Electric plug-in device and arrangement having an electric plug-in device

1. An electric plug-in device for plugging into an electric receiving device, the electric plug-in device comprising:

a main element configured to be fixedly connected to the receiving device, said main element having an inner conductor and an insulating body enclosing said inner conductor;

said insulating body having field-controlling control inserts that are separated from one another by insulating layers;

a pusher element that is displaceable relative to said main element; and

a spring device which, when the plug-in device has been plugged into said receiving device, is configured to exert an axially acting spring force on said pusher element in a direction of the receiving device.

2. The electric plug-in device according to claim 1 , wherein said main element is configured to be directly connectible to the receiving element or indirectly by way of a housing wall.

3. The electric plug-in device according to claim 1 , wherein said pusher element is a ring with a ring interior, and wherein said insulating body and said inner conductor are disposed in said ring interior.

4. The electric plug-in device according to claim 1 , wherein said pusher element is a rotationally symmetrical ring.

5. The electric plug-in device according to claim 1 , wherein:

the plug-in device is a high-voltage bushing configured to be plugged in; and

said main element is configured to be pushed into an apparatus connection part of an electrical apparatus.

6. The electric plug-in device according to claim 1 , wherein said control inserts are arranged concentrically around said inner conductor.

7. An arrangement, comprising:

the plug-in device according to claim 1 ; and

the receiving device configured to receive said plug-in device.

8. An arrangement, comprising:

an electrical apparatus with a fluid-tight housing, said apparatus having an apparatus connection part disposed in an opening formed in said housing; and

the plug-in device according to claim 1 , said plug-in device being configured for plugging into said apparatus connection part and for said inner conductor to be connected to a contact device of said apparatus connection part.

9. The electric plug-in device according to claim 1 , further comprising an insulating material fixedly attached to said insulating body, and wherein said pusher element adjoins said insulating material.

10. The electric plug-in device according to claim 9 , wherein said insulating material is sprayed onto said insulating body or releasably pushed onto said insulating body.

11. The electric plug-in device according to claim 9 , wherein said insulating material is a plastically and/or elastically deformable material.

12. The electric plug-in device according to claim 9 , wherein said insulating material is silicone material.

13. The electric plug-in device according to claim 9 , wherein:

said insulating body tapers conically in the direction of the receiving device; and

said insulating material is a silicone cone having an inner boundary layer resting on said insulating body and an outer boundary layer lying on an inner wall of the receiving device after the plug-in device has been pushed into the receiving device.

14. The electric plug-in device according to claim 9 , wherein said pusher element is formed with a pressure surface which extends radially outward, as seen from said inner conductor, and lies on said insulating material.

15. The electric plug-in device according to claim 14 , wherein a surface normal of said pressure surface lies parallel to a longitudinal axis of said inner conductor or at an angle with respect to said longitudinal axis.