Patent ID: 6646850
Filing Date: 2003-11-11
Classification: H01H

Abstract:
A high-voltage power breaker comprising:two arcing contact pieces which are separated from one another when disconnected and between which an arc is struck in an arcing area filled with a quenching gas which has been heated by the arc; an insulating nozzle surrounding the arcing area, an insulating nozzle including a constriction point from which the quenching gas flows in an outlet flow direction through at least one outlet flow channel having a number of areas which the quenching gas passes through successively, wherein a first area faces the constriction point of the nozzle and has a specific flow resistance which is less than that of the constriction point, the first area in the outlet flow direction of the quenching gas is followed by at least a second area, a third area and a fourth area, in which a specific flow resistance of the second area and of the fourth area, respectively, is greater than a specific flow resistance of an immediately preceding area in the outlet flow direction, and the specific flow resistance of the third area is less than that of the second area.