红庆河临时用电施工组织设计.doc

目 录一、编制依据2二、施工条件22.1工程概况2三、设计内容和步骤及现场各回路临时供电施工图23.1现场勘探及初步设计:23.2一回路为配电室到副井一级箱23.3二回路为配电室到产品仓a箱183.4、三回路为配电室到产品仓分配电箱b343.5、四回路为配电室到产品仓滑模平台44四、绘制临时供电施工图514.1 施工现场临时用电平面图：51五、安全用电技术措施515.1安全用电技术措施515.2安全用电组织措施565.3自备电源的安全技术要求565.4外电防护的安全技术要求56六、安全用电防火措施576.1施工现场发生火灾的主要原因576.2预防电气火灾的措施58七、 施工用电危险辨识59八、 触电应急救援措施608.1脱离电源608.2对于低压触电事故，可采用下列方法使触电者脱离电源608.3对于高压触电事故，可采用下列方法使触电者脱离电源608.4触电者如果在高空作业时触电，断开电源时，要防止触电者摔下来造成二次伤害60 临时施工组织设计一、编制依据 低压配电设计规范gb50054-2011中国建筑工业出版社 建筑工程施工现场供电安全规范gb50194-2002中国建筑工业出版社 通用用电设备配电设计规范gb50055-2011中国建筑工业出版社 供配电系统设计规范gb50052-2009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jgj59-2011二、施工条件 2.1工程概况 本工程地处内蒙古鄂尔多斯，有产品仓4个、副井井塔等单位工程，主要用电设备有塔吊、输送泵、钢筋弯曲机、煨弯机、电焊机等。施工现场临时用电从配电室引出，分四个回路。一回路为配电室到副井一级箱，二回路为配电室到产品仓a箱，三回路为配电室到产品仓分配电箱b，四回路为配电室到产品仓滑模平台。 三、设计内容和步骤及现场各回路临时供电施工图3.1现场勘探及初步设计:(1)根据施工现场用电设备布置情况，设个两个一级配电箱，五个二级配电箱。采用导线埋地敷设，电缆埋深0.7m。线路具体走向参见临时配电系统图及现场平面图。(2)按照jgj46-2005规定制定施工组织设计，接地电阻r4。3.2一回路为配电室到副井一级箱施工现场用电量统计表序号设备名称铭牌功率(kw)安装功率(kw)数量合计功率(kw)1钢筋切断机3.003.0013.002钢筋弯曲机3.003.0026.003钢筋调直机5.005.0015.004钢筋弯箍机3.003.0026.005套丝机5.005.00210.006切割机3.003.0013.007照明3.003.0013.008电焊机12.007.59430.369切割机3.503.5013.5010照明4.004.0014.0011手持工具1.001.0022.0012圆盘锯3.503.5013.5013照明1.001.0022.0014塔式起重机30.0037.95137.9515塔吊照明5.005.0015.0016塔吊备用5.005.0015.0017泥浆泵_海泊尔-80(输送泵)110.00110.001110.0018地泵照明3.003.0013.0019照明、办公20.0020.00120.0020电焊机3.003.0013.0021合计265.313.2.1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，总线采用电缆线埋地敷设，干1采用电缆线埋地敷设，干2采用电缆线埋地敷设，干3采用电缆线埋地敷设，分1采用导线架空敷设，分2采用导线架空敷设，分3采用导线架空敷设，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，两极防护。(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)钢筋切断机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(2)钢筋弯曲机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 6.00 = 4.20kwqjs = pjstg = 4.20 2.29 = 9.62kvar(3)钢筋调直机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 5.00 = 3.50kwqjs = pjstg = 3.50 2.29 = 8.02kvar(4)钢筋弯箍机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 6.00 = 4.20kwqjs = pjstg = 4.20 2.29 = 9.62kvar(5)套丝机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 10.00 = 7.00kwqjs = pjstg = 7.00 2.29 = 16.04kvar(6)切割机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(7)照明组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(8)电焊机组kx = 0.45，cos = 0.45，tg = 1.98将jc = 40%统一换算到jc = 100%的额定容量pe = n(jc/jc1)1/2pn = 4(0.40/1.00)1/212.00 = 30.36kwpjs = kxpe = 0.45 30.36 = 13.66kwqjs = pjstg = 13.66 1.98 = 27.11kvar(9)切割机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.50 = 2.45kwqjs = pjstg = 2.45 2.29 = 5.61kvar(10)照明组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 4.00 = 2.80kwqjs = pjstg = 2.80 2.29 = 6.42kvar(11)手持工具组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 1.00 = 0.70kwqjs = pjstg = 0.70 2.29 = 1.60kvar(12)圆盘锯组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 