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DW45系列断路器的单相接地故障保护的探讨 被引量:1
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作者 连理枝 《华通技术》 2002年第2期21-24,共4页
论述DW45系列智能型万能式断路器的单相接地故障保护中的差值和地电流两种型式,分别介绍它们的工作原理、种类、接线、用途和选用范围。
关键词 DW45系列 断路器 单相接地故障保护 差值 地电流式
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The relations between density of FACs in the Plasma Sheet Boundary Layers and Kp index 被引量:8
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作者 CHENG ZhengWei SHI JianKui +2 位作者 ZHANG TieLong DUNLOP Malcolm LIU ZhenXing 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第11期2987-2992,共6页
We have studied 172 field-aligned currents (FACs) cases observed by the ClusterlI satellites when they crossed the plasma sheet boundary layer (PSBL) in the magnetotail from July to October 2001. We mainly analyze... We have studied 172 field-aligned currents (FACs) cases observed by the ClusterlI satellites when they crossed the plasma sheet boundary layer (PSBL) in the magnetotail from July to October 2001. We mainly analyzed the relationship between the characteristic of FACs at the PSBL in magnetotail and the Kp index. The main results indicated the followings: 1) In the different geomagnetic activity levels, the relative occurrence of FACs in PSBL increased monotonically with geomagnetic activity. 2) The density of FACs in PSBL increased monotonically with Kp index. In the storm main phase, the density of FACs increased dramatically, the maximum FACs approximately equaled 19.05 nA m-2 while Kp equaled 5.3) The variation of FACs density in PSBL was consistent with the variation of the Kp index. However, when AE〈800 nT, FACs density in PSBL increased with increasing AE, and when AE〉800 nT, it decreased with increasing AE. Therefore, our results suggested that the FACs density in PSBL had a closer correlation with Kp index. 展开更多
关键词 field-aligned currents plasma sheet boundary layer Kp index AE index
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