对于自耦变压器的接地保护，当有选择性要求时应装设（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69254' and id < 4484096 and id<>'4484096' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69254' and id > 4484096 and id<>'4484096' order by id asc limit 5