| 摘要 |
PURPOSE: To obtain a gas-insulated switchgear which is not large, whose costs are not increased and which suppresses a rise in the temperature of a conductor when a large current flows. CONSTITUTION: Fins 21, 22 for heat radiation are installed on both faces of a lid plate 11 for a GIS. The fins installed on the inside and outside faces of the lid plate increase the surface area of a container, and the heat radiation characteristic of the container is enhanced. Thereby, since heat generated by conductive parts 4 to 7 for the GIS can be radiated, with high efficiency, to the outside of the container, the temperature rise of the conductive parts can be suppressed even when a large current flows to the GIS. In addition, since the fins are installed only on the lid plate, the GIS is not made large and its cost is not increased sharply. In addition, the tip of the fin on the side at the inside of the container out of the fins installed on the lid plate is bent so as to increase an area facing a charged part, and a shape which relaxes an electric field can be formed. |