3.50 = 2.45kwqjs = pjstg = 2.45 1.02 = 2.50kvar(13)照明组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 1.00 = 0.70kwqjs = pjstg = 0.70 1.02 = 0.71kvar(14)塔式起重机组kx = 0.30，cos = 0.70，tg = 1.02将jc = 40%统一换算到jc = 25%的额定容量pe = n(jc/jc1)1/2pn = 1(0.40/0.25)1/230.00 = 37.95kwpjs = kxpe = 0.30 37.95 = 11.38kwqjs = pjstg = 11.38 1.02 = 11.61kvar(15)塔吊照明组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 5.00 = 3.50kwqjs = pjstg = 3.50 2.29 = 8.02kvar(16)塔吊备用组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 5.00 = 3.50kwqjs = pjstg = 3.50 2.29 = 8.02kvar(17)泥浆泵_海泊尔-75组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 110.00 = 77.00kwqjs = pjstg = 77.00 1.02 = 78.56kvar(18)地泵照明组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 1.02 = 2.14kvar(19)照明、办公组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 20.00 = 14.00kwqjs = pjstg = 14.00 1.02 = 14.28kvar(20)电焊机组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 1.02 = 2.14kvar(21)手持工具组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 1.00 = 0.70kwqjs = pjstg = 0.70 1.02 = 0.71kvar(22)照明组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 1.00 = 0.70kwqjs = pjstg = 0.70 1.02 = 0.71kvar(23)总的计算负荷计算，干线同期系数取 kx = 0.90总的有功功率pjs = 1.1kxpjs = 1.10.90(2.10+4.20+3.50+4.20+7.00+2.10+2.10+13.66+2.45+2.80+0.70+2.45+0.70+11.38+3.50+3.50+77.00+2.10+14.00+2.10+0.70+0.70) = 161.32kw总的无功功率qjs =1.1kxqjs = 1.10.90(4.81+9.62+8.02+9.62+16.04+4.81+4.81+27.11+5.61+6.42+1.60+2.50+0.71+11.61+8.02+8.02+78.56+2.14+14.28+2.14+0.71+0.71) = 225.62kvar总的视在功率sjs = (pjs2+qjs2)1/2 = (161.322+225.622)1/2 = 277.36kva总的计算电流计算ijs = sjs/(1.732ue) = 277.36/(1.7320.38) = 421.42a(3)、选择变压器根据计算的总的视在功率选择sl7-400/10 型三相电力变压器，它的容量为400.00kva277.36kva1.20(增容系数)能够满足使用要求，其高压侧电压为10.00kv同施工现场外的高压架空线路的电压级别一致。(4)、选择总箱的进线截面及进线开关(1)选择导线截面： i) 按安全载流量： 上面已经计算出总计算电流ijs = 421.42a ii) 按允许电压降： s = 1.1kx(pl)/cu = 1.1 0.908250.00/(77.005.00) = 21.21mm2 iii) 根据前面两条： 电缆线埋地敷设，铜芯聚氯乙烯绝缘电缆线vv3150+270 ，其安全载流量为449a，截面面积300mm2，能够满足使用要求。(2)选择总进线开关：dz10-600/3 ，其脱扣器整定电流值为ir = 480a。(3)选择总箱中漏电保护器：zbm1-630/500 。(5)、干1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1至开关箱，开关箱至用电设备采用铜芯橡皮绝缘导线架空敷设。(1)钢筋切断机开关箱至钢筋切断机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.40) = 11.40aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为rmm1-63/12 。(2)钢筋弯曲机开关箱至钢筋弯曲机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.40) = 11.40aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为rmm1-63/12 。(3)钢筋调直机开关箱至钢筋调直机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.05.00/(1.7320.380.40) = 18.99aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0100.00/(77.005.00) = 0.26mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz15-40/3 ，其脱扣器整定电流值为ir = 32a。漏电保护器为zbm1-100/20 。(4)钢筋弯箍机开关箱至钢筋弯箍机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.40) = 11.40aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为rmm1-63/12 。