| 摘要 |
1. Metal-clad cell with gaseous insulation for medium voltage power station comprising a metal insulated tank (12) connected to earth, and filled with electronegative insulating gas having a high dielectric strength, especially sulfur hexafluoride, said tank (12) containing the poles of at least one switch (14, 16, 18) having a first series of connecting terminals interconnected by a bar system (58), and a second series of connecting terminals passing through the tank (12) to cooperate with connecting members to receptor or net cables (20, 22, 102), characterized by the fact that the poles (14 R to 18 T) are identical and individually located above the bar system (58) accommodated inside the tank (12) shaped as a parallelipiped, being shifted crosswise from one another by predetermined gaps to form a vertical row parallel to the front (34) of the tank (12), the bar system (58) being located in the lower part of the tank (12) extending in cross-direction of alignment of the poles of the row, every pole of the swith (14, 16, 18) comprising a movable conducting pin (60) mounted in alternated sliding in vertical direction between a switch-on position F of the switch, an intermediate switch-off and insulation position 0 and a third earthing position T, the pin (60) comprising to its opposite ends a first contact (66) cooperating in the switchon position F with a fixed contact (68) linked together on to the bar system (58), and a second contact (74) being brought into engagement in position T with an earthing fixed contact (52) placed on the opposite side of the bar system (58) in vertical direction of the pole. |
