Abstract: A gas-insulated circuit interrupter is disclosed, the interrupter having an improved design for quenching electrical arcs. The interrupter includes a first contact and a second contact configured to alternatively connect to and disconnect from the first contact. One or both of the contacts are at least partially contained in an arcing chamber. The arcing chamber includes the point at which the contacts connect during current-carrying operation of the interrupter. The arcing chamber is at least partially surrounded by a heating chamber for accommodating a quenching gas. A channel connects the heating chamber and the arcing chamber and is positioned to direct the quenching gas toward the first contact and the second contact arcing area. One or more valves direct gas from the arcing chamber to the heating chamber when the interrupter is operated to interrupt a current.

Abstract: A gas-insulated circuit interrupter is disclosed, the interrupter having an improved design for quenching electrical arcs. The interrupter includes a first contact and a second contact configured to alternatively connect to and disconnect from the first contact. One or both of the contacts are at least partially contained in an arcing chamber. The arcing chamber includes the point at which the contacts connect during current-carrying operation of the interrupter. The arcing chamber is at least partially surrounded by a heating chamber for accommodating a quenching gas. A channel connects the heating chamber and the arcing chamber and is positioned to direct the quenching gas toward the first contact and the second contact arcing area. One or more valves direct gas from the arcing chamber to the heating chamber when the interrupter is operated to interrupt a current.

Abstract: A linkage for coupling to at least one rotatable shaft of a high voltage circuit breaker has an elongated body having a central body portion and opposed end portions. At least one of the end portions comprises a pair of parallel side walls and a bottom wall extending longitudinally from the central body portion along the end portion. Each of the parallel side walls comprises an outer side wall portion and an inner side wall portion. Each outer side wall portion extends longitudinally beyond an outer end of a lower part of the inner side wall portion and an outer end of the bottom wall. The parallel side walls and bottom wall form a slot having an open end adapted to receive a square or rectangular end of a rotatable shaft in the slot. The slot has an upper longitudinal opening between the adjacent upper edges of the side walls and a lower longitudinal opening between adjacent lower edges of the outer side wall portions that extend beyond the bottom wall.

Abstract: A high voltage circuit breaker with a gas-insulated tank is provided. Enclosed with the tank is an elongated heater having at least one heating element enclosed in an outer tube. The heater is located coaxially within the tank and is surrounded by the insulating gas.