According to the direct current component of the generalized instantaneous power flowing into the two-terminal network, magnetizing inrush and internal fault can be distinguished. 根据输入端口的广义瞬时功率直流分量的大小,来区分励磁涌流和内部故障电流。
When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card. 在将信号源连接至开关卡时,请安装保护装置,限制传输至开关卡的故障电流和电压。