单电源线路速断保护的保护范围是（  ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69477' and id < 4500150 and id<>'4500150' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69477' and id > 4500150 and id<>'4500150' order by id asc limit 5