(5)套丝机开关箱至套丝机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.05.00/(1.7320.380.40) = 18.99aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0100.00/(77.005.00) = 0.26mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz15-40/3 ，其脱扣器整定电流值为ir = 32a。漏电保护器为zbm1-100/20 。(6)切割机开关箱至切割机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.40) = 11.40aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为rmm1-63/12 。(7)照明开关箱至照明导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.40) = 11.40aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为rmm1-63/12 。(8)分1至第1组电机的开关箱的导线截面及分配箱内开关的选择i)ijs = 95.72aii)选择导线选择bx-316+26，空气明敷时其安全载流量为110a。室外架空铜芯导线按机械强度的最小截面为10mm2，满足要求。iii)选择电气设备选择分配箱内开关为dz10-250/3 ，其脱扣器整定电流值为ir = 200a。(9)分1进线及进线开关的选择i)计算电流kx = 0.70，cos = 0.60ijs =1.1 kxpe/(1.732uecos) = 1.10.70(3.001+3.002+5.001+3.002+5.002+3.001+3.001)/(1.7320.380.60) = 70.20a由于计算电流小于该分配箱下支线电流，所以取最大支线电流值：95.72aii)选择导线按允许电压降：s =1.1 kx(pl)/cu = 1.10.70500.00/(77.005.00) = 1.00mm2选择vv325+216 ，埋地敷设时其安全载流量为110a。iii)选择电气设备选择分配箱进线开关为dz10-250/3 ，其脱扣器整定电流值为ir = 200a。(10)干1导线截面及出线开关的选择i)选择导线截面按导线安全载流量：kx = 0.70，cos = 0.60ijs =1.1 kxpe/(1.732uecos) = 1.10.7036.00/(1.7320.380.60) = 70.20a由于计算电流小于该干线下支线电流，所以取最大支线电流值：95.72a按允许电压降：s =1.1 kx(pl)/cu = 1.10.70720.00/(77.005.00) = 1.44mm2选择vv325+216 ，埋地敷设时其安全载流量为110a。ii)选择出线开关干1出线开关选择dz10-250/3 ，其脱扣器整定电流值为ir = 200a。(6)、干2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2至开关箱，开关箱至用电设备采用铜芯橡皮绝缘导线架空敷设。(1)电焊机开关箱至电焊机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.45ijs = kxpe/(1.732uecos) = 1.07.59/(1.7320.380.45) = 25.63aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0240.00/(77.005.00) = 0.62mm2选择bx-31.5+26，空气明敷时其安全载流量为27a。iii)选择电气设备选择开关箱内开关为dz15-40/3 ，其脱扣器整定电流值为ir = 32a。漏电保护器为dz15l-30/3 。(2)切割机开关箱至切割机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.03.50/(1.7320.380.40) = 13.29aii)选择导线按允许电压降：s = kx(pl)/cu = 1.070.00/(77.005.00) = 0.18mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-100/16 。(3)照明开关箱至照明导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.04.00/(1.7320.380.40) = 15.19aii)选择导线按允许电压降：s = kx(pl)/cu = 1.080.00/(77.005.00) = 0.21mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz15-40/3 ，其脱扣器整定电流值为ir = 32a。漏电保护器为zbm1-100/16 。(4)手持工具开关箱至手持工具导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.01.00/(1.7320.380.40) = 3.80aii)选择导线按允许电压降：s = kx(pl)/cu = 1.020.00/(77.005.00) = 0.05mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(5)圆盘锯开关箱至圆盘锯导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.03.50/(1.7320.380.70) = 7.60aii)选择导线按允许电压降：s = kx(pl)/cu = 1.070.00/(77.005.00) = 0.18mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(6)照明开关箱至照明导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.01.00/(1.7320.380.70) = 2.17aii)选择导线按允许电压降：s = kx(pl)/cu = 1.020.00/(77.005.00) = 0.05mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(7)分2至第1组电机的开关箱的导线截面及分配箱内开关的选择i)ijs = 75.57aii)选择导线选择bx-310+26，空气明敷时其安全载流量为85a。