编号
设备名称
数量
容量
暂载率
换算后设备容量
PE
01
砼机
2
10.1
10.1×2
02
1
5.5
5.5
03
2
JC=25%
起重电动机
2
11
JC=40%
PE=2×11×
13.9×2
回转电动机
2
2.2
JC=20%
PE=2×22×
1.97×2
牵引电动机
2
1.5
JC=20%
PE=2×15×
1.34×2
04
振捣器
1
2.2
2.2
05
无齿锯
1
2.2
2.2
06
电焊机
1
21KVA
CONφ=0.87
JC=60%
PE=2×11×××0.87
24.51
07
镝灯
2
3.5
3.5×1.2
8.4
08
圆盘锯
1
5.5
5.5
09
平刨
1
2.2
2.2
10
宿舍照明
3.6
3.6
3、计算总电流
I总=S/U=65.99/(0.36×)=100.26A
4、计算到分箱电流
1#分箱:01塔吊 02卷扬机 03振捣器 04无齿锯 05镝灯
PJ=0.75×(7.7+1.65+1.54+1.54+4.2)=12.47KW
QJ=0.75×(9+1.68+1.8+1.36+6.72)=15.42KVAR
Sj= Pj2+Q2= (12.4) 2+(15.42) 2 =19.83KVA
In=S/u=S/u=19.83/(0.38×)=30.13A
2#分箱:砼机、卷扬机、塔吊、振捣器、镝灯
PJ=0.75×(7.7+10.32×2+1.65+1.54+4.2)
=26.8KW
QJ=0.75×(9+10.52×2+1.8+1.36+6.72)
=29.94KVAR
Sj= nPj2+QJ2= (26.8) 2+(29.94) 2 =40.18KVA
In=S/u=40.18/(0.38×)=61.04A
3#分箱:电焊机、圆盘锯、平刨、宿舍照明
PJ=0.75×(13.67+3.85+1.54+3.6)=17.00KW
QJ=0.75×(27.07+3.39+1.36)=23.87KVAR
Sj=Pj2+QJ2 = (17) 2+(23.87) 2 =29.3KVA
IN=S/V=29.3/(0.38×)=44.52A
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