EP0023995B1 - Outside-weather isolator - Google Patents
Outside-weather isolator Download PDFInfo
- Publication number
- EP0023995B1 EP0023995B1 EP80104377A EP80104377A EP0023995B1 EP 0023995 B1 EP0023995 B1 EP 0023995B1 EP 80104377 A EP80104377 A EP 80104377A EP 80104377 A EP80104377 A EP 80104377A EP 0023995 B1 EP0023995 B1 EP 0023995B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulator
- filler
- cast resin
- outside
- isolator
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/54—Insulators or insulating bodies characterised by their form having heating or cooling devices
Definitions
- the invention relates to an insulator for outdoor climate according to the preamble of claim 1.
- the invention has for its object to get by without an energy supply from an auxiliary network and with significantly lower energy requirements per station to avoid harmful formation of condensation on the insulators.
- a particularly advantageous solution to the problem with regard to aging and the exact reproducibility of the heating effect can be achieved by using extenders with a much larger loss angle tan 8 than with casting resin, these extenders possibly also having a much lower dielectric constant DK than casting resin to increase the field strengths should.
- These requirements are e.g. of polyvinyl chloride in the form of granules mixed with the liquid casting resin or by eucryptite as an extender substitute.
- the amount of the extender is to be measured in such a way that there is sufficient power dissipation in the insulator, which according to available knowledge is 1 to 2 watts per medium-voltage insulator. For other isolators, other performances can prove to be more advantageous.
Landscapes
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
- Thermistors And Varistors (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Die Erfindung betrifft einen Isolator für Aussenraum-Klima nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an insulator for outdoor climate according to the preamble of claim 1.
Aussenraum-Klima tritt z.B. in blechgekapselten Netzstationen auf und führt zeitweilig zur Bildung von Kondenswasser an Isolatoren, wodurch deren Spannungsfestigkeit vermindert wird und unter Umständen eine Schädigung eintritt. Um diese Erscheinungen zu vermeiden, hat man im Innern solcher Stationen entweder eine allgemein wirkende Konvektionsheizung mit unerwünschter Mobilisierung der Raumfeuchtigkeit durch Lufterwärmung oder neuerdings eine Konduktionsheizung am Stützer-Trageisen ohne nennenswerte Lufterwärmung vorgesehen. Zu diesem Zweck ist in beiden Fällen ein relativ hoher Energiebedarf bis 600 W je Station notwendig, wovon dem einzelnen Isolator nur ein Bruchteil zugute kommt. Die Heizenergie muss aus einem Hilfsstromnetz entnommen werden.Outdoor climate occurs e.g. in sheet-encapsulated network stations and sometimes leads to the formation of condensation on insulators, which reduces their dielectric strength and may cause damage. In order to avoid these phenomena, either general-purpose convection heating with undesired mobilization of the room humidity by air heating or, more recently, conduction heating on the support carrying iron without any noteworthy air heating has been provided inside such stations. For this purpose, a relatively high energy requirement of up to 600 W per station is necessary in both cases, of which only a fraction benefits the individual insulator. The heating energy must be taken from an auxiliary power supply.
Aus der DE-A-1 544 965 ist es zwar grundsätzlich bekannt, in einem Kunststoffisolatorkörper Füllstoffe, beispielsweise Kaolin, als Streckmittel zu verwenden. Die relativ hohe Dielektrizitätskonstante und der hohe Verlustfaktor solcher Füllstoffe werden jedoch nicht im Sinne der beschriebenen Erfindung genutzt, sondern als schädlich und beschränkend für deren Verwendung in elektrischen Isolatoren bezeichnet.From DE-A-1 544 965 it is known in principle to use fillers, for example kaolin, as extenders in a plastic insulator body. However, the relatively high dielectric constant and the high loss factor of such fillers are not used in the sense of the described invention, but rather are described as harmful and restrictive for their use in electrical insulators.
Der Erfindung liegt die Aufgabe zugrunde, ohne Energieversorgung aus einem Hilfsnetz und mit wesentlich geringerem Energiebedarf je Station auszukommen, um eine schädliche Kondenswasserbildung an den Isolatoren zu vermeiden.The invention has for its object to get by without an energy supply from an auxiliary network and with significantly lower energy requirements per station to avoid harmful formation of condensation on the insulators.
Die Lösung der gestellten Aufgabe gelingt auf einfache und sichere Weise nach der Erfindung durch die Massnahmen nach den kennzeichnenden Merkmalen des Patentanspruchs 1.The problem is solved in a simple and safe manner according to the invention by the measures according to the characterizing features of patent claim 1.
