为了检查差动保护躲过励磁涌流的性能，在对变压器进行冲击合闸实验时，必须投入差动保护。（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69017' and id < 4467219 and id<>'4467219' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69017' and id > 4467219 and id<>'4467219' order by id asc limit 5