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:
Der gasisolierte Hochspannungs-Leistungsschalter (1) enthält ein Kompressions- (4) und ein Niederdruckvolumen (5) sowie ein die beiden Volumina (4,5) miteinander verbindendes Ventil (6), durch welches beim Schliessen des Schalters Isoliergas aus dem Niederdruckvolumen (5) ins Kompressionsvolumen (4) und beim Öffnen des Schalters oberhalb eines Schwellwerts des Gasdrucks Gas aus dem Kompressionsvolumen (4) im umgekehrter Richtung ins Niederdruckvolumen (5) strömt. Eine vereinfachte Ausführung des Schalters unter Einsparung von Bauteilen wird dadurch erreicht, dass in eine Ventilplatte (9) des Ventils (6) mindestens ein Loch (71) und mindestens eine einseitig gehaltene, in Abhängigkeit vom Druck des Isoliergases im Kompressionsvolumen (4) elastisch verbiegbare Blattfeder (7) eingeformt sind. Die Biegefeder (7) verschliesst beim Schliessen des Schalters das Loch (71) und gibt es beim Öffnen des Schalters frei, sobald der Druck des verdichteten Isoliergases im Kompressionsvolumen (4) den Wert des Gasdrucks im Niederdruckraum (5) um mindestens zwei bar übertrifft.
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 a dielectric insulation medium comprising a) a fluoroketone a) containing 5 carbon atoms, in a mixture with b) a dielectric insulation gas component b) different from the fluoroketone a), in particular air or an air component, the dielectric insulation medium, in particular the dielectric insulation gas, having a non-linearly increased dielectric strength that is larger than a sum of dielectric strengths of the gas components of the dielectric insulation medium.
Abstract:
Der Schalter dient dem Unterbrechen grosser Ströme und enthält ein isoliergasgefülltes Gehäuse (10), eine im Gehäuse (10) angeordnete Kontaktanordnung, die zwei längs einer Achse (A) relativ zueinander bewegbare Schaltstücke (20, 30) mit jeweils einem Nennstrom- (22, 32) und einem Lichtbogenkontakt (21, 31) aufweist, sowie einen Antrieb (D), der auf ein erstes (10) beider Schaltstücke wirkt. Der Schalter enthält ferner eine Vorrichtung (M), die dem Detektieren und Anzeigen des durch Lichtbogeneinwirkung hervorgerufenen Kontaktabbrands der beiden Lichtbogenkontakte (21, 31) dient und eine ausserhalb des Gehäuses (10) angeordnete Anzeige (70) aufweist. Bei diesem Schalter soll die durch Kontaktabbrand der Lichtbogenkontakte (21, 31) bestimmte Restlebensdauer mit einfachen mechanischen Mitteln detektiert und angezeigt werden. Dies wird dadurch erreicht, dass die beiden Lichtbogenkontakte (21, 31) bei geschlossener Kontaktanordnung unter Bildung einer Stossstelle (S) mit jeweils einem freien Ende Kopf an Kopf aneinanderstossen, dass der Lichtbogenkontakt (31) des zweiten Schaltstücks (30) entgegen der Wirkung einer vorgespannten Feder (33) axial verschiebbar gelagert ist und an seinem von der Stossstelle (S) abgewandten Ende ein axial ausgerichtetes Betätigungsorgan (50) trägt, und dass die Detektions- und Anzeigevorrichtung (M) ein gasdicht durch das Gehäuse (10) geführtes Getriebe (60) mit einem mit dem Betätigungsorgan (50) gekoppelten Antriebsglied (63) aufweist.
Abstract:
The present invention relates to a refill-container (10) for replenishing and/or reconditioning an insulation fluid (8) contained in an insulation space (4) of an electrical apparatus (2). At least a portion of the interior of the refill-container (10) defines a refill-fluid containment space (12), in which a refill-fluid (14) comprising an organo-fluorine compound is contained. According to the invention, the refill-container (10) further comprises an opening (18) designed to be brought from a sealed state, in which the refill-fluid (14) is hermetically contained in the refill-containment space (12), to an open state, in which the refill-fluid (14) is allowed to flow through the opening (18) out of the refill-containment space (12) into the insulation space (4).
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.