A.2%
B.3%
C.6%
D.7%

A.110V
B.220V
C.380V
D.410V

A.10KVA
B.20KVA
C.30KVA
D.15KVA

A.150~270v
B.160~250v
C.154~286
D.160~270v

A.故障定位
B.故障显示
C.故障切除
D.故障报警

A.60°
B.90°
C.120°
D.180°

A.输出额定电流
B.输入额定电流
C.输出额定电压
D.输入额定电压

A.50Hz轨道电路
B.电源屏总容量
C.50KVA产品类别
D.智能电源屏

A.DC220+20-10V
B.DC24+3.5-0.5V
C.AC24±3V
D.DC24～95±5V

A.DC220+20-10V
B.DC24+3.5-0.5V
C.AC24±3V
D.DC24～95±5V

A.0.8
B.1
C.1.2
D.1.6