The Influence Factors easy Neglected in Earth Resistance Measure 接地电阻测量中容易被忽略的影响因素
The sensitivity of the single fault with high earth resistance and the phase-selecting reliability of phase-phase to ground fault all are improved in contrast to the phase selector using superimposed differential current between phases. 与电流突变量差选相元件相比,提高了在高阻接地时选相的灵敏度和两相接地短路的可靠性。在元件选择方面则尽量采用商用元件。
The practical maintenance and calibration methods of 4102 earth resistance tester 4102接地电阻测试仪的维修与实用调校方法
If sharing the earth equipments with other systems, must base on the relevant standard and regulation, the system earth resistance should meet the requirements for the minimum resistance value. 若与其它系统共享接地装置时,必须按有关标准、规范执行,系统接地电阻值应满足其中最小阻值的要求;
Discussion on a Question about Measuring Earth Resistance of Tower 对一个测量杆塔接地电阻问题的探究
Discussion on the measures of reducing earth resistance under outdoor formidable environment 浅谈降低室外恶劣环境下接地电阻的措施
Study on the Earth Resistance Measurement by 6 Electrodes Method 用6电极法测量接地电阻的探讨
This paper educes general expressions of measuring earth resistance by multiple-electrode method, and on the basis of it, some systemic experiment analysis for four-current-electrode method is done. Finally it generalizes detailed rules and merits of multiple-electrode method. 导出了多电极法测量接地电阻时的一般表达式,并在此基础上,对四电流极法进行了系统的试验分析,最后总结出多电极法测量的详细规律和优点。
Application of the Mirror Image Method in Calculating the Earth Resistance and Step Voltage 镜像法在接地电阻与跨步电压计算中的应用
In this article, the moment method has been used in the calculation of earth resistance of a horizontal grid in rectangular concrete foundation in two layer soil. A general calculation procedure and applicable calculation program is given. 应用矩量法对二层土壤中矩形混凝土内水平网接地电阻进行计算,得出了数值计算方法,编制了通用计算程序。
Design of insulation resistance and earth resistance test system 绝缘电阻与接地电阻测试系统的设计
This paper studies a calculation method for earth resistance of a single vertical steel rodin rectangle concrete of uniform dielectric. 对均匀介质中矩形混凝土竖直单根钢筋接地体的基础接地电阻的计算方法进行了研究。
In order to make the data of earth resistance measures more accurate, cause relative person's attention and treat every exiguous step exactly, this article analyses the influence factors which are easy to be neglected in earth resistance measures. 本文对测量接地电阻值时容易被忽略的影响因素进行分析和总结,以引起相关工作人员重视,并正确对待检测中的每一细小环节,使接地电阻测量值更准确。
The influences on the test of ground wire caused by the earth resistance are analysed theoretically in this paper, and the testing error is analysed together. 从理论上分析了接地电阻对地线测试的影响,并对测试中产生的误差进行了分析。
This paper presents the application of BEM to foundation earth Field and obtains a numerical method of earth resistance of concrete foundation piles and calculating techniques are described in detail. 本文将边界元法应用于基础接地领域,获得了混凝土基础桩接地电阻的数值计算方法,论述了它的程序实现过程和处理技巧。
Numerical calculation of earth resistance on large scale grounding grids 大型地网接地电阻数值计算的初步研究
Based on the expression of precursory displacement field, the expressions of stress, tilt, groundwater and earth resistance are given, and the feasibility to inverse potential focal parameters with multiple precursory data is discussed. 根据地震前兆位移场的解析表达式,进一步给出各种应变、倾斜、地下水和地电阻率的前兆场的解析表达式。讨论了根据多种前兆场观测资料反演潜在震源参数的可能性。
This paper conducts the analysis and the discussion for the distorted situation of the earthing resistance examination data in the daily examination according to the survey principle of the present commonly used earth resistance instrumentation, and proposes the different solutions simultaneously regarding to the different causes. 根据目前常用接地电阻检测仪器的测量原理,对在日常检测中所出现导致接地电阻检测数据失真的情况进行了分析和探讨,同时针对不同的成因,提出了不同的解决方法。
Analyzed neutral earthing and no earthing system of low-voltage supply system, expounded characteristic of AC mobile electric power plant supply system and reduced methods of earth resistance. 对低压供电系统的中性点接地和不接地系统进行比较分析,阐述交流移动电站供电系统的特殊性及降低接地电阻值的措施。
In the end, by analyzing experimental results, this article generalizes common rules of earth resistance measurement based on multi-electrode method. 最后,文章经过对试验记录和试验结果的综合分析研究,归纳出多电极法测量接地电阻的普遍规律。
The computer programs have been worked out to calculate the earth resistance in complex grounding grid with random form for a rectangle concrete. The calculation results of documents [ 1,2] show the correctness of this method. 编制了能计算矩形混凝土内任意形状复合地网接地电阻的程序,用文献[1,2]的计算结果,检验了方法的正确性。
The Application of BEM to Foundation Earth& Calculation of Earth Resistance of Concrete Foundation Pile 边界元法在基础接地中的应用&混凝土基础桩接地电阻的计算
The Earth Resistance of Electrode in Two-layered Earth 双层大地中接地电极的接地电阻
The main factors which affect the earth resistance are the earth model and parameters where the grounding body is buried. 影响电力系统接地电阻的主要因素是接地体所在土壤的模型及参数。
By analyzing the earthing types, ways and environment of subway station installations, this paper pointed out the earth system of subway installations should adopt common earth method, and also put forward the principle for deciding its earth resistance and gave some notions. 通过对地铁车站设备接地种类及接地方式、接地环境的分析,指出地铁设备接地系统应采用共用接地方式,同时提出了共用接地时接地电阻的确定原则及其注意事项。
Three methods to judge the electric leakage of flange are put forward, that is, current direction method, pipeline current method and earth resistance method. 就绝缘法兰是否漏电,提出了电流方向法、管道电流法及接地电阻法等判断方法。
Measuring field earth resistance by using large current method 应用现场大电流法测量接地电阻的方法
This method is suitable for the fault location problem with earth resistance no larger than 3. 该方法适用于接地过渡电阻不大于3kΩ的配电网故障定位问题。