| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a safer switch gear which may be formed in small size with lower product cost and never induces explosion even when arc short circuit accident occurs within the inside. SOLUTION: Within a rectangular external box 12, three buses 27 for supplying the 3-phase power are extended keeping the adequate distance in the horizontal direction, a conductive metal is formed almost in the rectangular shape at the lower side of buses 27 and nine opening/closing units having a vacuum container 20 which is kept at its inside in the higher vacuum condition are arranged in a line in the longitudinal direction of the buses 27. Within the vacuum container 20, a main circuit switch means 14 for coupling or decoupling a conductor 16 in the bus side and a conductor 18 in the load side and a ground switch means 15 for coupling or decoupling the conductor 18 in the load side and a conductor 17 for ground are accommodated, respectively. At the external side of the vacuum container 20, a main circuit driver 23 for driving the main circuit switch 14 and a ground driver 26 for driving the ground switch 15 are provided.</p> |
