Abstract:
The present invention relates to a dielectric insulation medium comprising: a) sulphur hexafluoride (SF6) and/or tetrafluoro methane (CF4), in a mixture with b) at least one further component being an at least partially fluorinated fluoroketone.
Abstract:
The present invention relates to an apparatus for the generation, transmission, distribution and/or usage of electrical energy, said apparatus comprising a housing enclosing an insulating space (4) and an electrically conductive part arranged in the insulating space (4), said insulating space (4) containing a dielectric insulation fluid (3, 31) comprising an organofluorine compound, at least one solid component (2) of the apparatus being directly exposed to the insulation fluid (3, 31). According to the invention, at least one solid component (2) that is directly exposed to the insulation fluid (3, 31) contains a basic body (5) made of a first material and a protective layer (10) made of a second material different from the first material, said protective layer (10) being directly or indirectly applied on the basic body (5) and having a thickness of at least 50 μm.
Abstract:
The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising a compartment (14a), in which an arc-extinction medium (18; 18a, 18b) for improving circuit breaker operation is contained, and having an ejection orifice (17) through which the arc-extinction medium (18; 18a, 18b) is to be ejected, wherein the ejection orifice (17) opens out into an injection zone (5, 6, 71) of the circuit breaker (1) in which the pressure is lower than in an arcing zone (32) when an arc is present, and wherein the arc-extinction medium (18; 18a, 18b) and/or exhaust-cooling medium (18; 18a, 18b) is at least partially present in liquid form, when it is contained in the ejection device (8, 9; 80, 90).
Abstract:
Die mit einem Löschgas gefüllte Löschkammer für einen Hochleistungsschalter weist ein erstes Kontaktstück (1) und ein zweites Kontaktstück (2) auf, von welchen mindestens eines beweglich ist. Bei einem Ausschaltvorgang ist in einer Löschzone (3) ein zu löschender Lichtbogen (4) zwischen den beiden Kontaktstücken (1,2) ausbildbar. Es ist ein Heizvolumen (5) zur Aufnahme von durch den Lichtbogen (4) erhitztem Löschgas vorhanden, mittels welchem der Lichtbogen (4) beblasbar ist, und es ist ein erstes Kompressionsvolumen (7) vorhanden, welches derart angeordnet ist, dass es bei einem Ausschaltvorgang verkleinert wird, so dass Löschgas aus dem ersten Kompressionsvolumen (7) in die Löschzone (3) geleitet wird. Zusätzlich ist ein zweites Kompressionsvolumen (8) und ein von dem ersten (7) und dem zweiten (8) Kompressionsvolumen getrennt angeordnetes Expansionsvolumen (10) vorhanden. Das Expansionsvolumen (10) ist derart angeordnet, dass sich bei einer Vergrösserung des Gesamtvolumens von erstem (7) und dem zweitem (8) Kompressionsvolumen sein Volumen verkleinert und bei einer Verkleinerung des Gesamtvolumens von erstem (7) und dem zweitem (8) Kompressionsvolumen sein Volumen vergrössert. Das erste (7) und das zweite (8) Kompressionsvolumen sind über einen parallel zu einer Achse (A) der Löschkammer länglich erstreckten Zuströmkanal (9) miteinander verbunden. Das Expansionsvolumen (10) ist mit einem Abströmkanal (13) und/oder einem Reservoirvolumen (17) verbunden. Es wird eine verbesserte Lichtbogenbeblasung, insbesondere mit sauberem Löschgas, erreicht.
Abstract:
The present invention relates to an electrical apparatus having an insulating space (4) which contains a dielectric insulation fluid (3, 31) comprising an organofluorine compound. At least one solid component (2) of the apparatus that is directly exposed to the insulation fluid (3, 31) contains a basic body (5) made of a first material and a protective layer (10) made of a second material different from the first material, said protective layer (10) being directly or indirectly applied on the basic body (5) and having a thickness of at least 50 µm. The organofluorine compound is selected from the group consisting of: fluoroethers, fluoroketones, fluoroolefins, fluoronitriles, and mixtures thereof, and the first material comprises or consists of a material selected from the group consisting of: a polymeric material, a ceramic, a composite material, and mixtures or combinations thereof.
