多项选择题

下列哪几种故障属于电力系统安全稳定计算的Ⅱ类故障类型？（ ）

A.发电厂的送出线路发生三相短路故障
B.单回线路发生单相永久接地故障重合闸不成功
C.单回线路无故障三相断开不重合
D.任一台发电机组跳闸
<上一题 目录 下一题>
热门 试题

未分类题
听力原文：M: The city council has finally voted the funds to build a new high school.W: It's about time they did it. I don't know what took them so long.What's the woman's opinion about the school?A.It's too expensivE.B.It isn't needeD.C.It should be built.D.A college would be better.
A.W:
B.
What's
C.It's
D.
B.It
E.
C.It
F.
D.A
G.
多项选择题
在发电厂、变电站设计中，电流互感器的配置和设计原则，下述哪些是正确的？（ ）
A.对于中性点直接接地系统，按三相配置
B.用于自动调整励磁装置时，应布置在发电机定子绕组的出线侧
C.当测量仪表与保护装置共用电流互感器同一个二次绕组时，仪表应接在保护装置之前
D.电流互感器的二次回路应有且只能有一个接地点，宜在配电装置处经端子排接地
相关试题