electric device with dense isoliergas, one with a window for observation of the composite insulator includes contacts equipped

摘要

P the electrical switchgear apparatus (1) comprises a high or medium voltage of the contacts of interruption (2) capable of occupying a position of opening and a closed position, which are arranged in a composite insulator formed by a rigid tube (3), surrounded by an elastomer envelope (4) whose outer surface defines a succession of annular fins. The rigid tube and the envelope made of elastomer are arranged to define an observation window (7) at least translucent, through which the open or closed position of the contacts of interruption is visible. / p