该法用于地铁牵引变电站直流馈线电缆绝缘性能检测中，取得了良好的效果。
This method is applied to detect the insulation of feeder line cable in metro substations and has already obtained good result.
介绍了电力用直流电源系统中绝缘检测采用的几种方法，并对各种方法进行了分析比较。
Some insulation detection methods, which used in power system for DC power system is introduced.
比较分析了几种直流系统常用的绝缘检测方法，采用乒乓式变电桥测量法，实现了接地电阻的准确在线测量。
The insulation methods of several DC systems are compared and analysed. A ping-pang variable bridge measurement is adopted. The ex - act on line detection of grounding resistance is realized.
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