DE202014003207U1 - Electrical device for the generation, transmission, distribution and / or use of electrical energy - Google Patents

Abstract

Electrical device (1) for the generation, distribution, transmission and / or use of electrical energy, the electrical device (1) comprising a housing (2; 100, 140, 160, 161, 180, 190, 210) which has an interior (3; 102, 142, 162, 163, 182, 192, 242), whereby at least a part of the interior (3; 102, 142, 162, 163, 182, 192, 242) of the electrical device encloses at least two insulation compartment compartments (102 , 142, 162, 163, 182, 192, 242), which are separate from one another and arranged in a successive manner, and in each of the isolation space compartments (102, 142, 162, 163, 182, 192, 242) an electrical component (4; 10, 12a, 12b; 14, 14 '; 16a, 16a', 16b; 184; 194; 22; 24) is arranged, which is surrounded by an insulation fluid, at least one first insulation compartment (102; 142; 162 ; 163; 182; 192; 242) comprises a first insulation fluid and at least one second insulation space compartment (142; 162; 163; 182; 192; 242; 102) comprises a second isolation fluid, at least one of the first and second isolation fluids comprising an organofluorine compound comprising at least two carbon atoms and the second isolation fluid being different from the first isolation fluid.

Description

The present invention relates to an electrical device for the generation, transmission, distribution and / or use of electrical energy.

It is known to use dielectric isolation media in liquid or gaseous form in a wide variety of devices, and in particular also in gas-insulated switchgear or parts thereof, for the isolation of an electrically conductive part.

For example, in metal-enclosed medium or high voltage switchgear, the electrically conductive part is disposed in a gas tight housing defining an isolation space containing an isolation gas and isolating the housing from the electrically conductive part, preventing electrical current from being conducted through the isolation space , For interruptions of the current in, for example, a high-voltage switchgear, the isolation medium also acts as an arc extinguishing medium (or "quenching" medium).

In conventional gas-insulated switchgear typically sulfur hexafluoride (SF ₆ ) is used as the isolation medium and / or quenching medium.

Recently, the use of Organofluorverbindungen in an isolation medium as a replacement for conventional isolation media, such as. As air proposed. In particular, disclosed WO 2010/142346 a dielectric insulating medium containing a fluoroketone containing 4 to 12 carbon atoms. Further disclosed WO-A-2012/080246 specifically, a fluoroketone having exactly 5 carbon atoms (hereinafter referred to as "C5K") in a mixture with a dielectric insulating gas component other than C5K.

In the WO 2010/142346 and WO-A-2012/080246 disclosed fluoroketones have high insulating properties, in particular a high dielectric strength and good arc extinguishing properties. At the same time, they have a very low global warming potential (GWP) and very low toxicity.

Notwithstanding the above-mentioned, outstanding characteristics of e.g. For example, an insulating gas containing a fluoroketone has unexpectedly been found to have the optimum composition for power interruption or arc quenching not necessarily also resulting in the best dielectric isolation properties, and vice versa.

Further, organofluorine compounds can lead to problems with their compatibility with specific material components of the electrical device while being fully compatible with the material of other components. This is of particular importance when the isolation medium is used in an electrical device in which a plurality of different electrical components are arranged in successive chambers, as e.g. B. in a switchgear is the case because for a specific electrical component or chamber, the optimally selected isolation medium does not necessarily have to be identical with the optimally selected isolation medium of another electrical component or chamber.

Against this background, the problem to be solved by the present invention is to provide an electrical device which comprises at least two electrical components which are arranged in successive compartments (in particular fluid-tight or gas-tight) separate compartments. and / or arc extinguishing properties of the electrical device as a whole are increased.

The object is achieved by the electrical device according to claim 1. Preferred embodiments are defined in the dependent claims or claim combinations or will be apparent from the following description and the figure.

According to claim 1, the present invention thus relates to an electrical device for the generation, distribution and / or use of electrical energy. The electrical device comprises a housing which encloses an interior of the electrical device, of which at least one part forms at least two isolation space compartments, which are separated from one another and arranged in successive fashion.

In each of the isolation compartment compartments an electrical component is arranged, which is surrounded by an insulating fluid. Thus, a first isolation space compartment contains a first isolation fluid and a second isolation space compartment contains a second isolation fluid, wherein at least one of the first and second isolation fluids contains an organofluorocompound containing at least two carbon atoms, and wherein the second isolation fluid is different from the first isolation fluid.

The present invention makes use of the finding that, while specific insulating fluids, particularly alternative organofluorine compounds and background gas-containing insulating fluids, are very well suited for some specific applications and may represent a comparable or better alternative to conventional isolation gases, there are other applications as well. for which other insulation fluids, in particular conventional insulation gases or z. B. alternative insulating fluids comprising the same or different Organofluorverbindungen in mixture with another background gas, are most suitable. Thus, for each isolation compartment compartment of the electrical device, that specific isolation fluid may be chosen which is most suitable.

In another aspect, the present invention also allows to address problems that might arise from different ambient temperature requirements affecting the maximum density, particularly of the organofluorine compound, as well as problems resulting from standards such as IEC 62271-1 which reduce the maximum allowable temperature for certain materials in the device, thus limiting the use of certain materials, which in turn limits the ability to use an insulating fluid having optimum composition for insulation and / or arc quenching properties.

The feature of the present invention that the second insulating fluid is different from the first insulating fluid is to be interpreted broadly and includes, for example, FIG. For example, both embodiments in which the isolation fluids differ in their composition including a background gas (if any), as well as embodiments in which the isolation fluids differ in their gas density. Of course, insulating fluids, which differ in their composition and at the same time in their gas density from each other, also different in the context of the present invention. In addition, the feature that the second isolation fluid is different from the first isolation fluid is to be interpreted to include embodiments in which a difference in composition and / or gas density is present from the beginning, i. H. immediately after filling the respective isolation compartment compartments (according to a preferred case), as well as embodiments in which a difference in composition and / or gas density is formed over time (according to an alternative case). The latter is particularly true for embodiments in which the composition of an insulating fluid surrounding a switching component is subject to change during a switching operation, e.g. B. as a result of degradation and / or recombination. This change in the composition of the insulating fluid compared to the initial composition is generally also present by refilling the corresponding isolation compartment compartment.

The term "isolation fluid" is to be interpreted as encompassing any dielectric fluid, but excludes solid isolation components. The term "isolation fluid" according to the present invention is further specified by the feature that it is included in an isolation compartment compartment. Consequently, ambient air that is not trapped in an isolation compartment compartment can not be considered as an isolation fluid in the sense of the present invention.

To insure that the optimum isolation fluid composition and / or gas density adjusted for each electrical component is stable over time, the isolation compartment compartments are typically separated from each other in a fluid-tight, and in particular, gas-tight manner.

According to a further preferred embodiment, the first insulating fluid and the second insulating fluid are at least partially in the gas phase. However, it is conceivable that in at least one of the isolation compartment compartments, the isolation fluid is present at least partially in the liquid phase. In particular, embodiments are preferred in which the isolation fluid contains a two-phase system comprising a gaseous and a liquid portion.

As will be discussed in more detail below, the first isolation fluid and the second isolation fluid are preferably a mixture of chemical compounds.

