大接地电流系统中，发生接地故障时，零序电压在(    )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69458' and id < 4498285 and id<>'4498285' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69458' and id > 4498285 and id<>'4498285' order by id asc limit 5