Self-extinguishing gas-blast circuit breaker

摘要

In the case of a self-extinguishing gas-blast circuit breaker, in the case of which the extinguishing gas pressure is produced by the arc itself in a pressure chamber 5 which can be enlarged by an auxiliary piston 4, the problem exists of dimensioning this device optimally for disconnecting both small operating currents and a large short-circuit current. This problem is solved in that holes 8 are released when switching off very powerful currents, which holes connect the pressure chamber 5 to an additional volume 7. <IMAGE>