As mentioned, at least one of the first and second isolation fluids comprises an organofluoro compound containing at least two carbon atoms.

In particular, the organofluoro compound is selected from the group consisting of fluoroethers (including fluoropolyethers, eg Galden), in particular hydrofluoromonoethers, fluoramines, fluoroketones (including fluoropolyketones), in particular perfluoroketones, fluoroolefins, in particular hydrofluoroolefins, and mixtures and / or decomposition products thereof because these classes of compounds have very high insulating properties, in particular a high dielectric strength (or breakdown field strength), and at the same time a low global warming potential and a low toxicity.

The invention encompasses embodiments in which the isolation medium contains either a single compound selected from the group consisting of fluoroethers, in particular hydrofluoromonoethers, fluoramines, fluoroketones, in particular perfluoroketones, and fluoroolefins, in particular hydrofluoroolefins, or else a mixture of at least two compounds of this group.

It is further preferred that at least one isolation compartment compartment contains a background gas, in particular selected from the group consisting of: air, an air component, nitrogen, oxygen, carbon dioxide, a nitrogen oxide, and mixtures thereof. This includes both embodiments in which one or more isolation space compartments contain a background gas in addition to the organofluorine compound, as well as embodiments in which one or more isolation space compartments contain only the background gas, i. H. consist essentially of the background gas.

The term "fluoroether" as used in the context of the present invention includes fluoropolyethers, especially galdene, perfluoroethers, d. H. fully fluorinated ethers, as well as hydrofluoroethers, d. H. Ethers that are only partially fluorinated. The term "fluoroether" includes both saturated compounds and unsaturated compounds, i. H. Compounds with at least one double or triple bond. The at least partially fluorinated alkyl chains of the fluoroether may be both branched and linear.

The term "fluoroether" also includes both non-cyclic and cyclic ethers. Thus, the alkyl groups attached to the oxygen atom of the ether group can optionally form a ring. In particular, the term "fluoroether" includes fluorooxiranes. In a particular embodiment, the organofluoro compound according to the present invention is a perfluoroxirane or a hydrofluoroxirane, specifically a perfluoroxirane or hydrofluoroxirane having from 3 to 15 carbon atoms.

Preferably, the corresponding isolation medium comprises a hydrofluoromonoether having at least three carbon atoms. In addition to their high dielectric (breakdown) strength, these hydrofluoromonoes are chemically and thermally stable up to temperatures above 140 ° C. Incidentally, they are non-toxic or have only low toxicity. In addition, they are non-corrosive and non-explosive.

As used herein, the term "hydrofluoromonoether" refers to a compound having only a single ether group to which are bonded two alkyl groups, which may independently be straight or branched, and which may optionally form a ring. The connection is thus completely different than the z. In US-B-7128133 disclosed compounds which relates to the use of compounds having two ether groups, ie hydrofluorodiethers, in heat transfer fluids. The term "hydrofluoromonoether" is further to be understood that the monoether is only partially fluorinated, that is still having hydrogen atoms. The term is further understood to include a mixture of different hydrofluoromonoethers.

As mentioned above, hydrofluoromonoethers having at least three carbon atoms have a relatively high dielectric strength. In particular, the ratio of the dielectric strength of the hydrofluoro-monoethers according to the present invention to the dielectric strength of SF _{6 is} more than 0.4.

As also mentioned, hydrofluoromonoethers also have a low global warming potential (GWP). Preferably, the GWP is less than 1'000 over 100 years, especially less than 700 over 100 years. The hydrofluoro-monoethers mentioned here have a relatively low atmospheric lifetime and are also free of halogen atoms, which play a role in the catalytic cycle of ozone depletion, namely Cl, Br or I. Their ozone depletion potential (ODP) is 0, which is more ecological View is very beneficial.

The preference for a hydrofluoromonoether having at least three carbon atoms and thus a relatively high boiling point higher than -20 ° C is based on the finding that a high boiling point of the hydrofluoromonoether is generally associated with high dielectric strength.

According to further embodiments, the hydrofluoromonoether contains exactly three or four or five or six carbon atoms, preferably exactly three or four carbon atoms, and most preferably exactly three carbon atoms.

In particular, the hydrofluoromonoether is a compound selected from the group consisting of the compounds defined by the following structural formulas, wherein a part of the hydrogen atoms is in each case substituted by a fluorine atom:

By using a hydrofluoromonoether having three or four carbon atoms, liquefaction does not occur under typical operating conditions of the electrical device. Thus, a dielectric insulating fluid can be obtained whose connections are all in the gaseous state under operating conditions of the device.

With regard to the flammability of the compounds, it is further preferred that the ratio of the number of fluorine atoms to the total number of fluorine or hydrogen atoms, the so-called "F-rate", of the hydrofluoromonoether is at least 5: 8. It has been found that compounds covered by this definition are generally non-flammable and thus result in an insulating fluid which meets the highest safety standards.

Further, it is preferable that the ratio of the number of fluorine atoms to the number of carbon atoms, which is referred to herein as the "F / C ratio", is in a range of 1.5: 1 to 2: 1. Such compounds generally have a GWP of less than 1000 over 100 years and are thus very environmentally friendly. Most preferably, the hydrofluoromonoether has a GWP of less than 700 over 100 years.

According to further embodiments of the present invention, the hydrofluoromonoether has the general structure (O): C _a H _b F _c -OC _d H _e F _f (O), in the
a and d independently of one another are an integer from 1 to 3, with a + d = 3 or 4 or 5 or 6, in particular 3 or 4,
b and c are independently an integer from 0 to 11, in particular 0 to 7, with e + f = 2d + 1, further at least one of b and e has the value 1 or greater and at least one of c and f the Value 1 or greater.

It is further preferred that in the general structure or formula (O) of the hydrofluoromonoether:
a is 1,
b and c are independently an integer from 0 to 3 with b + c = 3, d = 2,
e and f are independently an integer from 0 to 5 with e + f = 5, further wherein at least one of b and e is 1 or greater and at least one of c and f is 1 or greater.

According to a more preferred embodiment, exactly one of c and f in the general structure (O) is 0. The corresponding arrangement in which fluorine atoms are grouped on one side of the ether bond and the other side is unsubstituted is called "segregation". It has been found that segregation reduces the boiling point compared to non-segregated compounds of the same chain length. This feature is thus of particular interest, especially since compounds with longer chain length, which thus allow higher dielectric strengths, can be used without the risk of liquefaction under operating conditions.

Most preferably, the hydrofluoromonoether is selected from the group consisting of pentafluoroethyl methyl ether (CH ₃ -O-CF ₂ CF ₃ ) and 2,2,2-trifluoroethyl trifluoromethyl ether (CF ₃ -O-CH ₂ CF ₃ ).

Pentafluoroethyl methyl ether has a boiling point of + 5.25 ° C and a GWP of 697 over 100 years with the F-rate being 0.625. In contrast, 2,2,2-trifluoroethyl trifluoromethyl ether has a Boiling point of + 11 ° C and a GWP of 487 over 100 years, where the F-rate is 0.75. Both have an ODP of 0 and are therefore ecologically completely harmless.

