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o=0.247 Rg1=0.247×0.24=0.05928 Xg1=0.075×0.24=0.018 ∑R=0.01824+0.041167+0.05928=0.118687 ∑X=0.076418+0.0125+0.018=0.106918 4.破碎机电机处短路电流Id4计算 MYP 3×35+1×16型电缆的电阻、电抗：L2=10米， 阻抗参数：Ro=0.683 Rg1=0.683×0.01=0.00683 Xg1=0.084×0.01=0.00084 ∑R=0.01824+0.041167+0.00683=0.066237 ∑X=0.076418+0.0125+0.00084=0.089758 5.2#移变二次出口端的短路电流Id5计算 （1）系统阻抗 变压器二次电压1200V，容量500kVA，系统短路容量按50MVA计算；则系统电抗为 （2）高压电缆阻抗 10kV电缆L1=0.49km 查表得,Ro=0.588 高压电缆电阻、电抗： Rg=0.588×0.49=0.28812 Xg=0.078×0.49=0.03822 （3）变压器阻抗 查表得KBSGZY-500/10型移动变电站的vs=4, ΔPN.T=3100W 则变压器的电阻、电抗： 6.1#馈电入口处短路电流Id6计算 MYP 3×70+1×25型电缆的电阻、电抗：L7=230米， 阻抗参数：Ro=0.346 Rg1=0.346×0.23=0.07958 Xg1=0.078×0.23=0.01794 ∑R=0.022038+0.07958=0.101618 |