Patent ID: 7507931

Claim:
A switching chamber for a gas-insulated high voltage circuit breaker, containing an axially symmetrical housing and a contact arrangement held in the housing with two switching pieces, of which at least one is arranged such that it can move along the housing axis, in which the switching chamber housing has two hollow bodies which are each in the form of a cast metal part, which can be connected to a high voltage and an insulating tube holding the hollow bodies axially at a distance, wherein a first separation zone is formed in the surface of at least one of the two hollow bodies and separates two surface zones having different degrees of roughness from one another in the hollow body, of which the first surface zone is an unsmoothed surface of the hollow body and the second surface zone having a lower degree of roughness is a smoothed end side of the at least one hollow body, and wherein the first separation zone is in the form of a depression which extends annularly around the housing axis.