Cable termination for connecting a switchgear assembly to a high-voltage cable

Patent metadata

Field	Value
Publication number	US-9787006-B2
Application number	US-201715397546-A
Country	US
Kind code	B2
Filing date	Jan 3, 2017
Priority date	Jul 1, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A cable termination comprises, amongst other things, three insulated cable connection elements which project into a housing and have an internal conductor, and also three phase connection parts which are designed as hollow bodies and likewise project into the housing from a side which is situated opposite the cable connection elements and into each of which one of three cable end reinforcements can be inserted. The cable connection elements and the phase connection parts each form the corners of a triangle. These triangles are rotated in relation to one another in their respective plane, so that an offset is created. In order to bridge the offset, a connecting element is arranged between in each case one cable connection element and the associated phase connection part, the said connecting element being designed such that it can be partially or entirely removed in order to establish an isolating gap.

First claim

The invention claimed is:

1. A cable termination for connecting a switchgear assembly to a high-voltage cable, comprising
at least one housing,
three insulated cable connection elements which protrude into the housing and have an internal conductor for establishing an electrical connection of the switchgear assembly to in each case one cable end reinforcement which is fitted to the end of a phase of a high-voltage cable,
three phase connection parts which likewise protrude into the housing from a side which is situated opposite the cable connection elements, which are designed as hollow bodies and into which in each case one of the cable end reinforcements is to be inserted, wherein
the insulated cable connection elements are arranged in a first plane, which runs perpendicular to the entry direction of the cable connection elements into the housing, such that they form the corners of a first triangle,
the phase connection parts are arranged in a second plane, which is parallel to the first plane, such that they form the corners of a second triangle,
the respective corner of the first triangle, which corner corresponds to a cable connection element, and the respective corner of the second triangle, which corner corresponds to a phase connection part which is to be connected to the cable connection element, form two corners which are associated with one another,
the first triangle and the second triangle are rotated in relation to one another within their respective plane, wherein the rotation takes place starting from a position in which, in a plan view perpendicular to the first and second plane, the distances between the respectively associated corners of the first and of the second triangle assume a value which is as small as possible, and
a connecting element is arranged between in each case one cable connection element and the associated phase connection part.

2. The cable termination according to claim 1 , wherein the connecting elements are of rotatable design at a contact point with their associated cable connection element and/or the associated phase connection part.

3. The cable termination according to claim 1 , wherein the connecting elements are of multipartite design.

4. The cable termination according to claim 1 , wherein the first triangle of a first embodiment of the housing with a first longitudinal extent is selected to be the same size as the first triangle of a second embodiment of the housing with a second longitudinal extent which differs from the first longitudinal extent, and in that the first triangle and the associated second triangle are rotated in relation to one another in both embodiments until the distances between the associated corners of the triangles of the first embodiment are approximately the same size as the distances between the associated corners of the triangles of the second embodiment.

5. The cable termination according to claim 1 , wherein the connecting line between a first marked point of the first triangle and a second marked point of the second triangle runs perpendicular to the first and, respectively, second plane and the rotation takes place about the axis which is formed by the connecting line, wherein the marked points are at least one of the orthocenter, the circumcenter, the incenter or the centroid of the respective triangle.

6. The cable termination according to claim 1 , wherein at least the first triangle or the second triangle is an isosceles triangle or equilateral triangle.

7. The cable termination according to claim 6 , wherein the first triangle and the second triangle are each an equilateral triangle, the rotation of said triangles takes place about the connecting line of the center point of the two triangles.

8. The cable termination of claim 6 , wherein at least the first triangle or the second triangle is an isosceles triangle.

9. The cable termination according to claim 1 , wherein the internal conductors of the cable connection elements and the phases of the high-voltage cable within the housing are oriented parallel to one another in a first direction, and the connecting elements each bridge an offset, which is produced on account of the rotation, between the cable connection element and the associated phase connection part.

10. The cable termination according to claim 9 , wherein the connecting elements are each connected to their associated cable connection element and/or to the associated phase connection part in a releasable manner.

11. The cable termination according to claim 9 , wherein the connecting elements are of rotatable design at a contact point with their associated cable connection element and/or the associated phase connection part.

12. The cable termination according to claim 9 , wherein the connecting elements are of multipartite design.

13. The cable termination according to claim 9 , wherein the first triangle of a first embodiment of the housing with a first longitudinal extent is selected to be the same size as the first triangle of a second embodiment of the housing with a second longitudinal extent which differs from the first longitudinal extent, and in that the first triangle and the associated second triangle are rotated in relation to one another in both embodiments until the distances between the associated corners of the triangles of the first embodiment are approximately the same size as the distances between the associated corners of the triangles of the second embodiment.

14. The cable termination according to claim 1 , wherein the connecting elements are each connected to their associated cable connection element and/or to the associated phase connection part in a releasable manner.

15. The cable termination according to claim 14 , wherein the connecting elements are of rotatable design at a contact point with their associated cable connection element and/or the associated phase connection part.

16. The cable termination according to claim 14 , wherein the connecting elements are of multipartite design.

17. The cable termination of claim 14 , wherein the releasable manner is a screwable or pluggable manner.

18. A combination comprising:
a switchgear assembly;
a high-voltage cable:
a cable termination connecting, comprising
at least one housing,
three insulated cable connection elements which protrude into the housing and have an internal conductor for establishing an electrical connection of the switchgear assembly to in each case one cable end reinforcement which is fitted to the end of a phase of a high-voltage cable,
three phase connection parts which likewise protrude into the housing from a side which is situated opposite the cable connection elements, which are designed as hollow bodies and into which in each case one of the cable end reinforcements is to be inserted, wherein
the insulated cable connection elements are arranged in a first plane, which runs perpendicular to the entry direction of the cable connection elements into the housing, such that they form the corners of a first triangle,
the phase connection parts are arranged in a second plane, which is parallel to the first plane, such that they form the corners of a second triangle,
the respective corner of the first triangle, which corner corresponds to a cable connection element, and the respective corner of the second triangle, which corner corresponds to a phase connection part which is to be connected to the cable connection element, form two corners which are associated with one another,
the first triangle and the second triangle are rotated in relation to one another within

Assignees

• Abb Schweiz Ag

Inventors

• Probst Heinrich
• Prajapati Chetan
• Hallas Martin
• Desch Michael

Classifications

• H01R9/11 Primary

  End pieces for multiconductor cables supported by the cable and for facilitating connections to other conductive members {, e.g. for liquid cooled welding cables} · CPC title

• H01R13/53

  Bases or cases for heavy duty; Bases or cases {for high voltage} with means for preventing corona or arcing · CPC title

• H02G15/22

  Cable terminations · CPC title

• H02B13/0358 Primary

  Connections to in or out conductors (connectors in general H01R) · CPC title

• H01R24/86

  Parallel contacts arranged about a common axis · CPC title