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兖州矿业(集团)公司东滩煤矿研究出了只需一块电流表及电压表就可测量出矿井电网三相各相接地电容电流大小的简易方法,不仅安全方便而且测量精度高。①测量电网自然不平衡开口电压U0。在电网正常运行时去掉电压互感器二次开口三角上的负载,接上电压表。这时的电压表读数即为U0,记录这个数值。开口三角到电压表的引线不要拆除;②选定1个备用开关柜或带有下隔离开关的停送电柜,将选定的电容器或电容器组同电流表串联后可靠接地。必须将电容器放在绝缘垫上,外壳可靠接地;电流表两端用一根导线搭接,
Yanzhou Mining (Group) Co., Ltd. Dongtan Coal Mine developed a mere ammeter and voltmeter can be measured three phases of mine power grid grounding current capacity of a simple method, not only safe and convenient and high accuracy. ① measuring natural unbalance opening voltage U0. In the normal operation of the grid to remove the voltage transformer secondary openings on the triangular load, connected to the voltmeter. At this time the voltmeter reading is U0, record this value. Open the triangle to the voltmeter leads do not remove; ② Select a spare switchgear or switch cabinet with the next isolation switch, the selected capacitor or capacitor bank in series with the ammeter after a reliable grounding. Capacitor must be placed on the insulation pad, shell and reliable grounding; ammeter at both ends with a wire lap,