接地电阻不大于30欧姆。
接地电阻测量是接地施工中的一个重要环节。
Measurement of the grounding resistance is an important tache in grounding construction.
在高电阻率地域，将接地电阻降到设计值非常困难。
In the high resistivity area, it is very difficult to reduce the earthing resistance to the given value.
本文采用接地电阻作为评价钢筋锚杆锚固质量的标准。
Grounding resistance can be considered as the criterion of anchor quality.
提出计算双层土壤复合接地网接地电阻的新解析方法。
A new analytic method for grounding resistance of compound grounding grids in two-layer soil is deduced in this paper.
降阻剂并不能降低接地极在强雷电流下的冲击接地电阻。
Resistance-reducing agent does not reduce the impulse grounding resistance under large lightning current.
利用模拟实验测试了形状规则和不规则接地体的接地电阻。
The ground resistance of regularly-shaped and irregularly-shaped ground objects are tested with simulation experiments.
分析目前电气接地电阻测试存在的问题并相应提出一些建议。
The author analyses the problem of the testing electric grounding resistance in the moment, and provide some advice.
并侧重论述GEOX钳型接地电阻测试仪基本原理及其应用。
The principle of the GEOX clamped on ground meter and its application is emphasized.
此方案成功地应用于变电站接地电阻测量变频电源控制电路中。
This project is applied to the control circuit of the frequency converter power source of for measuring ground resistance in an electric substation.
从接地体的选取和敷设方式等角度探讨了影响接地电阻的因素。
The paper makes an approach to the factors influencing the ground resistence frome angles of selection and laying way of ground body.
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。
The main factors which affect the earth resistance are the earth model and parameters where the grounding body is buried.
输电线路的接地电阻，线路档距等因素对线路型避雷器的应用有影响。
Tower grounding resistance, distance between towers, etc can affect the function of line-surge arrester.
其环网接地装置必须结合建筑物特点进行设计，接地电阻可用简化公式估算。
So the loop network-earthing device must be designed in combination with building characters and the earthing resistance can be estimated with a simplified formula.
牵引变电所地网改造受场地限制，必须仔细设计才能够使接地电阻达到要求。
Since its reconstruction will be constrained by the site space, so the prudential design is needed so as to reach the required grounding resistance.
基于等值土壤电阻率的概念，导出了三层土壤中垂直棒接地电阻解析计算公式。
The analytic computational formula for grounding resistance of grounding rods in three-layer soil is derived based on the concept of equivalent soil resistivity.
并通过模拟试验分析了接地坑、自然水对降低空腹式接地装置的接地电阻的作用。
This paper analyzed the effect of shielding between hollow grounding devices and between hollow grounding device and ground grid.
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。
Three methods to judge the electric leakage of flange are put forward, that is, current direction method, pipeline current method and earth resistance method.
同时，文章通过市场调研，分析比较了市场上出现的几类杆塔接地电阻测试装置。
Furthermore, through market investigation, the paper analyzes and compares several Testing Devices for Tower Grounding Resistance.
简述了低压用电设备保护接地的意义，保护接地范围，以及测量接地电阻的方法。
In this paper, the significance and area of low voltage grounding protection are described and some methods for measuring grounding resistance are introduced.
从接地电阻的测量原理出发，讨论了采用短电流极引线测量地网接地电阻的可行性。
With the principle of measuring resistance, the paper carries through the theory analysis about possibility of measurement method with short electrode wire.
电力系统冲击接地电阻的测量是关系到电力系统稳定运行和电气设备安全的重要问题。
The measurement of grounding resistance under impulse voltage is of great importance for safe operation of power system and electronic equipment.
季节因素将影响地网的安全性能，导致地网的接地电阻、接触电压和跨步电压的改变。
The seasonal factor affects the safety of grounding system, and causes changes in the grounding resistance, the step and touch voltages on the ground surface above the grounding system.
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。
This paper studies a calculation method for earth resistance of a single vertical steel rodin rectangle concrete of uniform dielectric.
工程选用石墨掺量为10%的导电混凝土，使得接地装置的工频接地电阻均不大于0。
While graphite content in electrically conductive concrete applied in a grounding engineering is 10%, the power-frequency grounding resistance of the grounding devices is less than 0.
变电站避雷器安装位置和数量及输电线终端塔的接地电阻对雷电过电压有著直接的影响。
The location and quantity of arrestor and impulse grounding resistance of towers has direct influence on lighting overvoltage.
分析了布极方式对稳态接地电阻测量带来的测量误差，提出了多电极法的新型布极方式。
This paper present a new electrode arrangement by analyzing errors in grounding resistance measurement under steady voltage.
应用该模型进行了火花半径、接地体冲击地电位分布、电流波形及冲击接地电阻的计算。
Computation of spark discharge radius, impulse grounding potential distribution, current waveform and impulse grounding resistance is conducted by using this model.
强调了在现代防雷接地系统中，重要的是等电位系统的结构而不是接地电阻阻值的大小。
It is pointed out that in modern lightningproof and grounding systems, it is the structure of the equipotential system not the grounding resistance that matters.
强调了在现代防雷接地系统中，重要的是等电位系统的结构而不是接地电阻阻值的大小。
It is pointed out that in modern lightningproof and grounding systems, it is the structure of the equipotential system not the grounding resistance that matters.
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