Circuit breaker has a high voltage, a compressed gas, a maneuvering energy assisted by the thermal effect of the arc

摘要

The invention relates to a circuit breaker has a high voltage and a gas is operating energy assisted by the thermal effect of the arc, comprising the stationary main contacts and the stationary arcing contacts, a moving assembly comprising the moving main contact and the movable arcing contacts, a blowing nozzle and a thermal volume in which the pressure of the gas increases under the action of the heating of the arc which is establishes to the separation of the contacts of arcs, characterizes in that it comprises means for exerting on the moving assembly 9 by the action of the pressure existing in the said thermal volume 3, 35, a force which is greater the force of resistance met by the moving assembly. p / p applications to the high voltage circuit breakers have a sulphur hexafluoride.