübertragungsnetzen Download PDFInfo
- Publication number
- EP1410407B1 EP1410407B1 EP02753027A EP02753027A EP1410407B1 EP 1410407 B1 EP1410407 B1 EP 1410407B1 EP 02753027 A EP02753027 A EP 02753027A EP 02753027 A EP02753027 A EP 02753027A EP 1410407 B1 EP1410407 B1 EP 1410407B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- surge arrester
- varistor
- varistor block
- block
- 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
Links
Images
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
-
- 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 for use in energy transmission networks with a Ableitstrombahn having at least one varistor block, wherein the varistor block has two contact areas and a cladding region.
- a surge arrester of this type a plurality of Ableitstrombahn the surge arrester forming varistor blocks are arranged one behind the other and clamped between two end fittings.
- surge arresters are used in energy transmission networks of different voltage levels.
- an insulating material is arranged between the end fittings.
- the varistor blocks are wrapped with non-conductive fibers. - Internal errors of such Varistorblöcke can lead to the occurrence of arcs.
- the non-conductive fibers In order to let emerge from the interior of the surge arrester, the hot gases resulting from the ignition of the arc, openings are provided between the non-conductive fibers.
- the non-conductive fibers mechanically hold the varistor blocks together, so that the fragments formed in the event of a fault when the varistor blocks burst are held together (EP 0 335 480 A2).
- the present invention is based on the object, a Surge arrester of the type mentioned initially in such a way, that the risk of bursting of the varistor blocks at a occurring error is reduced.
- a surge arrester of the beginning mentioned type solved in that in at least one Part of the cladding region of the at least one varistor block a coating of a thermistor material or is arranged from a pyrotechnic substance, the when a critical temperature of the varistor block is exceeded the initiation of an electrical rollover serves.
- a material for the coating can advantageously a thermistor material be used.
- a material for the coating is reduced at the critical temperature of the varistor blocks its electrical resistance to such an extent that the Overstrip resistance of the arrester distance is exceeded and so an electric flashover is initiated.
- Such a Thermistor material can be used with the same manufacturing measures produce, as in the production of Varistor blocks are common, namely sintering and glazing. The application of the coating can thus in the for the production of Varistorblöcken usual manufacturing steps be easily integrated.
- Pyrotechnic substances based on nitrocellulose can be used in a simple manner on the jacket region of a varistor block muster.
- the coating is a paste-like solution of nitrocellulose in acetone.
- the solvent evaporates after the Applying and the nitrocellulose is sufficiently durable fixed on the lateral surface.
- the ignition temperature of nitrocellulose corresponds approximately to the critical temperature of the varistor blocks, so that before overloading the varistor blocks the desired outer rollover occurs.
- nitrocellulose is also inexpensive to procure.
- an advantageous embodiment of the invention provides that the coating - regardless of the material chosen in each case - extends along a surface line of at least one varistor block.
- the layer can be applied to the outer surface of the Varistorblöcke or embedded in a groove. If a groove is provided in the jacket region, in which the coating is arranged, then it is possible to assign the coating to a varistor block without changing its outer contour.
- the layer is annular is.
- annular layer is possibly also along with one a generatrix extending layer combined. - One However, annular arrangement of the layer has a higher Consumption of coating material result. In the extreme Case can be the entire lateral surface of a varistor block be coated.
- the surge arrester shown in section in FIG 1 has a first end fitting 2 and a second end fitting 3 on. Between the end fittings 2 and 3 is an off three Varistorblöcken 4a, 4b, 4c existing Ableitstrombahn arranged. For electrical contacting and mechanical Holder of the surge arrester 1 is at the first end fitting a first terminal bolt 5 and at the second End fitting a second connecting bolt 6 is arranged.
- the three Varistor blocks 4a, 4b, 4c are for mechanical stabilization clamped with insulating rods 7.
- the surge arrester 1 an insulating material 8 on.
- a coating 9 of a Material arranged when exceeding a critical Temperature of the varistor blocks initiating an electrical Overlap serves.
- the coating 9 may, for example made of a heat-conducting material or a pyrotechnic Substance exist.
- the mode of action of the coating 9 is intended to be exemplary of a variant of the Layer can be explained as a pyrotechnic coating.
- the surge arrester 1a according to FIG. 2 has in principle the same structure as the surge arrester shown in Figure 1 1 on.
- the varistor blocks 4a, 4b, 4c are only the coatings 9a, 9b, 9c annularly circulating arranged.
- the application of the pyrotechnic substance can be done in different variants. As already mentions the pyrotechnic substance as a paste-like solution be used. In this case, the pyrotechnic Substance in the form of a band-like structure on the respective Varistor block wound up.
