电缆作为电力传输的主要设备，一旦发生故障，就会导致电力网的电力中断，从而严重居民生活和企业生产。而且传统的电缆故障检测方法，比较费时费力。 地埋探测的方式大大提高了电缆故障的检测工作，因此得到了广泛的应用。

As the main equipment of power transmission, once the cable fails, it will lead to the power interruption of the power network, which will seriously affect the residents' life and enterprise production. Moreover, the traditional cable fault detection method is time-consuming and laborious. The method of buried detection greatly improves the detection of cable faults, so it has been widely used.

按照基本的测试步骤操作。先要了解故障产生的原因及电缆基本情况，例如是运行产生故障还是预试产生故障，是新电缆还是运行时间很长的电缆，电缆的大概长度，电缆中间有没有接头，电缆以前有没有出现过故障，电缆是直埋还是在电缆沟铺设，以及电缆类型等等。其次一定要搞清楚，电缆两端必须与其它线路断开，确保电缆无电，电缆周围环境处于状态。

Follow the basic test steps. First of all, we should understand the causes of the fault and the basic situation of the cable, such as whether the fault is caused by operation or pre-test, whether it is a new cable or a cable that has been running for a long time, the approximate length of the cable, whether there is a joint in the middle of the cable, whether the cable has failed before, whether the cable is directly buried or laid in the cable trench, and the type of cable, etc. Secondly, it must be clear that both ends of the cable must be disconnected from other lines to ensure that the cable has no electricity and the surrounding environment of the cable is in a safe state.

另外在，每次与电缆接线前，将电缆各相线与地用短路线连接放电，放电时必须先将短路线一端接地，另一端分别接电缆各相线放电。对于其它电器，例如电容器，试验变压器等，接线及去掉连接线前也要注意先放电，后接线。

In addition, before each connection with the cable, connect each phase line of the cable to the ground with a short line for discharge. When discharging, one end of the short line must be grounded first, and the other end must be connected to each phase line of the cable for discharge. For other electrical appliances, such as capacitors, test transformers, etc., pay attention to discharge before wiring and removing the connecting wire.

在设备测试电缆时，必须先用闪测仪低压脉冲功能，对电缆各相分别进行全长测试，看三相对铠装测试时，测试波形是否一致。对大部分高阻故障，各相测试波形是一致的。对低阻故障以及存在断相故障的高阻故障，故障相测试波形与测试的电缆全长就不一致，这样就可以直接用低压脉冲测试出故障距离。

When the equipment tests the cable, it must first use the low-voltage pulse function of the flash tester to test the full length of each phase of the cable respectively to see whether the test waveform is consistent when the three-phase pair armor is tested. For most high resistance faults, the test waveforms of each phase are consistent. For low resistance fault and high resistance fault with open phase fault, the test waveform of fault phase is inconsistent with the total length of the tested cable, so the fault distance can be directly measured with low-voltage pulse.

故障测试问题分为测试人员及设备。测试人员要注意仪器的接地和放电，设备主要是正确接线，可以按照相关说明书进行了解操作。

The safety problems of fault testing are divided into the safety of testers and the safety of equipment. The safety of testers should pay attention to the grounding and discharge of the instrument. The safety of equipment is mainly the correct wiring, which can be understood and operated according to the relevant instructions.

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