XLS《计算》

,,

"∑M=∑P・L",,

,"S:导线截面",,

,,

,,

,"C:材料内部系数,根据线路电压和电流种类查表取用",,

,,

,,

"77" ,"[ε]:工地临时网路允许电压降",,

,,

,,

"则导线截面为: ,"S=∑P*L/(C*[ε])=",,

,"6.12244897959184","mm2",,

"

3、按导线机械强度校核",,

,,

,,

, "查表导线满足按机械强度所允许的最小截面",,

,,

,,

, "则最终确定导线截面为:",,

,"50","mm2",,

, ,,

,,

,,

, "线路6",,

,,

,,

, "

1、按导线的允许电流选择",,

,,

,,

, ,"Il=1000∑P/(31/2*Ul*cosφ)=",,

,,

"222.836946003013","A" "其中:","∑P:各段线路负荷计算功率",,

,"110","kW",,

,"Il:线路工作电流值",,

,,

,,

,"Ul:线路工作电压值",,

,"三相五线制Ul=",,

"380","V" ,"cosφ:用电设备功率因数,一般建筑工地取",,

,,

,"0.75" "查表得导线截面S为:",,

"50","mm2",,

,,

"

2、按导线的允许电压降校核",,

,,

,,

, ,"ε=∑M/(C*S)=∑P*L/(C*S)=",,

,,

"0.857142857142857","%" ,"ε","≤","[ε]=","7","%",,

"其中:","ε:导线电压降",,

,,

,,

,"L:各段线路长度",,

"30","m",,

, ,"∑M:各段线路负荷矩(kW・m)",,

,,

"∑M=∑P・L",,

,"S:导线截面",,

,,

,,

,"C:材料内部系数,根据线路电压和电流种类查表取用",,

,,

,,

"77" ,"[ε]:工地临时网路允许电压降",,

,,

,,

"则导线截面为: ,"S=∑P*L/(C*[ε])=",,

,"6.12244897959184","mm2",,

"

3、按导线机械强度校核",,

,,

,,

, "查表导线满足按机械强度所允许的最小截面",,

,,

,,

, "则最终确定导线截面为:",,

,"50","mm2",,

, ,,

,,

,,

, "

四、变压器容量计算",,

,,

,,

, ,"P0=1.05P/cosφ=1.4P=",,

,"130.2","kVA",,

"其中:","P0:变压器功率",,

,,

,,

,"1.05:功率损失系数",,

,,

,,

"计算参数",,

,,

,,

"K1:全部施工用电设备同时使用系数",,

, ,"10台以内","0.75" ,"10-30台","0.700000610351562" ,"30台以上","0.600000305175781" ,,

,,

,,

"常用配电导线持续允许电流表(A)",,

,,

,,

"导线标称截面(mm2)","TJ型(铜线)裸线",,

"橡皮或塑料绝缘线单芯500",,

, ,,

,"BX型(铜芯橡皮线)",,

"BV型(铜芯塑料线)", "2.5"35",,

"32", "4"45",,

"42", "6"58",,

"55", "10"85",,

"75", "16","130","105","110",,

"105", "25","180","135","145",,

"138", "35","220","170","180",,

"170", "50","270","215","230",,

"215", "70","340","265","285",,

"265", "95","415","325","345",,

"325", "120","485","375","400",,

"375", "150","570","440","470",,

"430", "185","645","500","540",,

"490", "210","770","610","600",,

"-", ,,

,,

,,

"材料内部系数C",,

,,

"线路额定电压(V)",,

"线路系统及电流种类",,

"铜线" "380/220",,

"三相四线",,

"77" "380/220",,

"二相三线",,

"34" "220",,

,,

"12.800009765625" "110",,

,,

"3.20000244140625" "36",,

,,

"0.340000305175781" "24",,

"单相或直流",,

"0.153" "12",,

,,

"0.038" ,,

,,

"导线按机械强度所允许的最小截面"