Plug-in bushing and high-voltage installation having a bushing such as this

1. A plug-in high-voltage bushing for connecting an external electrical conductor to a metal-encapsulated component, which is filled with a liquid or gaseous insulating agent, of a high-voltage installation, the bushing comprising:

an electrical conductor that is routed along an axis and has a plug contact and a connection for the external conductor;

an insulator that is attached to the electrical conductor;

a mounting flange that is attached to the insulator;

a shield that is cast onto an outer surface of the insulator and that extends in an axial direction from the mounting flange to the connection for the external electrical conductor; and

a device that surrounds the electrical conductor and controls an electrical field which acts when high voltage is applied,

wherein the insulator has a tapering section that dielectrically strengthens a joint after insertion of the bushing into a plug part that closes a component of the high-voltage installation forming a seal for the insulating agent;

wherein the joint is arranged between an insulating sleeve of the plug part and the tapering section of the insulator,

wherein the field control device is in the form of a capacitor winding, and the capacitor winding has capacitor plates which are electrically isolated from one another, are kept at a distance from one another in a radial direction by insulating film, and are integrated in the insulator by embedding the capacitor winding in a cured polymer compound;

wherein the capacitor plates are passed through the mounting flange into the tapering section of the insulator, and

wherein a surface, which bounds the joint, of the insulator includes an elastically deformable insulation which is held on the capacitor winding.

2. The bushing as claimed in claim 1 , wherein a surface, which bounds the joint (F) of the insulator section, comprises elastically deformable insulation which is held on the capacitor winding.

3. The bushing as claimed in claim 2 , wherein the elastically deformable insulation is an elastomer.

4. The bushing as claimed in claim 2 , wherein the elastically deformable insulation engages behind a step of the capacitor winding.

5. The bushing as claimed in claim 1 , wherein the cured polymer compound contains a filler which acts as a diffusion barrier for water which enters from outside.

6. The bushing as claimed in claim 1 , wherein the shield is arranged on a coating of the insulator, which acts as a diffusion barrier for water.

7. The bushing as claimed in claim 1 , wherein those ends of the capacitor plates which face the plug contact are located on an envelope surface (H) which is matched to contour of the joint (F).

8. A high-voltage installation having a component which is filled with a liquid or gaseous insulating agent and which comprises a plug part that closes the metal-enclosed component and forms a seal for the insulating agent, and having a plug-in bushing as claimed in claim 1 , which is inserted into a plug part that contains an insulating sleeve, such that a joint is arranged between the insulating sleeve of the plug part and a tampering section of the insulator, and closes the component of the high-voltage insulation forming a seal for the insulating agent, wherein the plug part is a field control element.

9. The high-voltage installation as claimed in claim 8 , wherein the insulating sleeve is fitted with a control electrode which carries a high-voltage potential.

10. The high-voltage installation as claimed in claim 8 , wherein the insulating sleeve comprises field-controlling insulating material.

11. The high-voltage installation as claimed in claim 8 , wherein a surface, which bounds the joint (F), of the insulating sleeve comprises elastically deformable insulation.

12. The high-voltage installation as claimed in claim 11 , wherein the elastically deformable insulation is an elastomer.

13. A plug-in high-voltage bushing for connecting an external electrical conductor to a metal-encapsulated component, the bushing comprising:

an electrical conductor that is routed along an axis and has a plug contact and a connection for the external conductor;

an insulator that is attached to the electrical conductor;

a shield that is cast onto an outer surface of the insulator and that extends in an axial direction from a mounting flange to the connection for the external electrical conductor; and

a device that surrounds the electrical conductor and controls an electrical field which acts when high voltage is applied,

wherein the insulator has a tapering section that dielectrically strengthens a joint after insertion of the bushing into a plug part that closes a component of the high-voltage installation forming a seal for the insulating agent, and

wherein the field control device is in the form of a capacitor winding, and the capacitor winding has capacitor plates which are electrically isolated from one another, are kept at a distance from one another in a radial direction by insulating film, and are integrated in the insulator by embedding the capacitor winding in a cured polymer compound, and

wherein a surface, which bounds the joint, of the insulator includes an elastically deformable insulation which is held on the capacitor winding.

14. The high-voltage bushing as claimed in claim 13 , wherein the mounting flange is attached to the insulator.

15. The high voltage bushing as claimed in claim 13 , wherein the joint is arranged between an insulating sleeve of the plug part and the tapering section of the insulator.

16. The high voltage bushing as claimed in claim 13 , wherein the capacitor plates extend through the mounting flange into the tapering section of the insulator.