AT116800B - Impregnating compound for electrical capacitors. - Google Patents
Impregnating compound for electrical capacitors.Info
- Publication number
- AT116800B AT116800B AT116800DA AT116800B AT 116800 B AT116800 B AT 116800B AT 116800D A AT116800D A AT 116800DA AT 116800 B AT116800 B AT 116800B
- Authority
- AT
- Austria
- Prior art keywords
- ozokerite
- electrical capacitors
- impregnating compound
- capacitors
- mixture
- Prior art date
Links
Landscapes
- Organic Insulating Materials (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
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Tränkmasse für elektrische Kondensatoren.
Es sind Kondensatoren bekannt, deren Dielektrikum aus einer Mischung von Paraffin und Kolophonium besteht. Es hat sich gezeigt, dass diese Kondensatoren nach einiger Zeit ihren hohen Isolationswiderstand verlieren und ihre Durchschlagfestigkeit nachlässt. Die Ursache für diese Erscheinungen sind in erster Linie in dem kdstallinischen Aufbau des Paraffins zu suchen, da in die Zwischenräume zwischen den einzelnen Kristallkörperchen leicht Feuchtigkeit eindringt und somit die Eigenschaften des Kondensators herabsetzt.
Nach der Erfindung wird das Paraffin durch Ozokerit ersetzt. Ozokerit zeichnet sich gegenüber dem Paraffin durch eine etwas höhere Dielektrizitätskonstante aus. Von weit grösserer Wichtigkeit für Kondensatoren sind jedoch die Eigenschaften der amorphen Struktur und des höheren Tropfpunktes des Ozokerits.
Da im handelsüblichen Ozokerit auch geringe Mengen von Paraffin, d. h. niedrig molekulare Kohlenwasserstoffe enthalten sind, die zu kristallinischen Ausscheidungen neigen, so wird erfindungsgemäss durch Mischen des Ozokerits mit Kolophonium das Auskristallisieren des Paraffins verhindert. Die erfindungsgemässe Tränkmasse ist besonders geeignet für Tropenkondensatoren, da infolge des hohen Tropfpunktes der Kondensator auch bei Tropentemperatur noch Formbeständigkeit zeigt und gegen- über Feuchtigkeitseinfliissen unempfindlich ist.
Die erfindungsgemässe Mischung besteht aus 9 Teilen Ozokerit und einem Teil Kolophonium.
Das günstigste Mischungsverhältnis richtet sich je nach der Herkunft der verwendeten Stoffe. Für Kondensatoren, die starkem Temperaturwechsel ausgesetzt sind, empfiehlt es sich, einen Zusatz von Carnauba- wachs zu verwenden. Als eine besonders brauchbare Mischung hat sich an Tränkmasse folgende Zu-
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PATENT-ANSPRÜCHE :
1. Tränkmasse für elektrische Kondensatoren, dadurch gekennzeichnet, dass dieselbe aus einer Mischung von Kolophonium und Ozokerit besteht.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
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Impregnating compound for electrical capacitors.
Capacitors are known whose dielectric consists of a mixture of paraffin and colophony. It has been shown that these capacitors lose their high insulation resistance after a while and their dielectric strength decreases. The cause of these phenomena is primarily to be found in the crystalline structure of the paraffin, since moisture easily penetrates into the spaces between the individual crystal bodies and thus reduces the properties of the capacitor.
According to the invention, the paraffin is replaced by ozokerite. Ozokerite is characterized by a slightly higher dielectric constant than paraffin. Of far greater importance for capacitors, however, are the properties of the amorphous structure and the higher drop point of the ozokerite.
Since in the commercially available ozokerite also small amounts of paraffin, i. H. If it contains low molecular weight hydrocarbons which tend to form crystalline precipitates, then, according to the invention, mixing the ozokerite with rosin prevents the paraffin from crystallizing out. The impregnating composition according to the invention is particularly suitable for tropical condensers, since as a result of the high dropping point the condenser still exhibits dimensional stability even at tropical temperatures and is insensitive to the effects of moisture.
The mixture according to the invention consists of 9 parts of ozokerite and one part of colophony.
The best mixing ratio depends on the origin of the substances used. For capacitors that are exposed to strong temperature changes, it is advisable to use an additive of carnauba wax. The following additions to the impregnating mass have proven to be a particularly useful mixture
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PATENT CLAIMS:
1. Impregnating compound for electrical capacitors, characterized in that the same consists of a mixture of rosin and ozokerite.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE116800X | 1927-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT116800B true AT116800B (en) | 1930-03-10 |
Family
ID=5654865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT116800D AT116800B (en) | 1927-10-29 | 1928-07-18 | Impregnating compound for electrical capacitors. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT116800B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047315B (en) * | 1953-12-03 | 1958-12-24 | Bosch Gmbh Robert | Electrical capacitor, especially an alternating current capacitor |
DE1138164B (en) * | 1957-10-01 | 1962-10-18 | Robert Mueller | Process for the production of electrical wound capacitors with precisely reproducible capacitance |
-
1928
- 1928-07-18 AT AT116800D patent/AT116800B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047315B (en) * | 1953-12-03 | 1958-12-24 | Bosch Gmbh Robert | Electrical capacitor, especially an alternating current capacitor |
DE1138164B (en) * | 1957-10-01 | 1962-10-18 | Robert Mueller | Process for the production of electrical wound capacitors with precisely reproducible capacitance |
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