直流系统接地故障定位探测仪设计

DC System Grounding Fault Detector

介绍了一款低成本直流系统接地故障定位探测仪的设计方法。该仪器信号发生部分在直流系统正负母线注入低频方波电压信号,故障定位部分则利用直流钳表对支路中的低频电流信号进行检测,通过AD转换后,利用单片机对采集的数据进行分析和处理,来实现对直流系统接地故障的定位判断。

The design plan of a low cost direct current system grounding fault detector is described. Square wave voltage signal with low frequency is injected into the positive bus and the negative bus from the signal generator part of the detector. The fault location part of the detector detects the current signal existing in each branch via a current transformer. The single chip microprocessor in this part processes the data horn AD convert and displays the result.