High-voltage bushing and method for the production thereof

1. A high-voltage bushing, comprising:

a cylindrical winding support formed of an electrically conductive material, said cylindrical winding support having a circumferential sealing groove formed therein;

an insulating body disposed concentrically around said cylindrical winding support; and

a sealing device for sealing a gap occurring between said cylindrical winding support and said insulating body, said sealing device including a sealing element received in said circumferential sealing groove, and said sealing device including a sealing ring disposed concentrically relative to said sealing element.

2. The high-voltage bushing according to claim 1 , wherein said sealing ring contains resin.

3. The high-voltage bushing according to claim 1 , wherein said insulating body includes insulating layers disposed concentrically relative to one another, and said insulating body is impregnated with a hardenable resin.

4. The high-voltage bushing according to claim 1 , wherein said sealing element contains an elastic synthetic material.

5. The high-voltage bushing according to claim 1 , wherein said cylindrical winding body is a current conductor.

6. A high-voltage bushing, comprising:

a cylindrical winding support formed of an electrically conductive material, said cylindrical winding support having a circumferential sealing groove formed therein, and said cylindrical winding support having circumferential grooves formed therein:

an insulating body disposed concentrically around said cylindrical winding support;

a sealing device for sealing a gap occurring between said cylindrical winding support and said insulating body, said sealing device including a sealing element received in said circumferential sealing groove;

first and second protective elements sealing said sealing groove;

said protective elements each being disposed in a respective one of said circumferential grooves formed in said cylindrical winding support; and

said sealing groove being disposed axially between said first and second protective elements.

7. A method for producing a high-voltage bushing, the method comprising the following steps:

forming a circumferential sealing groove in a cylindrical winding support formed of an electrically conductive material;

providing an insulating body having mutually concentrically disposed insulating layers;

placing the insulating body concentrically around the cylindrical winding support;

inserting a sealing element into the circumferential sealing groove in the cylindrical winding support;

placing a sealing ring coaxially around the sealing element; and

subsequently impregnating the insulating body with a resin to seal a gap occurring between the cylindrical winding support and the insulating body.

8. A method for producing a high-voltage bushing, the method comprising the following steps:

forming a circumferential sealing groove in a cylindrical winding support formed of an electrically conductive material;

forming circumferential grooves in the cylindrical winding support;

providing an insulating body having mutually concentrically disposed insulating layers;

placing the insulating body concentrically around the cylindrical winding support;

inserting a sealing element into the circumferential sealing groove in the cylindrical winding support;

sealing the sealing groove by placing first and second protective elements in the respective circumferential grooves formed in the cylindrical winding support;

subsequently impregnating the insulating body with a resin to seal a gap occurring between the cylindrical winding support and the insulating body; and

locating the sealing groove axially between the first and second protective elements.