High tension circuit breaker with low operating energy

Abstract

A high tension circuit breaker containing a dielectric gas under pressure, the circuit breaker being of the type comprising at least one interrupting chamber comprising an insulating envelope filled with said gas and containing a fixed assembly including a fixed main contact (2) and a fixed arcing contact (4), and a moving assembly including a moving main contact (7) and a moving arcing contact (5), the interrupting chamber also containing a pair of secondary contacts and a blast cylinder opening out into a blast nozzle. The circuit breaker further includes first means (37, 38,104) for limiting the maximum separation distance between the secondary contacts to a value which is less than the maximum separation distance between the arcing contacts, and second means (60, 101) for preventing any arcs being struck during closure.

Dependencies are inferred from the claim text.