Abstract:
The present invention relates to vacuum circuit breakers (2) comprising a tank (4) enclosing a tank interior space (6) and therein a vacuum interrupter (8) with vacuum flask (10), which encloses a vacuum space (16) with a pair of moveable electrical contacts (18a, 18b). The contacts (18a, 18b) are each supported by a conductive stem (20a, 20b) extending from the vacuum space (16) to the outside of the vacuum space (16). The portion of the tank interior space (6) surrounding the vacuum interrupter (8) forms at least one insulation space (9, 9'), which contains a dielectric insulation medium comprising an organofluorine compound (11) with GWP lower than SF6. According to the invention, the organofluorine compound (11) is at least partially in liquid state at operating conditions of the circuit breaker, and at least a portion of the vacuum interrupter (8) is immersed in the liquid organofluorine compound (11).
Abstract:
The electrical switching device (1) comprises an arcing contact arrangement with a first arcing contact (4a) attached to an exhaust tube (6) and a mating second arcing contact (4b). At least a first exhaust volume (7) at least partially surrounding the exhaust tube (6) is further provided. Alternatively or additionally at least a second exhaust volume (8) following the second arcing contact (4b) is provided. The electrical switching device (1) further comprises an exterior volume (9) at least partially surrounding the exhaust tube (6), the first exhaust volume (7) and the second exhaust volume (8). The exhaust tube (6), the first exhaust volume (7), the second exhaust volume (8) and the exterior volume (9) form a travel path for a fluid travelling through them. A plurality of projections (13, 16) extending transversally to the longitudinal axis (z) for cooling down the fluid is provided in the travel path of the fluid.
Abstract:
A method and device for operating a fluid- insulated electrical apparatus (1) are disclosed. The insulation fluid (10) of the electrical apparatus (1) comprises at least two fluid components (A, B) which are a priori ingredients of the insulation fluid (10). The method comprises the step of carrying out at least one optical measurement and/or at least one gas chromatographic measurement on the insulation fluid (10). Using this measurement or these measurements or at least one additional measurement on the insulation fluid (10), a first concentration (c A ) of the first fluid component (A) and a second concentration (c B ) of the second fluid component (B) are derived. Then, using the first concentration (c A ) and the second concentration (c B ), and, advantageously, a dielectric breakdown strength of the insulation fluid (10), an operating state (O) of the electrical apparatus (1) is derived.
Abstract:
The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising an arc-extinction medium (18; 18a, 18b) for improved extinction of an arc formed during a breaker operation and an exhaust-cooling medium (18; 18a, 18b) for improved cooling of exhaust gases in the circuit breaker (1). Thereby, the arc-extinction liquid (18; 18a, 18b) comprises an organofluorine compound having a boiling point T b at 1 bar higher than -60°C and being selected from the group consisting of: a fluoroether; a fluoroamine; a fluoroketone; and mixtures thereof.
Abstract:
An electrical apparatus (10) for electrical energy handling comprises a housing (12) with at least one insulation space (16), in which an electrical component (14) is arranged and which contains an insulation medium (22) surrounding the electrical component (14). The insulation medium (22) comprises an organofluorine compound and at least one further gaseous component. Apparatus (10) further comprises a gas flow generating device (24) for flowing an initial gas mixture, containing the organofluorine compound and at least one further component of the insulation medium, out of the insulation space (16) through an outlet opening (26) arranged in the housing (12). A substance recovery device (30) downstream of outlet opening (26) comprises a separator (34) for separating the organofluorine compound from the at least one further component of the initial gas mixture, the separator (34) being a liquefaction device (36) for liquefying and/or solidification device for solidifying the organofluorine compound.