EP0196370B1 - Méthode de fabrication d'un dériveur de surtension utilisant un varistor à base de ZnO et dériveur de surtension ainsi fabriqué - Google Patents
Méthode de fabrication d'un dériveur de surtension utilisant un varistor à base de ZnO et dériveur de surtension ainsi fabriqué Download PDFInfo
- Publication number
- EP0196370B1 EP0196370B1 EP85115554A EP85115554A EP0196370B1 EP 0196370 B1 EP0196370 B1 EP 0196370B1 EP 85115554 A EP85115554 A EP 85115554A EP 85115554 A EP85115554 A EP 85115554A EP 0196370 B1 EP0196370 B1 EP 0196370B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resistor core
- insulator
- zno
- lightning arrester
- monolithic
- 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
- H01C7/105—Varistor cores
- H01C7/108—Metal oxide
- H01C7/112—ZnO type
-
- 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
- H01C7/102—Varistor boundary, e.g. surface layers
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49082—Resistor making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49082—Resistor making
- Y10T29/49087—Resistor making with envelope or housing
Definitions
- the invention is based on a method for producing a surge arrester on ZnO-8as ⁇ s and on a surge arrester according to the preamble of claim 4, as is known from US Pat. No. 4,069,465.
- the ZnO-based resistance material plays an outstanding role here.
- the conventional constructions generally use - from certain voltages upwards - stack-like bodies composed of individual disks made of voltage-dependent sintered resistance material (varistors). Such bodies are known from numerous publications (see, for example, US-A-4,335,417, DE-A-2,934,832, CH-A-626,758).
- the height of the discs used is limited (e.g. to 60 mm) and the height to diameter ratio is generally less than 1.
- the stack-like structure of a conventional surge arrester is - especially at higher voltages and powers - expensive and complex and also includes additional risks due to the numerous internal contact areas.
- a hollow cylindrical varistor with an active resistor body made of a voltage-dependent ZnO-based resistor material, an insulating body and connectors for electrical connections, in which the resistor body consists of a compact monolithic workpiece with a ratio of height to diameter > 1 exists.
- the known varistor has control electrodes which cover the outer surface of the resistance body except for a narrow gap.
- the invention has for its object to provide a method for manufacturing and a simplified construction of a surge arrester, which is not composed of individual disks and makes a self-supporting, stable insulating body as a housing unnecessary.
- expensive, brittle ceramic insulating housings (porcelain) should possibly be avoided.
- the method according to the invention is characterized in that it enables the production of surge arresters in an economical manner and without adversely affecting the mechanical and electrical properties.
- the surge arresters produced in this way according to the invention are simple and expediently constructed and, despite extremely low manufacturing costs, are distinguished by high operational reliability.
- Fig. 1 the method is shown as a flow diagram in block form.
- the individual points require no further explanation.
- the mass which is in the form of granules and is filled into an elastic hollow mold (e.g. made of silicone rubber), can be pressed by the cold isostatic process (wet die) or more advantageously by the two-dimensional radial process (dry die).
- Fig. 2 shows a simplified longitudinal section by means of a surge arrester with a monolithic, essentially cylindrical active resistance body and with an insulating body designed as a jacket.
- 1 shows the resistance body (varistor), which essentially has a smooth, cylindrical outer surface.
- the resistance body 1 is made slightly corrugated at the ends in order to create better conditions for adhesion in the adhesive joint 7.
- 2 is the insulating body designed as a jacket, which advantageously consists of a castable plastic such as epoxy resin, polymer concrete, silicone material etc.
- a shrink tube or another suitable covering or in general any suitable coating by an insulating material can also be used for this. Glazing or painting are also suitable.
- 3, the metallized end face of the resistance body 1, 4 is the corresponding contact spring for the high-voltage electrode 5 or earth electrode 6.
- an insulating body 2 is shown with a smooth cylindrical outer wall for the interior installation of the arrester, while the right half relates to a version with ribs or screens for outdoor installation.
