ELECTRICAL SWITCHING ARRANGEMENT

Abstract

A switching arrangement has a plurality of at least two contact arrangements and a blasting arrangement for blasting the contact arrangements with insulation gas. The at least two contact arrangements each have a first contact piece and a second contact piece which can be moved relative to one another in order to form an electrical connection when the first contact piece and the second contact piece are in contact and to form an insulation zone when the contact pieces are isolated from one another. The blasting arrangement has at least two blowing volumes, wherein a first contact arrangement can be supplied with insulation gas by a first blowing volume and wherein a second contact arrangement can be supplied with insulation gas by a second blowing volume.

Claims

1-10. (canceled)

11. A switching configuration, comprising: a plurality of contact configurations having at least two said contact configurations, each of said contact configurations containing contact pieces including a first contact piece and a second contact piece which can move relative to each other in order to form an electrical connection in a state in which said first contact piece and said second contact piece touch each other, and to form an insulating gap in a state in which said first contact piece and said second contact piece are isolated from each other; and a blasting configuration for blasting said contact configurations with insulating gas, said blasting configuration having a plurality of blasting volumes, wherein a first contact configuration of said contact configurations being supplied with said insulating gas by a first blasting volume of said blasting volumes, and wherein a second contact configuration of said contact configurations being supplied with said insulating gas by a second blasting volume of said blasting volumes.

12. The switching configuration according to claim 11, wherein a third blasting volume of said blasting volumes and a third contact configuration of said contact configurations are provided, wherein said third contact configuration being supplied with said insulating gas by said third blasting volume.

13. The switching configuration according to claim 12, wherein said first contact configuration is supplied with said insulating gas exclusively by said first blasting volume, and that said second contact configuration is supplied with said insulating gas exclusively by said second blasting volume.

14. The switching configuration according to claim 11, wherein said first blasting volume and said second blasting volume are formed so that they are gas-tight relative to one another.

15. The switching configuration according to claim 12, wherein said blasting configuration has a volume-displacement piston-and-cylinder configuration, wherein at least one of said contact pieces from said first contact configuration and from said second contact configuration is disposed so that said at least one contract piece is stationary on said volume-displacement piston-and-cylinder configuration.

16. The switching configuration according to claim 15, wherein said volume-displacement piston-and-cylinder configuration has a wall, and said at least one contact piece is placed onto said wall of said volume-displacement piston-and-cylinder configuration.

17. The switching configuration according to claim 16, wherein: said wall is a common wall element; said volume-displacement piston-and-cylinder configuration is one of a plurality of piston-and-cylinder configurations including a first piston-and-cylinder configuration and a second piston-and-cylinder configuration; a contact piece of said contact pieces of said first contact configuration and a contact piece of said contact pieces of said second contact configuration are disposed on said common wall element; and said common wall element forms a wall of said first piston-and-cylinder configuration and said second piston-and-cylinder configuration.

18. The switching configuration according to claim 16, wherein: said wall has separate wall elements; a contact piece of said contact pieces of said first contact configuration and a contact piece of said contact pieces of said second contact configuration are disposed in each case on one of said separate wall elements; and said separate wall elements in each case form a separate wall of said first piston-and-cylinder configuration and said second piston-and-cylinder configuration.

19. The switching configuration according to claim 11, wherein at least one of said blasting volumes is filled at least partly with synthetic air.

20. The switching configuration according to claim 13, wherein said third contact configuration is supplied with said insulating gas exclusively by said third blasting volume.

21. The switching configuration according to claim 12, wherein said first blasting volume, said second blasting volume, and said third blasting volume are formed so that they are gas-tight relative to one another.

22. The switching configuration according to claim 12, wherein: said blasting configuration has a volume-displacement piston-and-cylinder configuration; at least one of said contact pieces from said first contact configuration, from said second contact configuration, and from said third contact configuration is disposed so that said at least one contact piece is stationary on said volume-displacement piston-and-cylinder configuration.

23. The switching configuration according to claim 16, wherein said at least one contact piece is inserted into said wall of said volume-displacement piston-and-cylinder configuration.

24. The switching configuration according to claim 16, wherein: said wall is a common wall element; said volume-displacement piston-and-cylinder configuration is one of a plurality of piston-and-cylinder configurations including a first piston-and-cylinder configuration, a second piston-and-cylinder configuration, and a third piston-and-cylinder configuration; a contact piece of said contact pieces of said first contact configuration, a contact piece of said contact pieces of said second contact configuration, and a contact piece of said contact pieces of said third contact configuration are disposed on said common wall element; and said common wall element forms a wall of said first piston-and-cylinder configuration, said second piston-and-cylinder configuration, and said third piston-and-cylinder configuration.

