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根据矿山安全规定,用于矿井中的三相三线中性点不接地电源变压器,必须安装接地指示器或检漏装置,监测低压供电系统的安全用电情况,以便能及时发现用电设备和线路绝缘下降,防止因单相接地而引起的“两相触电”或“两相短路”事故,确保人身和设备的安全。鉴于矿井线路复杂,虽都安装了检漏装置,但耗资甚大,很少采用。目前较多使用小型灯泡作接地显示,但由于灯泡的发光电流,随规格不同有
According to mine safety regulations, for three-phase three-wire ungrounded power transformers in mines, earthing indicators or leak detection devices must be installed to monitor the safety of low-voltage power supply system, so that electricity can be found in time equipment and lines Insulation drop to prevent single-phase ground caused by the “two-phase electric shock” or “two-phase short circuit” accident, to ensure the safety of personal and equipment. In view of the complexity of the mine line, although the installation of the leak detection device, but costly, rarely used. At present, more use of small bulbs for grounding display, but because of the light bulb current, with different specifications