HIGH-VOLTAGE BUSHING AND HIGH-VOLTAGE INSTALLATION WITH THE BUSHING

Abstract

A high-voltage bushing has an internal conductor and an insulating body which surrounds the internal conductor along its longitudinal direction. The internal conductor is routed out of the insulating body at a head end of the high-voltage bushing. A fastening flange is arranged on the insulating body at an end opposite the head end. An outer housing encloses the internal conductor and the insulating body from the fastening flange up to and including the head end in a moisture-tight manner. A high-voltage installation has a high-voltage conductor which is routed through a housing wall of the high-voltage installation by way of the novel high-voltage bushing.

Claims

1. A high-voltage bushing, comprising: an internal conductor; a head end; an insulating body surrounding said internal conductor along a longitudinal direction thereof, said internal conductor being routed out of said insulating body at said head end of the high-voltage bushing; a fastening flange disposed on said insulating body; and an outer housing enclosing said internal conductor and said insulating body from said fastening flange up to and including said head end in a moisture-tight manner.

2. The high-voltage bushing according to claim 1, wherein said outer housing is formed of a plurality of separate housing elements and all of said separate housing elements of said housing are connected to one another by adhesive bonding.

3. The high-voltage bushing according to claim 2, wherein said housing comprises a head fitting at said head end, a foot fitting on said fastening flange, and a connecting pipe connecting said head fitting with said foot fitting.

4. The high-voltage bushing according to claim 3, wherein said head fitting is composed of a metal, and said head fitting includes an outer current contact and an inner current contact integrated into said housing.

5. The high-voltage bushing according to claim 3, wherein said head fitting is composed of a metal.

6. The high-voltage bushing according to claim 3, wherein said head fitting includes an outer current contact integrated into said housing.

7. The high-voltage bushing according to claim 3, wherein said head fitting includes an inner current contact integrated into said housing.

8. The high-voltage bushing according to claim 3, wherein said connecting pipe is composed of a glass fiber-reinforced plastic.

9. The high-voltage bushing according to claim 1, wherein: a secondary insulation is disposed between said housing and said insulating body; said high-voltage bushing comprises a device for filling said secondary insulation, said device having a filling channel which runs at least partially in said fastening flange and opens to a side averted from said housing, and wherein said filling channel can be closed.

10. The high-voltage bushing according to claim 9, wherein said secondary insulation comprises a polyurethane foam.

11. The high-voltage bushing according to claim 1, wherein said high-voltage bushing comprises a measurement connection for potential measurement, and said measurement connection is enclosed by said housing in a moisture-tight manner.

12. The high-voltage bushing according to claim 1, wherein said insulating body comprises electrically conductive control inserts for field control and insulating layers of resin-impregnated paper disposed to space said control inserts apart from one another.

13. A high-voltage installation, comprising: a housing and a high-voltage conductor routed through a housing wall of the housing of the high-voltage installation by way of a high-voltage bushing according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0035] The FIGURE is a schematic illustration of an exemplary embodiment of a high-voltage bushing according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0036] Referring now to the sole FIGURE of the drawing in detail, there is shown a high-voltage bushing 1 comprising an internal conductor 2 which extends along a longitudinal axis 3 of the high-voltage bushing 1. The internal conductor 2 is surrounded by an insulating body 4. The insulating body 4 comprises control inserts 5 for capacitively controlling the high-voltage bushing 1. The control inserts are separated from one another by insulating layers which are composed of resin-impregnated paper or a synthetic nonwoven.

[0037] The high-voltage bushing 1 further comprises a secondary insulation 6 which is composed of dry foam. The secondary insulation 6 fills an intermediate space between the insulating body 4 and an outer housing 7.

[0038] The outer housing 7 comprises a head fitting 71 at a head end 8 of the high-voltage bushing 1, a foot fitting 72 at a foot end 9, and also a connecting pipe 73. The connecting pipe 73 is composed of a glass fiber-reinforced plastic.

[0039] The high-voltage bushing 1 comprises a fastening flange 10 in order to fasten the high-voltage bushing 1 to a wall of a high-voltage installation 20. The fastening flange 10 forms a unit with the foot fitting 72 in the exemplary embodiment illustrated in the FIGURE.

[0040] Further insulation elements 11 which are composed of silicone are fitted to the outer housing 7.

[0041] The head fitting 71, which is composed of metal, encloses the insulating body 4, together with the internal conductor 2, in the region of the head end 8. The head fitting 71 comprises outer current contact means 711 for establishing an electrical connection with a high-voltage conductor (not illustrated). Furthermore, the head fitting 71 comprises inner current contact means 712 for connecting the internal conductor 2 to the head fitting 71. The inner current contact means 712 comprise an inner recess 713, which is dimensioned to receive the internal conductor, and also contact fins 714.

[0042] The foot fitting 72 comprises a device 12 for filling the secondary insulation. The device 12 has a filling channel 13. The filling channel 13 runs between the intermediate space, which is to be filled, between the insulating body 4 and the housing 7 and that side 14 of the fastening flange 10 which faces away from the head end 8. If the high-voltage bushing 1 is mounted on the wall of the high-voltage installation 20, the opening 15 of the filling channel is concealed by the wall. The opening 15 is additionally closed by a seal 16.

[0043] The foot fitting 72 furthermore comprises a lateral bore for a potential output with a measurement connection 16 for potential measurement. The measurement connection 16 is enclosed by a lateral pipe 17 which is composed of glass fiber-reinforced plastic and a hood 18 which is composed of metal. The hood 18 contains an inner and an outer connection for connecting the measurement connection 16 to a separate measuring apparatus (not illustrated) or a fixed potential.

[0044] The head fitting 71, the foot fitting 72, the connecting pipe 73, the lateral pipe 17 and the hood 18 are connected to one another in a sealed manner by means of adhesive bonding. That is, a suitable adhesive or glue is used to connect the various elements constituting the outer housing to one another so as to provide a moisture-sealed housing. The connecting pipe 73 and the lateral pipe 17 are additionally siliconized, that is to say provided with a silicone coating, at their points which are accessible from the outside.