变压器差动保护为了防止在充电时误动，采用的措施有（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69380' and id < 4491677 and id<>'4491677' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69380' and id > 4491677 and id<>'4491677' order by id asc limit 5