- a single varistor block 4d is longitudinal a generatrix provided with a groove 10. This groove is filled with the material, which exceeds a critical temperature initiating an electrical rollover serves.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Description
mit einer Ableitstrombahn, die wenigstens einen Varistorblock aufweist, wobei der Varistorblock zwei Kontaktbereiche und einen Mantelbereich aufweist. - Bei einem bekannten Überspannungsableiter dieser Art sind mehrere die Ableitstrombahn des Überspannungsableiters bildende Varistorblöcke hintereinander angeordnet und zwischen zwei Endarmaturen eingespannt. Derartige Überspannungsableiter werden in Energieübertragungsnetzen verschiedener Spannungsebenen eingesetzt. Zwischen den Endarmaturen, die Varistorblöcke mantelseitig umgebend, ist ein Isolierstoffgehäuse angeordnet. Die Varistorblöcke sind mit nichtleitenden Fasern umwickelt. - Innere Fehler solcher Varistorblöcke können zum Auftreten von Lichtbögen führen. Um die mit dem Zünden des Lichtbogens entstehenden heißen Gase aus dem Innern des Überspannungsableiters heraustreten zu lassen, sind zwischen den nichtleitenden Fasern Öffnungen vorgesehen. Darüber hinaus halten die nicht leitenden Fasern die Varistorblöcke mechanisch zusammen, so dass die im Fehlerfall bei einem Bersten der Varistorblöcke entstehenden Bruchstücke zusammengehalten werden (EP 0 335 480 A2).
Dabei kann die Schicht auf die äußere Oberfläche der Varistorblöcke aufgebracht oder in eine Nut eingelassen sein. Ist im Mantelbereich eine Nut vorgesehen, in welcher die Beschichtung angeordnet wird, so ist es möglich, die Beschichtung einem Varistorblock zuzuordnen ohne dessen äußere Kontur zu verändern.
- Figur 1
- einen Schnitt durch einen Überspannungsableiter mit einer längs einer Mantellinie verlaufenden Schicht, die
- Figur 2
- einen Schnitt durch einen Überspannungsableiter mit mehreren ringförmig um die Ableitstrombahn verlaufenden Schichten und die
- Figur 3
- eine Ansicht eines einzelnen Varistorblockes mit einer Nut.
Claims (5)
- Überspannungsableiter (1, 1a) zum Einsatz in elektrischen Energieübertragungsnetzen mit einer Ableitstrombahn, die wenigstens einen Varistorblock (4a, 4b, 4c) aufweist, wobei der Varistorblock (4a, 4b, 4c) zwei Kontaktbereiche und einen Mantelbereich aufweist,
dadurch gekennzeichnet, dass
in wenigstens einem Teilbereich des Mantelbereiches des wenigstens einen Varistorblockes (4a, 4b, 4c) eine Beschichtung (9, 9a, 9b, 9c) aus einem Heißleiterwerkstoff oder aus einer pyrotechnischen Substanz angeordnet ist, die bei Überschreitung einer kritischen Temperatur des Varistorblockes dem Einleiten eines elektrischen Überschlages dient. - Überspannungsableiter (1, 1a) nach Anspruch 1,
dadurch gekennzeichnet, dass
die Beschichtung (9, 9a, 9b, 9c) aus einer Substanz auf der Basis von Nitrozellulose besteht. - Überspannungsableiter (1, 1a) nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass
die Beschichtung (9) sich längs einer Mantellinie wenigstens eines Varistorblockes erstreckt. - Überspannungsableiter (1, 1a) nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass
die Beschichtung (9a, 9b, 9c) ringförmig ausgebildet ist. - Überspannungsableiter (1, 1a) nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass
die Beschichtung (9) in einer Nut angeordnet ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10136617A DE10136617C1 (de) | 2001-07-17 | 2001-07-17 | Überspannungsableiter zum Einsatz in Energieübertragungsnetzen |
| DE10136617 | 2001-07-17 | ||
| PCT/DE2002/002636 WO2003009310A2 (de) | 2001-07-17 | 2002-07-16 | Überspannungsableiter zum einsatz in energieübertragungsnetzen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1410407A2 EP1410407A2 (de) | 2004-04-21 |
| EP1410407B1 true EP1410407B1 (de) | 2005-05-04 |
Family
ID=7693294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02753027A Expired - Lifetime EP1410407B1 (de) | 2001-07-17 | 2002-07-16 | Überspannungsableiter zum einsatz in energieübertragungsnetzen |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7120001B2 (de) |