- FIG. 3 shows a longitudinal section through an overvoltage arrester with a monolithic, externally ribbed resistance body.
- the insulating body 2 is listed as an additionally applied, comparatively thin coating of approximately constant thickness. All reference numerals correspond to those in FIG. 2.
- the resistance body 1 has a central bore 8, in which the threaded pull rod 9 made of insulating material is located.
- the electrodes 5 and 6 are pressed firmly onto the end faces of the resistance body 1 by means of the latter. All other reference numerals correspond to those in FIG. 2.
- An overvoltage arrester was manufactured on the basis of ZnO, the active resistance body 1 of which had the following composition:
- the slurry was then converted into a free-flowing, dry granulate in a spray dryer with counter-air flow.
- the average size of the grains produced was about 100 pm, the remaining moisture was about 2% by weight.
- the compact was removed from the mold and sintered at a temperature of 1200 ° C for 2 hours.
- the organic binder was burned while passing through the temperature range of 200 to 600 ° C and the shrinkage was carried out in a short time in the range of 900 to 1050 ° C without deformation of the body.
- the sintered resistance body 1 had a diameter of 35 mm with a length of 240 mm and a density of 5500 kg / m 3 (98% of the theoretical value).
- the monolithic sintered body was contacted by flame spraying its end faces (3) with aluminum once.
- the electrical transition was carried out by means of pressure contacts (contact springs 4).
- the finished contacted sintered body was now provided with a 6 mm thick layer of a temperature-resistant organic material, in the present case an epoxy resin.
- This hollow cylindrical, smooth jacket for the interior installation of the arrester was produced by encapsulating the resistance body 1.
- the jacket can be provided with screens or ribs to enlarge the surface.
- An overvoltage arrester with a resistance body 1 of the same dimensions and composition as in example I was produced.
- the process steps of mixing, grinding and drying the starting materials correspond to those of Example I.
- the compact was then removed from the mold and sintered at a temperature of 1200 ° C. for 2 hours in an analogous manner to that given in Example I.
- the finished sintered body had a diameter of 35 mm with a length of 240 mm and a density of 5500 kg / m '(98% of the theoretical value).
- the resistance body 1 was provided with a smooth shrink tube made of silicone material as an insulating body 2 (jacket).
- the pressing method according to Example II has the advantage that the compact is more defined in its axial length, which is decisive for the operating voltage, and this can be easily changed, corrected and adjusted to the operating requirements by adjusting the piston on the end. This is of particular importance in the present case of the manufacture of monolithic resistance bodies, since the adaptation to the operating voltage cannot be carried out retrospectively by varying the number of disks, as is the case for conventional arresters consisting of a number of disks. This process is also more suitable for automation and mass production.
- the continuous operating voltage of the arrester was 24 kV, the residual voltage under a shock wave of 10 kA, 8/20 ps 70 kV.
- the invention is not restricted to the exemplary embodiments.
- a compact of at least 40% density should be achieved during pre-compression and a sintered body of at least 90% density based on the theoretical value during sintering.
- the height to diameter ratio of the resistance body can generally be> 1.
- the resistance body can also have a cylindrical shape other than smooth (FIG. 1). He can e.g. be limited on the outside by ribs or grooves (FIG. 2) or have a bore (hollow cylinder according to FIG. 3).
- the insulating body can be designed as a cast mass in epoxy resin, polymer concrete, silicone resin or as a covering in the form of a shrink tube, a coating, a coat of paint or a glazing.