In addition, it has been found that pentafluoroethyl methyl ether is thermally stable at a temperature of 175 ° C for 30 days and thus fully compatible with the operating conditions of the electrical device. Since higher molecular weight hydrofluoromonether studies on thermal stability have shown that ethers with fully hydrogenated methyl or ethyl groups have lower thermal stability than those with partially hydrogenated groups, it can be assumed that the thermal stability is 2.2.2 Trifluoroethyltrifluoromethylether is even higher.

Hydrofluoromonoethers in general, and pentafluoroethyl methyl ether and 2,2,2-trifluoroethyl trifluoromethyl ether in particular, show a very low toxicity risk to humans. This can be concluded from the present results of HFC ("hydrofluorocarbon") tests on mammals. In addition, the information available on commercially available hydrofluoromonethers for the compounds of the present invention gives no indication of carcinogenicity, mutagenicity, reproductive / developmental impairment and other chronic effects.

Based on the data available for commercially available higher molecular weight hydrofluoroethers, it can be concluded that hydrofluoromonoethers, and in particular pentafluoroethyl methyl ether and 2,2,2-trifluoroethyl trifluoromethyl ether, have an LC ₅₀ value higher than 10,000 ppm, so that they are also suitable from a toxicological point of view are.

The hydrofluoromonoethers mentioned have a higher dielectric strength than air. In particular, pentafluoroethyl methyl ether at 1 bar has a dielectric strength which is approximately 2.4 times higher than that of air at 1 bar.

In view of their boiling point, which is preferably below 55 ° C., more preferably below 40 ° C., and in particular below 30 ° C., the hydrofluoromonoethers mentioned, in particular pentafluoroethyl methyl ether and 2,2,2-trifluoroethyl trifluoromethyl ether, are normally gaseous under operating conditions. Thus, a dielectric insulating fluid can be obtained in which each component is gaseous under operating conditions of the electrical device, which is preferable.

Alternatively or in addition to the above-mentioned hydrofluoromonoethers, the isolation medium may be a fluoroketone, in particular a fluoroketone having 4 to 12 carbon atoms.

The term "fluoroketone" as used in the context of this invention is to be construed broadly and includes in particular both perfluoroketones and hydrofluorocarbons, and further includes saturated compounds and unsaturated compounds, i. H. Compounds with double and / or triple bonds between carbon atoms. The at least partially fluorinated alkyl chains of the fluoroketones may be linear or branched or may form a ring optionally substituted with one or more alkyl groups. In exemplary embodiments, the fluoroketone is a perfluoroketone. In further exemplary embodiments, the fluoroketone comprises a branched alkyl chain, which may in particular be an at least partially fluorinated alkyl chain. In other exemplary embodiments, the fluoroketone is a fully saturated compound.

In another aspect, the present invention also relates to dielectric isolation fluids comprising a fluoroketone of 4 to 12 carbon atoms wherein the at least partially fluorinated alkyl chain of the fluoroketone forms a ring optionally substituted with one or more alkyl groups.

According to a particularly preferred embodiment, the fluoroketone has exactly five or exactly six carbon atoms or mixtures thereof.

Compared to longer chain fluoroketones with more than six carbon atoms, fluoroketones with exactly five or exactly six carbon atoms have the advantage of a relatively low boiling point. Thus, problems that may occur with liquefaction can be avoided even when the device is used at low temperature.

In particular, the fluoroketone is at least one compound selected from the group consisting of the compounds defined by the following structural formulas in which at least one hydrogen atom is substituted by a fluorine atom:

Fluoroketones having five or more carbon atoms are more preferred because they are non-toxic and have a very high safety tolerance for humans. This is in contrast to fluoroketones with less than four carbon atoms, such as hexafluoroacetone (or hexafluoropropanone), which are toxic and very reactive. Specifically, fluoroketones with exactly five carbon atoms are short here as fluoroketones a), and fluoroketones with exactly six carbon atoms up to 500 ° C thermally stable.

In particular embodiments, fluoroketones, especially fluoroketones a), are preferred with a branched alkyl chain because their boiling points are lower than the boiling points of the corresponding compounds (i.e., having the same molecular formula) with a linear alkyl chain.

According to particular embodiments, the fluoroketone a) is a perfluoroketone, specifically with the empirical formula C ₅ F ₁₀ O, ie completely saturated, ie without double or triple bonds between carbon atoms. More preferably, the fluoroketone is selected from the group consisting of 1,1,1,3,4,4,4-heptafluoro-3- (trifluoromethyl) butan-2-one (also referred to as decafluoro-2-methylbutan-3-one). , 1,1,1,3,3,4,4,5,5,5-decafluoropentan-2-one, 1,1,1,2,2,4,4,5,5,5-decafluoropentane-3 and octafluorocyclopentanone, and is most preferably 1,1,1,3,4,4,4-heptafluoro-3- (trifluoromethyl) butan-2-one.

1,1,1,3,4,4,4-Heptafluoro-3-(trifluoromethyl)butan-2-on, welches hier kurz als ”C5-Keton” bezeichnet wird und die Molekülformel CF₃C(O)CF(CF₃)₂ oder C₅F₁₀O aufweist, ist besonders bevorzugt hinsichtlich einer Verwendung in Hoch- und Mittelspannungsisolationsanwendungen, weil es die Vorteile einer hohen dielektrischen Festigkeit, insbesondere in Mischung mit einem dielektrischen Hintergrund- bzw. Trägergas, eines sehr tiefen GWP-Werts und eines tiefen Siedepunkts in sich vereint. Weiter weist es einen ODP(Ozone Depletion Potential)-Wert von 0 auf und ist praktisch ungiftig.1,1,1,3,4,4,4-Heptafluoro-3- (trifluoromethyl) butan-2-one can be represented by the following structural formula (I):

1,1,1,3,4,4,4-heptafluoro-3- (trifluoromethyl) butan-2-one, which is herein referred to as "C5-ketone" and the molecular formula CF ₃ C (O) CF (CF ₃ ) ₂ or C ₅ F ₁₀ O is particularly preferred for use in high and medium voltage insulation applications, because it has the advantages of high dielectric strength, particularly in admixture with a dielectric background gas of very low GWP and a low boiling point. Furthermore, it has an ODP (Ozone Depletion Potential) value of 0 and is practically non-toxic.

Even better insulation values can be achieved with a mixture of different fluoroketone components. According to a particularly preferred embodiment, it is particularly preferred that a fluoroketone having exactly 5 carbon atoms according to the above statements, which is here briefly referred to as fluoroketone a), and a fluoroketone having exactly 6 carbon atoms or exactly 7 carbon atoms, which is briefly referred to as fluoroketone c) is referred to simultaneously contained in the dielectric insulating fluid. Thus, an isolation fluid results in more than one fluoroketone, with each fluoroketone contributing to the dielectric strength of the isolation fluid.

sowie allen Fluorketonen mit genau 6 Kohlenstoffatomen, in welchen die wenigstens teilweise fluorierte Alkylkette des Fluorketons zumindest teilweise oder vollständig einen Ring bildet, welcher mit einer oder mehreren Alkylketten substituiert ist (IIh);
und/oder wenigstens eine Verbindung ausgewählt aus der Gruppe bestehend aus den durch die folgenden Strukturformeln definierten Verbindungen, in welchen wenigstens ein Wasserstoffatom durch ein Fluoratom substituiert ist:

sowie allen Fluorketonen mit genau 7 Kohlenstoffatomen, in welchen die wenigstens teilweise fluorierte Alkylkette des Fluorketons zumindest teilweise oder vollständig einen Ring bildet, welcher mit einer oder mehreren Alkylketten substituiert ist (IIIo).According to a particular embodiment, the further fluoroketone c) is at least one compound selected from the group consisting of the compounds defined by the following structural formulas in which at least one hydrogen atom is substituted by a fluorine atom:

and all fluorocarbons having exactly 6 carbon atoms in which the at least partially fluorinated alkyl chain of the fluoroketone at least partially or completely forms a ring substituted with one or more alkyl chains (IIh);
and / or at least one compound selected from the group consisting of the compounds defined by the following structural formulas in which at least one hydrogen atom is substituted by a fluorine atom:

and all fluoro ketones having exactly 7 carbon atoms, in which the at least partially fluorinated alkyl chain of the fluoroketone at least partially or completely forms a ring which is substituted by one or more alkyl chains (IIIo).

