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A Problem on Setting to Be Taken Care of Negative-sequence Current Protection of HV Motor
Author(s): 
Pages: 12-13,16
Year: Issue:  4
Journal: ELECTRIC SWITCHGEAR

Keyword:  异步电机负序电流继电保护整定计算;
Abstract: 分析比较了高压异步电动机断相和电动机外部两相不对称短路两种情况下所产生的负序电流,指出外部发生两相短路时在非故障电动机回路产生的较大负序电流,能够起动负序电流保护.这在保护整定时必须引起注意.并提出采用延时动作来与其它相关保护配合的措施,以防止负序电流保护误动作.
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