A.1.1~1.3)I10 B.1.3~1.5)I10 C.1.5~1.8)I10 D.1.8~2.0)I10
A.單相制 B.兩相制 C.三相制 D.四相制
A.Ir=0.01I+I0 B.Ir=(1.0~1.25)I C.Ir=(1.0~1.25)I+I0 D.Ir=(1.25~1.5)I+I0