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:
A contact arrangement has a longitudinal axis (z) and comprises at least a first contact (4a) and at least a second contact (4b) interacting electrically and mechanically with each other for closing and opening the contact arrangement. The first contact (4a) is surrounded by a protecting cover element (2) in such a way that a contacting extremity of the first contact (4a) protrudes beyond the cover element (2). The first contact (4a) and the cover element (2) are arranged with respect to one another in such a way that a gap (7) is provided between them along at least a portion of their elongation, wherein the gap (7) has a first opening (10) towards a first volume (15) surrounding the first contact (4a). The cover element (2) comprises at least one chamber (9) connected at least to the gap (2).
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) 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:
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:
A contact arrangement has a longitudinal axis (z) and comprises at least a first contact (4a) and at least a second contact (4b) interacting electrically and mechanically with each other for closing and opening the contact arrangement. The first contact (4a) is surrounded by a protecting cover element (2) in such a way that a contacting extremity of the first contact (4a) protrudes beyond the cover element (2). The first contact (4a) and the cover element (2) are arranged with respect to one another in such a way that a gap (7) is provided between them along at least a portion of their elongation, wherein the gap (7) has a first opening (10) towards a first volume (15) surrounding the first contact (4a). The cover element (2) comprises at least one chamber (9) connected at least to the gap (2).
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).