| EP (1) | EP1410407B1 (de) |
| JP (1) | JP2004535683A (de) |
| CN (1) | CN1326161C (de) |
| BR (1) | BRPI0211168B1 (de) |
| DE (2) | DE10136617C1 (de) |
| RU (1) | RU2292096C2 (de) |
| WO (1) | WO2003009310A2 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10146947C5 (de) * | 2001-09-24 | 2009-10-08 | Epcos Ag | Elektrisches Bauelement |
| KR100973058B1 (ko) * | 2008-04-23 | 2010-07-29 | 한국세라믹기술원 | 써미스터-바리스터 복합칩 소자 및 그 제조방법 |
| SI23040B (en) * | 2009-04-29 | 2018-06-29 | Crdce D.O.O. | A varistor with a defined weak point in the structure |
| DE102009053145A1 (de) * | 2009-11-05 | 2011-05-12 | Phoenix Contact Gmbh & Co. Kg | Überspannungsschutzelement |
| RU2705203C1 (ru) * | 2016-09-28 | 2019-11-06 | Абб Швайц Аг | Импульсный разрядник и способ его изготовления |
| DE102017221783A1 (de) * | 2017-12-04 | 2019-06-06 | Siemens Aktiengesellschaft | Anordnung und Verfahren zum Schalten hoher Spannungen mit einer Schalteinrichtung und genau einem Widerstandsstapel |
| EP3505943B1 (de) * | 2017-12-29 | 2020-05-20 | Siemens Aktiengesellschaft | Nachweisen einer elektrischen überspannung |
| CN112071534A (zh) * | 2020-09-03 | 2020-12-11 | 合肥众甫工业技术有限公司 | 一种基于波纹管缓冲组件的过电压保护器 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159820B1 (de) * | 1984-03-29 | 1988-12-07 | Kabushiki Kaisha Toshiba | Zink-Oxidspannungsabhängiger, nichtlinearer Widerstand |
| US4656555A (en) | 1984-12-14 | 1987-04-07 | Harvey Hubbell Incorporated | Filament wrapped electrical assemblies and method of making same |
| FR2611974B1 (fr) * | 1987-03-04 | 1993-09-24 | Pendar Electronique | Composition de revetement des electrodes d'un parafoudre |
| CA1334990C (en) * | 1988-03-31 | 1995-03-28 | John D. Sakich | Modular electrical assemblies with pressure relief |
| SU1739391A1 (ru) * | 1989-10-20 | 1992-06-07 | Научно-Исследовательский, Проектно-Конструкторский И Технологический Институт Научно-Производственного Объединения "Электрофарфор" | Устройство дл защиты от перенапр жений и способ его изготовлени |
| US5565838A (en) * | 1992-05-28 | 1996-10-15 | Avx Corporation | Varistors with sputtered terminations |
| CN1046589C (zh) * | 1995-01-24 | 1999-11-17 | 深圳宝安银星电力电子公司 | 金属氧化物避雷器 |
| US5721664A (en) * | 1996-12-16 | 1998-02-24 | Raychem Corporation | Surge arrester |
| US6392861B1 (en) * | 1999-09-15 | 2002-05-21 | Joslyn Manufacturing Co. | Surge arrester having disconnector housed by mounting bracket and end cap |
| DE10000617A1 (de) * | 2000-01-10 | 2001-07-12 | Abb Hochspannungstechnik Ag | Ueberspannungsableiter |
| US6778374B2 (en) * | 2002-01-04 | 2004-08-17 | Hubbell Incorporated | Reinforced arrester housing |
-
2001
- 2001-07-17 DE DE10136617A patent/DE10136617C1/de not_active Expired - Fee Related
-
2002
- 2002-07-16 EP EP02753027A patent/EP1410407B1/de not_active Expired - Lifetime
- 2002-07-16 US US10/484,103 patent/US7120001B2/en not_active Expired - Fee Related
- 2002-07-16 CN CNB028119819A patent/CN1326161C/zh not_active Expired - Fee Related
- 2002-07-16 DE DE50203021T patent/DE50203021D1/de not_active Expired - Lifetime
- 2002-07-16 RU RU2004104458/09A patent/RU2292096C2/ru not_active IP Right Cessation
- 2002-07-16 WO PCT/DE2002/002636 patent/WO2003009310A2/de not_active Ceased
- 2002-07-16 JP JP2003514567A patent/JP2004535683A/ja active Pending
- 2002-07-16 BR BRPI0211168A patent/BRPI0211168B1/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004535683A (ja) | 2004-11-25 |
| US7120001B2 (en) | 2006-10-10 |
| BRPI0211168B1 (pt) | 2016-01-05 |
| RU2004104458A (ru) | 2005-07-10 |
| WO2003009310A2 (de) | 2003-01-30 |
| WO2003009310A3 (de) | 2003-08-07 |
| US20040207969A1 (en) | 2004-10-21 |
| EP1410407A2 (de) | 2004-04-21 |
| CN1528001A (zh) | 2004-09-08 |
| RU2292096C2 (ru) | 2007-01-20 |
| DE50203021D1 (de) | 2005-06-09 |
| BR0211168A (pt) | 2004-08-10 |
| CN1326161C (zh) | 2007-07-11 |
| DE10136617C1 (de) | 2002-10-10 |
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