电力电缆的运行中可能发生各种故障,如接地、短路、断线及闪络性故障。对于电缆故障的寻迹和定点,要有极大的耐心和正确的判断。在分析、判断过程中,需要排除一些干扰和假象,否则会走入误区,作出错误的结论。 1997年10月份,我们采用声测法,分别对两条故障电缆进行故障定点。其中一条长150m,3mm×120mm,额定电压6kV,发生闪络性故障,经近一天的查找,在6kV高压配电室里的电缆沟里发 Power cable operation may occur in a variety of faults, such as grounding, short circuit, disconnection and flashover fault. There is great patience and correct judgment of the tracing and pointing of cable faults. In the process of analysis and judgment, we need to eliminate some interferences and illusions, otherwise we will go to erroneous zones and make erroneous conclusions. In October 1997, we used acoustic measurements to troubleshoot two faulty cables respectively. One of which is 150m long, 3mm × 120mm, rated voltage 6kV, flashover occurs fault, after nearly a day of search, in the 6kV high voltage distribution room in the cable ditch hair