- the arrester In the simplest case for indoor installation, the arrester consists only of a resistance body thinly coated with glass, lacquer or plastic with resilient metal contacts pressed onto the end face.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
- Emergency Protection Circuit Devices (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85115554T ATE52633T1 (de) | 1985-02-07 | 1985-12-06 | Verfahren zur herstellung eines ueberspannungsableiters unter verwendung eines varistors auf zno-basis und danach hergestellter ueberspannungsableiter. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH55185 | 1985-02-07 | ||
CH551/85 | 1985-02-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0196370A1 EP0196370A1 (fr) | 1986-10-08 |
EP0196370B1 true EP0196370B1 (fr) | 1990-05-09 |
Family
ID=4189608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85115554A Expired - Lifetime EP0196370B1 (fr) | 1985-02-07 | 1985-12-06 | Méthode de fabrication d'un dériveur de surtension utilisant un varistor à base de ZnO et dériveur de surtension ainsi fabriqué |
Country Status (8)
Country | Link |
---|---|
US (3) | US4729053A (fr) |
EP (1) | EP0196370B1 (fr) |
JP (1) | JPH0630288B2 (fr) |
AT (1) | ATE52633T1 (fr) |
BR (1) | BR8505988A (fr) |
DE (2) | DE3508030A1 (fr) |
IN (2) | IN166508B (fr) |
ZA (1) | ZA859752B (fr) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
NO170790C (no) * | 1986-12-12 | 1992-12-02 | Ceraver | Fremgangsmaate for fremstilling av lynavleder |
CA1263162A (fr) * | 1986-12-23 | 1989-11-21 | Guy St-Jean | Boitier de dispositif electrique, notamment de parafoudre, incluant une enveloppe isolante moulee |
SE456623B (sv) * | 1987-02-23 | 1988-10-17 | Asea Ab | Ventilavledare |
JP2647893B2 (ja) * | 1987-03-06 | 1997-08-27 | セラヴェール | 避雷器を製造する方法 |
JP2552309B2 (ja) * | 1987-11-12 | 1996-11-13 | 株式会社明電舎 | 非直線抵抗体 |
IN171826B (fr) * | 1988-03-23 | 1993-01-23 | Ngk Insulators Ltd | |
CA2010336C (fr) * | 1989-02-27 | 1996-11-19 | Atsunori Sano | Procede de production d'un derive de pyrido [1,2-a] pyrimidine |
JPH0812813B2 (ja) * | 1989-03-14 | 1996-02-07 | 日本碍子株式会社 | 電圧非直線抵抗体の製造法 |
US5008772A (en) * | 1990-09-24 | 1991-04-16 | Porta Systems Corp. | Telephone circuit protector module having plural circuit grounding means |
DE4031231A1 (de) * | 1990-10-04 | 1992-04-09 | Kuebler Heinrich | Messleiter, vorzugsweise fuer einen niveaumesswertgeber |
KR0139509B1 (ko) * | 1992-02-27 | 1998-07-01 | 후지무라 마사야 | 밀봉전극 및 이것을 사용한 서어지 흡수기 |
DE4319986A1 (de) * | 1993-06-11 | 1994-12-15 | Siemens Ag | Überspannungsableiter |
JP3146910B2 (ja) * | 1995-03-08 | 2001-03-19 | 株式会社日立製作所 | 避雷器を有する変電所 |
FR2735898B1 (fr) * | 1995-06-20 | 1997-08-01 | Gec Alsthom T & D Sa | Procede de fabrication d'un isolateur en materiau composite |
US5712757A (en) * | 1996-06-27 | 1998-01-27 | Raychem Corporation | Surge arrester having ridged terminals |
US5757604A (en) * | 1996-06-27 | 1998-05-26 | Raychem Corporation | Surge arrester having grooved and ridged terminals |
US5680289A (en) * | 1996-06-27 | 1997-10-21 | Raychem Corporation | Surge arrester |