In another aspect, the present invention relates to a dielectric isolation fluid comprising a fluoroketone of exactly 6 carbon atoms in which the at least partially fluorinated alkyl chain of the fluoroketone forms a ring, which is preferably substituted with one or more alkyl groups. In addition, such a dielectric insulating fluid may comprise a background gas, which is in particular selected from the group consisting of: air, an air component, nitrogen, oxygen, carbon dioxide, nitric oxide (including but not limited to NO ₂ , NO, N ₂ O), and Mixtures of these substances. Furthermore, an electrical device comprising such a dielectric isolation fluid is disclosed.

In another aspect, the present invention relates to a dielectric isolation fluid comprising a fluorocarbon of exactly 7 carbon atoms in which the at least partially fluorinated alkyl chain of the fluoroketone forms a ring optionally substituted with one or more alkyl groups. In addition, such a dielectric insulating fluid may comprise a background gas, which is in particular selected from the group consisting of: air, an air component, nitrogen, oxygen, carbon dioxide, nitric oxide (including but not limited to NO ₂ , NO, N ₂ O), and Mixtures of these substances. Furthermore, an electrical device comprising such a dielectric isolation fluid is disclosed.

The present invention includes any dielectric isolation fluid comprising any compound or combination of compounds selected from the group consisting of: the compounds of structural formulas (Ia) to (Ii), (IIa) to (IIh), (IIIa ) to (IIIo), and mixtures thereof, wherein the dielectric insulating fluid additionally comprises a background gas or carrier gas selected, in particular, from the group consisting of: air, an air component, nitrogen, oxygen, carbon dioxide, nitric oxide (including, but not limited to NO ₂ , NO, N ₂ O), and mixtures of these substances. Furthermore, an electrical device comprising such a dielectric isolation fluid is disclosed.

Depending on the desired application of the electrical component of the electrical apparatus of the present invention, a fluorocarbon of exactly six carbon atoms (which falls under the above designation "fluoroketone c)" may be preferred for the isolation compartment compartment; such a fluoroketone is non-toxic and has a very high safety tolerance for humans.

According to a particular embodiment, fluoroketone c), such as fluoroketone a), is a perfluoroketone and / or has a branched alkyl chain, in particular an at least partially fluorinated alkyl chain, and / or is a fully saturated compound. In particular, the fluoroketone c) has the empirical formula C ₆ F ₁₂ O, ie represents a completely saturated compound, ie a compound without double or triple bonds between carbon atoms.

More preferred is the fluoroketone c) selected from the group consisting of 1,1,1,2,4,4,5,5,5-nonafluoro-2- (trifluoromethyl) pentan-3-one (also referred to as dodecafluoro-2-methylpentane -3-on), 1,1,1,3,3, 4,5,5,5-Nonafluoro-4- (trifluoromethyl) pentan-2-one (also referred to as dodecafluoro-4-methylpentan-2-one), 1,1,1,3,4,4,5,5 , 5-nonafluoro-3- (trifluoromethyl) pentan-2-one (also referred to as dodecafluoro-3-methylpentan-2-one), 1,1,1,4,4,4-hexafluoro-3,3-bis- (trifluoromethyl) butan-2-one (also referred to as dodecafluoro-3,3- (dimethyl) butan-2-one), dodecafluorohexan-2-one, dodecafluorohexan-3-one and decafluorocyclohexanone (with the empirical formula C ₆ F ₁₀ O ), and is in particular the mentioned 1,1,1,2,4,4,5,5,5-nonafluoro-2- (trifluoromethyl) pentan-3-one.

1,1,1,2,4,4,5,5,5-Nonafluoro-4-(trifluoromethyl)pentan-3-on (hier kurz als ”C6-Keton” bezeichnet mit der Molekülformel C₂F₅C(O)CF(CF₃)₂) ist insbesondere für Hochspannungsisolationsanwendungen besonders bevorzugt wegen seiner guten isolierenden Eigenschaften und seinem extrem tiefen GWP-Wert. Insbesondere ist die druckreduzierte Durchschlagsfeldstärke ungefähr 240 kV/(cm·bar) und liegt damit viel höher als diejenige von Luft, die nur eine dielektrische Festigkeit von E_cr = 25 kV/(cm·bar) aufweist. Es weist ein Ozonabbaupotenzial von 0 auf und ist nicht-toxisch. Somit sind die Einflüsse auf die Umwelt wesentlich geringer, als wenn SF₆ verwendet wird, wobei sehr hohe Sicherheitstoleranzen für den Menschen erzielt werden.1,1,1,2,4,4,5,5,5-nonafluoro-2- (trifluoromethyl) pentan-3-one (also referred to as dodecafluoro-2-methylpentan-3-one) may be represented by the following structural formula ( II) are shown:

1,1,1,2,4,4,5,5,5-nonafluoro-4- (trifluoromethyl) -pentan-3-one (hereinafter referred to as "C6-ketone" with the molecular formula C ₂ F ₅ C (O ) CF (CF ₃ ) ₂ ) is particularly preferred for high voltage insulation applications because of its good insulating properties and its extremely low GWP value. In particular, the pressure-reduced breakdown field strength is approximately 240 kV / (cm · bar), much higher than that of air having only a dielectric strength of E _cr = 25 kV / (cm · bar). It has an ozone depletion potential of 0 and is non-toxic. Thus, the environmental impact is much lower than when SF ₆ is used, with very high safety tolerances for humans.

As mentioned above, the organofluoro compound may also be a fluoroolefin, in particular a hydrofluoroolefin. Preferably, the fluoroolefin or hydrofluoroolefin contains exactly three carbon atoms.

According to embodiments, the hydrofluoroolefin is selected from the group consisting of: 1,1,1,2-tetrafluoropropene (HFO-1234yf), 1,2,3,3-tetrafluoro-2-propene (HFO-1234yc), 1,1, 3,3-tetrafluoro-2-propene (HFO-1234zc), 1,1,1,3-tetrafluoro-2-propene (HFO-1234ze), 1,1,2,3-tetrafluoro-2-propene (HFO-) 1234ye), 1,1,1,2,3-pentafluoropropene (HFO-1225ye), 1,1,2,3,3-pentafluoropropene (HFO-1225yc), 1,1,1,3,3-pentafluoropropene (HFO -1225zc), (Z) 1,1,1,3-tetrafluoropropene (HFO-1234zeZ), (Z) 1,1,2,3-tetrafluoro-2-propene (HFO-1234yeZ), (E) 1,1 , 1,3-tetrafluoropropene (HFO-1234zeE), (E) 1,1,2,3-tetrafluoro-2-propene (HFO-1234yeE), (Z) 1,1,1,2,3-pentafluoropropene (HFO -1225yeZ), (E) 1,1,1,2,3-pentafluoropropene (HFO-1225yeE), and combinations thereof.

