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Key words: low current earth electrical network, transient earth fault, zero-sequence energy , energy variation . 关键词：小电流接地电网，间歇性电弧接地故障，零序能量，能量变化。
But problems are exited in the configuration of distribution transformer and the setting for the stator earth fault protection. 但其配置及其接地保护的整定计算和校验却存在较多问题。
When a single-phase earth fault occurs in EHV/UHV transmission line,the single-phase reclosure will come into operation. 超/特高压输电线路发生单相接地故障后,将采用单相自动重合闸。
The principle of MLN series devices for detecting earth fault line in neutral ungrounded power system[J].Information on Electric Power,1994,2(2):7-11. MLN系列小电流接地微机选线装置动作原理[J].;电力情报;1994;2(2):7-11
The cables in the 2nd class are available to earth fault time not exceeding 2 hours generaly,maximum time is not exceed 8 hours. 额定电压属第二类的电缆，适用于接地故障时间一般不超过2小时，最长不超过8小时的场合。
FU Zhou-xing, WAN Geng.Methods of Fault Line Selection for Single Phase to Earth Fault in Networks with Ungrounded Neutral[J].Low Voltage Apparatus,2002,(3):43-47. [2]傅周兴;万耕.;小电流接地系统单相接地故障选线方法[J]
Principle of MLN series devices for detecting earth fault line in neutral ungrounded power system[J].Information on electric power,1994,2(2):7-11(in Chinese). MLN系列小电流接地微机选线装置动作原理[J].;电力情报;1994;2(2):7-11
The single-phase earth fault is the undercurrent earth system has the probability highest breakdown type, approximately composes all breakdowns number of times 80%. 单相接地故障是小电流接地系统发生几率最高的故障类型，约占所有故障次数的80%25。
A system whose neutral point(s) is (are) earthed through impedances to limit earth fault currents. 系统中至少有一个中性点通过具有阻抗的器件接地以限制接地故障短路电流系统。
This paper presents the way to configurate the distribution transformer, and the setting method for the stator earth fault protection with the example of Hubei Tiantang Pump-storage power plant. 针对配电变压器装置提供了一套较完整的配置和整定计算方法，并结合湖北天堂抽水蓄能电站的实例进行计算，为此类接地方式提供了可借鉴的方法。
By employing the DC earthed protection theory,this paper analyzes the characteristics of the converter transformer earth fault and the influence of converter commutation. 在简要介绍直流接地过流保护原理的基础上,分析了换流变阀侧接地故障的故障特征以及换流阀换相过程对故障电流的影响。
He is just listening in external of that room. 他正在那房间的外面留神听着。
Distribution system are universally the non-solidly earthed networks, and the single-phase to earth fault happens most frequently in the power system with ungrounded neutral. 小电流接地系统是配电网普遍采用的接地方式，同时单相接地故障是小电流接地系统发生率最高的故障。
This news program only covers external events. 这一新闻节目只报道国外消息。
When phase to earth fault occurs on a neutral non-direct grounded power system, it is necessary to select the faulted circuit quickly,but so far this has not been done very well. 中性点非有效接地配电网发生单相接地故障时，尽快选出故障线路对电网运行有重要意义，但选线问题迄今尚未能很好解决。
She sets great store by external politeness. 她很注重表面的虚礼。
Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
Seppo Hanninen,Matti Lehtonen,Erkki Antila.A Method for Detection and Location of High Resistance Earth Faults[J].Energy Management and Power Delivery,1998,2::495-500. 杨顺义;杨宏.;小电流接地系统接地检测(选线)的新判据[J]
The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
Abstract: How to locate the single-phase to earth faults in small current neutral grounding system of distribution system is a problem to actualize distribution automatization. 摘要：配电网中小电流接地系统单相接地故障的快速精确定位，一直是困扰配电系统自动化的难点。