当n根电缆并联时，需要将表中给出的值相乘
乘以n。如果电缆长度（Lact）不是10 m，则需要乘以
表中由以下系数给出的值：
6.3.2故障点短路功率的计算
确定电路中某一点短路功率的规则
安装时，根据各元件的短路功率
该电路类似于与等效计算相关的电路
进入权特别地：
•串联元件的功率等于
单功率的倒数（如阻抗的并联）；
•并联元件的短路功率等于单个
短路功率（如阻抗系列）。
电路的元件被认为是串联或并联的，参见
来自故障点的电路。
在不同支路并联的情况下，电流在
当短路电流在
已计算出故障点。必须这样做，以确保正确的选择
安装在分支中的保护装置数量。

With n cables in parallel, it is necessary to multiply the value given in the table by n. If the length of the cable (Lact) is other than 10 m, it is necessary to multiply the value given in the table by the following coefficient: 6.3.2 Calculation of the short-circuit power at the fault point The rule for the determination of the short-circuit power at a point in the installation, according to the short-circuit power of the various elements of the circuit, is analogue to that relevant to the calculation of the equivalent admittance. In particular: • the power of elements in series is equal to the inverse of the sum of the inverses of the single powers (as for the parallel of impedances); • the short-circuit power of elements in parallel is equal to the sum of the single short-circuit powers (as for the series of impedances). The elements of the circuit are considered to be in series or parallel, seeing the circuit from the fault point. In the case of different branches in parallel, the distribution of the current between the different branches shall be calculated once the short-circuit current at the fault point has been calculated. This must be done to ensure the correct choice of protection devices installed in the branches.