| 摘要 |
<p>@ An electrical isolator has isolating contacts (3, 4) located within a tank (2) containing insulating gas. The moving contact (4) is actuated by a shaft (10) which can be driven by a motor (25). The condition of the contacts (i.e. whether they are open or closed) is sensed by an optical position detector (41) wich detects the angular position of the shaft (10) and therefore the position of the movable contact (4), and which transmits an optical signal via an optical cable (51) to an optical control unit (50) remote from the operating mechanism of the isolator.</p> |
