Can reliably determine, within the community and bounds detection ma level and zero-sequence current phase short circuit fault current, automatic removal of single-phase ground fault and phase fault.
能可靠判断、检测界内与界外毫安级零序电流及相间短路故障电流，实现自动切除单相接地故障和相间短路故障。
The expression for short-circuit electrodynamic force of rectangular bus bars on the basis of the calculation of three-phase symmetry short-circuit current was fi.
本文首先根据系统发生三相对称短路时的短路电流，给出了三相矩形母线短路电动力的解析表达式。
The protect range is relational to short circuit type and phase when phase differential current connection mode is adopted.
当采用两相电流差接线方式时，保护范围与短路类型和短路相别有关。
In the paper, the reduced single phase short-circuit current equation expressing as positive sequence impi dance only is showed.
文中还提出了低压系统中只用正序阻抗表达的单相短路电流的简化计算公式。
Based on the detailed analysis of basic principle, the traditional three-phase short-circuit criterion of phase selection element based on sudden-change of phase current differential is improved.
在详细分析相电流差突变量选相基本原理的基础上，对传统相电流差突变量选相元件三相短路故障判据进行了改进。
WJJL1 intelligence over current relay is a typical electronic apparatus which has over current, short circuit, over voltage, under curent, phase faults and starting failure protective functions.
WJJL1智能过流继电器是典型的电子、电器技术相结合的产品。具有过电流、短路、缺相、过欠压、欠电流、相失衡及启动故障等保护功能。
This paper introduces a novel short circuit fault current limiter applicable to the three-phase ungrounded power systems.
介绍了一种适用于三相不接地系统的短路故障限流器。
With simulation by emtp it shows that both the random initial phase of short circuit current and the random direction and value of residual magnetism are the reason of above-mentioned phenomenon.
利用电磁暂态程序emtp进行机理分析的结果认为：短路电流起始相位的随机性以及互感器铁心剩磁方向的随机性会导致上述现象的出现。
According to the feature of distribution network structure, a practical short circuit calculation method based on fault current compensation and actual phase sequence presentation is put forward.
根据配电网的结构特点，提出了一种基于故障补偿方法与实际相序表示方法相结合的配电网短路电流实用计算方法。
The key points of the iec method for calculating the short circuit current and its heat effect of a three-phase current system are described and elucidated specifically by examples.
介绍iec三相交流系统短路电流计算方法的重点和短路电流热效应计算，并用例题介绍其具体使用情况。
Therefore, it is advisable to take the following method for grid three-phase short-circuit current calculation.
为此，建议采取以下的方法进行电网三相短路电流计算。
Copper busbar and busbar column should be able to sustain electric stress generated by electric current of three-phase symmetrical short-circuit of 50 kiloampere and above.
铜母线和母线支柱应能承受50千安及以上的三相对称短路电流所产生的电应力。
It can provide protection from over current, short circuit, undervoltage, phase failure, leakage lockout, and operation overvoltage.
具有过流、短路、欠压、断相、漏电闭锁、操作过电压等保护。
It can provide protection from over current, short circuit, undervoltage, phase failure, leakage lockout, and operation overvoltage.
具有过流、短路、欠压、断相、漏电闭锁、操作过电压等保护。
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