A.3 B.2 C.2.5 D.1.5
A.0.2m B.0.35m C.0.4m D.0.5m
A.先拉開(kāi)電源側(cè)隔離開(kāi)關(guān) B.先拉開(kāi)負(fù)荷側(cè)隔離開(kāi)關(guān) C.先拉開(kāi)哪側(cè)的隔離開(kāi)關(guān)都行