High-voltage feed-through, electrical device having a high-voltage feed-through, and method for producing the electrical device

Abstract

A high-voltage feed-through contains a securing flange for securing the high-voltage feed-through to a wall. The securing flange contains a retaining part and a moving part, wherein the moving part is mounted relative to the retaining part such that it can rotate in relation to a longitudinal direction of the high-voltage feed-through. An electrical device contains a fluid-tight housing and the high-voltage feed-through. A device connection part is provided for receiving and contacting the high-voltage feed-through.

Claims

1. A high-voltage feed-through, comprising: an attachment flange for attaching the high-voltage feed-through to a wall, said attachment flange having a holding part and a movable part, wherein said movable part is mounted so as to be able to rotate relative to said holding part about a longitudinal axis of the high-voltage feed-through defined by an inner conductor that extends along said longitudinal axis.

2. The high-voltage feed-through according to claim 1, further comprising an outer housing, said holding part is fixed with respect to said outer housing of the high-voltage feed-through.

3. The high-voltage feed-through according to claim 1, wherein said movable part is a rotating ring that is disposed in a concentric manner about said holding part.

4. The high-voltage feed-through according to claim 3, wherein: said holding part has an outer guide groove formed therein; and said rotating ring has an inner face and on said inner face a protrusion is disposed that engages in said outer guide groove of said holding part.

5. The high-voltage feed-through according to claim 4, wherein said holding part is configured at least in two pieces including a first and a second annular element, wherein said first annular element has a first outer indentation formed therein and said second annular element has a second outer indentation formed therein, wherein after said first and second annular elements have been brought together said first and second outer indentations form said outer guide groove.

6. The high-voltage feed-through according to claim 1, further comprising: a high-voltage connection; a mating section configured so as to plug the high-voltage feed-through into a device connection part of an electrical device, said mating section having an outer coating of a flexible insulating coating material; and said inner conductor extending in a longitudinal direction between said high-voltage connection and said mating section of said high-voltage feed-through.

7. The high-voltage feed-through according to claim 1, further comprising an insulating body having field-controlling control inserts that are separated from one another by insulating layers, and wherein said field-controlling control inserts are disposed in a concentric manner around said inner conductor.

8. The high-voltage feed-through according to claim 7, wherein said insulating body contains a hardened resin.

9. An electrical device, comprising: a fluid-tight housing; a high-voltage feed-through having an attachment flange, said attachment flange having a holding part and a movable part, wherein said movable part is mounted so as to be able to rotate relative to said holding part to about a longitudinal axis of said high-voltage feed-through defined by an inner conductor that extends along said longitudinal axis; and a device connection part receiving and contacting said high-voltage feed-through.

10. The electrical device according to claim 9, wherein: said device connection part has an attachment section, said device connection part is attached by means of said attachment section to said fluid-tight housing; said device connection part has a hollow receiving section extending from an electrically non-conductive insulating material into said fluid-tight housing; and said device connection part has a metal contact part disposed on a closed tapering end region, said metal contact part extending through said electrically non- conductive insulating material of said hollow receiving section or increasing a length of said hollow receiving section towards the closed tapering end region.

11. The electrical device according to claim 10, further comprising a current connection line extending within said fluid-tight housing, said metal contact part is connected to a convertor winding via said current connection line.

12. The electrical device according to claim 11, wherein said current connection line is equipped with a current sensor.

13. A method for producing an electrical device having a fluid-tight housing and a device connection part so as to receive and contact a high-voltage feed-through, the high-voltage feed-through having an attachment flange for attaching the high-voltage feed-through to a wall, the attachment flange having a holding part and a movable part, wherein the movable part is mounted so as to be able to rotate relative to the holding part about a longitudinal axis of the high-voltage feed-through defined by an inner conductor that extends along said longitudinal axis, the method comprises the steps of; inserting the high-voltage feed-through into the device connection part; and rotating the movable part of the attachment flange of the high-voltage feed-through about the longitudinal axis of the high-voltage feed-through so as to align attachment elements of the high-voltage feed-through with respect to attachment elements of the device connection part.

Description

(1) The invention is further explained below with reference to the exemplary embodiments described in the FIGS. 1 and 2.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(2) FIG. 1 illustrates a schematic cross-sectional view of a portion of an exemplary embodiment of a high-voltage feed-through in accordance with the invention;

(3) FIG. 2 illustrates a schematic cross-sectional view of a portion of an exemplary embodiment of an electrical device in accordance with the invention.

DETAILED DESCRIPTION OF THE INVENTION

(4) FIG. 1 illustrates a sectional view of a portion of a high-voltage feed-through 1. The high-voltage feed-through 1 comprises an inner conductor 2. The inner conductor 2 is encompassed by an insulating body 3 that electrically insulates the inner conductor 2 from its environment. The inner conductor 2 extends along a longitudinal axis 4 of the high-voltage feed-through 1. The high-voltage feed-through 1 comprises moreover an outer housing 5 so as to mechanically protect the high-voltage feed-through 1. A potential tap 7 is inserted into a cut-out 6 in the housing 5. It is possible by means of the potential tap 7 to monitor a voltage and/or a current at the high-voltage feed-through 1. The potential tap 7 is accordingly configured so as to be connected to a measuring device.

