| 摘要 |
The invention relates to a novel type of support insulator which, because of its better resistance to impurities and precipitation, may be made considerably shorter than a conventional support insulator for the same voltage and which is able to withstand a considerably higher voltage at the same overall height, respectively. The support insulator (1) is intended to separate a first and a second electrode at different electric potential and has been given an outer pear-like shape. The insulator comprises a continuous supporting rod (8) of insulating material. The first electrode, which lies at high-voltage potential, is divided into a first (2) and a second (6) electrically conducting part, arranged around the rod (8) spaced somewhat from each other and electrically interconnected by means of a conductor (7). The second part (6) is thereby placed nearest the second electrode. These parts (2, 6) and the conductor (7) are enclosed by insulating material so that a first solid of revolution is formed around the first part and a cup-shaped second solid of revolution (4) is formed around the second part. The second solid of revolution (4) has been given a considerably larger diameter than the first solid of revolution (3). Further, it is suitable for the space (10) around the rod (8) between the cup-shaped solid of revolution and said second electrode to be enclosed by a shell of insulating material and for the space (10) to be filled with an insulating agent, for example SF6. |