According to further preferred embodiments, one or more isolation space compartments contains a dielectric isolation fluid containing SF ₆ . SF ₆ is known for its outstanding insulation and arc quenching properties. In addition, SF _{6 is} very well compatible with materials or material components used in known electrical devices, and in particular in switchgear. Thus, SF _{6 is} preferably used in one or more isolation compartment compartments where very high dielectric and / or arc-extinguishing capability is required, and in which materials may be present which may have incompatibilities with (to SF ₆ ) alternative gases. This could be the case in voltage transformers, for example, as detailed below.

In further embodiments, one or more isolation space compartments are / are free of SF ₆ . In this way, potential greenhouse effects that could result from the use of SF _{6 can} be minimized.

The use of an insulating fluid which is free of SF ₆ is particularly preferred for isolation compartment compartments for which the use of an environmentally friendly organofluorine compound having a low toxicity, such as a fluoroketone, especially C5K, is a comparable or even improved alternative to conventional isolation or quenching -Media, such as SF ₆ represent.

In this regard, it is further preferred that the isolation compartment compartments comprising an isolation fluid containing an organofluorine compound are substantially free of SF ₆ .

As mentioned, the second insulating fluid can differ from the first insulating fluid in its composition and / or a gas density and / or its gas pressure, in particular in its filling composition and / or its filling gas density and / or its filling gas pressure.

The present invention is further illustrated by the attached figure; showing:

1 a schematic representation of a gas-insulated high voltage switchgear ("high voltage gas-insulated switchgear", HV GIS) according to the present invention.

In the 1 shown HV GIS includes a circuit breaker 10 which two contacts 12a . 12b one of which is movable with respect to the other. One of the contacts 12a leads to a pair of busbars 14 . 14 ' , being a first separator 16a respectively. 16a ' between the circuit breaker 10 and the corresponding busbars 14 . 14 ' is arranged.

The other contact 12b leads to an implementation 18 extending from the outside of a building through a wall 20 extends through the building into the interior. Between the circuit breaker 10 and the implementation 18 is a second (outgoing or feed side) divider 16b with a fast-acting switch 22 arranged, with a voltage transformer 24 and a current transformer 26 next to the second separator 16b are arranged.

The circuit breaker 10 is in a circuit breaker housing 100 the interior of which is a circuit breaker insulation space compartment 102 Are defined. The circuit breaker isolation compartment compartment 102 comprises a circuit breaker _{insulation fluid} f _cb which, according to a specific embodiment, contains an organofluorine compound and carbon dioxide (CO ₂ ). Of course, embodiments are also conceivable in which the circuit breaker _{insulation fluid} f _cb mainly comprises SF ₆ or consists essentially of SF ₆ .

The first separator 16a . 16a ' and a portion of the bus bar are in a first disconnector housing 160 arranged, with a second separator 16b in a second disconnector housing 161 is arranged. The interior of both the first and second isolator housings 160 . 161 each defines a separator isolation compartment compartment 162 respectively. 163 , Both the first isolator isolation compartment 162 as well as the second separator isolation compartment compartment 163 comprise a separator isolation fluid f _d , which according to a specific embodiment contains an organofluorine compound and air or nitrogen (N ₂ ), preferably nitrogen (N ₂ ) in admixture with oxygen (O ₂ ).

The voltage converter 24 is in a meter component housing in the form of a voltage converter housing 240 the interior of which is a meter component isolation space compartment in the form of a voltage transformer isolation compartment compartment 242 Are defined. The voltage transformer isolation compartment compartment 242 comprises a meter component _{isolation fluid} f _me in the form of a voltage transformer _{isolation fluid} f _vt , which according to a specific embodiment contains or consists of sulfur hexafluoride (SF ₆ ).

The implementation 18 is in a bushing housing 180 whose interior is a feed-through isolation compartment compartment 182 Are defined. The bushing isolation compartment compartment 182 comprises a feedthrough insulating fluid f _b , which according to a specific embodiment sulfur hexafluoride (SF ₆ ) and nitrogen (N ₂ ) contains, in particular N ₂ in an amount of 20 wt .-% to 50 wt .-% based on the total weight of the insulating fluid f _b ,

According to a preferred embodiment, the electrical device is 1 a high-voltage device, a medium-voltage device, a low-voltage device, a DC device, a switchgear, an air-insulated switchgear, a part or a component of an air-insulated switchgear, a gas-insulated metal-enclosed switchgear (GIS), a part or a component 4 ; 10 . 12a . 12b ; 14 . 14 '; 16a . 16a ' . 16b ; 184 ; 194 ; 22 ; 24 a gas-insulated metal-enclosed switchgear, an air-insulated pipeline, a gas-insulated pipeline (GIL), a busbar 14 . 14 ' , an implementation 18 , an air-insulated insulator, a gas-insulated metal-enclosed insulator, a cable, a gas-insulated cable, a cable connection, a current transformer 26 , a voltage transformer 24 , Sensors, a surge arrester, a capacitor, an inductive resistor, an electrical resistor, a current limiter, a high voltage switch 10 , a grounding switch 22 , a separator 16a . 16a ' . 16b , a circuit breaker, a circuit breaker 10 , a gas circuit breaker 10 , a vacuum circuit breaker, a generator circuit breaker, a medium voltage switch, a ring main unit, a recloser, a sectionalizer, a low voltage switch, a transformer, a distribution transformer, a power transformer, a tap changer, a transformer feedthrough, an electric rotating machine, a generator, a motor, a drive, a semiconducting device, a power semiconductor device, a power converter, a computing machine, a component, and / or a combination of such devices.

According to a particularly preferred embodiment, the device comprises a separator 16a . 16a ' . 16b which is in a disconnector housing 160 . 161 the interior being a separator isolation compartment compartment 162 . 163 which contains a separator isolation fluid f _d containing an organofluoro compound and air or nitrogen (N ₂ ), preferably nitrogen (N ₂ ) in a mixture with oxygen (O ₂ ).

In yet another embodiment, the electrical device comprises 1 a busbar 14 . 14 ' , which in a busbar housing 140 the interior of which is a bus bar insulation compartment compartment 142 defining a bus bar insulating fluid f _bb containing an organofluorine compound and air or nitrogen (N ₂ ), preferably nitrogen (N ₂ ) in a mixture with oxygen (O ₂ ).

