定时限过电流保护需要考虑返回系数，目的是为了(  )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69437' and id < 4496777 and id<>'4496777' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69437' and id > 4496777 and id<>'4496777' order by id asc limit 5