施工现场临时用电北区一号总配电箱施工用电总负荷计算.doc

施工现场临时用电北区一号总配电箱施工用电总负荷计算 北区一号总配电箱拟投入的主要施工机械设备 序号 机械设备名称 型号规格 台数 额定功率（KW） 总功率(KW) 1 10#楼塔吊 C5013 1 36 36 2 11#楼塔吊 C5013 1 36 36 3 12#楼塔吊 C5013 1 36 36 4 钢筋调直机 GT6/14 3 7.5 22.5 5 钢筋切断机 QJ40-1 3 5.5 16.5 6 钢筋弯曲机 WJ40 3 3 9 7 砂浆搅拌机 WJ40 1 15 15 8 木工圆锯 MJ114 3 3 9 3.2、确定用电负荷: (1)10#楼塔吊 Kx=0.85Cosφ=0.6tgφ=1.33 将Jc=40%统一换算到Jc1=25%的额定容量 Pn=36kW Pe=n×(Jc/Jc1)1/2×Pn=1×(0.4/0.25)1/2×36=45.54kW Pjs=Kx×Pe =0.85×45.54=38.71kW Qjs=Pjs×tgφ=38.71Χ1.33=51.61kvar (2)钢筋调直机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs=0.65×7.5=4.875kW Qjs=Pjs×tgφ=4.88Χ1.02=4.97kvar (3)钢筋切断机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs=0.65×3= 1.95kW Qjs=Pjs×tgφ=1.95Χ1.02=1.99kvar (4)钢筋弯曲机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs=0.65×3=1.95kW Qjs=Pjs×tgφ=1.95Χ1.02=1.99kvar (5)11#楼塔吊 Kx=0.85Cosφ=0.6tgφ=1.33 将Jc=40%统一换算到Jc1=25%的额定容量 Pn=36kW Pe=n×(Jc/Jc1)1/2×Pn=1×(0.4/0.25)1/2×36=45.54kW Pjs=Kx×Pe=0.85×45.54=38.71kW Qjs=Pjs×tgφ=38.71Χ1.33=51.61kvar (6)砂浆搅拌机 Kx=0.75Cosφ=0.85tgφ=0.62 Pjs=0.75×15=11.25kW Qjs=Pjs×tgφ=11.25Χ0.62=6.97kvar (7)木工圆锯 Kx=0.65Cosφ=0.6tgφ=1.33 Pjs=0.65×9=5.85kW Qjs=Pjs×tgφ=5.85Χ1.33=7.8kvar (8)12#楼塔吊 Kx=0.85Cosφ=0.6tgφ=1.33 将Jc=40%统一换算到Jc1=25%的额定容量 Pn=36kW Pe=n×(Jc/Jc1)1/2×Pn=1×(0.4/0.25)1/2×36=45.54kW Pjs=Kx×Pe=0.85×45.54=38.71kW Qjs=Pjs×tgφ=38.71Χ1.33=51.61kvar (9)钢筋调直机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs=0.65×7.5=4.875kW Qjs=Pjs×tgφ=4.88Χ1.02=4.97kvar (10)钢筋切断机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs=0.65×3=1.95 kW Qjs=Pjs× tgφ=1.95Χ1.02=1.99kvar (11)钢筋弯曲机 Kx=0.65Cosφ =0.7tgφ=1.02 Pjs=0.65×3= 1.95 kW Qjs=Pjs×tgφ=1.95Χ1.02=1.99 kvar (12)钢筋调直机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs= 0.65×7.5=4.875kW Qjs=Pjs×tgφ=4.88Χ1.02 =4.97kvar (13)钢筋弯曲机 Kx=0.65Cosφ=0.7tgφ=1.02 Pjs= 0.65×3 = 1.95 kW Qjs=Pjs× tgφ=1.95Χ1.02 = 1.99 kvar (14)钢筋切断机 Kx=0.65Cosφ =0.7tgφ=1.02 Pjs=0.65×3 = 1.95 kW Qjs =Pjs×tgφ=1.95Χ1.02 =1.99 kvar (15)总的计算负荷计算，总箱同期系数取 Kx = 0.9 总的有功功率 Pjs = Kx×ΣPjs = 0.9Χ(38.71+4.88+1.95+1.95+38.71+11.25+5.85+38.71+4.88+1.95+1.95+4.88+1.95+1.95) = 143.589 kW 总的无功功率 Qjs = Kx×ΣQjs =0.9Χ(51.61+4.97+1.99+1.99+51.61+6.97+7.8+51.61+4.97+1.99+1.99+4.97+1.99+1.99) = 176.809