SWITCH CONTACT CHAMBER FOR ELECTRICAL CIRCUIT BREAKERS OF THE GAS BLAST TYPE

摘要

A circuit breaker of the gas blast type includes a switch contact chamber housing a stationary contact member and a movable contact member which is actuated by pressurized gas against a counter force applied by a spring which effects reclosure of the contacts when the pressurized gas ceases to be applied. Associated with the movable contact member is a dual piston structure operating in a damping cylinder which damps the opening movement of the movable contact as well as the reclosing movement.