Auf diese Weise kann eine Konvektionsheizung des Innenraumes z.B. solcher Stationen überhaupt vermieden und die Energie für die Erwärmung der Isolatoren direkt und zur notwendigen Zeit aus dem Hochspannungsnetz ohne Schaltaufwand entnommen werden. Die die ausreichende Erwärmung der Isolatoren erzwingenden inneren Verluste im Isolator können als ohmsche Verluste, z.B. durch Beimengung von Russ, oder durch eine Ladungsverschiebung im Wechselfeld erzeugende gegeneinander isolierte Metallteilchen im Giessharz des Isolators erzeugt werden.In this way, convection heating of the interior e.g. such stations are avoided at all and the energy for heating the insulators can be drawn directly and at the necessary time from the high-voltage network without switching operations. The internal losses in the insulator which force the insulators to heat sufficiently can be described as ohmic losses, e.g. by adding soot, or by a charge shift in the alternating field producing mutually insulated metal particles in the casting resin of the insulator.
Eine besonders vorteilhafte Lösung des Problems hinsichtlich Alterung und genauer Reproduzierbarkeit des Heizeffektes lässt sich durch die Verwendung von Streckmitteln mit wesentlich grösserem Verlustwinkel tan 8 als bei Giessharz erreichen, wobei diese Streckmittel gegebenenfalls zur Erhöhung der Feldstärken ausserdem auch noch eine wesentlich niedrigere Dielektrizitätskonstante DK als Giessharz besitzen sollen. Diese Forderungen werden z.B. von Polyvinylchlorid in Form von dem flüssigen Giessharz beigemengten Granulat oder durch Eukryptit als Streckmittelersatz erfüllt. Die Menge des Streckmittels ist dabei so zu bemessen, dass eine ausreichende Verlustleistung im Isolator entsteht, die nach vorliegenden Erkenntnissen bei 1 bis 2 Watt je Mittelspannungs-lsolator liegt. Bei anderen Isolatoren können sich andere Leistungen als vorteilhafter erweisen.A particularly advantageous solution to the problem with regard to aging and the exact reproducibility of the heating effect can be achieved by using extenders with a much larger loss angle tan 8 than with casting resin, these extenders possibly also having a much lower dielectric constant DK than casting resin to increase the field strengths should. These requirements are e.g. of polyvinyl chloride in the form of granules mixed with the liquid casting resin or by eucryptite as an extender substitute. The amount of the extender is to be measured in such a way that there is sufficient power dissipation in the insulator, which according to available knowledge is 1 to 2 watts per medium-voltage insulator. For other isolators, other performances can prove to be more advantageous.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80104377T ATE4255T1 (en) | 1979-08-09 | 1980-07-24 | INSULATOR FOR EXTERIOR CLIMATE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2932359 | 1979-08-09 | ||
DE19792932359 DE2932359A1 (en) | 1979-08-09 | 1979-08-09 | INSULATOR FOR OUTDOOR CLIMATE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0023995A2 EP0023995A2 (en) | 1981-02-18 |
EP0023995A3 EP0023995A3 (en) | 1981-05-20 |
EP0023995B1 true EP0023995B1 (en) | 1983-07-20 |
Family
ID=6078074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80104377A Expired EP0023995B1 (en) | 1979-08-09 | 1980-07-24 | Outside-weather isolator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0023995B1 (en) |
AT (1) | ATE4255T1 (en) |
DE (2) | DE2932359A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH688021A5 (en) * | 1994-07-18 | 1997-04-30 | Cws Ag | Apparatus for formation of soap scum and its use. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1863626A (en) * | 1928-11-29 | 1932-06-21 | Firm Koch & Sterzel Ag | Disconnecting switch |
US1856123A (en) * | 1929-12-11 | 1932-05-03 | Ohio Brass Co | Heater for insulators |
GB940400A (en) * | 1961-06-06 | 1963-10-30 | Central Electr Generat Board | Improvements in or relating to electrical insulators |
DE1544965B2 (en) * | 1964-06-09 | 1971-07-22 | Georgia Kaolin Company, Elizabeth, NJ (V St A ) | ELECTRIC INSULATING COMPOUND |
GB1118553A (en) * | 1965-04-12 | 1968-07-03 | Westinghouse Electric Corp | Highly filled rigid crack resistant casting composition |
-
1979
- 1979-08-09 DE DE19792932359 patent/DE2932359A1/en not_active Withdrawn
-
1980
- 1980-07-24 DE DE8080104377T patent/DE3064261D1/en not_active Expired
- 1980-07-24 AT AT80104377T patent/ATE4255T1/en not_active IP Right Cessation
- 1980-07-24 EP EP80104377A patent/EP0023995B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0023995A3 (en) | 1981-05-20 |
EP0023995A2 (en) | 1981-02-18 |
DE2932359A1 (en) | 1981-02-26 |
DE3064261D1 (en) | 1983-08-25 |
ATE4255T1 (en) | 1983-08-15 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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GBPR | Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state |