分析表明，线路末端三相故障时，线路首端的测量阻抗不与故障距离成正比。
The analysis shows that the measured impedance at the head of the line is not proportional to the fault distance when a three-phase fault occurs at the end of the line.
故障发生后，对于不同的故障性质，线路首端重合闸安装处的电压谐波含量是不同的。
After faults occur, different kinds of faults have different percentages of voltage harmonic signals which can be measured on busbar.
然后在线路首端注入电流，通过探测器检验几个分支上是否有电流流过，检测到电流的即为故障点所在的分支。
After injecting current into the head of line, the detector can check whether these branches flow current, the fault branch is that the current has flowed.
一接头，设置在上述芯线及包覆层的首端与电源的供电线的连接处，用以包覆所述的铜绞合线与电源的供电线的电气连接的塑料罩壳。
A joint. It is set at the connection of the cover head of core with power supply wire to cover the plastic casing of electric connection of copper strand and power supply wire.
清单11首先创建了一个新的客户端类。
本系列产品适合安装于通信局站传输设备机房机列的端首，为通信设备进行直流电源分配和故障告警指示；
The series fit to be installed at the start of the equipment row in the transmission equipment center of communication stations.
本系列产品适合安装于通信局站传输设备机房机列的端首，为通信设备进行直流电源分配和故障告警指示；
The series fit to be installed at the start of the equipment row in the transmission equipment center of communication stations.
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