Wall bushing
A wall bushing for high voltage application is presented. The wall bushing includes a grounded shield. The grounded shield includes a grading ring in a distal end thereof. The grading ring has an elliptic cross section with conjugate diameters, wherein a major diameter of the conjugate diameters is arranged in an axial direction of the grounded shield and a minor diameter of the conjugate diameters is arranged in a radial direction of the grounded shield. The major diameter is larger than the minor diameter.
1. A wall bushing for high voltage application, the wall bushing comprising a grounded shield, the grounded shield comprising a grading ring in a distal end thereof, the grading ring having an elliptic cross section with conjugate diameters, wherein a major diameter of the conjugate diameters is arranged in an axial direction of the grounded shield and a minor diameter of the conjugate diameters is arranged in a radial direction of the grounded shield, wherein the major diameter is larger than the minor diameter, wherein the major diameter is between 10 and 55% longer than the minor diameter, and wherein a shortest distance between the grading ring and a grounded flange comprises about a same distance between the grounded shield and the grounded flange.
2. The high voltage wall bushing according to claim 1 , wherein the major diameter is between 15 and 40% longer than the minor diameter.
3. The high voltage wall bushing according to claim 2 , wherein the major diameter is between 18 and 34% longer than the minor diameter.
4. The high voltage wall bushing according to claim 1 , wherein the grounded shield is elongated and concentric around a longitudinal axis.
5. The high voltage wall bushing according to claim 1 , wherein the wall bushing is a gas insulated wall bushing.
6. The high voltage wall bushing according to claim 1 , wherein the grading ring is made of Aluminium.
7. The high voltage wall bushing according to claim 1 , wherein the wall bushing is configured to be arranged with the grounded shield concentrically arranged around a high voltage tube.
8. A high voltage wall bushing comprising:
a grounded shield that includes a grading ring in a distal end thereof, wherein a major diameter of conjugate diameters related to the grading ring is arranged in an axial direction of the grounded shield and a minor diameter of conjugate diameters related to the grading ring is arranged in a radial direction of the grounded shield,
wherein the major diameter is larger than the minor diameter, wherein the major diameter is between 10 and 55% longer than the minor diameter, and
wherein a shortest distance between the grading ring and the grounded flange comprises about a same distance between the grounded shield and the grounded flange.
9. The high voltage wall bushing according to claim 8 , wherein the grading ring includes an elliptic cross section with the conjugate diameters.
10. The high voltage wall bushing of claim 8 , wherein the major diameter is between 15 and 40% longer than the minor diameter.
11. The high voltage wall bushing according to claim 8 , wherein the major diameter is between 18 and 34% longer than the minor diameter.
12. The high voltage wall bushing according to claim 8 , wherein the grounded shield is elongated and concentric around a longitudinal axis.
13. The high voltage wall bushing according to claim 8 , wherein the wall bushing is a gas insulated wall bushing.
14. The high voltage wall bushing according to claim 8 , wherein the grading ring comprises Aluminium.
15. The high voltage wall bushing according to claim 8 , wherein the wall bushing is configured to be arranged with the grounded shield concentrically arranged around a high voltage tube.
16. The high voltage wall bushing according to claim 8 , wherein the wall bushing comprises a gas insulated wall bushing, and wherein the grading ring comprises Aluminium.