| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a three-phase collective type circuit, the breaker of which the tank diameter is small and which requires only a small space for installation. <P>SOLUTION: Three phases of a disconnector 4 are provided adjacent to a conversion part 5, and at least one phase of the disconnector 4 out of the there phases of three phase of the disconnector 4 is provided at a position which does not coincide with the other two phases of the disconnector 4 on a cross-sectional face of a ground tank 1. Specifically, regarding the explanation of a positional relationship, when the names of the respective three phases of the disconnector 4 are indicated by capital letters A, B and C, A-phase and C-phase of two phases which are most apart from each other are provided so that the concerned portions of the disconnector 4 are positioned on the right side from the conversion part 5 as shown in the figure, B-phase of the remaining one phase is provided so that the concerned portion of the disconnector 4 is positioned on the left side from the conversion part 5, and the adjacent A and B phases and the adjacent B and C phases are alternated with each other, respectively, thereby among the three phases of a movable contactor 6, only one B-phase geometrically positioned in the central part, as shown in the figure performs opening and closing operations in the reverse direction by 180 degrees. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
