中性点非直接接地电网发生单相接地时，线电压将发生变化。（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69376' and id < 4491305 and id<>'4491305' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69376' and id > 4491305 and id<>'4491305' order by id asc limit 5