利用系数法确定计算负荷

1、.5.2.5系数法确定修正运算负荷在使用系数法决定补正负荷的情况下，无论补正算范围的大小，都必须求出该补正算范围内的电功耗设备的有效台数和最大系数，计算结果。(1)电功耗设备组在最大负荷等级内的平均负荷：有效功率kW(5-2-12 )无功功率kvar(5-2-13 )式中的用电气设备组的设备电力、kW；用电器组在最大负载等级内的利用系数如表5-2-6所示用电气设备组的功率因数角的正切值如表5-2-6所示。表5-2-6利用系数、及电气设备集团名称一般工作制小批量生产用金属切削工作母机(小型车、刨、插、磨粉机、钻床、砂透平机等)0.10.120.501.73一般工作制大量生产用金属切削工作母机0.

2、12至0.140.501.73重作业制金属切削工作母机(冲压、自动车床、六角车床、粗磨削、铣刨机、大型车床、刨床、成形铣刀、立车、钻床)0.160.551.51小批量生产金属热加工机(锻造锤传动装置、锻造机、拔丝机、清扫鼓、磨粉机等)0.170.601.33大量生产金属热加工机0.200.651.17生产用通风机0.550.800.75卫生通风机0.500.800.75泵、空气压缩机、电动发电机组0.550.800.75移动式电动手工工具0.050.501.73没有联摇滾乐装置的连续输送机械(曳引机、皮带运输机、螺旋输送机等)0.350.750.88联摇滾乐的连续运输机械0.500.750.8

3、8电动葫芦起重机和电动葫芦(=100% )0.15至0.200.501.73电阻炉、燥箱、加热设备0.55至0.650.950.33实验室用小型电热设备0.351.000.0010吨以下的电弧炼钢炉0.650.800.75单头直流电弧熔接机0.250.601.33多头直流电弧熔接机0.500.701.02单头电弧焊接变压器0.250.352.67多头弧焊变压器0.300.352.67自动电弧熔接机0.300.501.73定点熔接机及缝焊机0.250.601.33熔接机及铝铆钉加热器0.250.701.02商用感应电炉0.750.352.67射频波感应电炉(电动发电机组用)0.700.800.7

4、5射频波感应电炉(真空管振荡器用)0.650.651.17(2)平均利用系数为(5-2-14 )式中各电功耗设备组的平均负荷的有功功率之和、kW各电功耗设备组设备功率之和，kW。(3)电功耗设备的有效台数是将不同的设备电力和运行制的电功耗设备台数换算成相同的设备电力和运行制的有效值。 故乡(5-2-15 )式中个电功耗设备的设备功率，kW。1 )有效台数为4台以上，且最多1台设备电力与最小1台设备电力之比m3时(5-2-16 )在确定值时，能够省略组内的总电功率为所有组的总设备电力的5%以下的最小电功耗设备。2)3和0.2的情况下(5-2-17 )用上式求出的比实际台数多的话就取。3)3和0.

5、5h时，最大系数按下式换算有效台数和平均利用系数，从表5-2-8调查。表5-2-8最大系数0.10.150.20.30.40.50.60.70.80.943.433.112.642.141.871.651.461.291.141.0553.232.872.422.001.761.571.411.261.121.0463.042.642.241.881.661.511.371.231.101.0472.882.482.101.081.581.451.331.211.091.0482.722.311.991.721.521.401.301.201.081.0492.562.201.901.651.

6、471.371.281.181.081.03102.422.101.841.601.431.341.261.161.071.03122.241.961.751.521.361.281.231.151.071.03142.101.851.671.451.321.251.201.131.071.03161.991.771.611.411.281.231.181.121.071.03181.911.701.551.371.261.211.161.111.061.03201.841.651.501.341.241.201.151.111.061.03251.711.551.401.281.211.17

7、1.141.101.061.03301.621.461.341.241.191.161.131.101.051.03351.561.411.301.211.171.151.121.091.051.02401.501.371.271.191.151.131.121.091.051.02451.451.331.251.171.141.121.111.081.041.02501.401.301.231.161.141.111.101.081.041.02601.321.251.191.141.121.111.091.071.031.02701.271.221.171.121.101.101.091.061.0