Circuit breaker comprising an improved gas flow management

A high-voltage circuit breaker filled with insulating gas having a main axis A, comprising:

• two arcing contacts axially facing each other and radially surrounded by an insulating nozzle;
• two main contacts axially facing each other and arranged radially outside of the insulating nozzle, each of the main contacts being assigned to one of the arcing contacts,
• wherein an insulating gas flowing from a storage chamber and heated by an electric arc in a region between the two arcing contacts is separated into a first gas flow and a second gas flow of opposite directions,
• wherein the first gas flow and second gas flow are conducted outside of the insulating nozzle from opposite directions at least partially toward a main gas chamber surrounding the main contacts,
• wherein the first gas flow flows toward the main gas chamber through a first intermediary gas chamber and the second gas flow flows toward the main gas chamber through a second intermediary gas chamber,
• wherein the second gas flow flowing in the second intermediary gas chamber is separated in a first portion directed to the main gas chamber and a second portion directed to an exhaust gas chamber,
• wherein the first portion of the second gas flow is smaller than the second portion of the second gas flow,
• wherein the second intermediary gas chamber is in fluidic communication with the main gas chamber via at least one first opening and is in fluidic communication with the exhaust gas chamber via at least one second opening,
• characterized in that an overall area of the at least one first opening is less than an overall area of the at least one second opening.