The working principle of the developed monitoring system is to assess comprehensively the insulation status of DC feeder cable through monitoring discharge signal and DC leakage current signal.

监测系统工作原理是通过监测电缆放电信号和直流泄漏电流信号综合评估电缆绝缘状态。

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This method is applied to detect the insulation of feeder line cable in metro substations and has already obtained good result.

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。

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Substation miniaturization and cable output feeder is one feature of city power grid construction and alteration.

城网建设与改造的特点之一是变电所的小型化和采用电缆出线。

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