断路器失灵保护时一种近后备保护，当元件断路器拒动时，该保护动作隔离故障点。（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69381' and id < 4491753 and id<>'4491753' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69381' and id > 4491753 and id<>'4491753' order by id asc limit 5