| 摘要 |
<p>The invention relates to medium voltage cells employed in the national system for secondary power supply. According to the invention, the medium voltage cells use a single multifunction vacuum switching apparatus with three positions (closed, open, grounded), with solid insulation, actuated by permanent magnets electromagnets (37, 40) with magnetic locking, with local or remote control provided by an electronic module (6) performing the function of switching off for nominal currents, overload currents or short-circuit currents, separation and ground connection.</p> |
