A.8M B.10M C.15M D.20M
A.第一臺變壓器額定電流的0.31倍 B.第一臺變壓器額定電流的0.28倍 C.第一臺變壓器額定電流的0.25倍 D.第一臺變壓器額定電流的0.45倍
A.0.2 B.0.4 C.0.6 D.0.8