AT228295B

AT228295B - High voltage electrical cable

Info

Publication number: AT228295B
Application number: AT833561A
Authority: AT
Original assignee: Pirelli
Priority date: 1961-03-31
Filing date: 1961-11-06
Publication date: 1963-07-10

Description

  

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  Elektrisches Hochspannungskabel 
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 oderAussenflächen wesentlich grössere Radien als die Rillenkanten von gerillten Streifen gemäss der eingangs erwähnten brit. Patentschrift ; dies führt zu einer proportionalen Verminderung der Konzentration der elektrischen Beanspruchungen, was wieder die Anwendung höherer Betriebsspannungen ermöglicht. 



   Selbstverständlich können die   erfindungsgemässenKabel wahlweise   für Wechselstrom oder Gleichstrom i verwendet werden. 



   Die beschriebenen Beispiele erschöpfen im übrigen die Ausführungsmöglichkeiten der Erfindung nicht, sondern lassen noch verschiedene Abwandlungen zu. 



    PATENTANSPRÜCHE :    
1. Elektrisches Hochspannungskabel für Gleich- oder Wechselstrom, bei dem das Dielektrikum durch
Isolierstreifen aus Kunststoff gebildet ist, die je in Berührung mit einem Schleier aus Imprägnieröl ste- hen, dadurch gekennzeichnet, dass die Isolierstreifen voneinander durch dünne isolierende aber öldurch- lässige Lagen getrennt sind, die einen leichten Durchtritt des Imprägnieröls ermöglichen.



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  High voltage electrical cable
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 orexternal surfaces significantly larger radii than the groove edges of grooved strips according to the British patent mentioned above; this leads to a proportional reduction in the concentration of electrical stresses, which in turn enables higher operating voltages to be used.



   Of course, the cables according to the invention can be used either for alternating current or direct current i.



   The examples described do not, moreover, exhaust the possible embodiments of the invention, but rather allow various modifications.



    PATENT CLAIMS:
1. Electrical high-voltage cable for direct or alternating current, in which the dielectric through
Insulating strips made of plastic are each in contact with a veil of impregnating oil, characterized in that the insulating strips are separated from one another by thin insulating but oil-permeable layers which allow the impregnating oil to pass easily through.

Claims

2. High-voltage cable according to claim 1, characterized in that the separating layers are formed by individual threads made of plastic, which are resistant to the action of the impregnating oil and are wrapped around the insulating strips.

3. High-voltage cable according to claim 1, characterized in that the thin separating layers are formed by a fabric made of plastic which is resistant to the action of the impregnating oil.

4. High-voltage cable according to claim 2, characterized in that the fabric which forms the thin separating layers is wound in the form of a strip which has the same width as the insulating strip, the winding being designed so that the fabric strip is the underlying Isolation strips completely covered.

5. High-voltage cable according to claim 1, characterized in that the separating layers are in the form of closed braids made of a material which is resistant to the action of the impregnating oil.

6. High-voltage cable according to one of the preceding claims, characterized in that the material forming the thin separating layers is of the same type as the insulating strip material and consists, for example, of polypropylene.