电压降计算表一(需知功率和距离)电缆截面积S(mm2)电缆电阻r(Ω/km)电缆电抗x(Ω/km)额定电压U(kV)额定功率Pjs(kW)无功功率Qjs(Kvar)视在功率Sjs(kVA)距离L(km)功率因数cosφ电压损失ΔU﹪备 注250.7270.12370.385037.562.50.30.88.52 电缆电阻r(Ω/km)是20℃时候测定值350.5240.0330.385037.562.50.30.85.70 500.3870.03050.385037.562.50.30.84.26 700.2680.02920.385037.562.50.30.83.01 950.1930.02730.385037.562.50.30.82.22 1200.1530.02670.385037.562.50.30.81.80 1500.1240.02670.385037.562.50.30.81.50 1850.09910.0270.385037.562.50.30.81.24 2400.07540.02570.385037.562.50.30.80.98 3000.06010.025