施工用电负荷计算书

施工用电负荷计算书一、编制依据:1、《施工现场临时用电安全技术标准》(JGJ46-88)。2、《建筑施工安全检查标准》(JGJ59,99)及其实施指南。3、《建筑工程临时用电设计与实例手册》。二、工程概况:本工程为城乡规划建设局综合楼工程，为地下一层、地上九层框架构造，950m，8268m368三、负荷计算书1、本工程拟用的机械设备表(kw)(kvA)(kw\kvA)115230kwSS60×5025.5211kw砼搅拌机JZC,3503ZX501.144.4kw4ZB501.122.2kw平板振动器5HJ3003412kw砂浆机61001100kvA钢筋对焊机UN,1001326kw钢筋弯曲机GW6,40313kw钢筋切断机QJ32,143.5143.5kvA电渣压力焊机339kw木工圆锯Φ40015kw照明2、单台设备的负荷计算施工升降机:εn,25%3-10得Ic,15.4Aη,87%cosΦ=0.853-1tgΦ=0.62Pc,Ps,2×?εn×Pn=2×(?25/100)×15=15kwQc,Ps×tgΦ,15×0.62=9.3kvarIc=2×15.4=30.8A3-10)砼搅拌机3-10Ic,11.6Aη,85.5%cosΦ=0.843-1tgΦ=0.64Pc,Ps,5.5kwQc,Ps×tgΦ,5.5×0.62=3.52kvarIc=11.6A3-10)平板振动器，插入式振动器3-10Ic,2.6Aη,76%cosΦ=0.86查表3-1tgΦ=0.593Pc,Ps,1.1kwQc,Ps×tgΦ,1.1×0.593=0.652kvarIc=2.6A3-10)砂浆机、钢筋弯曲机、钢筋切断机3-10Ic,6.8Aη,82.5%cosΦ=0.81查表3-1tgΦ=0.724Pc,Ps,3kwQc,Ps×tgΦ,3×0.724=2.17kvarIc=6.8A3-10)钢筋对焊机Sn,100kvAεn,20%cosΦ=0.623-1tgΦ=1.266Pc,Ps,?εn×Sn×cosΦ,(?20/100)×100×0.62,27.73kwQc,Ps×tgΦ,27.73×1.266=35.1kvar2.6cosΦ=0.623-1tgΦ=1.266Pc,Ps,?εn×Sn×cosΦ,(?36/100)×43.5×0.62,16.18kwQc,Ps×tgΦ,16.18×1.266=20.48kvarIc=Ps/(Un?cosΦ)=16.18/(0.38×0.62)=68.68A3、设备负荷汇总表Ic序号设备名称(kw)(kvar)(A)1施159.330.825.53.5211.6砼搅拌机31.10.6522.6插入式振动器4平板振动器1.10.6522.6532.176.8砂浆机627.7335.1117.7钢筋对焊机7钢筋弯曲机32.176.8832.176.8钢筋切断机916.1820.4868.68电渣压力焊机10木工圆锯32.176.84、施工用电设备组的负荷计算:4.1场回路拟用设备Ic设备名称数量号(kw)(kvar)(A)122×15,302×9.3,18.362×30.8,61.6施工升降机222×5.5,112×3.52,7.042×11.6,23.2砼搅拌机3砂浆机44×3,124×2.17,8.684×6.8,27.2444×1.1,4.44×0.652,2.6084×2.6,10.4插入式振动器522×1.1,2.22×0.652,1.3042×2.6,5.2平板振动器合计59.638.232127.61-2Kx,0.6负荷计算:Pc=Kx?ΣPsj=0.6×59.6=35.76kw无功功率:Qc,Pc×tgΦ,35.76×(0.62+0.64+0.724+0.593+0.593)/5=22.67kvar2222:Sc,?(Pc+Qc),?(35.76+22.67)=42.34kvA计算电流:Ic=Sc/(?3Un)=42.34/(?3×0.38)=64.33A依据计算电流选择导线，分箱开关漏保66A(40?时)HG1-100DZ15LE-100/4902I,75mAt,0.1s??按允许电压降校核:L,50m查表得C,46.32S,[Pc?L/(C?ε)]%=[35.76×50/(46.3×5%)]%=7.72mm按机械强度选择:234-43:BLV10mm为满足上述三者要求，施工现场回路选择BLV3×16+1×10线。楼层用电回路(含钢筋加工场)。拟用设备PcQcIc设备名称号量(kw)(kvar)(A)1127.7335.1117.7222×3,62×2.17,4.342×6.8,13.6弯曲机3132.176.8钢筋切断机4电渣压力焊机22×16.18,32.362×20.48,40.962×68.68,137.36533×3,93×2.17,6.513×6.8,20.4木工圆锯78.0989.08295.86合计由于钢筋电渣焊时，不浇捣砼，所以未计算砼浇捣设备,0.35K,0.7K负荷计算:Pc,K×?Pc+K×?Pc,0.7×(6+3+9)+0.35×力力焊焊(27.73+32.36),12.6+21.03,33.63kw无功功率:Qc,Pc×tgΦ,33.63×(1.266+0.724+0.724+1.266+0.724)/5=31.64kvar2222:Sc,?(Pc+Qc),?(33.63+31.64)=46.17kvA计算电流:Ic=Sc/(?3Un)=46.17/(?3×0.38)=70.15A依据计算电流选择导线，分箱开关漏保90A(40?时)HG1-100DZ15LE-100/4902I,75mAt,0.1s??按允许电压降校核:L,100m查表得C,46.32S,[Pc?L/(C?ε)]%=[33.63×100/(46.3×5%)]%=14.53mm按机械强度选择:234-43:BLV10mm为满足上述三者要求，施工现场回路选择BLV3×25+2×16线。K,0.9?有功功率:Pc,K×?Pc,0.9×(35.26+33.63),62.00kw?无功功率:Qc,K×?Qc,0.9×(22.67+31.64),48.88kvar?2222:Sc,?(Pc+Qc),?(62+48.88)=78.95kvA功率因素:cosΦ=Pc/Sc=62.00/78.95=0.785计算电流:Ic=Pc/(?3Un?cosΦ)=62.00/(?3×0.38×0.785)=120.00A变压器容量的校核:S,K×K×S,1.05×1.1×78.95=91.19kvA12c150kvA低压进线的选择:Ic=120.00A3-7，BLV3×50+2×35:135A(明敷，40?时)四、施工现场配电概况1TN,S电)送至各安排电箱(二级配电)，再引至各用电设备的开关(三级配电)，在配电箱”。刀闸、漏电保护器。Ic=200A,I,200mA,t,0.1s。单机箱的漏??特别场所，如潮湿狭窄管道场所选用??I,15mA，t,0.1s4PE/黄双色线)。在配电柜、井架、钢筋加工区、用电设备较集中处都做好PE线的重复接地，接地电阻10Ω(可与大楼的永久接地相连接)。30Ω(如与重复接10Ω)。I,30mA，t,0.1s，灯具??PE五、安全技术措施与留意事项1、配电室严格按《施工现场临时用电安全技术标准》(JGJ46-88)的要求设2个干粉灭火器、200kg的消防砂，各线路开关标明用途，配电室不堆放其他物品。10cm铺砂块以保护电缆，电缆沿线要做标记。6m，4m。工棚内的电线、灯具的安装修理要由电工完成，严禁