小区施工临时用电方案.doc

施工临时用电方案计算书某某市某某区某某茗苑110楼工程；属于剪力墙结构;地上32层;地下1层；建筑高度：95.7m；标准层层高：2.9m ；总建筑面积：16556平方米；总工期：0天；施工单位：。本工程由投资建设，设计，地质勘察，监理，组织施工；由担任项目经理，担任技术负责人。一、编制依据低压配电设计规范GB50054-95中国建筑工业出版社建筑工程施工现场供电安全规范GB50194-93中国建筑工业出版社通用用电设备配电设计规范GB50055-93中国建筑工业出版社供配电系统设计规范GB50052-95中国建筑工业出版社施工现场临时用电安全技术规范JGJ46-2005中国建筑工业出版社建筑施工安全检查标准JGJ59-99二、施工条件施工现场用电量统计表:-序号 机具名称 型号 安装功率(kW) 数量 合计功率(kW)1 塔式起重机 QT40（TQ2-6） 48 1 48 2 塔式起重机 QT40（TQ2-6） 48 1 48 3 载货电梯 JT1 7.5 1 7.5 4 载货电梯 JT1 7.5 1 7.5 5 混凝土输送泵 HB-15 32.2 1 32.2 6 钢筋调直机 GT6/7 钢筋切断机 QJ32-1 3 1 3 8 钢筋弯曲机 GW40 3 1 3 9 交流电焊机 BX3-120-1 9 1 9 10 交流电焊机 BX3-200-2 23.4 1 23.4 11 交流电焊机 BX3-120-1 9 1 9 12 木工电刨 MIB2-80/1 0.7 1 0.7 13 木工圆锯 MJ106 5.5 1 5.5 14 木工平刨床 MB503A 3 1 3 15 碘钨灯 0.5 1 0.5 16 白炽灯 1 1 1 17 荧光灯 0.2 1 0.2 -三、设计内容和步骤1、现场勘探及初步设计:(1)本工程所在施工现场范围内施工前无各种埋地管线。(2)现场采用380V低压供电，设一配电总箱，内有计量设备，采用TN-S系统供电。(3)根据施工现场用电设备布置情况，总箱进线采用导线直接埋地敷设，干线采用直接埋地敷设，用电器导线采用直接埋地敷设。布置位置及线路走向参见临时配电系统图及现场平面图，采用三级配电，三级防护。(4)按照JGJ46-2005规定制定施工组织设计，接地电阻R4。2、确定用电负荷:(1)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 48kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×48 = 60.72 kWPjs = Kx×Pe =0.2×60.72 = 12.14kWQjs = Pjs× tg=12.141.33 = 16.19 kvar(2)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 48kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×48 = 60.72 kWPjs = Kx×Pe =0.2×60.72 = 12.14kWQjs = Pjs× tg=12.141.33 = 16.19 kvar(3)、载货电梯Kx = 0.2 Cos = 0.6 tg = 1.33Pjs = 0.2×7.5 = 1.5 kWQjs = Pjs× tg=1.51.33 = 2 kvar(4)、载货电梯Kx = 0.2 Cos = 0.6 tg = 1.33Pjs = 0.2×7.5 = 1.5 kWQjs = Pjs× tg=1.51.33 = 2 kvar(5)、混凝土输送泵Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×32.2 = 9.66 kWQjs = Pjs× tg=9.661.02 = 9.86 kvar(6)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×11 = 3.3 kWQjs = Pjs× tg=3.31.02 = 3.37 kvar(7)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×3 = 0.9 kWQjs = Pjs× tg=0.91.02 = 0.92 kvar(8)、钢筋弯曲机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×3 = 0.9 kWQjs = Pjs× tg=0.91.02 = 0.92 kvar(9)、交流电焊机Kx = 0.35 Cos = 0.4 tg = 2.29将Jc =50%统一换算到Jc1 =100%的额定容量Pn = Sn ×Cos = 90.4=3.6kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.5/1)1/2×3.6 = 2.55 kWPjs = Kx×Pe =0.35×2.55 = 0.89kWQjs = Pjs× tg=0.892.29 = 2.04 kvar(10)、交流电焊机Kx = 0.35 Cos = 0.4 tg = 2.29将Jc =50%统一换算到Jc1 =100%的额定容量Pn = Sn ×Cos = 23.40.4=9.36kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.5/1)1/2×9.36 = 6.62 kWPjs = Kx×Pe =0.35×6.62 = 2.32kWQjs = Pjs× tg=2.322.29 = 5.31 kvar(11)、交流电焊机Kx = 0.35 Cos = 0.4 tg = 2.29将Jc =50%统一换算到Jc1 =100%的额定容量Pn = Sn ×Cos = 90.4=3.6kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.5/1)1/2×3.6 = 2.55 kWPjs = Kx×Pe =0.35×2.55 = 0.89kWQjs = Pjs× tg=0.892.29 = 2.04 kvar(12)、木工电刨Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.3×0.7 = 0.21 kWQjs = Pjs× tg=0.211.33 = 0.28 kvar(13)、木工圆锯Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.651.33 = 2.2 kvar(14)、木工平刨床Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.3×3 = 0.9 kWQjs = Pjs× tg=0.91.33 = 1.2 kvar(15)、碘钨灯Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.5×1 = 0.15 kWQjs = Pjs× tg=0.151.02 = 0.15 kvar(16)、白炽灯Kx = 0.9 Cos = 0.9 tg = 0.48Pjs = 0.9×1×1 = 0.9 kWQjs = Pjs× tg=0.90.48 = 0.44 kvar(17)、荧光灯Kx = 0.2 Cos = 0.8 tg = 0.75Pjs = 0.2×0.2×1.2 = 0.048 kWQjs = Pjs× tg=0.050.75 = 0.04 kvar(18)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×Pjs = 0.9(12.14+12.14+1.5+1.5+9.66+3.3+0.9+0.9+0.89+2.32+0.89+0.21+1.65+0.9+0.15+0.9+0.05) = 45.002 kW总的无功功率Qjs = Kx×Qjs =0.9(16.19+16.19+2+2+9.86+3.37+0.92+0.92+2.04+5.31+2.04+0.28+2.2+1.2+0.15+0.44+0.04) = 58.622 kvar总的视在功率Sjs = ( Pjs2+Qjs2 )1/2 = (45.0022+58.6222)1/2 = 73.904 kVA总的计算电流计算Ijs = Sjs/(1.732×Ue) = 73.904/(1.732×0.38) = 112.288 A3、1号干线线路上导线截面及分配箱、开关箱内电气设备选择:在选择前应对照平面图和系统图先由用电设备至开关箱计算，再由开关箱至分配箱计算，选择导线及开关设备。分配箱至开关箱，开关箱至用电设备的导线敷设采用铜橡皮绝缘导线。(1)、塔式起重机开关箱至塔式起重机导线截面及开关箱内电气设备选择（开关箱以下用电器启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.6 tg = 1.33Ijs = Kx ×Pe /(1.732×Ue ×Cos) = 160.72/(1.7320.380.6) = 153.75Aii)选择导线选择BX-4×50+1×25 ，直接埋地时其安全载流量为178A。iii)选择电气设备选择开关箱内隔离开关为DZ1