INSULATION MEDIUM FOR AN ELECTRIC ENERGY TRANSFER DEVICE

Abstract

An insulation medium for an electric energy transfer device. The insulation medium is a fluid at room temperature and at atmospheric pressure and the insulation medium includes at least the following components: >50 vol. % to <99 vol. % synthetic air, and >1 vol. % to <50 vol. % of an organic fluorine compound. Oxygen may be present at no more than 0.5 vol. %, or no more than 0.1 vol. %, or less.

Claims

1-10 (canceled)

11. An insulation medium for an electrical energy transfer device, the insulation medium comprising: an insulation medium composition being a fluid at room temperature and at atmospheric pressure; said insulation medium composition having the following constituents: nitrogen at ≥75% by volume to ≤99% by volume; and at least one organic fluorine compound at ≥1% by volume to ≤15% by volume; oxygen in the insulation medium at a content of <0.5% by volume.

12. The insulation medium according to claim 11, wherein oxygen and water are collectively present in the insulation medium composition at ≤0.1% by volume.

13. The insulation medium according to claim 11, wherein the insulation medium composition comprises: nitrogen from ≥94% by volume to ≤97% by volume; and at least one organic fluorine compound from ≥3% by volume to ≤7% by volume.

14. The insulation medium according to claim 11, wherein said insulation medium composition consists of nitrogen and at least one organofluorine compound.

15. The insulation medium according to claim 11, wherein the at least one organofluorine compound is a fluoronitrile.

16. A method of insulating an electrical energy transfer device, the method comprising filling an insulation medium according to claim 11 into the electrical energy transfer device to form an electrically insulating atmosphere in the fluid-insulated electrical energy transfer device.

17. A fluid-insulated electrical energy transfer device, comprising: a fluid-tightly sealed insulation space; and an amount of insulation medium according to claim 11 disposed in said insulation space or in a reservoir to be connected to said insulation space.

18. The electrical energy transfer device according to claim 17 being one of a high-voltage switch or a fluid-insulated tubular conductor.

19. The electrical energy transfer device according to claim 17, comprising: a high-voltage switch having said insulation space; said high-voltage switch including a first switch unit and a second switch unit disposed in said insulation space of said high-voltage switch, wherein said first switch unit has at least one of a disconnector or a grounding switch, and wherein said second switch unit has a circuit breaker.

20. The electric energy transfer device according to claim 19, wherein said high-voltage switch further comprises a third switch unit disposed in said insulation space and said third switch unit has at least one of a disconnector or a grounding switch.

21. The electric energy transfer device according to claim 19, wherein said circuit breaker is a vacuum circuit breaker.

Description

[0084] Further details, features and advantages of the subject matter of the invention are apparent from the dependent claims and from the description of the figure that follows and the corresponding example. The figure shows:

[0085] FIG. 1 a schematic of a configuration of a high-voltage switch as electrical energy transfer device according to the present invention.

[0086] FIG. 1 shows a schematic example of a configuration of electrical energy transfer device in the form of a high-voltage switch 10 according to the invention.

[0087] The high-voltage switch 10 comprises a gas-tightly sealed insulation space 12 with an insulation medium 13 disposed therein, as described in detail hereinafter.

[0088] It is also shown that a first arrangement 14 composed of first switching unit 16 is disposed in the insulation space 12. Also disposed in the insulation space 12 is a second arrangement 18 composed of first switching units 16. The first switching unit 16 is configured as a combined grounding switch and disconnector. The first arrangement 14 of the second arrangement 18 thus each bear switching units 16 having grounding switches and disconnectors.

[0089] Likewise disposed within the insulation space 12 is a second switching unit 20. The second switching unit 20 comprises a circuit breaker and is preferably configured as a vacuum switch. The vacuum switch has a switching space with a separable contact, with an illustrative pressure of not more than 10.sup.−6 bar in the switching space. This shows that the insulation space 12 is divided by gas-tightly or gas-permeably configured divisions 11 into a multitude of regions 15, with all regions 15 of the insulation space 12 in this configuration filled with the insulation medium 13.

[0090] As an alternative to this configuration, it could also be the case that the first switching unit 16 constitutes merely a grounding switch and, correspondingly, a third switching unit comprising the disconnector would be provided. The third switching units would then be part of the first arrangement 14 and of the second arrangement 18, or of further arrangements that are not shown.

[0091] Also shown are a control cabinet 22, by means of which the high-voltage switch 10 can be controlled and which sits on a console 24.

[0092] In order to operate the vacuum switch as second switching unit 20, also provided is a spring energy storage drive 26 with a circuit breaker control drive. Also shown are a voltage transducer 28 and a fast-action grounding switch 30. Finally, FIG. 1 also shows an output module 32 with further disconnectors and grounding switches, and a sealed cable end 34.

[0093] Coming back to the insulation space 12 and the insulation medium 13 disposed therein, it is preferably the case that this is that a positive pressure, where the positive pressure may, for example, be within a range from not less than 4 bar to not more than 10 bar. Thus, the entire insulation space 12 is gas-tight even in the case of a corresponding positive pressure.

[0094] The insulation medium 13 is also configured in that it has the following constituents: [0095] nitrogen in a content of ≥75% by volume to ≤99% by volume; and [0096] at least one organic fluorine compound in a content of ≥1% by volume to ≤15% by volume, where oxygen is present in the insulation medium in a content of <0.5% by volume, where
the fluorine compound may include, for example, fluoro-nitriles, for instance, perfluoronitriles, fluoroethers, for instance hydrofluoromonoethers, fluoroolefins, for instance hydrofluoroolefins, and fluoroketones, for instance perfluoroketones.

[0097] In addition, oxygen and, for example, fundamentally different compounds are present in the insulation medium in a content of <0.5% by volume.

[0098] For example, the insulation medium 13 may consist of nitrogen and the at least one organic fluorine compound, such that the insulation medium 13 is essentially free of at least one of water, carbon dioxide and sulfur hexafluoride.

[0099] Further by way of example, it may be the case that the insulation medium 13 includes: [0100] nitrogen in a content of ≥94% by volume to ≤97% by volume; and [0101] at least one organic fluorine compound in a content of ≥3% by volume to ≤7% by volume.

[0102] The individual combinations of the constituents and of the features of the executions mentioned in each case are illustrative; the exchange and substitution of these teachings for other teachings present in this publication with the publications cited are likewise explicitly contemplated. It will be apparent to the person skilled in the art that variations, modifications and other executions that are described here may likewise occur without departing from the concept of the invention and the scope of the invention.

[0103] Correspondingly, the above description should be considered by way of example and not in a limiting manner. The word “comprise” used in the claims does not rule out other constituents or steps. The indefinite article “a” does not rule out the meaning of a plural. The mere fact that particular dimensions are recited in mutually different claims does not mean that a combination of these dimensions cannot be utilized advantageously. The scope of the invention is defined in the claims that follow and the corresponding equivalents.