下列哪种高频保护在电压二次回路断线时可不退出工作?（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69518' and id < 4503730 and id<>'4503730' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69518' and id > 4503730 and id<>'4503730' order by id asc limit 5