In any of these embodiments, the organofluoro compound contained in the separator isolation fluid is a fluoroketone. It is further preferable that the fluoroketone is contained in an amount of from 3% by volume to 60% by volume, more preferably from 10% by volume to 40% by volume, still more preferably from 20% by volume to 30% by volume. -%, and most preferably of about 20 vol .-% based on the total weight of the insulating fluid f _d is present. It has been found that the organofluorine compound, especially the fluoroketone, especially C5K, in admixture with air or nitrogen exhibits a particularly high insulating ability, making the mixture particularly well suited for use in a separator isolation compartment compartment 162 ; 163 or in a busbar insulation compartment compartment 142 , In this regard, moreover, on the WO-A-2012/080246 Reference, the disclosure of which is hereby incorporated by reference in its entirety.

Of course, in addition to the separator 16a . 16a '; 16b additional components in the isolator housing 160 ; 161 be arranged, such as a portion of a busbar.

According to a further particularly preferred embodiment, the electrical device comprises 1 a circuit breaker 10 which is in a circuit breaker housing 100 the interior of which is a circuit breaker isolation compartment compartment 102 defining a circuit breaker _{isolating fluid} f _cb containing an organofluorine compound and carbon dioxide (CO ₂ ), preferably carbon dioxide (CO ₂ ) in admixture with oxygen (O ₂ ). Also in this embodiment, the organofluorocompound contained in the circuit breaker insulating fluid f _cb is preferably a fluoroketone, and it is further preferable that the fluoroketone is contained in an amount of 1% by volume to 60% by volume, more preferably 2% by volume. % to 40% by volume, more preferably from 3% to 30% by volume and most preferably about 5% by volume, based on the total weight of the insulating _{fluid fcb} . It has been found that the organofluorine compound, especially the fluoroketone, especially C5K in admixture with CO ₂ exhibits a particularly high arc quenching capability, making the blend very well suited for use in a circuit breaker 10 suitable is.

A mixture of carbon dioxide (CO ₂ ) and oxygen (O ₂ ) is particularly preferred. In this regard, it is preferred that the ratio of the molar fraction of CO ₂ to the molar fraction of O _{2 be} in the range of 98: 2 to 80:20, since the presence of O ₂ in the appropriate amounts permits soot formation to be prevented becomes.

More preferably, the ratio of the molar fraction of CO ₂ to the molar fraction of O _{2 is} in the range of 95: 5 to 85:15, more preferably 92: 8 to 88:12, and most preferably about 90:10. In this regard, it has been found, on the one hand, that O ₂ , which is present in a molar fraction of at least 5%, allows prevention of soot formation even after repeated power interruption events with high arcing. On the other hand, if O _{2 is present} at a molar fraction of at most 15%, the risk of degradation of the circuit breaker material due to oxidation is reduced.

Also, particularly with respect to embodiments in which the isolation fluid contains an organofluorine compound, the use of O _{2 will} allow reactive and potentially toxic byproducts to be oxidized. Depending on the type and amount of by-products formed, a molar fraction of up to 15% O ₂ can be used.

Alternatively, isolation compartment compartments in which organofluorine compounds typically do not degrade are preferably at least substantially free of oxygen to enable the electrical device can be operated at higher temperatures and still in accordance with known standards, such as IEC 62271-1 , is.

According to a further embodiment, the electrical device comprises 1 a meter component, in particular a voltage converter 24 wherein said meter component is in a meter component housing 240 the interior of which is a meter component isolation space compartment 242 defining a meter component _isolation fluid comprising or consisting of sulfur hexafluoride (SF ₆ ). As mentioned, SF ₆ not only has very good insulation capabilities but also very high compatibility with material components such as those found in a meter such as a voltage converter 24 , which can effectively prevent problems of material incompatibility.

According to a further embodiment, the electrical device comprises 1 an implementation 18 , which in a bushing housing 180 the interior of which is a feedthrough isolation space compartment 182 defining a feedthrough insulating _fluid f _b comprising sulfur hexafluoride (SF ₆ ) and nitrogen (N ₂ ), in particular N ₂ in an amount of from 20% to 50% by weight based on the total weight of feedthrough insulating _fluid f _b . By using the above-specified feedthrough insulating fluid f _b , problems of possible condensation of the feedthrough insulating _fluid f _b , particularly the feedthrough insulating _gas f _b , can be effectively prevented despite the relatively low minimum ambient temperature of the feedthrough 18 ,

The same is true for a Ausgangssstromschienenkanal or an outdoor part 19 to, which in an output busbar housing or in a (typically building exterior side) outer housing 190 the interior of which is an output bus bar or outdoor compartment isolation compartment 190 defining an output bus bar or outdoor isolating fluid f _eb for isolating the active component 194 the output busbar channel or the outer part 19 the GIS or GIL or the electrical device 1 contains. The output _{busbar channel insulating fluid} f _eb also contains sulfur hexafluoride (SF ₆ ) and nitrogen (N ₂ ), in particular N ₂ in an amount of 20% to 50% by weight, based on the total weight of the insulating _fluid f _eb .

Depending on the situation, other isolation compartment compartments may contain an isolation fluid that is substantially free of oxygen to prevent corrosion. Alternatively or additionally, an insulating fluid may be used which mainly comprises oxygen, i. H. with a content of more than 50%, or which consists essentially of oxygen, if a moderate dielectric strength is sufficient.

As also mentioned, according to the present invention, a first and a second insulating fluid are used, which are different from each other. Of course, further isolation fluids, ie, a third, a fourth, a fifth isolation fluid, etc., may be used, depending on the number of isolation compartment compartments for which different requirements must be met. According to specific embodiments, a third isolation compartment compartment 182 ; 192 ; 242 ; 102 ; 142 ; 162 ; 163 which has a third insulating fluid which is different in its composition and / or its gas density and / or its gas pressure, in particular its filling composition and / or its filling gas density and / or its filling gas pressure, compared to both the first insulating fluid and the second insulating fluid ,

In further embodiments, at least under operating conditions of the electrical device 1 in that the at least one first insulating fluid is gaseous and the at least one second insulating fluid is a two-phase system comprising a gaseous portion and a liquid portion.

According to specific embodiments, the pressure of the first isolation fluid in the first isolation compartment compartment is thus different from the pressure of the second isolation fluid in the second isolation compartment compartment.

With regard to a difference in the gas density, the ratio of the pressure in the first isolation chamber compartment to the pressure in the second isolation compartment can be more than about 1.1, in particular more than about 1.3, in the specific case more than about 1.5, and in the more specific case more than about 1.7. Specifically, a pressure of about 12 bar in the first Isolationraumkompartiment be present, while the pressure in the second Isolationraumkompartiment is about 7 bar.

• – ein Sammelschienenisolationsraumkompartiment 142, ein erstes Trennerisolationsraumkompartiment 162, ein zweites Trennerisolationsraumkompartiment 163, ein Gehäuseisolationsraumkompartiment 182, ein Aussenteilisolationsraumkompartiment 192 und ein Spannungswandlerisolationsraumkompartiment 242 gegenüber einem Leistungsschalterisolationsraumkompartiment 102; oder
• – ein Leistungsschalterisolationsraumkompartiment 102 gegenüber einem Sammelschienenisolationsraumkompartiment 142, einem ersten Trennerisolationsraumkompartiment 162, einem zweiten Trennerisolationsraumkompartiment 163, einem Durchführungsisolationsraumkompartiment 182, einem Aussenteilisolationsraumkompartiment 192 und einem Spannungswandlerisolationsraumkompartiment 242; oder
• – ein Durchführungsisolationsraumkompartiment 182 und ein Aussenteilisolationsraumkompartiment 192 gegenüber einem Sammelschienenisolationsraumkompartiment 142, einem ersten Trennerisolationsraumkompartiment 162, einem zweiten Trennerisolationsraumkompartiment 163 und einem Spannungswandlerisolationsraumkompartiment 242; oder
• – ein erstes Trennerisolationsraumkompartiment 162 und ein zweites Trennerisolationsraumkompartiment 163 gegenüber einem Leistungstrennerisolationsraumkompartiment 102, einem Sammelschienenisolationsraumkompartiment 142 und einem Spannungswandlerisolationsraumkompartiment 242.

