| 摘要 |
PROBLEM TO BE SOLVED: To suppress acceleration of secular deterioration of a switch.SOLUTION: A switching device (a first switch 9A and a second switch 9B) is stored in a cabinet 11 installed in a container. A charging device 5 is installed outside the cabinet 11. Accordingly, heat generated from the charging device 5 has little effect on the switching device (the first switch 9A and the second switch 9B). As the result, an independent power supply unit 1 can suppress acceleration of secular deterioration of the switching device (the first switch 9A and the second switch 9B) as compared to a case where the charging device 5 is stored in the cabinet 11 together with (the first switch 9A and the second switch 9B).SELECTED DRAWING: Figure 3 |
