印刷厂棚改9#楼 临时用电施工方案施工临时用电方案本工程位于哈尔滨市道里区工农大街东南侧，龙葵东路西南侧，为商品住宅楼。地下一层，地上三十一层，总建筑面积26838.76m2，地下1层层高4.2m，1层层高4.5m，2层、3层层高3.5m，4层层高3.9m，5-31层层高3m，建筑总高度为97.7m，结构类型为剪力墙结构，楼长60.3m，楼宽23m。室外地坪标高为-0.3m。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 QTZ-63 55.5 1 55.5 2 升降机 SCD200/200 11 1 11 3 高压汞灯 3 1 3 4 钢筋调直机 GX-15 3 2 6 5 钢筋切断机 GJ-40A 4 2 8 6 直流电焊机 AX4-300 4 2 8 7 钢筋弯曲机 GJ240C 4 2 8 8 电锯 MJ109 11 2 22 9 型材切割机 J3GY-XB-400A 2.2 1 2.2 10 无齿锯 CQ400 3 6 18 11 碘钨灯 1 2 2 12 搅拌机 JD350 7.5 2 15 13 碘钨灯 1 1 1 -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，总箱进线采用导线空气明敷/架空线路敷设，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 = 0.85 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 55.5kWPe = n(Jc/Jc1)1/2Pn = 1(0.4/0.25)1/255.5 = 70.2 kWPjs = KxPe =0.8570.2 = 59.67kWQjs = Pjs tg=59.671.33 = 79.56 kvar(2)、升降机Kx = 0.85 Cos = 0.6 tg = 1.33Pjs = 0.8511 = 9.35 kWQjs = Pjs tg=9.351.33 = 12.47 kvar(3)、高压汞灯Kx = 0.6 Cos = 0.7 tg = 1.02Pjs = 0.631.1 = 1.98 kWQjs = Pjs tg=1.981.02 = 2.02 kvar(4)、钢筋调直机Kx = 0.65 Cos = 0.7 tg = 1.02Pjs = 0.656 = 3.9 kWQjs = Pjs tg=3.91.02 = 3.98 kvar(5)、钢筋切断机Kx = 0.65 Cos = 0.7 tg = 1.02Pjs = 0.658 = 5.2 kWQjs = Pjs tg=5.21.02 = 5.31 kvar(6)、直流电焊机Kx = 0.7 Cos = 0.6 tg = 1.33将Jc =50%统一换算到Jc1 =100%的额定容量Pn = 4kWPe = n(Jc/Jc1)1/2Pn = 2(0.5/1)1/24 = 5.66 kWPjs = KxPe =0.75.66 = 3.96kWQjs = Pjs tg=3.961.33 = 5.28 kvar(7)、钢筋弯曲机Kx = 0.65 Cos = 0.7 tg = 1.02Pjs = 0.658 = 5.2 kWQjs = Pjs tg=5.21.02 = 5.31 kvar(8)、电锯Kx = 0.65 Cos = 0.6 tg = 1.33Pjs = 0.6522 = 14.3 kWQjs = Pjs tg=14.31.33 = 19.07 kvar(9)、型材切割机Kx = 0.65 Cos = 0.6 tg = 1.33Pjs = 0.652.2 = 1.43 kWQjs = Pjs tg=1.431.33 = 1.91 kvar(10)、无齿锯Kx = 0.65 Cos = 0.6 tg = 1.33Pjs = 0.6518 = 11.7 kWQjs = Pjs tg=11.71.33 = 15.6 kvar(11)、碘钨灯Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.321 = 0.6 kWQjs = Pjs tg=0.61.02 = 0.61 kvar(12)、搅拌机Kx = 0.75 Cos = 0.85 tg = 0.62Pjs = 0.7515 = 11.25 kWQjs = Pjs tg=11.250.62 = 6.97 kvar(13)、碘钨灯Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.311 = 0.3 kWQjs = Pjs tg=0.31.02 = 0.31 kvar(14)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 = KxPjs = 0.9(59.67+9.35+1.98+3.9+5.2+3.96+5.2+14.3+1.43+11.7+0.6+11.25+0.3) = 115.958 kW总的无功功率Qjs = KxQjs =0.9(79.56+12.47+2.02+3.98+5.31+5.28+5.31+19.07+1.91+15.6+0.61+6.97+0.31) = 142.544 kvar总的视在功率Sjs = ( Pjs2+Qjs2 )1/2 = (115.9582+142.5442)1/2 = 183.752 kVA总的计算电流计算Ijs = Sjs/(1.732Ue) = 183.752/(1.7320.38) = 279.191 A3、塔吊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 /(1.732Ue Cos) = 170.2/(1.7320.380.6) = 177.77Aii)选择导线选择BX-470 ，直接埋地时其安全载流量为213A。iii)选择电气设备选择开关箱内隔离开关为DZ10-250/3 ，其脱扣器整定电流值为Ir = 200A，漏电保护器为 DZ10L-250/3。(2)、升降机开关箱至升降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 /(1.732Ue Cos) = 111/(1.7320.380.6) = 27.86Aii)选择导线选择BX-44 ，直接埋地时其安全载流量为41A。iii)选择电气设备选择开关箱内隔离开关为DZ5-50/3 ，其脱扣器整定电流值为Ir = 40A，漏电保护器为 DZ15L-100/30。(3)、高压汞灯开关箱至高压汞灯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 = 0.7 tg = 1.02Ijs = Kx Pe /(Ue Cos) = 13/(0.220.7) = 19.48Aii)选择导线选择XV-450 ，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DZ10-250/3 ，其脱扣器整定电流值为Ir = 200A，漏电保护器为 DZ10L-250/3。(4)、塔吊至第1组电机(塔式起重机、升降机)的开关箱的导线截面及分配箱内开关的选择i) 计算电流塔式起重机Kx = 0.85 Cos= 0.6 tg= 1.33Ijs = Kx Pe 台数/(1.732Ue Cos) = 0.8570.21/(1.7320.380.6) = 151.11A升降机Kx = 0.85 Cos= 0.6 tg= 1.33Ijs= Kx