DE19701243A1 (de) * | 1997-01-16 | 1998-07-23 | Asea Brown Boveri | Säulenförmig ausgebildeter, hochstromfester Widerstand, insbesondere Varistor auf der Basis eines Metalloxids, und Verfahren zur Herstellung eines solchen Widerstands |
SE509270C2 (sv) * | 1997-04-14 | 1998-12-21 | Asea Brown Boveri | Variabelt elektriskt motstånd samt förfarande för att öka respektive ändra resistansen hos ett elektriskt motstånd |
US5930102A (en) * | 1997-10-08 | 1999-07-27 | Joslyn Manufacturing Co. | Surge arrester having single surge arresting block |
DE19821239C5 (de) * | 1998-05-12 | 2006-01-05 | Epcos Ag | Verbundwerkstoff zur Ableitung von Überspannungsimpulsen und Verfahren zu seiner Herstellung |
US6018453A (en) * | 1998-06-18 | 2000-01-25 | Cooper Industries, Inc. | Surge arrester protection system and method |
EP0974984B1 (fr) * | 1998-07-20 | 2006-10-04 | Littelfuse Ireland Development Company Limited | Production de varistors |
US6519129B1 (en) | 1999-11-02 | 2003-02-11 | Cooper Industries, Inc. | Surge arrester module with bonded component stack |
US6279811B1 (en) | 2000-05-12 | 2001-08-28 | Mcgraw-Edison Company | Solder application technique |
US6657128B2 (en) | 2001-01-29 | 2003-12-02 | Mcgraw-Edison Company | Hydrophobic properties of polymer housings |
US7015786B2 (en) * | 2001-08-29 | 2006-03-21 | Mcgraw-Edison Company | Mechanical reinforcement to improve high current, short duration withstand of a monolithic disk or bonded disk stack |
US6657842B2 (en) | 2002-01-22 | 2003-12-02 | Hubbell Incorporated | Disconnector assembly for an arrestor |
US7436283B2 (en) * | 2003-11-20 | 2008-10-14 | Cooper Technologies Company | Mechanical reinforcement structure for fuses |
US8117739B2 (en) * | 2004-01-23 | 2012-02-21 | Cooper Technologies Company | Manufacturing process for surge arrester module using pre-impregnated composite |
US7075406B2 (en) * | 2004-03-16 | 2006-07-11 | Cooper Technologies Company | Station class surge arrester |
US7633737B2 (en) * | 2004-04-29 | 2009-12-15 | Cooper Technologies Company | Liquid immersed surge arrester |
DE102005007146A1 (de) * | 2005-02-11 | 2006-08-24 | Siemens Ag | Verfahren zur Ummantelung eines Varistorblockes mit einer elektrisch isolierenden Umhüllung sowie Varistorblock für einen Überspannungsableiter |
US8174132B2 (en) * | 2007-01-17 | 2012-05-08 | Andrew Llc | Folded surface capacitor in-line assembly |
US8629751B2 (en) | 2011-12-14 | 2014-01-14 | Tyco Electronics Corporation | High amperage surge arresters |
DE102017221783A1 (de) * | 2017-12-04 | 2019-06-06 | Siemens Aktiengesellschaft | Anordnung und Verfahren zum Schalten hoher Spannungen mit einer Schalteinrichtung und genau einem Widerstandsstapel |
CN114613563A (zh) * | 2020-12-08 | 2022-06-10 | 西安西电避雷器有限责任公司 | 一种避雷器及一种避雷器的加工方法 |
CN113363034B (zh) * | 2021-06-29 | 2022-11-18 | 西安西电避雷器有限责任公司 | 一种非线性金属氧化物棒形电阻及其制备方法 |
US11894166B2 (en) | 2022-01-05 | 2024-02-06 | Richards Mfg. Co., A New Jersey Limited Partnership | Manufacturing process for surge arrestor module using compaction bladder system |
CN114898956B (zh) * | 2022-05-26 | 2022-12-02 | 国网安徽省电力有限公司青阳县供电公司 | 一种基于智慧台区的配电网供电线路用避雷器 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE896386C (de) * | 1940-10-30 | 1953-11-12 | Aeg | Spannungsabhaengiger Widerstandskoerper, insbesondere fuer UEberspannungsableiter |