Embodiments of first isolation space compartments having higher pressures (eg, in the above-mentioned pressure ratios) than second isolation space compartments having lower pressures may be, by way of example only and in addition to other possibilities, the following:

• - a busbar isolation compartment compartment 142 , a first isolator insulation compartment 162 , a second isolator isolation compartment compartment 163 , a housing isolation compartment compartment 182 , an outdoor compartment isolation compartment 192 and a voltage transformer isolation compartment compartment 242 opposite a circuit breaker isolation compartment compartment 102 ; or
• A circuit breaker isolation compartment compartment 102 opposite a busbar isolation compartment compartment 142 , a first isolator isolation compartment compartment 162 , a second isolator isolation compartment compartment 163 , a bushing isolation compartment compartment 182 , an outdoor compartment isolation compartment 192 and a voltage transformer isolation compartment compartment 242 ; or
• - a bushing isolation compartment compartment 182 and an outdoor compartment isolation compartment compartment 192 opposite a busbar isolation compartment compartment 142 , a first isolator isolation compartment compartment 162 , a second isolator isolation compartment compartment 163 and a voltage transformer isolation compartment compartment 242 ; or
• A first isolator isolation compartment compartment 162 and a second isolator isolation compartment compartment 163 opposite a power isolator isolation compartment compartment 102 , a busbar isolation compartment compartment 142 and a voltage transformer isolation compartment compartment 242 ,

LIST OF REFERENCE NUMBERS

1

electrical device

2

Housing of the electrical device

3

Interior of electrical device, dielectric isolation room

4

electrical component

10

breakers

100

Circuit breaker housing

102

Leistungsschalterisolationsraumkompartiment; Breaker volume, breaker chamber

12a

first contact (inside the breaker chamber)

12b

second contact (inside the breaker chamber)

14, 14 '

busbars

140

Busbar housing

142

Busbar isolation compartment compartments (typically in-building)

16a, 16a '

first disconnector, busbar disconnector

16b

second separator, supply-side separator, outgoing separator

160

first isolator housing

161

second disconnector housing

162

first isolator insulation compartment

163

second isolator isolation compartment compartment

18

execution

180

Through housing

182

Durchführungsisolationsraumkompartiment

184

Implementing conductor

19

(outgoing or supply side) outside part of GIS or GIL, outdoor building part, output busbar trunking

190

(building exterior) housing of the GIS or GIL outer section, output busbar trunking

192

Aussenteilisolationsraumkompartiment

194

active component of the outer part of GIS or GIL

20

building wall

22

High-speed grounding switch

24

DC converter

240

Voltage converter housing

242

Spannungswandlerisolationsraumkompartiment

26

Power converter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2010/142346 A [0005, 0006]
• WO 2012/080246 A [0005, 0006, 0083]
• US 7128133 B [0027]

Cited non-patent literature

• IEC 62271-1 [0014]
• IEC 62271-1 [0089]

Claims (28)

