The paper presents selectivity coordination of levels and sorts protection in low voltage distribution system.
系统阐述了低压配电系统中各级各类保护之间的选择性配合。
The paper adopts the fractal theory to judge the fault types and then USES the microcomputer logic judgement to realize selectivity of protection.
利用分形理论判断故障类型，再利用微机逻辑判断实现保护的选择性。
Protection for these isolated systems has been a relatively simple task, which is carried out using over current directional relays with selectivity.
采用具有选择性的过电流方向继电器，对这种相互分隔直流系统的保护相对就简单。
The result of simulation indicates that fault componentdifferential protection with capacitive current compensation has high sensitivity and good selectivity on al…
仿真结果表明，对于两端供电超高压长线，带电容补偿的故障分量相量差动保护具有明显地高灵敏度和选择性；
The catalyst has high catalytic activity, good selectivity and stability, environment protection, simple preparation and lower cost.
本发明所述催化剂具有催化活性高、选择性好、稳定性良好、环境友好、制备简单、成本低的优点。
The method has the characteristics of simple operation, good selectivity, cleanness and environment protection, so the yield and the quality of the valine are obviously improved.
该方法具有操作简单、选择性好、清洁环保的特点，使缬氨酸的收率和质量得到显著提高。
The method has the characteristics of simple operation, good selectivity, cleanness and environment protection, so the yield and the quality of the valine are obviously improved.
该方法具有操作简单、选择性好、清洁环保的特点，使缬氨酸的收率和质量得到显著提高。
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