室外架空铜芯导线按机械强度的最小截面为10mm2，满足要求。iii)选择电气设备选择分配箱内开关为dz10-250/3 ，其脱扣器整定电流值为ir = 200a。(8)分2进线及进线开关的选择i)计算电流kx = 0.70，cos = 0.60ijs =1.1 kxpe/(1.732uecos) = 1.10.70(7.594+3.501+4.001+1.001+3.501+1.001)/(1.7320.380.60) = 84.54aii)选择导线按允许电压降：s =1.1 kx(pl)/cu = 1.10.70411.79/(77.005.00) = 0.82mm2选择vv316+210 ，埋地敷设时其安全载流量为87a。iii)选择电气设备选择分配箱进线开关为dz10-250/3 ，其脱扣器整定电流值为ir = 200a。(9)干2导线截面及出线开关的选择i)选择导线截面按导线安全载流量：kx = 0.70，cos = 0.60ijs =1.1 kxpe/(1.732uecos) = 1.10.7043.36/(1.7320.380.60) = 84.54a按允许电压降：s =1.1 kx(pl)/cu = 1.10.70867.16/(77.005.00) = 1.73mm2选择vv316+210 ，埋地敷设时其安全载流量为87a。ii)选择出线开关干2出线开关选择dz10-250/3 ，其脱扣器整定电流值为ir = 200a。(7)、干3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3至开关箱，开关箱至用电设备采用铜芯橡皮绝缘导线架空敷设。(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i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.037.95/(1.7320.380.70) = 82.37aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0600.00/(77.005.00) = 1.56mm2选择bx-310+26，空气明敷时其安全载流量为85a。iii)选择电气设备选择开关箱内开关为dz10-250/3 ，其脱扣器整定电流值为ir = 200a。漏电保护器为dz10l-100/3 。(2)塔吊照明开关箱至塔吊照明导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.05.00/(1.7320.380.40) = 18.99aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0100.00/(77.005.00) = 0.26mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz15-40/3 ，其脱扣器整定电流值为ir = 32a。漏电保护器为zbm1-100/20 。(3)塔吊备用开关箱至塔吊备用导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.40ijs = kxpe/(1.732uecos) = 1.05.00/(1.7320.380.40) = 18.99aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0100.00/(77.005.00) = 0.26mm2选择bx-31+26，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz15-40/3 ，其脱扣器整定电流值为ir = 32a。漏电保护器为zbm1-100/20 。(4)泥浆泵_海泊尔-75开关箱至泥浆泵_海泊尔-75导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.0110.00/(1.7320.380.70) = 238.76aii)选择导线按允许电压降：s = kx(pl)/cu = 1.02200.00/(77.005.00) = 5.71mm2选择bx-370+235，空气明敷时其安全载流量为285a。iii)选择电气设备选择开关箱内开关为dz10-600/3 ，其脱扣器整定电流值为ir = 480a。漏电保护器为dz10l-250/3 。(5)地泵照明开关箱至地泵照明导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.70) = 6.51aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(6)照明、办公开关箱至照明、办公导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.020.00/(1.7320.380.70) = 43.41aii)选择导线按允许电压降：s = kx(pl)/cu = 1.0400.00/(77.005.00) = 1.04mm2选择bx-34+16+11.5，空气明敷时其安全载流量为45a。iii)选择电气设备选择开关箱内开关为dz15-63/3 ，其脱扣器整定电流值为ir = 49a。漏电保护器为zbm1-100/50 。(7)电焊机开关箱至电焊机导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.03.00/(1.7320.380.70) = 6.51aii)选择导线按允许电压降：s = kx(pl)/cu = 1.060.00/(77.005.00) = 0.16mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(8)手持工具开关箱至手持工具导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.01.00/(1.7320.380.70) = 2.17aii)选择导线按允许电压降：s = kx(pl)/cu = 1.020.00/(77.005.00) = 0.05mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(9)照明开关箱至照明导线截面及开关箱内电气设备选择i)计算电流kx 取 1.0，cos = 0.70ijs = kxpe/(1.732uecos) = 1.01.00/(1.7320.380.70) = 2.17aii)选择导线按允许电压降：s = kx(pl)/cu = 1.020.00/(77.005.00) = 0.05mm2选择bx-31+16+11，空气明敷时其安全载流量为21a。