| 摘要 |
PURPOSE:To provide adjusting an interrupted current even without changing a size of each part by providing a narrow part in a fusible unit, and interrupting a large current by explosion force of an explosive. CONSTITUTION:A narrow part 7A, whose central width is narrowed, is provided in a fusible unit 7. Since a plasma-made current value increases in the part 7A in accordance with increasing its width, by adjusting the width of the part 7A by cutting work, an interrupted current can be changed even without changing a size of the other parts. In the case of forming the unit 7 of a plurality of fine wires, since the plasma-made current value increases in the unit 7 in accordance with increasing a number of the fine wires, by adjusting only a number of the fine wires in the unit 7, the interrupted current can be changed even without changing the size of the other parts. |