US3753198A (en) * | 1969-09-19 | 1973-08-14 | Denki Onkyo Co Ltd | Varistors |
US3806765A (en) * | 1972-03-01 | 1974-04-23 | Matsushita Electric Ind Co Ltd | Voltage-nonlinear resistors |
CA986235A (en) * | 1972-07-26 | 1976-03-23 | Takeshi Masuyama | Voltage-nonlinear resistors |
US4010440A (en) * | 1975-02-10 | 1977-03-01 | American Components Inc. | Electrical resistor component assembly which is hermetically sealed |
DE2620245A1 (de) * | 1975-05-12 | 1976-12-02 | Gen Electric | Nicht-lineares widerstandselement |
DE2526137C2 (de) * | 1975-06-10 | 1985-03-21 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur Herstellung eines Zinkoxid-Varistors |
US4069465A (en) * | 1976-07-12 | 1978-01-17 | Allen-Bradley Company | Cylindrical varistor and method of making the same |
US4092694A (en) * | 1977-03-16 | 1978-05-30 | General Electric Company | Overvoltage surge arrester having laterally biased internal components |
US4364021A (en) * | 1977-10-07 | 1982-12-14 | General Electric Company | Low voltage varistor configuration |
JPS5919448B2 (ja) * | 1978-03-03 | 1984-05-07 | 株式会社日立製作所 | 避雷器 |
JPS5915443Y2 (ja) * | 1978-03-18 | 1984-05-08 | 三菱電機株式会社 | 避雷器 |
US4377541A (en) * | 1978-08-21 | 1983-03-22 | General Electric Company | Process for preparing low voltage varistors |
US4335417A (en) * | 1978-09-05 | 1982-06-15 | General Electric Company | Heat sink thermal transfer system for zinc oxide varistors |
JPS6015127B2 (ja) * | 1980-04-07 | 1985-04-17 | 株式会社日立製作所 | 電圧非直線抵抗体およびその製法 |
JPS6070702A (ja) * | 1983-09-26 | 1985-04-22 | 株式会社日立製作所 | 防爆形酸化亜鉛避雷器 |
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 |
-
1985
- 1985-03-07 DE DE19853508030 patent/DE3508030A1/de not_active Withdrawn
- 1985-11-29 BR BR8505988A patent/BR8505988A/pt not_active IP Right Cessation
- 1985-12-06 AT AT85115554T patent/ATE52633T1/de not_active IP Right Cessation
- 1985-12-06 EP EP85115554A patent/EP0196370B1/fr not_active Expired - Lifetime
- 1985-12-06 DE DE8585115554T patent/DE3577616D1/de not_active Expired - Fee Related
- 1985-12-16 US US06/809,339 patent/US4729053A/en not_active Expired - Lifetime
- 1985-12-17 IN IN1011/MAS/85A patent/IN166508B/en unknown
- 1985-12-20 ZA ZA859752A patent/ZA859752B/xx unknown
-
1986
- 1986-02-05 JP JP61022217A patent/JPH0630288B2/ja not_active Expired - Fee Related
- 1986-02-10 IN IN89/MAS/86A patent/IN167087B/en unknown
-
1987
- 1987-08-31 US US07/090,913 patent/US4811478A/en not_active Expired - Lifetime
- 1987-08-31 US US07/090,894 patent/US4816959A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4811478A (en) | 1989-03-14 |
US4816959A (en) | 1989-03-28 |
ZA859752B (en) | 1986-08-27 |
EP0196370A1 (fr) | 1986-10-08 |
US4729053A (en) | 1988-03-01 |
ATE52633T1 (de) | 1990-05-15 |
IN166508B (fr) | 1990-05-19 |
DE3577616D1 (de) | 1990-06-13 |
JPH0630288B2 (ja) | 1994-04-20 |
JPS61183903A (ja) | 1986-08-16 |
BR8505988A (pt) | 1986-12-09 |
DE3508030A1 (de) | 1986-08-07 |
IN167087B (fr) | 1990-08-25 |
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