25. The switching configuration according to claim 16, wherein: said wall has separate wall elements; a contact piece of said contact pieces of said first contact configuration, a contact piece of said contact pieces of said second contact configuration, and a contact piece of said contact pieces of said third contact configuration are disposed in each case on one of said separate wall elements; and said separate wall elements in each case form a separate wall of said first piston-and-cylinder configuration, said second piston-and-cylinder configuration, and said third piston-and-cylinder configuration.

26. A gas-insulated switchgear, comprising: said switching configuration according to claim 11.

Description

[0047] Further details, features, and advantages of the subject of the invention result from the subclaims and from the following description of the drawing and the associated example. In the drawing:

[0048] FIG. 1 schematically shows a view in section of an embodiment of a switching arrangement according to the invention from the side.

[0049] A view in section of an embodiment of a switching arrangement according to the invention from the side is shown in FIG. 1. Such a switching arrangement 10 can in particular be part of gas-insulated switchgear.

[0050] The switching arrangement 10 according to FIG. 1 comprises a plurality of at least two contact arrangements 12. Specifically, three contact arrangements 12a, 12b, 12c are shown in FIG. 1, wherein this embodiment is to be understood as not restrictive. The contact arrangements 12a, 12b, 12c each comprise a first contact piece 14a, 14b, 14c and a second contact piece 16a, 16b, 16c which can move relative to each other in order to form an electrical connection in a state in which the first contact piece 14a, 14b, 14c and the second contact piece 16a, 16b, 16c touch each other and a state in which they form an insulating gap when they are isolated from each other. A state in which the contact pieces 14a, 14b, 14c and 16a, 16b, 16c touch each other is shown in FIG. 1. More precisely, the first contact pieces 14a, 14b, 14c are formed as contact pins which are arranged in a socket, wherein the socket forms the second contact piece 16a, 16b, 16c.

[0051] A blasting arrangement 18 is moreover provided which serves to blast the contact arrangements 12a, 12b, 12c with insulating gas 20, for example with synthetic air. The blasting arrangement 18 has three blasting volumes 22a, 22b, 22c, wherein the contact arrangements 22a, 22b, 22c can each be supplied selectively with insulating gas 20 from a blasting volume 22a, 22b, 22c. More precisely, a blasting volume 22a, 22b, 22c is assigned to each contact arrangement 12a, 12b, 12c such that each contact arrangement 12a, 12b, 12c can be supplied with insulating gas 20 exclusively by a blasting volume 22a, 22b, 22c. The different blasting volumes 22a, 22b, 22c are here formed so that they are gas-tight relative to one another such that the exchange of gas between the individual blasting volumes 22a, 22b, 22c is not possible.

[0052] With regard to the blasting arrangement 18, FIG. 1 shows that the blasting arrangement 18 has a volume-displacement piston-and-cylinder arrangement 24a, 24b, 24c, wherein the second contact pieces 16a, 16b, 16c of the respective contact arrangement 12a, 12b, 12c are arranged so that they are stationary on the piston-and-cylinder arrangement 24a, 24b, 24c. More precisely, it is provided that the second contact pieces 16a, 16b, 16c are placed on a wall 26 of the piston-and-cylinder arrangement 24a, 24b, 24c, in particular is inserted into a wall 26 of the piston-and-cylinder arrangement 24a, 24b, 24c. A common wall 26 for all three piston-and-cylinder arrangements 24a, 24b, 24c is thus provided.

[0053] The respective blasting volumes 22a, 22b, 22c is moreover connected to the corresponding contact arrangement 12a, 12b, 12c by a blowout duct 28a, 28b, 28c through which the insulating gas 20 can flow from the blasting volume 22a, 22b, 22c to the corresponding contact arrangement 12a, 12b, 12c.

[0054] Such a switching arrangement 10 can work as follows.

[0055] When isolating the contact arrangements 12a, 12b, 12c, the second contact pieces 16a, 16, 16c are shifted, together with the wall 24, to the right in FIG. 1 such that the blasting volumes 22a, 22b, 22c are reduced. This has the result that the insulating gas 20 flows through the blowout duct 28a, 28b, 28c to the corresponding contact arrangement 12a, 12b, 12c. A discharge opening of the blowout duct 28a, 28b, 28c can here open out at the switching gap. Efficient blasting of the switching gap can be performed as a result. It is thus, for example, possible to cool the switching gap or to evacuate foreign matter such as the products of erosion, etc from the switching gap and to promote dielectric strengthening of the switching gap.

[0056] Kinematics 30 by means of which rear walls 32a, 32b, 32c of the piston-and-cylinder arrangement 24a, 24b, 24c can be displaced in order to vary the blasting volumes 22a, 22b, 22c is moreover shown.