二次侧0.80-0.900.93-0.97总降压变电所(配电站)二次侧0.90-0.950.97一般如用电设备连续性较差,且回路数较多时,可适当取小一些,如受电设备数量很少,则可取大一些。一、有色冶金企业电气设备的需要系数和功率因数表表2-7序号用电设备名称计算数据Kxcosφtanφ(一)采矿场(坑内)1坑内水泵0.750.800.752尾矿水泵0.850.850.623生产、生活水泵0.900.80-0.850.75-0.624通风机0.70-0.850.800.755水银整流器0.70-0.750.750.886硅整流器0.75-0.850.90-0.940.49-0.357卷扬机0.55-0.600.800.758空压机0.850.820.709电耙绞车、载货绞车0.450.780.80(二)采矿场(露天)1多斗式挖掘机0.75-0.900.750.882单斗式挖掘机0.40-0.550.50-0.701.73-1.023单斗式挖掘机1米30.500.701.024单斗式挖掘机2米30.500.701.025冲击型钻机0.600.601.346旋转型钻机0.600.601.347皮带运输机0.750.601.338移动式空压机0.750.750.889固定式空压机0.850.820.7010移动式水泵0.700.750.8811固定式水泵0.800.800.7512起重机械0.250.601.3313采场照明0.701.00——14废石场照明0.901.00——15电耙绞车0.20-0.400.501.7316斜坡卷扬0.40-0.600.601.33(三)选矿厂1索道用电动机0.800.800.752铁板给矿机0.870.840.653翻车机0.200.800.754皮带给矿机、摆式给矿机0.700.720.965粗碎碎矿机(老虎口、旋回)0.580.710.99
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