| 摘要 |
<p>The invention relates to a modular triple pole switch disconnector for open-wire medium-voltage lines, consisting of a framework (1) meant to support an assembly of three parallel and equally spaced single pole switch modules (A), each said single pole switch module (A) consisting of a pair of support insulators (9 and 3) comprising a fixed insulator (9) and a mobile insulator (3), on which there are located a main contact (10 and 5) and an auxiliary contact (8 and 6). The main contact (10 and 5) comprises a fixed part, made of a self-positioning contact (10) provided on the fixed insulator (9) in order to ensure the continuity of the current path of the open-wire medium-voltage lines, and a mobile part, made of a knife contact (5) provided on the mobile insulator (3) for on-load connection-disconnection of the open-wire electric line. The auxiliary contact (8 and 6) consists of a fixed part made of a breaking spring (8) located on the fixed insulator (9) having the role of breaking the electric arc between the self-positioning contact (10) and the knife contact (5), and a mobile part made of a hanging hook (6) placed on the mobile insulator (3) and having the role of hanging the breaking spring (8) for breaking the electric arc. The claimed switch disconnector also comprises, for each switch module (A), a fixed or mobile contact (19 and 7) for the direct ground connection of the open-wire medium-voltage line.</p> |
