对自耦变压器的零序电流保护，其零序电流取自：（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69396' and id < 4492272 and id<>'4492272' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69396' and id > 4492272 and id<>'4492272' order by id asc limit 5