(5) An attachment flange 8 is provided so as to attach the high-voltage feed-through 1 to a wall 14. The attachment flange 8 extends in an axial manner from the inner conductor 2 outwards, wherein the inner conductor 2 is guided through the attachment flange 8. The attachment flange 8 comprises a holding part 9. The holding part 9 comprises a first element 10 that comprises a first indentation 11 and a recess 12 so as to receive a seal 13. The seal 13 is used so as to seal a boundary surface between the attachment flange 8 and the wall 14, which is indicated in FIG. 1 by means of a dot-dashed line. The first element 10 of the holding part 9 is arranged in an annular manner about the inner conductor 2. The holding part 9 comprises moreover a second element 15 that comprises a second indentation 16. The first and the second element 10, 15 are fixedly connected to one another by means of a screw connection 17. The holding part 9 is moreover fixedly connected to the outer housing 5 with the result that it is not possible for the housing 5 and the holding part 9 to move relative to one another. The first and the second indentation 11 or 16 form a guide groove 18. The attachment flange 8 comprises moreover a movable part that is designed as a rotating ring 19. The rotating ring 19 is arranged in a concentric manner with respect to the holding part 9 and the inner conductor 2 and is able to move about the longitudinal axis 4. The rotating ring 19 comprises a plurality of orifices 20, 21 that are configured so as to receive attachment means. The high-voltage feed-through 1 may be attached to the wall 14 using the attachment means that are inserted into the orifices 20, 21. The rotating ring 19 comprises on its inner face a protrusion 22. The protrusion 22 engages into the guide groove 18 with the result that the rotating ring 19 is guided during its rotating movement in the guide grove 18.

(6) FIG. 2 illustrates a sectional view of a portion of an electrical device in the form of a transformer 25 with a pluggable high-voltage feed-through 26 and a device connection part 27 so as to receive and contact the high-voltage feed-through 26. In the illustration in FIG. 2, the high-voltage feed-through 26 is inserted into the device connection part 27 of the transformer 25. The device connection part 27 is attached to a housing wall 28. The housing wall 28 defines a transformer housing of the transformer 25 that is filled with an insulating means, by way of example insulating oil. The attachment arrangement is configured so as to be insulating means-tight with the result that the insulating means may not escape from the housing. The device connection part 27 comprises a conductive connection part 29 so as to produce an electrical connection between the high-voltage feed-through 26 and the current connection line 41 of a winding, not illustrated in the figure, of the transformer 25 that is arranged within the housing that is filled with insulating oil. Identical and similar components are provided with identical reference numerals in the FIGS. 1 and 2.

(7) The high-voltage feed-through 26 comprises an inner conductor 2 that is designed in the illustrated example as a hollow conductor made from aluminum or copper. The inner conductor 2 is surrounded by an insulating body 3. The insulating body 3 comprises conductive control inserts 30a-c so as to perform a capacitive field control procedure, said control inserts being arranged in a concentric manner around the inner conductor 2. The control inserts 30a-c are separated from one another by means of insulating layers 31a-b that are made from a PET non-woven fabric and after being wound onto the inner conductor 2 are saturated with resin. The control inserts 30a-c are arranged in a radial spacing A of 2 mm with respect to one another.

(8) The high-voltage feed-through 26 comprises moreover a mating section 32 for inserting the high-voltage feed-through 26 into the device connection part 27. The mating section 32 comprises a conically tapering part of the insulating body 3 and a connection conductor section that is welded in the form of a conductor bolt 33 to the inner conductor 2. A pluggable contact system 34 that produces the electrical connection between the high-voltage feed-through 26 and the transformer 25 is adjacent to the conductor bolt 33.

(9) An intermediate space 35 between the mating section 32 of the high-voltage feed-through 26 and the device connection part 27 is filled with a silicone material that dielectrically strengthens the intermediate space 35.

(10) The high-voltage feed-through 26 comprises moreover an attachment flange 8 having a holding part 9 and a movable part 19 in the form of a rotating ring. The holding part 9 is fixed to the insulating body 2 of the high-voltage feed-through 26. The movable part 19 is concentric and is able to rotate about a longitudinal axis 4 of the high-voltage feed-through 26.

(11) So as to produce the electrical device 25, the high-voltage feed-through 26 is inserted into the device connection part 27 and in fact along the longitudinal axis 4 and in the direction that is indicated in FIG. 2 by an arrow 36. After the plug-in part 32 has been inserted into the device connection part 27, it is no longer possible to readjust the high-voltage feed-through 26 with respect to its rotational position. So as to align attachment elements 36a,b with respect to their intended position, the movable part 19 of the attachment flange 8 of the high-voltage feed-through 26 is rotated with respect to attachment elements 37a,b of the device connection part 27 about the longitudinal axis 4 of the high-voltage feed-through 26. Subsequently, the attachment flange 8 may be mechanically connected to the device connection part 27.

(12) It is apparent that the device connection part 27 comprises an attachment section 38 with which it is fixedly mounted on the housing wall 28. By way of example, suitable screw connections are used for this purpose. Sealing means, not illustrated in the figure, are provided in order to attach the device connection part 27 in an insulating means-tight manner to the housing wall 28.

(13) The device connection part 27 comprises moreover a receiving section 39 that is made from an electrically non-conductive material. In this case, the receiving section 39 tapers towards a closed end. At the closed end, the wall of the receiving section 39 is penetrated by a bolt-shaped connection part or contact part 29. At its section protruding into the interior space 40 or oil space of the housing, the contact part 29 is connected to a current connection line 41. The current connection line that is a winding connection line 41 in the illustrated exemplary embodiment is moreover equipped with a current sensor in the form of a current convertor (not illustrated in the figure). The current convertor is thus fixedly installed in the housing and is used so as to detect an electrical current that is flowing via the winding connection line 41 to or from the respective winding.

(14) The mating section 32 of the high-voltage feed-through 26 extends from the attachment flange 8 into the receiving section 39 of the device connection part 27. In this case, the outer wall of the silicone-filled intermediate space 35 that is connected in a positive-locking manner to the mating section 32 is designed in a complementary shape to that of the receiving section 39 with the result that the two components lie against one another in a precise fit and air or other inclusions may be avoided.