中性点不直接接地系统，发生单相短路故障，非故障相电压上升为(    )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69462' and id < 4498575 and id<>'4498575' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69462' and id > 4498575 and id<>'4498575' order by id asc limit 5