单侧电源线路的自动重合闸装置必须在故障切除后，经一定时间间隔才允许发出合闸脉冲，这是因为（  ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id < 4500988 and id<>'4500988' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id > 4500988 and id<>'4500988' order by id asc limit 5