Vacuum chamber with a one-piece metallic cover for self-centering

A medium voltage vacuum circuit breaker, comprising:

• at least one ceramic isolating cylinder with two face ends;
• a metallic cover configured for closing at least one of the two face ends of the ceramic isolating cylinder, the metallic cover including:
• an outer part and an inner part, wherein a distal end of the outer part of the metallic cover is thinner relative to a remainder of the outer part of the metallic cover and forms a metallic lid, wherein the metallic lid is connected to at least one of the two face ends of the ceramic isolating cylinder in a vacuum tight manner,
• wherein the metallic cover is formed in one piece and an inner part of the metallic cover fits with an inner girthed area of the ceramic isolating cylinder to realize a self-centering of the metallic lid to at least one of the two face ends of the ceramic isolating cylinder and wherein the metallic cover comprises:
• four parts, wherein a first part includes the metallic lid and extends axially away from at least one of the two face ends of the ceramic isolating cylinder, a second part extends radially away from the first part towards the interior of the at least one ceramic isolating cylinder, a third part extends basically parallel to the first part axially towards the interior of the at least one ceramic isolating cylinder, and a fourth part extends basically parallel to the second part, axially towards the girthed area of the at least one ceramic isolating cylinder;
• and
• an actuator for generating an operation force for transmission via a jackshaft arrangement to a vacuum interrupter with a vacuum chamber of the vacuum circuit breaker.