对称三相电路星形联结，负载各相电流均为5A,若A相负载开路，中性线阻抗忽略不计时，中性线电流为（）A。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32633' and id < 2594921 and id<>'2594921' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32633' and id > 2594921 and id<>'2594921' order by id asc limit 5