Puffer-type medium or high tension circuit breaker

Details Puffer-type medium or high tension circuit breaker Puffer-type medium or high tension circuit breaker

1991-02-06

1992-06-30

Broome, Harold

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148B, H01H 3382

Patent

active

051265168

ABSTRACT:
A medium or high tension arc-puffing circuit breaker comprising a gastight casing filled with a dielectric gas and containing a semi-fixed first contact electrically connected to a first current terminal and a moving second contact which is electrically connected to a second current terminal and which is mechanically connected to a drive member, said semi-fixed contact being fixed to a piston that moves in a cylinder, said piston delimiting a first volume in the arc zone end of said cylinder and a second volume in the other end thereof, said semi-fixed contact being subject to the action of a spring urging the semi-fixed contact in the same direction as the moving contact during a disengagement operation, wherein the circuit breaker includes means for limiting the speed and the amplitude of the motion of the piston in the spring-compressing direction during a disengagement operation on a short circuit current, said means also enabling unpolluted gas to be injected into the arcing contact zone during the reengagement operation that follows said disengagement operation.

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