Patent Application
20130233617
This application claims the priority, under 35 U.S.C. §119, of German patent application DE 10 2012 203 712.8, filed Mar. 8, 2012; the prior application is herewith incorporated by reference in its entirety.
The invention relates to a cable end termination having an outer insulator which is supported on a cable-end carrying flange at one end and carries an outdoor connection at the other end, wherein an opening containing an insulating body for inserting a cable end is present in the carrying flange.
In a prior known cable end termination of this kind (lecture notes from Prof. Volker Hinrichsen, “High-Voltage Technology”, Winter Semester '10/'11+Summer Semester '11, page 22, from the Technical University of Darmstadt), the insulating body is a cylindrical hollow cylinder. In the installed state, the cable without a casing is routed into the interior of the outer insulator through the hollow space in the hollow cylinder. In this case, potential control is also performed by means of a ground electrode with an insulating cone which has been pushed on. The construction of the prior known cable end termination overall is relatively complicated and additionally has to be performed on site. In this case, the ground electrode which has been pushed on and the insulating cone initially have to be removed from the prefabricated cable end; these parts have to be joined again after the cable end has been passed through the insulating body of the carrying flange.
It is accordingly an object of the invention to provide a cable end terminal which overcomes the above-mentioned disadvantages of the heretofore-known devices and methods of this general type and which provides for a cable end termination that has a simple construction and that is easy to install.
With the foregoing and other objects in view there is provided, in accordance with the invention, a cable end termination, comprising:
In other words, the object is achieved, in accordance with the invention, by providing the insulating body in a novel cable end termination with a controlled high-voltage bushing that has a central plug contact which is accessible from the outside.
A significant advantage of the cable end termination according to the invention is that a prefabricated cable end can be readily introduced into the controlled high-voltage bushing; the cable end termination itself does not need to be opened for this purpose. A further advantage is that the conductive inserts in the controlled high-voltage bushing provide good field control at the outdoor end.
This is true, in particular, when the cable end termination according to the invention has, at least at its end which is averted from the outer insulator, an inner conical recess, which is open in the direction of said end, for receiving the correspondingly shaped cable end.
In an advantageous embodiment of the cable end termination according to the invention, the recess in the high-voltage bushing is shaped in accordance with a cable end having a ground electrode pushed onto it and having an insulating cone. Optimum field control can be achieved as a result.
Various insulating materials, for example cast resin, can be used as the material for insulating the high-voltage bushing of the cable end termination according to the invention. However, it is considered to be particularly advantageous when the insulation of the high-voltage bushing is composed of resin-impregnated paper because this means particularly fine field control can be achieved by control inserts which are particularly closely spaced apart from one another.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a cable end termination, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
Referring now to the figures of the drawing in detail and first, particularly, to
Referring now to the detail illustrated in
If the protective housing 4 is detached from the carrying flange 5, the central plug contact 16 is freely accessible from the outside, and therefore a cable 2, which is correspondingly prefabricated at its end, is readily pushed into the conical recess 12 in the high-voltage bushing 10 by way of a ground electrode and an insulating cone and can be plugged into the central plug contact 16 by way of its internal conductor.
The insulation of the high-voltage bushing 10 can be composed of different materials, for example encapsulation compound such as cast resin. In the illustrated exemplary embodiment, resin-impregnated paper is preferred for the insulation of the high-voltage bushing 10 because a high-voltage bushing with an insulation of this kind can be provided with a relatively large number of conductive inserts 11 in a relatively simple manner.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2012 203 712.8 | Mar 2012 | DE | national |