Electric device ( 1 ) for the generation, distribution, transmission and / or use of electrical energy, the electrical device ( 1 ) a housing ( 2 ; 100 . 140 . 160 . 161 . 180 . 190 . 210 ), which has an interior ( 3 ; 102 . 142 . 162 . 163 . 182 . 192 . 242 ), wherein at least a part of the interior ( 3 ; 102 . 142 . 162 . 163 . 182 . 192 . 242 ) of the electrical device at least two isolation space compartments ( 102 . 142 . 162 . 163 . 182 . 192 . 242 ), which are separated from each other and arranged in succession, and in each of the isolation space compartments ( 102 . 142 . 162 . 163 . 182 . 192 . 242 ) an electrical component ( 4 ; 10 . 12a . 12b ; 14 . 14 '; 16a . 16a ' . 16b ; 184 ; 194 ; 22 ; 24 ), which is surrounded by an insulating fluid, wherein at least a first isolation space compartment ( 102 ; 142 ; 162 ; 163 ; 182 ; 192 ; 242 ) comprises a first isolation fluid and at least one second isolation compartment compartment ( 142 ; 162 ; 163 ; 182 ; 192 ; 242 ; 102 ) comprises a second isolation fluid, wherein at least one of the first and second isolation fluids comprises an organofluorine compound comprising at least two carbon atoms, and the second isolation fluid is different from the first isolation fluid. Electric device ( 1 ) according to claim 1, wherein the isolation compartment compartments ( 102 . 142 . 162 . 163 . 182 . 192 . 242 ) are separated from each other gas-tight. Electric device ( 1 ) according to one of the preceding claims, wherein the first insulating fluid and the second insulating fluid are at least partially gaseous. Electric device ( 1 ) according to one of the preceding claims, wherein the first insulating fluid and the second insulating fluid are mixtures of compounds. Electric device ( 1 ) according to one of the preceding claims, wherein the first insulating fluid and the second insulating fluid differ in their composition and / or their density from each other, and in particular differ in their filling composition and / or their filling density and / or their filling pressure. Electric device ( 1 ) according to one of the preceding claims, wherein the organofluoro compound is selected from the group consisting of: fluoro ethers, in particular hydrofluoromonoethers, fluoramines, fluoroketones, fluoroolefins, in particular hydrofluoroolefins, and mixtures and / or degradation products thereof. Electric device ( 1 ) according to any one of the preceding claims, wherein the insulating fluid comprises a hydrofluoromonether containing at least three carbon atoms. Electric device ( 1 ) according to one of the preceding claims, wherein the insulating fluid comprises a fluoroketone containing from four to twelve carbon atoms, preferably containing exactly five carbon atoms and / or exactly six carbon atoms and / or exactly seven carbon atoms and / or exactly eight carbon atoms or a mixture thereof. Electric device ( 1 ) according to one of the preceding claims, wherein at least one Isolationsraumkompartiment contains a background gas, in particular selected from the group consisting of: air, an air component, nitrogen, oxygen, carbon dioxide, a nitrogen oxide and mixtures thereof. Electric device ( 1 ) according to claim 9, wherein the background gas is a mixture of CO ₂ and O ₂ , wherein the ratio of the molar fraction of CO ₂ to the molar fraction of O _{2 is} preferably in a range from 98: 2 to 80:20, more preferably in one Range from 95: 5 to 85:15, more preferably in a range of 92: 8 to 88:12, and most preferably about 90:10. Electric device ( 1 ) according to one of the preceding claims, wherein one or more of the isolation space compartments ( 102 . 142 . 162 . 163 . 182 . 192 . 242 ) contains an insulating fluid containing sulfur hexafluoride (SF ₆ ). Electric device ( 1 ) according to one of the preceding claims, wherein one or more of the isolation space compartments ( 102 . 142 . 162 . 163 . 182 . 192 . 242 ) is substantially free of sulfur hexafluoride (SF ₆ ). Electric device ( 1 ) according to one of the preceding claims, wherein the at least one isolation compartment compartment ( 102 . 142 . 162 . 163 . 182 . 192 . 242 ) containing an organofluoro compound-containing isolation fluid substantially free of sulfur hexafluoride (SF ₆ ). Electric device ( 1 ) according to one of the preceding claims, wherein the pressure, in particular the filling pressure, of the first insulating fluid in the first isolation compartment compartment ( 102 ; 142 ; 162 ; 163 ; 182 ; 192 ; 242 ) from the pressure, in particular the filling pressure, of the second insulating fluid in the second isolation compartment compartment ( 142 ; 162 ; 163 ; 182 ; 192 ; 242 ; 102 ) is different. Electric device ( 1 ) according to claim 14, wherein the ratio of the pressure, in particular the filling pressure, in the first isolation compartment compartment ( 142 . 162 . 163 . 182 . 192 . 242 ; or 102 ; or 182 . 192 ; or 162 respectively. 163 ) for the pressure, in particular the filling pressure, in the second isolation compartment compartment ( 102 ; or 142 . 162 . 163 . 182 . 192 . 242 ; or 142 . 162 . 163 . 242 ; or 102 . 142 respectively. 242 ) is greater than about 1.1, more preferably greater than about 1.3, even more preferably greater than about 1.5, and most preferably greater than about 1.7. Electric device ( 1 ) according to one of the preceding claims, wherein a third isolation compartment compartment ( 182 ; 192 ; 242 ; 102 ; 142 ; 162 ; 163 ), which comprises a third insulating fluid, which in comparison to both the first insulating fluid and to the second insulating fluid in its composition and / or its gas density and / or gas pressure, in particular the filling composition and / or the filling gas density and / or the filling gas pressure, different. Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) a high voltage or medium voltage device ( 1 ), or a high voltage or medium voltage component ( 4 ; 10 . 12a . 12b ; 14 . 14 '; 16a . 16a ' . 16b ; 184 ; 194 ; 22 ; 24 ). Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) a high-voltage device, a medium-voltage device, a low-voltage device, a DC device, a switchgear, an air-insulated switchgear, a part or a component of an air-insulated switchgear, a gas-insulated metal-enclosed switchgear (GIS), a part or a component ( 4 ; 10 . 12a . 12b ; 14 . 14 '; 16a . 16a ' . 16b ; 184 ; 194 ; 22 ; 24 ) a gas-insulated metal-enclosed switchgear, an air-insulated pipeline, a gas-insulated pipeline (GIL), a busbar ( 14 . 14 ' ), an implementation ( 18 ), an air-insulated insulator, a gas-insulated metal-enclosed insulator, a cable, a gas-insulated cable, a cable connection, a current transformer ( 26 ), a voltage converter ( 24 ), Sensors, a surge arrester, a capacitor, an inductive resistor, an electrical resistor, a current limiter, a high voltage switch ( 10 ), a grounding switch ( 22 ), a separator ( 16a . 16a ' . 16b ), a load switch, a circuit breaker ( 10 ), a gas circuit breaker ( 10 ), a vacuum circuit breaker, a generator circuit breaker, a medium voltage switch, a ring circuit unit, a recloser, a sectionalizer, a low voltage switch, a transformer, a distribution transformer, a power transformer, a tap changer, a transformer feedthrough, an electric rotating machine, a generator, a motor A drive, a semiconducting device, a power semiconductor device, a power converter, a computing machine, a component and / or a combination of such devices or a part thereof. Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) a separator ( 16a . 16a '; 16b ), which in a disconnector housing ( 160 ; 162 ) whose interior is a separator isolation space compartment ( 162 ; 163 ), which comprises a separator isolation fluid fd containing an organofluoro compound and air or nitrogen (N ₂ ), preferably nitrogen (N ₂ ) in admixture with oxygen (O ₂ ). Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) a busbar ( 14 . 14 ' ), which in a busbar housing ( 140 ), the interior of which is a bus bar insulation space compartment ( 142 ), which contains a bus bar insulating fluid f _bb containing an organofluoro compound and air or nitrogen (N ₂ ), preferably nitrogen (N ₂ ) in a mixture with oxygen (O ₂ ). Electric device ( 1 ) according to claim 19 or 20, wherein the Organofluorverbindung contained in the separator insulation fluid f _d or in the bus bar insulating fluid f _bb is a fluoroketone, preferably a fluoroketone in an amount of 3 vol .-% to 60 vol .-%, more preferably 10 vol % to 40% by volume, more preferably from 20% to 30% by volume, and most preferably about 20% by volume, based on the total weight of the separator insulation fluid f _d or bus bar insulation fluid f _bb . Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) a circuit breaker ( 10 ), which in a circuit breaker housing ( 100 ), the interior of which is a circuit breaker isolation compartment compartment ( 102 ), which contains a circuit breaker _{insulating fluid} f _cb containing an organofluorine compound and carbon dioxide (CO ₂ ), preferably carbon dioxide (CO ₂ ) in admixture with oxygen (O ₂ ). Electric device ( 1 ) according to claim 22, wherein the organofluoro compound contained in the circuit breaker insulating fluid f _cb is a fluoroketone, preferably a fluoroketone in an amount of 1% by volume to 60% by volume, more preferably 2% by volume to 40% by volume more preferably from 3% to 30% by volume, and most preferably about 5% by volume, based on the total weight of the circuit breaker _{insulation fluid} f _cb . Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) a meter component ( 24 ) contained in a meter component housing ( 240 ), the interior of which is a meter component isolation space compartment ( 242 ) containing a meter component isolating _fluid containing or consisting of sulfur hexafluoride (SF ₆ ). Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) an implementation ( 18 ), which in a bushing housing ( 180 ), the interior of which is a feedthrough isolation space compartment ( 182 ) containing a feedthrough insulating _fluid f _b containing sulfur hexafluoride (SF ₆ ) and nitrogen (N ₂ ), more preferably N ₂ in an amount of from 20% to 50% by weight based on the total weight of feedthrough insulating _fluid f _b . Electric device ( 1 ) according to one of the preceding claims, wherein the electrical device ( 1 ) an output busbar channel or an external part ( 19 ) located in an output busbar housing or in an outer housing ( 190 the interior of which is an output bus bar or outdoor compartment isolation compartment compartment ( 192 ) containing an outlet busbar or exterior insulating _fluid f _eb containing sulfur hexafluoride (SF ₆ ) and nitrogen (N ₂ ), more preferably N ₂ in an amount of from 20% to 50% by weight based on the total weight of the Outdoor isolation _fluid f _eb . Electric device ( 1 ) according to one of the preceding claims, wherein under operating conditions of the electrical device ( 1 ) the at least one first insulating fluid is gaseous and the at least one second insulating fluid is in a two-phase system comprising a gaseous portion and a liquid portion. Electric device ( 1 ) according to one of the preceding claims, wherein at least one of the first insulating fluid and the second insulating fluid has no oxygen (O ₂ ); and / or at least one further of the first isolation fluid and the second isolation fluid has greater than 50% oxygen (O ₂ ).

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