XLS《计算》

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, "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3",,

,,

,,

, "

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",,

, ,,

,,

,,

, "线路4",,

,,

,,

, "

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",,

, ,,

,,

,,

, "线路5",,

,,

,,

, "

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)",,