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随着煤炭工业生产机械化水平的提高,采区供电网路的电压等级也在逐级的上升。目前煤矿井下动力供电网的电压已经由380V 普遍的上升为660V,而综采工作面则上升为1140V。电压每升一级的升压系数总是2~(1/3),这是为了适应动力设备(电动机和变压器)改压方便而确定的。一个矿井在升压过程中,由于备用设备数量有限,往往需要经历一段较长的过渡时间,有的矿井需要几年甚至十几年才能完成
With the improvement of the mechanization level of coal industry production, the voltage level of the power supply network in the mining area has also risen step by step. At present, the voltage of underground power supply network in coal mine has generally increased from 380V to 660V, while that of fully mechanized mining face has risen to 1140V. The voltage step-up step-up factor is always 2 ~ (1/3), which is to meet the power equipment (motor and transformer) to facilitate the pressure and identified. A mine in the booster process, due to the limited number of backup equipment, often need to go through a long transition time, and some mines take several years or even ten years to complete