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:
A high voltage DC circuit breaker comprises a semiconductor switching assembly (3) in series to a mechanical switch (4). When the semiconductor switching assembly (3) is switched off due to a current fault, the residual current (I R ) flowing through the arresters (9) of the assembly (3) is switched off by the mechanical switch (4). A capacitor (12) arranged parallel to mechanical switch (4) leads to passive resonance effects, which in turn induce current zero crossings in its arc. The current zero crossings allow to extinguish the arc reliably. The mechanical switch (4) can be an AC circuit breaker.
Abstract:
A gas insulated type circuit breaker (1) comprises a housing (4) defining a gas volume for a dielectric insulation gas; a first nominal contact element (42) and a second nominal contact element (52) adapted for selectively carrying or interrupting a nominal current between them, wherein the first nominal contact element (42) is movable along an axis (2) of the circuit breaker, and the second nominal contact element (52) is fixed relative to the housing (4); a first arcing contact element (62) and a second arcing contact element (72) adapted for selectively carrying or interrupting an arcing current between them, wherein the first arcing contact element (62) and the second arcing contact element (72) are movable along the axis (2); a first gear (20) coupling the first nominal contact element (42) and the first arcing contact element (62) to each other such that for circuit breaking the first nominal contact element (42) and the first arcing contact element (62) are both moved in a first direction along the axis (2); and a second gear (30) coupling the second arcing contact element (72) to one of the first nominal contact element (42) and the first arcing contact element (62) such that for circuit breaking the second arcing contact element (72) moves in a second direction along the axis (2) opposite to a first direction.
Abstract:
A gas insulated type circuit breaker (1) comprises a housing (4) defining a gas volume for a dielectric insulation gas; a first nominal contact element (42) and a second nominal contact element (52) adapted for selectively carrying or interrupting a nominal current between them, wherein the first nominal contact element (42) is movable along an axis (2) of the circuit breaker, and the second nominal contact element (52) is fixed relative to the housing (4); a first arcing contact element (62) and a second arcing contact element (72) adapted for selectively carrying or interrupting an arcing current between them, wherein the first arcing contact element (62) and the second arcing contact element (72) are movable along the axis (2); a first gear (20) coupling the first nominal contact element (42) and the first arcing contact element (62) to each other such that for circuit breaking the first nominal contact element (42) and the first arcing contact element (62) are both moved in a first direction along the axis (2); and a second gear (30) coupling the second arcing contact element (72) to one of the first nominal contact element (42) and the first arcing contact element (62) such that for circuit breaking the second arcing contact element (72) moves in a second direction along the axis (2) opposite to a first direction.
Abstract:
A simplified construction of a gas-insulated high-power circuit breaker with a saving of components is achieved by at least one hole and at least one leaf spring, which is fastened on one side and is elastically bendable in dependence upon the pressure of the insulating gas in the compression volume, being formed in a valve plate of the valve. The bendable spring closes off the hole when the circuit breaker closes and opens it when the circuit breaker opens as soon as the pressure of the compressed insulating gas in the compression volume exceeds the value of the gas pressure in the low-pressure chamber by at least two bar.