A.30° B.45° C.60° D.75°
A.600m B.800m C.900m D.1000m
A.1~1.2km B.1~1.5km C.1~2km D.1~2.5km
A.长期运行线电压 B.长期运行的最高相电压 C.长期运行最高的线电压的有效值 D.故障时最高相电压
A.1/3~2/3 B.1/3~1/2 C.1/4~3/4 D.1/5~2/5