hp低压三相和单相接地故障电流计算表

—S200.00MVA—D,yn111000KVA—LMY铝80x10—L15m—ZRBV4x95+1x50—L240m—ZRBV5x6—L340m—ZRBV5x4—L410m三相短路电流(KA)单相接地故障电流(KA)短路电流冲击系数短路冲击电流(KA)短路全电流最大有效值RXRφPXφPZK=^(RK2+XK2)ZφP=^(RφP2+XφP2)I″=1.05Un/(^3*Zk)Id=Un/(^3*ZφP)XK/RKKch查图4-13ich=^2KchI″Ich=^(1+2(Kch-1)21系统S0.080.800.050.532变压器T1.229.521.229.523母线L10.200.9650.8252.0541+2+3k11.5011.292.1012.1011.3812.2820.2417.877.521.6647.5227.695线路L27.4013.2022.2026.0064+5k28.9024.4924.3038.1026.0545.198.844.862.751.3116.379.657线路L3114.684.40344.0410.4086+7k3123.5828.89368.3448.50126.91371.511.820.590.231.022.631.829线路L443.001.20129.002.80108+9k4166.5830.09497.3451.30169.27499.971.360.440.181.011.941.36注:表中Un=380V，1.05Un/^3=230V，Un/^3=220V元件阻抗(mΩ)短路点阻抗(mΩ)电路元件短路点序号注:表中红色字体为可修改部份查表查表查表低压母排母线至层配电箱型号低压母排母线至层配电箱长度房间配电箱到各设备长度层配电箱到房间配电箱型号层配电箱到房间配电箱长度变压器高压侧系统短路容量变压器型号SC(9/10)B变压器至底压母排母线型号变压器至底压母排母线长度房间配电箱到各设备型号25035025035013[2(125x10)]+125x100.0140.0420.1470.170.3170.34423[2(125x10)]+80x100.0140.0540.1470.170.340.36734(125x10)0.0280.0560.1470.170.3170.34443(125x10)+80x80.0280.0780.1470.170.3410.36953(125x10)+80x6.30.0280.0880.1470.170.3430.3764[2(100x10)]0.0160.0320.1560.1810.3360.36673[2(100x10)]+100x100.0160.0480.1560.1810.3360.36683[2(100x10)]+80x80.0160.0660.1560.1810.350.3894(100x10)0.0330.0660.1560.1810.3360.366103(100x10)+80x100.0330.0730.1560.1810.3490.378114(80x10)0.040.080.1680.1930.3610.39123(80x10)+63x6.30.040.1160.1680.1930.380.4113铜4(100x10)0.0250.050.1560.1810.3360.36614铜3(100x10)+80x80.0250.0560.1560.1810.350.3815铜4(80x8)0.0310.0620.170.1950.3640.39416铜3(80x8)+63x6.30.0310.0780.170.1950.3820.41217铜3(80x8)+50x50.0310.1040.170.1950.3940.423184(100x8)0.040.080.1580.1820.340.368193(100x8)+80x80.040.090.1580.1820.3520.381203(100x8)+63x6.30.040.1160.1580.1820.370.399214(80x8)0.050.10.170.364223(80x8)+63x6.30.050.1260.170.382233(80x8)+50x50.050.1690.170.394244(80x6.3)0.060.120.1720.368253(80x6.3)+63x6.30.060.1360.1720.384263(80x6.3)+50x50.060.1790.1720.396274(63x6.3)0.0760.1520.1880.4283(63x6.3)+40x40.0760.2620.1880.426294(50x5)0.1190.2380.1990.423303(50x5)+40x40.1190.3050.1990.437314(40x4)0.1860.3720.2120.451序号低压母线单位长度阻抗值单位：mΩ/m母线规格（mm）RˊRφPˊ=Rˊ+RPˊXˊXφPˊD（mm）Dn=200mm、D（mm）④当采用密集型母线作为配电导线时，该导线的阻抗值应按产品生产厂家提供的数值和实际安装长度进行计算，在计算保护线的阻抗时，还要考虑工程中保护线的配置方式。①母线规格一栏除注明铜以外,均为铝母线;母线规格建议优先采用100x10、　80x8、63x6.3、50x5及40x4.②本表所列数据对于母线平放或竖放均适用,PEN线在边位，D为相线间距，Dn为PEN线与邻近相线中心间距。当变压器容量≤630kVA时，D为250mm;当变压器容量≥630kVA时，D为350mm.③R'、X'php为20℃时导线单位长度电阻值。④当采用密集型母线作为配电导线时，该导线的阻抗值应按产品生产厂家提供的数值和实际安装长度进行计算，在计算保护线的阻抗时，还要考虑工程中保护线的配置方式。①母线规格一栏除注明铜以外,均为铝母线;母线规格建议优先采用100x10、　80x8、63x6.3、50x5及40x4.②本表所列数据对于母线平放或竖放均适用,PEN线在边位，D为相线间距，Dn为PEN线与邻近相线中心间距。当变压器容量≤630kVA时，D为250mm;当变压器容量≥630kVA时，D为350mm.③R'、X'php为20℃时导线单位长度电阻值。