1) 4-pole switch
4极开关
1.
In the paper, it is analyzed briefly that remarkable problems existed in electric power design such as distributing line protection, protective selectivity, 4-pole switch application, EPS application and soft starter through selective examination on design quality and common correct settlement method is put forward.
通过设计质量抽查工作,就配电线路保护、保护选择性、4极开关应用、EPS应用和软起动器在电气设计中的问题作了简要分析,并提出通常正确的做法。
2) polarity switch
极性开关
1.
When used QJ35 variable voltage proportion electric bridge to measure the variable voltage proportion of nonstandard trial transformer,I found that in the specification of which,the description related to the polarity switch position had made some mistakes.
使用QJ35变压比电桥测量非标准试验变压器变压比时,发现其使用说明书中,关于极性开关位置的说明存在问题,对其问题之处提出了个人的看法,总结了三相变压器12种联接组的组别极性,以便于试验工作者的查阅与借鉴。
3) four-pole switch
四极开关
1.
The paper mainly gives the work condition of neutral current,introduces application of four-pole switch in different grounding systems and problems to be noticed.
文章主要阐述了中性线的工况和各种不同接地系统中四极开关的应用及应用中需要注意的问题。
2.
The article describes the conditions in selection of four-pole switch,applicable site and points out the cautions in actual projects.
论述了四极开关选择的条件,应用场所,指出了在实际工程中应注意的问题。
3.
The application scope and gist of three-pole and four-pole switch are emphasized with an engineering example.
文中阐述了ATSE的概念、分类、性能特点以及为交换局双电源系统选择ATSE时应考虑的因素,重点分析了三极开关和四极开关的适用范围和选择依据,并通过工程实例予以说明。
4) change pole switch
变极开关
6) three-pole switch
三极开关
补充资料：“质子-电子偶极-偶极”质子弛豫增强
“质子-电子偶极-偶极”质子弛豫增强
物理学术语。原子核外层中不成对的电子质量小，但磁动性很强，可使局部磁场波动增强，促使氢质子弛豫加快，从而使T1和T2缩短，这种效应即为PEDDPRE。过渡元素和镧系元素大部分在d和f轨道有多个不成对电子，所以其离子往往具有PEDDPRE，可用来作顺磁性对比剂，如钆(Gd)。Gd在外层有7个不成对电子，具有很强的顺磁性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条