iii)选择电气设备选择开关箱内开关为dz5-20/3 ，其脱扣器整定电流值为ir = 16a。漏电保护器为zbm1-63/10 。(10)分3至第1组电机的开关箱的导线截面及分配箱内开关的选择i)ijs = 260.98aii)选择导线选择bx-370+235，空气明敷时其安全载流量为285a。室外架空铜芯导线按机械强度的最小截面为10mm2，满足要求。iii)选择电气设备选择分配箱内开关为dz10-600/3 ，其脱扣器整定电流值为ir = 480a。(11)分3进线及进线开关的选择i)计算电流kx = 0.70，cos = 0.60ijs =1.1 kxpe/(1.732uecos) = 1.10.70(37.951+5.001+5.001+110.001+3.001+20.001+3.001+1.001+1.001)/(1.7320.380.60) = 362.58aii)选择导线按允许电压降：s =1.1 kx(pl)/cu = 1.10.703718.95/(77.005.00) = 7.44mm2选择vv3240+2120 ，埋地敷设时其安全载流量为395a。iii)选择电气设备选择分配箱进线开关为dz10-600/3 ，其脱扣器整定电流值为ir = 480a。(12)干3导线截面及出线开关的选择i)选择导线截面按导线安全载流量：kx = 0.70，cos = 0.60ijs =1.1 kxpe/(1.732uecos) = 1.10.70185.95/(1.7320.380.60) = 362.58a按允许电压降：s =1.1 kx(pl)/cu = 1.10.703718.95/(77.005.00) = 7.44mm2选择vv3240+2120 ，埋地敷设时其安全载流量为395a。ii)选择出线开关干3出线开关选择dz10-600/3 ，其脱扣器整定电流值为ir = 480a。3.2.2绘制临时供电施工图（1）、临时供电系统图：3.3二回路为配电室到产品仓a箱施工现场用电量统计表序号设备名称铭牌功率(kw)安装功率(kw)数量合计功率(kw)1塔式起重机30.0037.95137.952塔吊照明3.003.0013.003塔吊备用3.003.0013.004泥浆泵_海泊尔-80110.00110.001110.005照明3.003.0013.006圆盘锯3.503.5027.007照明1.001.0033.008钢筋切断机3.003.0013.009钢筋调直机5.005.0015.0010钢筋弯曲机3.003.0026.0011钢筋弯箍机3.003.0013.0012钢筋套丝机5.005.0015.0013切割机3.003.0013.0014电焊机12.007.59430.3615切割机3.503.50414.0016照明4.004.0014.0017手持电动工具1.001.0011.0018合计241.313.3.1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，总线采用电缆线埋地敷设，干1采用电缆线埋地敷设，干2采用电缆线埋地敷设，干3采用电缆线埋地敷设，分1采用导线架空敷设，分2采用导线架空敷设，分3采用导线架空敷设，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，两极防护。(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)塔式起重机组kx = 0.30，cos = 0.70，tg = 1.02将jc = 40%统一换算到jc = 25%的额定容量pe = n(jc/jc1)1/2pn = 1(0.40/0.25)1/230.00 = 37.95kwpjs = kxpe = 0.30 37.95 = 11.38kwqjs = pjstg = 11.38 1.02 = 11.61kvar(2)塔吊照明组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(3)塔吊备用组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(4)泥浆泵_海泊尔-75组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 110.00 = 77.00kwqjs = pjstg = 77.00 1.02 = 78.56kvar(5)照明组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(6)圆盘锯组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 3.50 = 2.45kwqjs = pjstg = 2.45 1.02 = 2.50kvar(7)照明组kx = 0.70，cos = 0.70，tg = 1.02pjs = kxpe = 0.70 1.00 = 0.70kwqjs = pjstg = 0.70 1.02 = 0.71kvar(8)钢筋切断机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(9)钢筋调直机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 5.00 = 3.50kwqjs = pjstg = 3.50 2.29 = 8.02kvar(10)钢筋弯曲机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 6.00 = 4.20kwqjs = pjstg = 4.20 2.29 = 9.62kvar(11)钢筋弯箍机组kx = 0.70，cos = 0.40，tg = 2.29pjs = kxpe = 0.70 3.00 = 2.10kwqjs = pjstg = 2.10 2.29 = 4.81kvar(12)钢筋套丝机组kx =