The research achievements of the protection of fault arc at abroad were reviewed.
综述国外近年来在电弧故障防护方面的研究成果。
The physical phenomenon of fault arc was described and the standard of the protection of fault arc was introduced.
在阐述故障电弧物理现象的基础上，介绍了故障电弧防护标准。
After analysing a few of conventional protective circuits, it is point out that these circuits can not carry out overall protection on fault arc.
在分析了目前常用的几种常规保护线路后指出，它们并不能对故障电弧进行全面保护。
After analysing a few of conventional protective circuits, it is point out that these circuits can not carry out the overall protection on fault arc.
在分析了目前常用的几种常规保护线路后指出，它们并不能对故障电弧进行全面保护。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
An index within the gradient information of the arc voltage on the local region of zero can reflect fault location effectively.
含有电弧电压在零区梯度信息的指标可以有效地反映故障位置。
The distribution network fault location method based on over-heated arc is analyzed in various aspects, and its deficiencies are reviewed.
对基于过热弧搜索的配电网故障定位方法进行了多方面分析，讨论了其不足之处。
In this paper a novel intelligent distribution equipment we developed is presented, mainly for suppressing arc in the resonant grounding distribution networks and detecting the earth fault line.
介绍了我们研制的一种新型智能配电设备用于配电网中性点谐振接地系统中快速消弧并对故障线路选线。
Arc fault is a major cause of the electric fire, detecting on the arc fault comprehensively and effectively is the study of this article.
故障电弧是造成电气火灾的重要原因，实现全面而有效的对故障电弧的检测是本文的研究内容。
The influences of several factors such as harmonics, intermittent arc grounding, ct, load and fault resistance have been thoroughly analyzed, therefore, it is fundamental work for its application.
深入细致地分析了谐波、间歇电弧、电流互感器、负荷、过渡电阻等多个因素对故障选线结果的影响，为方案的实用化奠定了基础。
It is immune from the unbalanced status of network and the values of earthed resistance. To the complicated intermittent arc-earth fault, the proposed method also works well.
该方法不受电网平衡情况和接地电阻大小的影响，对复杂的间歇性电弧接地故障同样有效。
Its electric characteristic, structure feature, fault analysis, interface circuit and arc welding process program are analyzed and discussed.
对其电气性能、结构特点，故障诊断、接口电路及弧焊工作程序等作了比较全面的分析和讨论。
The arc fault diagnosis method proposed is proved to be reliable and practical by testing, and it may provide directive significance and application value to the protection for the arc fault.
根据样机的测试结果表明，本文提出的电弧故障诊断方法可靠有效，对我国的电弧故障保护技术具有指导意义和应用价值。
Fire accident can arise from low-voltage arc fault, and so it is necessary to detect arc fault.
低压故障电弧有引发火灾的危险，所以检测故障 电弧是必要的。
The self-extinguishing of the arc caused by a single-phase grounding fault depends mainly on the amplitude of the residual current at grounding point.
可自恢复性单相接地故障点的电弧是否能自然熄灭的决定因素是接地故障残流的大小。
An incorporate device of automatic arc-suppression coil and grounding fault line selection based on modularity structure was developed to improve its reliability and flexibility.
为提高可靠性和使用的灵活性，开发了一种模块化结构的自动消弧线圈及接地选线成套装置，给出了二者的硬件设计和接地故障子程序设计。
The reduction of the residual current of the ground-fault point is beneficial to the extinction of the grounding arc and to the reduction of the intermittent arc grounding over voltage.
减小接地故障点的残流有利于接地电弧的瞬间熄灭及降低间歇性电弧接地过电压。
The arc suppression coil with three phases and five columns can achieve automatic trace and compensation for ground fault capacitive current of power system by the method of rectifying i.
介绍了三相五柱式消弧线圈及其自动跟踪补偿原理，该消弧线圈在结构上突破了传统消弧线圈的模式，将传统的接地变压器和消弧线圈有机地结合成一个整体。
In the early 80's, HDW invented, patented and developed the Arc Reflection Technology, which continues to represent the state-of-the-art fault locating method for solid dielectric cables.
80年代早期，HDW研发的，获得专利权的弧反射研发技术仍然是故障检测的高级方案，用于固体介质的电缆。
According to tectonic zonation, the coal basin mainly restricted by secondary fault depression of NE reflex arc, meanwhile secondary EW and NE composite convergence existed.
从总的区域构造分布看，含煤盆地沉积主要受北东向反射弧的次一级断裂坳陷所制约，同时也存在着次一级的东西向与北东向复合交汇控制特征。
When an arc fault occurs, the arc current can produce local high temperature and may cause fires if combustible materials surrounded.
发生电弧故障时，很小的电弧电流都能产生局部高温，一旦周围有可燃物就容易导致火灾发生。
The utility model provides an ultrasonic fault detection comparing test block for a high-voltage pillar porcelain insulator, consisting of a test block body and arc grooves.
本实用新型提供一种高压支柱瓷绝缘子超声波探伤对比试块。
The utility model provides an ultrasonic fault detection comparing test block for a high-voltage pillar porcelain insulator, consisting of a test block body and arc grooves.
本实用新型提供一种高压支柱瓷绝缘子超声波探伤对比试块。
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