试题与答案

220kV线路零序电流保护最末一段应以适应故障点经100欧姆接地电阻短路为整定条件,

题型:判断题

题目:

220kV线路零序电流保护最末一段应以适应故障点经100欧姆接地电阻短路为整定条件,其零序电流定值应不大于300A。

答案:

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参考答案:答:筛检的应用原则:1)筛检的疾病是一个重大公卫问题2)治疗方法有效3)有进一步确诊方法与条件4)明确该病的自然史5)有较长潜伏期或领先时间6)有适当的筛检方法7)有良好的预期效益

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