| 摘要 |
Provided is a switch box comprising: a first circuit substrate (40); a pair or busbars (41, 61) provided to the first circuit substrate (40); and a first switch unit (SW1) that is provided to the first circuit substrate (40) and that opens and closes a circuit between the busbars (41, 61). A second circuit substrate (60) can be attached to and detached from the first circuit substrate (40), and the second circuit substrate (60) comprises: one busbar (41); and a second switch unit (SW2) that opens and closes a circuit between the one busbar (41) and the busbar (61) of the first circuit substrate (40). |
